fixed integer parameter parsing. Fixes #2

enforces a minimum of Java 11, as documented

README.md

@@ -7,7 +7,7 @@ java -jar solr-reindexer.jar\
  -sourceCollection my_collection_v1\
  -targetCollection my_collection_v2\ 
  -uniqueKey id\
- -sourceZkAddress localhost:9983,localhost:2181\
+   localhost:9983,localhost:2181\
  -targetZkAddress zoo1:2181,zoo2:2181\
  -skipFields _version_,text\
  -retries 7\
@@ -26,8 +26,11 @@ The rest are:
 - `rows`: we reindex one page at a time. Typically, the best performance is around 1MB per batch. Default is 1000 rows per page/batch
 
 ## Contributing
-Feel free to clone the repository, import it as a Gradle project, and add features. Some that might be useful:
-- support different source and target clusters
+Feel free to clone the repository, import it as a Gradle project, and add features.
+
+To build the uber-jar, use `gradle jar`.
+
+Tentative roadmap:
 - authentication support
 - multi-threading writes using a queue
 - using multiple parallel cursors (e.g. one per shard)

build.gradle

@@ -3,7 +3,13 @@ plugins {
 }
 
 group 'org.sematext'
-version '1.1'
+version '1.2'
+
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(11))
+    }
+}
 
 repositories {
     mavenCentral()

src/main/java/org/sematext/solr/reindexer/Runner.java

@@ -110,7 +110,7 @@ public static void setIntegerParam(String paramName, int defaultValue) {
         int paramValue = defaultValue;
         String paramStringValue = cmd.getOptionValue(paramName);
         if (paramStringValue != null) {
-            paramValue = Integer.parseInt(paramName);
+            paramValue = Integer.parseInt(paramStringValue);
         }
         context.intParams.put(paramName, paramValue);
     }