Changed id generation to alphanumeric

Author: Maxim Fateev

src/main/java/com/uber/cadence/samples/bookingsaga/TripBookingSaga.java

@@ -27,8 +27,8 @@ public class TripBookingSaga {
 
   static final String TASK_LIST = "TripBooking";
 
+  @SuppressWarnings("CatchAndPrintStackTrace")
   public static void main(String[] args) {
-
     // Get worker to poll the common task list.
     Worker.Factory factory = new Worker.Factory(DOMAIN);
     final Worker workerForCommonTaskList = factory.newWorker(TASK_LIST);

src/main/java/com/uber/cadence/samples/hello/HelloSignal.java

@@ -19,7 +19,6 @@
 
 import static com.uber.cadence.samples.common.SampleConstants.DOMAIN;
 
-import com.google.common.base.Charsets;
 import com.uber.cadence.client.WorkflowClient;
 import com.uber.cadence.client.WorkflowOptions;
 import com.uber.cadence.worker.Worker;
@@ -29,7 +28,7 @@
 import java.time.Duration;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Random;
+import org.apache.commons.lang.RandomStringUtils;
 
 /**
  * Demonstrates asynchronous signalling of a workflow. Requires a local instance of Cadence server
@@ -95,10 +94,8 @@ public static void main(String[] args) throws Exception {
     worker.registerWorkflowImplementationTypes(GreetingWorkflowImpl.class);
     factory.start();
 
-    // In real applications use a business level ID like customerId or orderId
-    byte[] idBytes = new byte[10];
-    new Random().nextBytes(idBytes);
-    String workflowId = new String(idBytes, Charsets.UTF_8);
+    // In a real application use a business ID like customer ID or order ID
+    String workflowId = RandomStringUtils.randomAlphabetic(10);
 
     // Start a workflow execution. Usually this is done from another program.
     WorkflowClient workflowClient = WorkflowClient.newInstance(DOMAIN);