From 80179802cb46967cc838f634d7f261281dbcda8c Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Thu, 6 Oct 2022 15:07:13 +0200
Subject: [PATCH 01/13] fix: testing java 17 for samples

---
 .../pom.xml                                   |  4 +-
 .../customer/api/CustomerIntegrationTest.java | 20 +++++-----
 .../src/main/java/customer/api/Address.java   | 14 +------
 .../java/customer/api/AddressChanged.java     | 15 -------
 .../src/main/java/customer/api/Customer.java  | 25 +-----------
 .../java/customer/api/CustomerCreated.java    | 17 --------
 .../java/customer/api/CustomerEntity.java     | 13 ++++---
 .../main/java/customer/api/CustomerEvent.java | 13 ++++++-
 .../main/java/customer/api/NameChanged.java   | 14 -------
 .../main/java/customer/view/CustomerView.java | 39 ++++++-------------
 .../java/customer/api/CustomerEntityTest.java |  7 ++--
 11 files changed, 49 insertions(+), 132 deletions(-)
 delete mode 100644 samples/spring-eventsourced-customer-registry/src/main/java/customer/api/AddressChanged.java
 delete mode 100644 samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerCreated.java
 delete mode 100644 samples/spring-eventsourced-customer-registry/src/main/java/customer/api/NameChanged.java

diff --git a/samples/spring-eventsourced-customer-registry/pom.xml b/samples/spring-eventsourced-customer-registry/pom.xml
index fd94004a5b..5c2264ec82 100644
--- a/samples/spring-eventsourced-customer-registry/pom.xml
+++ b/samples/spring-eventsourced-customer-registry/pom.xml
@@ -16,7 +16,7 @@
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>customer.Main</mainClass>
 
-    <jdk.target>11</jdk.target>
+    <jdk.target>17</jdk.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
     <kalix-sdk.version>1.0.8</kalix-sdk.version>
@@ -123,7 +123,7 @@
               <name>${dockerImage}:%l</name>
               <build>
                 <!-- Base Docker image which contains jre-->
-                <from>docker.io/library/adoptopenjdk:${jdk.target}-jre-hotspot</from>
+                <from>docker.io/library/eclipse-temurin:${jdk.target}-alpine</from>
                 <createImageOptions>
                   <platform>linux/amd64</platform>
                 </createImageOptions>
diff --git a/samples/spring-eventsourced-customer-registry/src/it/java/customer/api/CustomerIntegrationTest.java b/samples/spring-eventsourced-customer-registry/src/it/java/customer/api/CustomerIntegrationTest.java
index 01c6e5fc2d..3169dbf3bf 100644
--- a/samples/spring-eventsourced-customer-registry/src/it/java/customer/api/CustomerIntegrationTest.java
+++ b/samples/spring-eventsourced-customer-registry/src/it/java/customer/api/CustomerIntegrationTest.java
@@ -34,7 +34,7 @@ public class CustomerIntegrationTest extends KalixIntegrationTestKitSupport {
   private Duration timeout = Duration.of(5, SECONDS);
 
   @Test
-  public void create() throws InterruptedException {
+  public void create() {
     String id = UUID.randomUUID().toString();
     Customer customer = new Customer(id, "foo@example.com", "Johanna", null);
 
@@ -47,11 +47,11 @@ public void create() throws InterruptedException {
             .block(timeout);
 
     Assertions.assertEquals(HttpStatus.OK, response.getStatusCode());
-    Assertions.assertEquals("Johanna", getCustomerById(id).name);
+    Assertions.assertEquals("Johanna", getCustomerById(id).name());
   }
 
   @Test
-  public void changeName() throws InterruptedException {
+  public void changeName() {
     String id = UUID.randomUUID().toString();
     Customer customer = new Customer(id, "foo@example.com", "Johanna", null);
 
@@ -74,11 +74,11 @@ public void changeName() throws InterruptedException {
 
 
     Assertions.assertEquals(HttpStatus.OK, resUpdate.getStatusCode());
-    Assertions.assertEquals("Katarina", getCustomerById(id).name);
+    Assertions.assertEquals("Katarina", getCustomerById(id).name());
   }
 
   @Test
-  public void changeAddress() throws InterruptedException {
+  public void changeAddress() {
     String id = UUID.randomUUID().toString();
     Customer customer = new Customer(id, "foo@example.com", "Johanna", null);
 
@@ -103,12 +103,12 @@ public void changeAddress() throws InterruptedException {
 
 
     Assertions.assertEquals(HttpStatus.OK, resUpdate.getStatusCode());
-    Assertions.assertEquals("Elm st. 5", getCustomerById(id).address.street);
+    Assertions.assertEquals("Elm st. 5", getCustomerById(id).address().street());
   }
 
 
   @Test
-  public void findByName() throws Exception {
+  public void findByName() {
     String id = UUID.randomUUID().toString();
     Customer customer = new Customer(id, "foo@example.com", "Foo", null);
     ResponseEntity<String> response =
@@ -131,13 +131,13 @@ public void findByName() throws Exception {
                     .retrieve()
                     .bodyToMono(CustomerView.class)
                     .block(timeout)
-                    .name,
+                    .name(),
             new IsEqual("Foo")
         );
   }
 
   @Test
-  public void findByEmail() throws Exception {
+  public void findByEmail() {
     String id = UUID.randomUUID().toString();
     Customer customer = new Customer(id, "bar@example.com", "Bar", null);
     ResponseEntity<String> response =
@@ -160,7 +160,7 @@ public void findByEmail() throws Exception {
                     .retrieve()
                     .bodyToMono(CustomerView.class)
                     .block(timeout)
-                    .name,
+                    .name(),
             new IsEqual("Bar")
         );
   }
diff --git a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/Address.java b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/Address.java
index 2edb2e73d9..fbee3c8080 100644
--- a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/Address.java
+++ b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/Address.java
@@ -3,16 +3,4 @@
  * Copyright (C) 2009-2022 Lightbend Inc. <https://www.lightbend.com>
  */
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonProperty;
-
-public class Address {
-  public String street;
-  public String city;
-
-  @JsonCreator
-  public Address(@JsonProperty("street") String street, @JsonProperty("city") String city) {
-    this.street = street;
-    this.city = city;
-  }
-}
+public record Address(String street, String city) {}
diff --git a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/AddressChanged.java b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/AddressChanged.java
deleted file mode 100644
index b03e124948..0000000000
--- a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/AddressChanged.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package customer.api;
-
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonProperty;
-
-public class AddressChanged implements CustomerEvent  {
-
-  final public Address address;
-
-
-  @JsonCreator
-  public AddressChanged(@JsonProperty Address address) {
-    this.address = address;
-  }
-}
diff --git a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/Customer.java b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/Customer.java
index ce59838338..5476a6de3d 100644
--- a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/Customer.java
+++ b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/Customer.java
@@ -3,30 +3,7 @@
  * Copyright (C) 2009-2022 Lightbend Inc. <https://www.lightbend.com>
  */
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonProperty;
-
-public class Customer {
-  public String customerId;
-  public String email;
-  public String name;
-  public Address address;
-
-  // TODO: remove JsonCreator and JsonProperty
-  // this should not be needed and it's not when running the application
-  // however, the integration tests seems to need it. 
-  // Probably related to how the compiler is configured for the tests?
-  @JsonCreator
-  public Customer(@JsonProperty("customerId") String customerId,
-                  @JsonProperty("email") String email,
-                  @JsonProperty("name") String name,
-                  @JsonProperty("address") Address address) {
-    this.customerId = customerId;
-    this.email = email;
-    this.name = name;
-    this.address = address;
-  }
-
+public record Customer(String customerId, String email, String name, Address address) {
 
   public Customer withName(String newName) {
     return new Customer(customerId, email, newName, address);
diff --git a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerCreated.java b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerCreated.java
deleted file mode 100644
index 2865f859f8..0000000000
--- a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerCreated.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package customer.api;
-
-import com.fasterxml.jackson.annotation.JsonCreator;
-
-public class CustomerCreated implements CustomerEvent {
-
-  final public String email;
-  final public String name;
-  final public Address address;
-
-  @JsonCreator
-  public CustomerCreated(String email, String name, Address address) {
-    this.email = email;
-    this.name = name;
-    this.address = address;{}
-  }
-}
diff --git a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEntity.java b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEntity.java
index 07c33dbe20..a286e36c82 100644
--- a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEntity.java
+++ b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEntity.java
@@ -18,11 +18,12 @@
 
 import kalix.javasdk.eventsourcedentity.EventSourcedEntity;
 import kalix.javasdk.eventsourcedentity.EventSourcedEntityContext;
-import kalix.javasdk.valueentity.ValueEntity;
 import kalix.springsdk.annotations.Entity;
 import kalix.springsdk.annotations.EventHandler;
 import org.springframework.web.bind.annotation.*;
 
+import static customer.api.CustomerEvent.*;
+
 @Entity(entityKey = "id", entityType = "customer")
 @RequestMapping("/customer/{id}")
 public class CustomerEntity extends EventSourcedEntity<Customer> {
@@ -41,13 +42,13 @@ public Effect<Customer> getCustomer() {
   @PostMapping("/create")
   public Effect<String> create(@RequestBody Customer customer) {
     return effects()
-        .emitEvent(new CustomerCreated(customer.email, customer.name, customer.address))
+        .emitEvent(new CustomerCreated(customer.email(), customer.name(), customer.address()))
         .thenReply(__ -> "OK");
   }
 
   @EventHandler
   public Customer onEvent(CustomerCreated created) {
-    return new Customer(entityId, created.email, created.name, created.address);
+    return new Customer(entityId, created.email(), created.name(), created.address());
   }
 
 
@@ -61,7 +62,7 @@ public Effect<String> changeName(@PathVariable String newName) {
 
   @EventHandler
   public Customer onEvent(NameChanged nameChanged) {
-    return currentState().withName(nameChanged.newName);
+    return currentState().withName(nameChanged.newName());
   }
 
 
@@ -73,7 +74,7 @@ public Effect<String> changeAddress(@RequestBody Address newAddress) {
   }
 
   @EventHandler
-  public Customer onEvents(AddressChanged addressChanged){
-    return currentState().withAddress(addressChanged.address);
+  public Customer onEvents(AddressChanged addressChanged) {
+    return currentState().withAddress(addressChanged.address());
   }
 }
diff --git a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java
index e71b358edf..06894a61f2 100644
--- a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java
+++ b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java
@@ -4,6 +4,8 @@
 import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 
+import static customer.api.CustomerEvent.*;
+
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
 @JsonSubTypes(
     {
@@ -11,5 +13,14 @@
         @JsonSubTypes.Type(value = NameChanged.class, name = "name-changed"),
         @JsonSubTypes.Type(value = AddressChanged.class, name = "address-changed")
     })
-public interface CustomerEvent {
+public sealed interface CustomerEvent {
+
+  record CustomerCreated(String email, String name, Address address) implements CustomerEvent {
+  }
+
+  record NameChanged(String newName) implements CustomerEvent {
+  }
+
+  record AddressChanged(Address address) implements CustomerEvent {
+  }
 }
diff --git a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/NameChanged.java b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/NameChanged.java
deleted file mode 100644
index 76ad15a08b..0000000000
--- a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/NameChanged.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package customer.api;
-
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonProperty;
-
-public class NameChanged implements CustomerEvent {
-
-   final public String newName;
-
-  @JsonCreator
-  public NameChanged(@JsonProperty String newName) {
-    this.newName = newName;
-  }
-}
diff --git a/samples/spring-eventsourced-customer-registry/src/main/java/customer/view/CustomerView.java b/samples/spring-eventsourced-customer-registry/src/main/java/customer/view/CustomerView.java
index c76186531a..24acda4be4 100644
--- a/samples/spring-eventsourced-customer-registry/src/main/java/customer/view/CustomerView.java
+++ b/samples/spring-eventsourced-customer-registry/src/main/java/customer/view/CustomerView.java
@@ -1,30 +1,20 @@
 package customer.view;
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonProperty;
-import customer.api.*;
+import customer.api.Address;
+import customer.api.CustomerEvent;
 
 import java.util.Optional;
 
-public class CustomerView {
-  final public String email;
-  final public String name;
-  final public Address address;
-
-  @JsonCreator
-  public CustomerView(@JsonProperty("email") String email, @JsonProperty("name") String name, @JsonProperty("address") Address address) {
-    this.email = email;
-    this.name = name;
-    this.address = address;
-  }
+import static customer.api.CustomerEvent.*;
 
+public record CustomerView(String email, String name, Address address) {
 
   public CustomerView withName(String newName) {
-    return new CustomerView( email, newName, address);
+    return new CustomerView(email, newName, address);
   }
 
   public CustomerView withAddress(Address newAddress) {
-    return new CustomerView( email, name, newAddress);
+    return new CustomerView(email, name, newAddress);
   }
 
   /**
@@ -35,18 +25,15 @@ public static Optional<CustomerView> onEvent(CustomerView state, CustomerEvent e
 
     if (state == null) {
       // the only event we can receive when state is null is the CustomerCreated
-      if (event instanceof CustomerCreated) {
-        CustomerCreated created = (CustomerCreated) event;
-        return Optional.of(new CustomerView(created.email, created.name, created.address));
+      if (event instanceof CustomerCreated created) {
+        return Optional.of(new CustomerView(created.email(), created.name(), created.address()));
       }
     } else {
       // when not null, we can receive the other events
-      if (event instanceof NameChanged) {
-        NameChanged nameChanged = (NameChanged) event;
-        return Optional.of(state.withName(nameChanged.newName));
-      } else if (event instanceof AddressChanged) {
-        AddressChanged addressChanged = (AddressChanged) event;
-        return Optional.of(state.withAddress(addressChanged.address));
+      if (event instanceof NameChanged nameChanged) {
+        return Optional.of(state.withName(nameChanged.newName()));
+      } else if (event instanceof AddressChanged addressChanged) {
+        return Optional.of(state.withAddress(addressChanged.address()));
       }
     }
 
@@ -54,6 +41,4 @@ public static Optional<CustomerView> onEvent(CustomerView state, CustomerEvent e
     // That case won't happen as the delivery ordering is guaranteed, but we need to keep the compiler happy
     return Optional.empty();
   }
-
-
 }
diff --git a/samples/spring-eventsourced-customer-registry/src/test/java/customer/api/CustomerEntityTest.java b/samples/spring-eventsourced-customer-registry/src/test/java/customer/api/CustomerEntityTest.java
index 37c8ffaeee..5a9678dcfd 100644
--- a/samples/spring-eventsourced-customer-registry/src/test/java/customer/api/CustomerEntityTest.java
+++ b/samples/spring-eventsourced-customer-registry/src/test/java/customer/api/CustomerEntityTest.java
@@ -4,6 +4,7 @@
 import kalix.springsdk.testkit.EventSourcedTestKit;
 import org.junit.jupiter.api.Test;
 
+import static customer.api.CustomerEvent.*;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 public class CustomerEntityTest {
@@ -25,7 +26,7 @@ public void testCustomerNameChange() {
     {
       EventSourcedResult<String> result = testKit.call(e -> e.changeName("FooBar"));
       assertEquals("OK", result.getReply());
-      assertEquals("FooBar", testKit.getState().name);
+      assertEquals("FooBar", testKit.getState().name());
       result.getNextEventOfType(NameChanged.class);
     }
 
@@ -45,8 +46,8 @@ public void testCustomerAddressChange() {
       Address newAddress = new Address("Sesame Street", "Sesame City");
       EventSourcedResult<String> result = testKit.call(e -> e.changeAddress(newAddress));
       assertEquals("OK", result.getReply());
-      assertEquals("Sesame Street", testKit.getState().address.street);
-      assertEquals("Sesame City", testKit.getState().address.city);
+      assertEquals("Sesame Street", testKit.getState().address().street());
+      assertEquals("Sesame City", testKit.getState().address().city());
       result.getNextEventOfType(AddressChanged.class);
     }
 

From be8e5b438d7904d496457a3441b6d1e53b74cbf6 Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Thu, 6 Oct 2022 15:31:19 +0200
Subject: [PATCH 02/13] fix: java 17 for maven archetypes

---
 .../src/main/resources/archetype-resources/pom.xml            | 4 ++--
 .../src/main/resources/archetype-resources/pom.xml            | 4 ++--
 .../src/main/resources/archetype-resources/pom.xml            | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/maven-java/kalix-maven-archetype-event-sourced-entity/src/main/resources/archetype-resources/pom.xml b/maven-java/kalix-maven-archetype-event-sourced-entity/src/main/resources/archetype-resources/pom.xml
index b7ff0f9255..6218a056b8 100644
--- a/maven-java/kalix-maven-archetype-event-sourced-entity/src/main/resources/archetype-resources/pom.xml
+++ b/maven-java/kalix-maven-archetype-event-sourced-entity/src/main/resources/archetype-resources/pom.xml
@@ -17,7 +17,7 @@
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>${package}.Main</mainClass>
 
-    <jdk.target>11</jdk.target>
+    <jdk.target>17</jdk.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
     <kalix-sdk.version>@project.version@</kalix-sdk.version>
@@ -122,7 +122,7 @@
               <name>${D}{dockerImage}:%l</name>
               <build>
                 <!-- Base Docker image which contains jre-->
-                <from>docker.io/library/adoptopenjdk:${D}{jdk.target}-jre-hotspot</from>
+                <from>docker.io/library/eclipse-temurin:${D}{jdk.target}-alpine</from>
                 <createImageOptions>
                   <platform>linux/amd64</platform>
                 </createImageOptions>
diff --git a/maven-java/kalix-maven-archetype-value-entity/src/main/resources/archetype-resources/pom.xml b/maven-java/kalix-maven-archetype-value-entity/src/main/resources/archetype-resources/pom.xml
index b7ff0f9255..6218a056b8 100644
--- a/maven-java/kalix-maven-archetype-value-entity/src/main/resources/archetype-resources/pom.xml
+++ b/maven-java/kalix-maven-archetype-value-entity/src/main/resources/archetype-resources/pom.xml
@@ -17,7 +17,7 @@
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>${package}.Main</mainClass>
 
-    <jdk.target>11</jdk.target>
+    <jdk.target>17</jdk.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
     <kalix-sdk.version>@project.version@</kalix-sdk.version>
@@ -122,7 +122,7 @@
               <name>${D}{dockerImage}:%l</name>
               <build>
                 <!-- Base Docker image which contains jre-->
-                <from>docker.io/library/adoptopenjdk:${D}{jdk.target}-jre-hotspot</from>
+                <from>docker.io/library/eclipse-temurin:${D}{jdk.target}-alpine</from>
                 <createImageOptions>
                   <platform>linux/amd64</platform>
                 </createImageOptions>
diff --git a/maven-java/kalix-spring-boot-archetype/src/main/resources/archetype-resources/pom.xml b/maven-java/kalix-spring-boot-archetype/src/main/resources/archetype-resources/pom.xml
index fdc13f9a35..3e5b812540 100644
--- a/maven-java/kalix-spring-boot-archetype/src/main/resources/archetype-resources/pom.xml
+++ b/maven-java/kalix-spring-boot-archetype/src/main/resources/archetype-resources/pom.xml
@@ -16,7 +16,7 @@
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>${package}.Main</mainClass>
 
-    <jdk.target>11</jdk.target>
+    <jdk.target>17</jdk.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
     <kalix-sdk.version>@project.version@</kalix-sdk.version>
@@ -91,7 +91,7 @@
               <name>${dockerImage}:%l</name>
               <build>
                 <!-- Base Docker image which contains jre-->
-                <from>docker.io/library/adoptopenjdk:${jdk.target}-jre-hotspot</from>
+                <from>docker.io/library/eclipse-temurin:${D}{jdk.target}-alpine</from>
                 <createImageOptions>
                   <platform>linux/amd64</platform>
                 </createImageOptions>

From 0f2f48cae941b4f89b0c170b62ee171a01c74a11 Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Thu, 6 Oct 2022 16:37:43 +0200
Subject: [PATCH 03/13] fix: java 17 for kalix action example

---
 .../pom.xml                                   |  9 +++++----
 .../main/java/customer/api/CustomerEvent.java | 16 +++++++++------
 .../test/java/customer/api/JacksonTest.java   | 20 +++++++++++++++++++
 samples/spring-fibonacci-action/pom.xml       |  4 ++--
 .../FibonacciActionIntegrationTest.java       | 10 +++++-----
 .../example/fibonacci/FibonacciAction.java    |  2 +-
 .../fibonacci/LimitedFibonacciAction.java     |  4 ++--
 .../java/com/example/fibonacci/Number.java    | 12 +----------
 .../fibonacci/FibonacciActionTest.java        |  2 +-
 9 files changed, 47 insertions(+), 32 deletions(-)
 create mode 100644 samples/spring-eventsourced-customer-registry/src/test/java/customer/api/JacksonTest.java

diff --git a/samples/spring-eventsourced-customer-registry/pom.xml b/samples/spring-eventsourced-customer-registry/pom.xml
index 5c2264ec82..8e8a007104 100644
--- a/samples/spring-eventsourced-customer-registry/pom.xml
+++ b/samples/spring-eventsourced-customer-registry/pom.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>com.example</groupId>
@@ -11,7 +12,7 @@
   <properties>
 
     <!-- TODO Update to your own Docker repository or Docker Hub scope -->
-    <dockerImage>my-docker-repo/${project.artifactId}</dockerImage>
+    <dockerImage>aludwiko/${project.artifactId}</dockerImage>
     <dockerTag>${project.version}-${build.timestamp}</dockerTag>
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>customer.Main</mainClass>
@@ -307,12 +308,12 @@
     <dependency>
       <groupId>io.kalix</groupId>
       <artifactId>kalix-spring-sdk</artifactId>
-      <version>${kalix-sdk.version}</version>
+      <version>1.0.8-14-fedc8579-dev-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>io.kalix</groupId>
       <artifactId>kalix-spring-sdk-testkit</artifactId>
-      <version>${kalix-sdk.version}</version>
+      <version>1.0.8-14-fedc8579-dev-SNAPSHOT</version>
       <scope>test</scope>
     </dependency>
 
diff --git a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java
index 06894a61f2..7c75860fe4 100644
--- a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java
+++ b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java
@@ -3,24 +3,28 @@
 
 import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeName;
 
 import static customer.api.CustomerEvent.*;
 
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
-@JsonSubTypes(
-    {
-        @JsonSubTypes.Type(value = CustomerCreated.class, name = "customer-created"),
-        @JsonSubTypes.Type(value = NameChanged.class, name = "name-changed"),
-        @JsonSubTypes.Type(value = AddressChanged.class, name = "address-changed")
-    })
+//@JsonSubTypes(
+//    {
+//        @JsonSubTypes.Type(value = CustomerCreated.class, name = "customer-created"),
+//        @JsonSubTypes.Type(value = NameChanged.class, name = "name-changed"),
+//        @JsonSubTypes.Type(value = AddressChanged.class, name = "address-changed")
+//    })
 public sealed interface CustomerEvent {
 
+  @JsonTypeName("customer-created")
   record CustomerCreated(String email, String name, Address address) implements CustomerEvent {
   }
 
+  @JsonTypeName("name-changed")
   record NameChanged(String newName) implements CustomerEvent {
   }
 
+  @JsonTypeName("address-changed")
   record AddressChanged(Address address) implements CustomerEvent {
   }
 }
diff --git a/samples/spring-eventsourced-customer-registry/src/test/java/customer/api/JacksonTest.java b/samples/spring-eventsourced-customer-registry/src/test/java/customer/api/JacksonTest.java
new file mode 100644
index 0000000000..241fa3c3c2
--- /dev/null
+++ b/samples/spring-eventsourced-customer-registry/src/test/java/customer/api/JacksonTest.java
@@ -0,0 +1,20 @@
+package customer.api;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+
+public class JacksonTest {
+
+  @Test
+  public void testCustomerAddressChange() throws JsonProcessingException {
+    CustomerEvent.CustomerCreated customerCreated = new CustomerEvent.CustomerCreated("email", "name", new Address("street", "some city"));
+    ObjectMapper mapper = new ObjectMapper();
+    String valueAsString = mapper.writeValueAsString(customerCreated);
+    System.out.println(valueAsString);
+
+    CustomerEvent customerEvent = mapper.readValue(valueAsString, CustomerEvent.class);
+
+    System.out.println(customerEvent);
+  }
+}
diff --git a/samples/spring-fibonacci-action/pom.xml b/samples/spring-fibonacci-action/pom.xml
index 957390d26d..6c7a8484a5 100644
--- a/samples/spring-fibonacci-action/pom.xml
+++ b/samples/spring-fibonacci-action/pom.xml
@@ -16,7 +16,7 @@
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>com.example.Main</mainClass>
 
-    <jdk.target>11</jdk.target>
+    <jdk.target>17</jdk.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
     <kalix-sdk.version>1.0.8</kalix-sdk.version>
@@ -123,7 +123,7 @@
               <name>${dockerImage}:%l</name>
               <build>
                 <!-- Base Docker image which contains jre-->
-                <from>docker.io/library/adoptopenjdk:${jdk.target}-jre-hotspot</from>
+                <from>docker.io/library/eclipse-temurin:${jdk.target}-alpine</from>
                 <createImageOptions>
                   <platform>linux/amd64</platform>
                 </createImageOptions>
diff --git a/samples/spring-fibonacci-action/src/it/java/com/example/fibonacci/FibonacciActionIntegrationTest.java b/samples/spring-fibonacci-action/src/it/java/com/example/fibonacci/FibonacciActionIntegrationTest.java
index bc355dd83f..ccfd9fd24d 100644
--- a/samples/spring-fibonacci-action/src/it/java/com/example/fibonacci/FibonacciActionIntegrationTest.java
+++ b/samples/spring-fibonacci-action/src/it/java/com/example/fibonacci/FibonacciActionIntegrationTest.java
@@ -30,33 +30,33 @@ public class FibonacciActionIntegrationTest extends KalixIntegrationTestKitSuppo
   private WebClient webClient;
 
   @Test
-  public void calculateNextNumber() throws Exception {
+  public void calculateNextNumber() {
 
     Mono<Number> response =
         webClient.get()
             .uri("/fibonacci/5/next")
             .retrieve().bodyToMono(Number.class);
 
-    long next = response.block(Duration.of(5, SECONDS)).value;
+    long next = response.block(Duration.of(5, SECONDS)).value();
     Assertions.assertEquals(8, next);
 
   }
 
   @Test
-  public void calculateNextNumberWithLimitedFibo() throws Exception {
+  public void calculateNextNumberWithLimitedFibo() {
 
     Mono<Number> response =
             webClient.get()
                     .uri("/limitedfibonacci/5/next")
                     .retrieve().bodyToMono(Number.class);
 
-    long next = response.block(Duration.of(5, SECONDS)).value;
+    long next = response.block(Duration.of(5, SECONDS)).value();
     Assertions.assertEquals(8, next);
 
   }
 
   @Test
-  public void wrongNumberReturnsError() throws Exception {
+  public void wrongNumberReturnsError() {
     try {
 
 
diff --git a/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/FibonacciAction.java b/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/FibonacciAction.java
index 75ddb4f73f..3341826fe8 100644
--- a/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/FibonacciAction.java
+++ b/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/FibonacciAction.java
@@ -28,7 +28,7 @@ public Effect<Number> nextNumber(@PathVariable Long number) {
 
   @PostMapping("/next")
   public Effect<Number> nextNumber(@RequestBody Number number) {
-    long num =  number.value;
+    long num =  number.value();
     if (isFibonacci(num)) {
       return effects().reply(new Number(nextFib(num)));
     } else {
diff --git a/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/LimitedFibonacciAction.java b/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/LimitedFibonacciAction.java
index d72448c557..d09c419200 100644
--- a/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/LimitedFibonacciAction.java
+++ b/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/LimitedFibonacciAction.java
@@ -37,10 +37,10 @@ public Effect<Number> nextNumber(@PathVariable Long number) {
 
     @PostMapping("/next")
     public Effect<Number> nextNumber(@RequestBody Number number) {
-        if (number.value < 0 || number.value > 10000) {
+        if (number.value() < 0 || number.value() > 10000) {
             return effects().error("Only numbers between 0 and 10k are allowed", Status.Code.INVALID_ARGUMENT);
         } else {
-            logger.info("Executing POST call to real /fibonacci = " + number.value);
+            logger.info("Executing POST call to real /fibonacci = " + number.value());
             var serviceCall = kalixClient.post("/fibonacci/next", number, Number.class).execute();
 
             return effects().asyncReply(serviceCall);
diff --git a/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/Number.java b/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/Number.java
index 7ff2db5e91..1a49904bb4 100644
--- a/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/Number.java
+++ b/samples/spring-fibonacci-action/src/main/java/com/example/fibonacci/Number.java
@@ -1,14 +1,4 @@
 package com.example.fibonacci;
- 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
-public class Number {
-
-  public final long value;
-
-  @JsonCreator
-  public Number(@JsonProperty("value") long value) {
-    this.value = value;
-  }
+public record Number(long value) {
 }
diff --git a/samples/spring-fibonacci-action/src/test/java/com/example/fibonacci/FibonacciActionTest.java b/samples/spring-fibonacci-action/src/test/java/com/example/fibonacci/FibonacciActionTest.java
index f262a7c4f0..b9f4e271fa 100644
--- a/samples/spring-fibonacci-action/src/test/java/com/example/fibonacci/FibonacciActionTest.java
+++ b/samples/spring-fibonacci-action/src/test/java/com/example/fibonacci/FibonacciActionTest.java
@@ -14,7 +14,7 @@ public void testNextFib() {
     ActionTestkit<FibonacciAction> testkit = ActionTestkit.of(FibonacciAction::new);
     ActionResult<Number> result = testkit.call(a -> a.nextNumber(3L));
     assertTrue(result.isReply());
-    assertEquals(5L, result.getReply().value);
+    assertEquals(5L, result.getReply().value());
   }
 
   @Test

From 5578d1fdfdd50dab40745cbe9cbd11b1e9a817c9 Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Thu, 6 Oct 2022 17:04:07 +0200
Subject: [PATCH 04/13] fix: java 17 for event sourced counter sample

---
 samples/spring-eventsourced-counter/README.md |  6 ++--
 samples/spring-eventsourced-counter/pom.xml   |  4 +--
 .../src/main/java/com/example/Counter.java    |  7 +++--
 .../main/java/com/example/CounterEvent.java   | 10 +++++++
 .../main/java/com/example/ValueIncreased.java | 30 -------------------
 .../java/com/example/ValueMultiplied.java     | 29 ------------------
 .../test/java/com/example/CounterTest.java    |  3 +-
 samples/spring-fibonacci-action/pom.xml       |  6 ++--
 8 files changed, 25 insertions(+), 70 deletions(-)
 create mode 100644 samples/spring-eventsourced-counter/src/main/java/com/example/CounterEvent.java
 delete mode 100644 samples/spring-eventsourced-counter/src/main/java/com/example/ValueIncreased.java
 delete mode 100644 samples/spring-eventsourced-counter/src/main/java/com/example/ValueMultiplied.java

diff --git a/samples/spring-eventsourced-counter/README.md b/samples/spring-eventsourced-counter/README.md
index f50749a93d..e031d7ccaa 100644
--- a/samples/spring-eventsourced-counter/README.md
+++ b/samples/spring-eventsourced-counter/README.md
@@ -38,17 +38,17 @@ With both the proxy and your application running, once you have defined endpoint
 
 - increase (or create) a counter named `hello` with value `10`
 ```shell
-curl -i -XPOST localhost:9000/counter/hello/increase/10
+curl -XPOST localhost:9000/counter/hello/increase/10
 ```
 
 - retrieve the value of a counter named `hello`
 ```shell
-curl -i -XGET localhost:9000/counter/hello
+curl -XGET localhost:9000/counter/hello
 ```
 
 - multiply existing counter named `hello` by value `5`
 ```shell
-curl -i -XPOST localhost:9000/counter/hello/multiply/5
+curl -XPOST localhost:9000/counter/hello/multiply/5
 ```
 
 ### Deploy
diff --git a/samples/spring-eventsourced-counter/pom.xml b/samples/spring-eventsourced-counter/pom.xml
index 1b2a97f9dd..fa5e65b0f5 100644
--- a/samples/spring-eventsourced-counter/pom.xml
+++ b/samples/spring-eventsourced-counter/pom.xml
@@ -16,7 +16,7 @@
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>com.example.Main</mainClass>
 
-    <jdk.target>11</jdk.target>
+    <jdk.target>17</jdk.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
     <kalix-sdk.version>1.0.8</kalix-sdk.version>
@@ -91,7 +91,7 @@
               <name>${dockerImage}:%l</name>
               <build>
                 <!-- Base Docker image which contains jre-->
-                <from>docker.io/library/adoptopenjdk:${jdk.target}-jre-hotspot</from>
+                <from>docker.io/library/eclipse-temurin:${jdk.target}-alpine</from>
                 <createImageOptions>
                   <platform>linux/amd64</platform>
                 </createImageOptions>
diff --git a/samples/spring-eventsourced-counter/src/main/java/com/example/Counter.java b/samples/spring-eventsourced-counter/src/main/java/com/example/Counter.java
index 7187844a40..ce3b5d2b6c 100644
--- a/samples/spring-eventsourced-counter/src/main/java/com/example/Counter.java
+++ b/samples/spring-eventsourced-counter/src/main/java/com/example/Counter.java
@@ -26,6 +26,9 @@
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 
+import static com.example.CounterEvent.ValueIncreased;
+import static com.example.CounterEvent.ValueMultiplied;
+
 @Entity(entityKey = "id", entityType = "counter")
 @RequestMapping("/counter/{id}")
 public class Counter extends EventSourcedEntity<Integer> {
@@ -58,12 +61,12 @@ public Effect<String> multiply(@PathVariable Integer value) {
 
     @EventHandler
     public Integer handleIncrease(ValueIncreased value) {
-        return currentState() + value.value;
+        return currentState() + value.value();
     }
 
     @EventHandler
     public Integer handleMultiply(ValueMultiplied value) {
-        return currentState() * value.value;
+        return currentState() * value.value();
     }
 }
 
diff --git a/samples/spring-eventsourced-counter/src/main/java/com/example/CounterEvent.java b/samples/spring-eventsourced-counter/src/main/java/com/example/CounterEvent.java
new file mode 100644
index 0000000000..2a851425dd
--- /dev/null
+++ b/samples/spring-eventsourced-counter/src/main/java/com/example/CounterEvent.java
@@ -0,0 +1,10 @@
+package com.example;
+
+public sealed interface CounterEvent {
+
+  record ValueIncreased(int value) implements CounterEvent {
+  }
+
+  record ValueMultiplied(int value) implements CounterEvent {
+  }
+}
diff --git a/samples/spring-eventsourced-counter/src/main/java/com/example/ValueIncreased.java b/samples/spring-eventsourced-counter/src/main/java/com/example/ValueIncreased.java
deleted file mode 100644
index abac9507ae..0000000000
--- a/samples/spring-eventsourced-counter/src/main/java/com/example/ValueIncreased.java
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright 2021 Lightbend Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.example;
-
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonProperty;
-
-public class ValueIncreased {
-
-  public final int value;
-
-  @JsonCreator
-  public ValueIncreased(@JsonProperty int value) {
-    this.value = value;
-  }
-}
diff --git a/samples/spring-eventsourced-counter/src/main/java/com/example/ValueMultiplied.java b/samples/spring-eventsourced-counter/src/main/java/com/example/ValueMultiplied.java
deleted file mode 100644
index d464626764..0000000000
--- a/samples/spring-eventsourced-counter/src/main/java/com/example/ValueMultiplied.java
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright 2021 Lightbend Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.example;
-
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonProperty;
-
-public class ValueMultiplied {
-  public final int value;
-
-  @JsonCreator
-  public ValueMultiplied(@JsonProperty Integer value) {
-    this.value = value;
-  }
-}
diff --git a/samples/spring-eventsourced-counter/src/test/java/com/example/CounterTest.java b/samples/spring-eventsourced-counter/src/test/java/com/example/CounterTest.java
index d6ac5bd0df..0714c64583 100644
--- a/samples/spring-eventsourced-counter/src/test/java/com/example/CounterTest.java
+++ b/samples/spring-eventsourced-counter/src/test/java/com/example/CounterTest.java
@@ -2,9 +2,10 @@
 
 import kalix.javasdk.testkit.EventSourcedResult;
 import kalix.springsdk.testkit.EventSourcedTestKit;
-import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
+import static com.example.CounterEvent.ValueIncreased;
+import static com.example.CounterEvent.ValueMultiplied;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
diff --git a/samples/spring-fibonacci-action/pom.xml b/samples/spring-fibonacci-action/pom.xml
index 6c7a8484a5..d42fda1658 100644
--- a/samples/spring-fibonacci-action/pom.xml
+++ b/samples/spring-fibonacci-action/pom.xml
@@ -11,7 +11,7 @@
   <properties>
 
     <!-- TODO Update to your own Docker repository or Docker Hub scope -->
-    <dockerImage>my-docker-repo/${project.artifactId}</dockerImage>
+    <dockerImage>aludwiko/${project.artifactId}</dockerImage>
     <dockerTag>${project.version}-${build.timestamp}</dockerTag>
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>com.example.Main</mainClass>
@@ -307,12 +307,12 @@
     <dependency>
       <groupId>io.kalix</groupId>
       <artifactId>kalix-spring-sdk</artifactId>
-      <version>${kalix-sdk.version}</version>
+      <version>1.0.8-14-fedc8579-dev-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>io.kalix</groupId>
       <artifactId>kalix-spring-sdk-testkit</artifactId>
-      <version>${kalix-sdk.version}</version>
+      <version>1.0.8-14-fedc8579-dev-SNAPSHOT</version>
       <scope>test</scope>
     </dependency>
 

From 3d25f4067c9bf2080468852f5f1649ddd814e120 Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Fri, 7 Oct 2022 09:16:56 +0200
Subject: [PATCH 05/13] fix: java 17 for views sample

---
 .../pom.xml                                   |  4 +--
 .../customer/api/CustomerIntegrationTest.java | 10 +++----
 .../src/main/java/customer/api/Address.java   | 13 +--------
 .../src/main/java/customer/api/Customer.java  | 28 ++++---------------
 .../java/customer/api/CustomerEntity.java     | 10 +++----
 .../java/customer/api/CustomerEntityTest.java |  6 ++--
 6 files changed, 21 insertions(+), 50 deletions(-)

diff --git a/samples/spring-customer-registry-views-quickstart/pom.xml b/samples/spring-customer-registry-views-quickstart/pom.xml
index fd94004a5b..5c2264ec82 100644
--- a/samples/spring-customer-registry-views-quickstart/pom.xml
+++ b/samples/spring-customer-registry-views-quickstart/pom.xml
@@ -16,7 +16,7 @@
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>customer.Main</mainClass>
 
-    <jdk.target>11</jdk.target>
+    <jdk.target>17</jdk.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
     <kalix-sdk.version>1.0.8</kalix-sdk.version>
@@ -123,7 +123,7 @@
               <name>${dockerImage}:%l</name>
               <build>
                 <!-- Base Docker image which contains jre-->
-                <from>docker.io/library/adoptopenjdk:${jdk.target}-jre-hotspot</from>
+                <from>docker.io/library/eclipse-temurin:${jdk.target}-alpine</from>
                 <createImageOptions>
                   <platform>linux/amd64</platform>
                 </createImageOptions>
diff --git a/samples/spring-customer-registry-views-quickstart/src/it/java/customer/api/CustomerIntegrationTest.java b/samples/spring-customer-registry-views-quickstart/src/it/java/customer/api/CustomerIntegrationTest.java
index 703aa2d8bb..0e0e65a8ad 100644
--- a/samples/spring-customer-registry-views-quickstart/src/it/java/customer/api/CustomerIntegrationTest.java
+++ b/samples/spring-customer-registry-views-quickstart/src/it/java/customer/api/CustomerIntegrationTest.java
@@ -46,7 +46,7 @@ public void create() throws InterruptedException {
             .block(timeout);
 
     Assertions.assertEquals(HttpStatus.OK, response.getStatusCode());
-    Assertions.assertEquals("Johanna", getCustomerById(id).name);
+    Assertions.assertEquals("Johanna", getCustomerById(id).name());
   }
 
   @Test
@@ -73,7 +73,7 @@ public void changeName() throws InterruptedException {
 
 
     Assertions.assertEquals(HttpStatus.OK, resUpdate.getStatusCode());
-    Assertions.assertEquals("Katarina", getCustomerById(id).name);
+    Assertions.assertEquals("Katarina", getCustomerById(id).name());
   }
 
   @Test
@@ -102,7 +102,7 @@ public void changeAddress() throws InterruptedException {
 
 
     Assertions.assertEquals(HttpStatus.OK, resUpdate.getStatusCode());
-    Assertions.assertEquals("Elm st. 5", getCustomerById(id).address.street);
+    Assertions.assertEquals("Elm st. 5", getCustomerById(id).address().street());
   }
 
 
@@ -131,7 +131,7 @@ public void findByName() throws Exception {
                     .retrieve()
                     .bodyToMono(Customer.class)
                     .block(timeout)
-                    .name,
+                    .name(),
             new IsEqual("Foo")
         );
   }
@@ -160,7 +160,7 @@ public void findByEmail() throws Exception {
                     .retrieve()
                     .bodyToMono(Customer.class)
                     .block(timeout)
-                    .name,
+                    .name(),
             new IsEqual("Bar")
         );
   }
diff --git a/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/Address.java b/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/Address.java
index 2edb2e73d9..7a828e9a6f 100644
--- a/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/Address.java
+++ b/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/Address.java
@@ -3,16 +3,5 @@
  * Copyright (C) 2009-2022 Lightbend Inc. <https://www.lightbend.com>
  */
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonProperty;
-
-public class Address {
-  public String street;
-  public String city;
-
-  @JsonCreator
-  public Address(@JsonProperty("street") String street, @JsonProperty("city") String city) {
-    this.street = street;
-    this.city = city;
-  }
+public record Address(String street, String city) {
 }
diff --git a/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/Customer.java b/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/Customer.java
index 15142a10e2..ab9480f735 100644
--- a/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/Customer.java
+++ b/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/Customer.java
@@ -3,29 +3,13 @@
  * Copyright (C) 2009-2022 Lightbend Inc. <https://www.lightbend.com>
  */
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonProperty;
+public record Customer(String customerId, String email, String name, Address address) {
 
-public class Customer {
-  public String customerId;
-  public String email;
-  public String name;
-  public Address address;
-
-  // TODO: remove JsonCreator and JsonProperty
-  // this should not be needed and it's not when running the application
-  // however, the integration tests seems to need it. 
-  // Probably related to how the compiler is configured for the tests?
-  @JsonCreator
-  public Customer(@JsonProperty("customerId") String customerId,
-                  @JsonProperty("email") String email,
-                  @JsonProperty("name") String name,
-                  @JsonProperty("address") Address address) {
-    this.customerId = customerId;
-    this.email = email;
-    this.name = name;
-    this.address = address;
+  public Customer withName(String newName){
+    return new Customer(customerId, email, newName, address);
   }
 
-
+  public Customer withAddress(Address newAddress){
+    return new Customer(customerId, email, name, newAddress);
+  }
 }
diff --git a/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/CustomerEntity.java b/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/CustomerEntity.java
index f8232190f8..9cf5305c6b 100644
--- a/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/CustomerEntity.java
+++ b/samples/spring-customer-registry-views-quickstart/src/main/java/customer/api/CustomerEntity.java
@@ -36,16 +36,14 @@ public ValueEntity.Effect<Customer> getCustomer() {
 
   @PostMapping("/changeName/{newName}")
   public Effect<String> changeName(@PathVariable String newName) {
-    Customer customer = currentState();
-    customer.name = newName;
-    return effects().updateState(customer).thenReply("OK");
+    Customer updatedCustomer = currentState().withName(newName);
+    return effects().updateState(updatedCustomer).thenReply("OK");
   }
 
   @PostMapping("/changeAddress")
   public Effect<String> changeAddress(@RequestBody Address newAddress) {
-    Customer customer = currentState();
-    customer.address = newAddress;
-    return effects().updateState(customer).thenReply("OK");
+    Customer updatedCustomer = currentState().withAddress(newAddress);
+    return effects().updateState(updatedCustomer).thenReply("OK");
   }
 
 }
diff --git a/samples/spring-customer-registry-views-quickstart/src/test/java/customer/api/CustomerEntityTest.java b/samples/spring-customer-registry-views-quickstart/src/test/java/customer/api/CustomerEntityTest.java
index 163fde6ad9..efc941da97 100644
--- a/samples/spring-customer-registry-views-quickstart/src/test/java/customer/api/CustomerEntityTest.java
+++ b/samples/spring-customer-registry-views-quickstart/src/test/java/customer/api/CustomerEntityTest.java
@@ -25,7 +25,7 @@ public void testCustomerNameChange() {
     {
       ValueEntityResult<String> result = testKit.call(e -> e.changeName("FooBar"));
       assertEquals("OK", result.getReply());
-      assertEquals("FooBar", testKit.getState().name);
+      assertEquals("FooBar", testKit.getState().name());
     }
 
   }
@@ -43,8 +43,8 @@ public void testCustomerAddressChange() {
       Address newAddress = new Address("Sesame Street", "Sesame City");
       ValueEntityResult<String> result = testKit.call(e -> e.changeAddress(newAddress));
       assertEquals("OK", result.getReply());
-      assertEquals("Sesame Street", testKit.getState().address.street);
-      assertEquals("Sesame City", testKit.getState().address.city);
+      assertEquals("Sesame Street", testKit.getState().address().street());
+      assertEquals("Sesame City", testKit.getState().address().city());
     }
 
   }

From 41bde256e99a11243e055cd804225b3256fa9ad2 Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <aludwiko@users.noreply.github.com>
Date: Fri, 7 Oct 2022 10:57:53 +0200
Subject: [PATCH 06/13] Update
 samples/spring-eventsourced-customer-registry/pom.xml

Co-authored-by: Renato Cavalcanti <renato@cavalcanti.be>
---
 samples/spring-eventsourced-customer-registry/pom.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/samples/spring-eventsourced-customer-registry/pom.xml b/samples/spring-eventsourced-customer-registry/pom.xml
index 8e8a007104..d6c7e0e4ac 100644
--- a/samples/spring-eventsourced-customer-registry/pom.xml
+++ b/samples/spring-eventsourced-customer-registry/pom.xml
@@ -12,7 +12,7 @@
   <properties>
 
     <!-- TODO Update to your own Docker repository or Docker Hub scope -->
-    <dockerImage>aludwiko/${project.artifactId}</dockerImage>
+    <dockerImage>my-docker-repo/${project.artifactId}</dockerImage>
     <dockerTag>${project.version}-${build.timestamp}</dockerTag>
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>customer.Main</mainClass>

From c0884fb91d0440b330862231e70bb6745bfb4564 Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Fri, 7 Oct 2022 11:02:02 +0200
Subject: [PATCH 07/13] fixing maven poms

---
 samples/spring-eventsourced-customer-registry/pom.xml | 4 ++--
 samples/spring-fibonacci-action/pom.xml               | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/samples/spring-eventsourced-customer-registry/pom.xml b/samples/spring-eventsourced-customer-registry/pom.xml
index d6c7e0e4ac..fae1b3cec3 100644
--- a/samples/spring-eventsourced-customer-registry/pom.xml
+++ b/samples/spring-eventsourced-customer-registry/pom.xml
@@ -308,12 +308,12 @@
     <dependency>
       <groupId>io.kalix</groupId>
       <artifactId>kalix-spring-sdk</artifactId>
-      <version>1.0.8-14-fedc8579-dev-SNAPSHOT</version>
+      <version>${kalix-sdk.version}</version>
     </dependency>
     <dependency>
       <groupId>io.kalix</groupId>
       <artifactId>kalix-spring-sdk-testkit</artifactId>
-      <version>1.0.8-14-fedc8579-dev-SNAPSHOT</version>
+      <version>${kalix-sdk.version}</version>
       <scope>test</scope>
     </dependency>
 
diff --git a/samples/spring-fibonacci-action/pom.xml b/samples/spring-fibonacci-action/pom.xml
index d42fda1658..8883a8a30a 100644
--- a/samples/spring-fibonacci-action/pom.xml
+++ b/samples/spring-fibonacci-action/pom.xml
@@ -307,12 +307,12 @@
     <dependency>
       <groupId>io.kalix</groupId>
       <artifactId>kalix-spring-sdk</artifactId>
-      <version>1.0.8-14-fedc8579-dev-SNAPSHOT</version>
+      <version>${kalix-sdk.version}</version>
     </dependency>
     <dependency>
       <groupId>io.kalix</groupId>
       <artifactId>kalix-spring-sdk-testkit</artifactId>
-      <version>1.0.8-14-fedc8579-dev-SNAPSHOT</version>
+      <version>${kalix-sdk.version}</version>
       <scope>test</scope>
     </dependency>
 

From 007a70fa3a5297817a84bcdc52a3beec2b8eb46d Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Fri, 7 Oct 2022 11:04:17 +0200
Subject: [PATCH 08/13] fixing maven poms

---
 samples/spring-fibonacci-action/pom.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/samples/spring-fibonacci-action/pom.xml b/samples/spring-fibonacci-action/pom.xml
index 8883a8a30a..6c7a8484a5 100644
--- a/samples/spring-fibonacci-action/pom.xml
+++ b/samples/spring-fibonacci-action/pom.xml
@@ -11,7 +11,7 @@
   <properties>
 
     <!-- TODO Update to your own Docker repository or Docker Hub scope -->
-    <dockerImage>aludwiko/${project.artifactId}</dockerImage>
+    <dockerImage>my-docker-repo/${project.artifactId}</dockerImage>
     <dockerTag>${project.version}-${build.timestamp}</dockerTag>
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>com.example.Main</mainClass>

From 6a67695123e9b34931d0f899a24c9d6b921bd763 Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Fri, 7 Oct 2022 11:06:32 +0200
Subject: [PATCH 09/13] reverting changes

---
 .../src/main/java/customer/api/CustomerEvent.java | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java
index 7c75860fe4..aa8eacad23 100644
--- a/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java
+++ b/samples/spring-eventsourced-customer-registry/src/main/java/customer/api/CustomerEvent.java
@@ -8,23 +8,20 @@
 import static customer.api.CustomerEvent.*;
 
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
-//@JsonSubTypes(
-//    {
-//        @JsonSubTypes.Type(value = CustomerCreated.class, name = "customer-created"),
-//        @JsonSubTypes.Type(value = NameChanged.class, name = "name-changed"),
-//        @JsonSubTypes.Type(value = AddressChanged.class, name = "address-changed")
-//    })
+@JsonSubTypes(
+    {
+        @JsonSubTypes.Type(value = CustomerCreated.class, name = "customer-created"),
+        @JsonSubTypes.Type(value = NameChanged.class, name = "name-changed"),
+        @JsonSubTypes.Type(value = AddressChanged.class, name = "address-changed")
+    })
 public sealed interface CustomerEvent {
 
-  @JsonTypeName("customer-created")
   record CustomerCreated(String email, String name, Address address) implements CustomerEvent {
   }
 
-  @JsonTypeName("name-changed")
   record NameChanged(String newName) implements CustomerEvent {
   }
 
-  @JsonTypeName("address-changed")
   record AddressChanged(Address address) implements CustomerEvent {
   }
 }

From 5f1fe7b0e739f9dad4706ee45effa4fee9bedf46 Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Fri, 7 Oct 2022 11:16:29 +0200
Subject: [PATCH 10/13] cleanups and renames

---
 .../pom.xml                                   |  2 +-
 .../pom.xml                                   |  2 +-
 .../test/java/customer/api/JacksonTest.java   | 20 -------------------
 3 files changed, 2 insertions(+), 22 deletions(-)
 delete mode 100644 samples/spring-eventsourced-customer-registry/src/test/java/customer/api/JacksonTest.java

diff --git a/samples/spring-customer-registry-views-quickstart/pom.xml b/samples/spring-customer-registry-views-quickstart/pom.xml
index 5c2264ec82..090eaf4596 100644
--- a/samples/spring-customer-registry-views-quickstart/pom.xml
+++ b/samples/spring-customer-registry-views-quickstart/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>com.example</groupId>
-  <artifactId>spring-customer-registry</artifactId>
+  <artifactId>spring-customer-registry-views</artifactId>
   <version>1.0-SNAPSHOT</version>
   <packaging>jar</packaging>
 
diff --git a/samples/spring-eventsourced-customer-registry/pom.xml b/samples/spring-eventsourced-customer-registry/pom.xml
index fae1b3cec3..603bd6359d 100644
--- a/samples/spring-eventsourced-customer-registry/pom.xml
+++ b/samples/spring-eventsourced-customer-registry/pom.xml
@@ -4,7 +4,7 @@
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>com.example</groupId>
-  <artifactId>spring-customer-registry</artifactId>
+  <artifactId>spring-eventsourced-customer-registry</artifactId>
   <version>1.0-SNAPSHOT</version>
   <packaging>jar</packaging>
 
diff --git a/samples/spring-eventsourced-customer-registry/src/test/java/customer/api/JacksonTest.java b/samples/spring-eventsourced-customer-registry/src/test/java/customer/api/JacksonTest.java
deleted file mode 100644
index 241fa3c3c2..0000000000
--- a/samples/spring-eventsourced-customer-registry/src/test/java/customer/api/JacksonTest.java
+++ /dev/null
@@ -1,20 +0,0 @@
-package customer.api;
-
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import org.junit.jupiter.api.Test;
-
-public class JacksonTest {
-
-  @Test
-  public void testCustomerAddressChange() throws JsonProcessingException {
-    CustomerEvent.CustomerCreated customerCreated = new CustomerEvent.CustomerCreated("email", "name", new Address("street", "some city"));
-    ObjectMapper mapper = new ObjectMapper();
-    String valueAsString = mapper.writeValueAsString(customerCreated);
-    System.out.println(valueAsString);
-
-    CustomerEvent customerEvent = mapper.readValue(valueAsString, CustomerEvent.class);
-
-    System.out.println(customerEvent);
-  }
-}

From 6811401dcab8c99f941587a294a07aef9d75f039 Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Fri, 7 Oct 2022 14:26:50 +0200
Subject: [PATCH 11/13] testing build with java 17

---
 .circleci/config.yml | 14 +++++++-------
 build.sbt            |  1 -
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 45ccc25179..9a5e62c2e8 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -17,19 +17,19 @@ commands:
           parent: main
 
   install-java-11:
-    description: install openjdk-11
+    description: install openjdk-17
     steps:
       - run:
-          name: Install java 11
+          name: Install java 17
           command: |
-            wget https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.8%2B10/OpenJDK11U-jdk_x64_linux_hotspot_11.0.8_10.tar.gz -O /tmp/openjdk-11.tar.gz
+            wget https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17.0.4.1%2B1/OpenJDK17U-jdk_x64_linux_hotspot_17.0.4.1_1.tar.gz -O /tmp/openjdk-17.tar.gz
 
             sudo mkdir -p /usr/lib/jvm
-            sudo tar xfvz /tmp/openjdk-11.tar.gz --directory /usr/lib/jvm
-            rm -f /tmp/openjdk-11.tar.gz
+            sudo tar xfvz /tmp/openjdk-17.tar.gz --directory /usr/lib/jvm
+            rm -f /tmp/openjdk-17.tar.gz
 
-            sudo sh -c 'for bin in /usr/lib/jvm/jdk-11.0.8+10/bin/*; do update-alternatives --install /usr/bin/$(basename $bin) $(basename $bin) $bin 100; done'
-            sudo sh -c 'for bin in /usr/lib/jvm/jdk-11.0.8+10/bin/*; do update-alternatives --set $(basename $bin) $bin; done'
+            sudo sh -c 'for bin in /usr/lib/jvm/jdk-17.0.4.1+1/bin/*; do update-alternatives --install /usr/bin/$(basename $bin) $(basename $bin) $bin 100; done'
+            sudo sh -c 'for bin in /usr/lib/jvm/jdk-17.0.4.1+1/bin/*; do update-alternatives --set $(basename $bin) $bin; done'
 
   setup_sbt:
     description: "Set up sbt"
diff --git a/build.sbt b/build.sbt
index d2c5032ba2..925b602aa0 100644
--- a/build.sbt
+++ b/build.sbt
@@ -65,7 +65,6 @@ lazy val sdkJava = project
       "-Xdoclint:none",
       "-overview",
       ((Compile / javaSource).value / "overview.html").getAbsolutePath,
-      "--no-module-directories",
       "-notimestamp",
       "-doctitle",
       "Kalix Java SDK",

From adb55ca1672667a8b40a663a789ef603f5366587 Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Fri, 7 Oct 2022 15:26:02 +0200
Subject: [PATCH 12/13] reverting java 17 from grpc archetypes

---
 .../src/main/resources/archetype-resources/pom.xml            | 4 ++--
 .../src/main/resources/archetype-resources/pom.xml            | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/maven-java/kalix-maven-archetype-event-sourced-entity/src/main/resources/archetype-resources/pom.xml b/maven-java/kalix-maven-archetype-event-sourced-entity/src/main/resources/archetype-resources/pom.xml
index 6218a056b8..b7ff0f9255 100644
--- a/maven-java/kalix-maven-archetype-event-sourced-entity/src/main/resources/archetype-resources/pom.xml
+++ b/maven-java/kalix-maven-archetype-event-sourced-entity/src/main/resources/archetype-resources/pom.xml
@@ -17,7 +17,7 @@
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>${package}.Main</mainClass>
 
-    <jdk.target>17</jdk.target>
+    <jdk.target>11</jdk.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
     <kalix-sdk.version>@project.version@</kalix-sdk.version>
@@ -122,7 +122,7 @@
               <name>${D}{dockerImage}:%l</name>
               <build>
                 <!-- Base Docker image which contains jre-->
-                <from>docker.io/library/eclipse-temurin:${D}{jdk.target}-alpine</from>
+                <from>docker.io/library/adoptopenjdk:${D}{jdk.target}-jre-hotspot</from>
                 <createImageOptions>
                   <platform>linux/amd64</platform>
                 </createImageOptions>
diff --git a/maven-java/kalix-maven-archetype-value-entity/src/main/resources/archetype-resources/pom.xml b/maven-java/kalix-maven-archetype-value-entity/src/main/resources/archetype-resources/pom.xml
index 6218a056b8..b7ff0f9255 100644
--- a/maven-java/kalix-maven-archetype-value-entity/src/main/resources/archetype-resources/pom.xml
+++ b/maven-java/kalix-maven-archetype-value-entity/src/main/resources/archetype-resources/pom.xml
@@ -17,7 +17,7 @@
     <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     <mainClass>${package}.Main</mainClass>
 
-    <jdk.target>17</jdk.target>
+    <jdk.target>11</jdk.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
     <kalix-sdk.version>@project.version@</kalix-sdk.version>
@@ -122,7 +122,7 @@
               <name>${D}{dockerImage}:%l</name>
               <build>
                 <!-- Base Docker image which contains jre-->
-                <from>docker.io/library/eclipse-temurin:${D}{jdk.target}-alpine</from>
+                <from>docker.io/library/adoptopenjdk:${D}{jdk.target}-jre-hotspot</from>
                 <createImageOptions>
                   <platform>linux/amd64</platform>
                 </createImageOptions>

From 25a9bb4c92250e59c4c0f276165b04f170986e4c Mon Sep 17 00:00:00 2001
From: Andrzej Ludwikowski <andrzej.ludwikowski@lightbend.com>
Date: Fri, 7 Oct 2022 15:50:14 +0200
Subject: [PATCH 13/13] missing jackson annotations

---
 .../src/main/java/com/example/CounterEvent.java       | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/samples/spring-eventsourced-counter/src/main/java/com/example/CounterEvent.java b/samples/spring-eventsourced-counter/src/main/java/com/example/CounterEvent.java
index 2a851425dd..0b53318247 100644
--- a/samples/spring-eventsourced-counter/src/main/java/com/example/CounterEvent.java
+++ b/samples/spring-eventsourced-counter/src/main/java/com/example/CounterEvent.java
@@ -1,5 +1,16 @@
 package com.example;
 
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+
+import static com.example.CounterEvent.*;
+
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
+@JsonSubTypes(
+    {
+        @JsonSubTypes.Type(value = ValueIncreased.class, name = "value-increased"),
+        @JsonSubTypes.Type(value = ValueMultiplied.class, name = "value-multiplied"),
+    })
 public sealed interface CounterEvent {
 
   record ValueIncreased(int value) implements CounterEvent {