Use temporal-sdk-0.19.0 instead of snapshot (#9)

Author: mfateev

build.gradle

@@ -36,7 +36,7 @@ repositories {
 }
 
 dependencies {
-    compile group: 'io.temporal', name: 'temporal-sdk', version: '0.20.0-SNAPSHOT'
+    compile group: 'io.temporal', name: 'temporal-sdk', version: '0.19.0'
 
     compile group: 'commons-configuration', name: 'commons-configuration', version: '1.9'
     compile group: 'ch.qos.logback', name: 'logback-classic', version: '1.2.3'

src/main/java/io/temporal/samples/hello/HelloCron.java

@@ -117,6 +117,7 @@ public static void main(String[] args) throws InterruptedException {
     // Sets the cron schedule using the WorkflowOptions.
     // The cron format is parsed by "https://github.com/robfig/cron" library.
     // Besides the standard "* * * * *" format it supports @every and other extensions.
+    // Note that unit testing framework doesn't support the extensions.
     WorkflowOptions workflowOptions =
         WorkflowOptions.newBuilder().setCronSchedule("* * * * *").build();
     //        WorkflowOptions.newBuilder().setCronSchedule("@every 2s").build();

src/test/java/io/temporal/samples/hello/HelloSignalTest.java

@@ -23,6 +23,7 @@
 
 import io.temporal.client.WorkflowClient;
 import io.temporal.client.WorkflowOptions;
+import io.temporal.proto.common.WorkflowIdReusePolicy;
 import io.temporal.samples.hello.HelloSignal.GreetingWorkflow;
 import io.temporal.testing.TestWorkflowEnvironment;
 import io.temporal.worker.Worker;
@@ -77,6 +78,7 @@ public void testSignal() {
     WorkflowOptions workflowOptions =
         WorkflowOptions.newBuilder()
             .setTaskList(HelloSignal.TASK_LIST)
+            .setWorkflowIdReusePolicy(WorkflowIdReusePolicy.RejectDuplicate)
             .setExecutionStartToCloseTimeout(Duration.ofDays(30))
             .build();
     GreetingWorkflow workflow = client.newWorkflowStub(GreetingWorkflow.class, workflowOptions);