From 9bc0d442e67248d0899429ae8548340c055ee50f Mon Sep 17 00:00:00 2001
From: fupduck <fupduck@users.noreply.github.com>
Date: Fri, 2 Aug 2019 19:39:33 +0200
Subject: [PATCH] feat(GraphQLTemplate) option to externalize fetching (#85)

---
 .../java/io/aexp/nodes/graphql/Fetch.java     |  4 ++--
 .../java/io/aexp/nodes/graphql/Fetcher.java   | 20 +++++++++++++++++++
 .../aexp/nodes/graphql/GraphQLTemplate.java   | 12 +++++++++--
 3 files changed, 32 insertions(+), 4 deletions(-)
 create mode 100644 nodes/src/main/java/io/aexp/nodes/graphql/Fetcher.java

diff --git a/nodes/src/main/java/io/aexp/nodes/graphql/Fetch.java b/nodes/src/main/java/io/aexp/nodes/graphql/Fetch.java
index b511085..a7a0e63 100644
--- a/nodes/src/main/java/io/aexp/nodes/graphql/Fetch.java
+++ b/nodes/src/main/java/io/aexp/nodes/graphql/Fetch.java
@@ -30,7 +30,7 @@
 import java.util.List;
 import java.util.Map;
 
-final class Fetch {
+final class Fetch implements Fetcher {
 
     private final ObjectMapperFactory objectMapperFactory;
     private ObjectMapper mapper;
@@ -50,7 +50,7 @@ final class Fetch {
 
     }
 
-    <T> GraphQLResponseEntity<T> send(GraphQLRequestEntity requestEntity, Class<T> responseClass) throws GraphQLException {
+    public <T> GraphQLResponseEntity<T> send(GraphQLRequestEntity requestEntity, Class<T> responseClass) throws GraphQLException {
         mapper = objectMapperFactory.newSerializerMapper();
         module = new SimpleModule();
 
diff --git a/nodes/src/main/java/io/aexp/nodes/graphql/Fetcher.java b/nodes/src/main/java/io/aexp/nodes/graphql/Fetcher.java
new file mode 100644
index 0000000..c6af248
--- /dev/null
+++ b/nodes/src/main/java/io/aexp/nodes/graphql/Fetcher.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2018 American Express Travel Related Services Company, 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 io.aexp.nodes.graphql;
+
+import io.aexp.nodes.graphql.exceptions.GraphQLException;
+
+public interface Fetcher {
+    <T> GraphQLResponseEntity<T> send(GraphQLRequestEntity requestEntity, Class<T> responseClass) throws GraphQLException;
+}
diff --git a/nodes/src/main/java/io/aexp/nodes/graphql/GraphQLTemplate.java b/nodes/src/main/java/io/aexp/nodes/graphql/GraphQLTemplate.java
index 6938c11..dce4b40 100644
--- a/nodes/src/main/java/io/aexp/nodes/graphql/GraphQLTemplate.java
+++ b/nodes/src/main/java/io/aexp/nodes/graphql/GraphQLTemplate.java
@@ -18,7 +18,7 @@
 
 public class GraphQLTemplate {
 
-    private Fetch fetch;
+    private Fetcher fetch;
 
     public enum GraphQLMethod {
         QUERY("query"),
@@ -45,7 +45,15 @@ public GraphQLTemplate() {
      * @param objectMapperFactory factory class used for creating ObjectMapper instances
      */
     public GraphQLTemplate(final ObjectMapperFactory objectMapperFactory) {
-        fetch = new Fetch(objectMapperFactory);
+        this(new Fetch(objectMapperFactory));
+    }
+
+    /**
+     * Constructs a new GraphQL template instance using the specified ObjectMapper factory.
+     * @param fetcher custom fetch provider
+     */
+    public GraphQLTemplate(final Fetcher fetcher) {
+        fetch = fetcher;
     }
 
     /**