Merge pull request #74 from uber/client-helloworld

Add hello world client java sample

Author: chopincode

src/main/java/com/uber/cadence/samples/clientsamples/CadenceUtil.java

@@ -0,0 +1,33 @@
+/*
+ *  Copyright 2012-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ *  Modifications copyright (C) 2017 Uber Technologies, Inc.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"). You may not
+ *  use this file except in compliance with the License. A copy of the License is
+ *  located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ *  or in the "license" file accompanying this file. This file 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.uber.cadence.samples.clientsamples;
+
+import static com.uber.cadence.samples.common.SampleConstants.DOMAIN;
+
+import com.uber.cadence.client.WorkflowClient;
+import com.uber.cadence.client.WorkflowClientOptions;
+import com.uber.cadence.serviceclient.ClientOptions;
+import com.uber.cadence.serviceclient.WorkflowServiceTChannel;
+
+public class CadenceUtil {
+    public static WorkflowClient getWorkflowClient() {
+        return WorkflowClient.newInstance(
+                new WorkflowServiceTChannel(ClientOptions.defaultInstance()),
+                WorkflowClientOptions.newBuilder().setDomain(DOMAIN).build());
+    }
+}

src/main/java/com/uber/cadence/samples/clientsamples/HelloWorldSample.java

@@ -0,0 +1,43 @@
+/*
+ *  Copyright 2012-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ *  Modifications copyright (C) 2017 Uber Technologies, Inc.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"). You may not
+ *  use this file except in compliance with the License. A copy of the License is
+ *  located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ *  or in the "license" file accompanying this file. This file 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.uber.cadence.samples.clientsamples;
+
+import com.uber.cadence.WorkflowExecution;
+import com.uber.cadence.client.WorkflowClient;
+import com.uber.cadence.client.WorkflowOptions;
+import com.uber.cadence.samples.spring.common.Constant;
+import com.uber.cadence.samples.spring.models.SampleMessage;
+import com.uber.cadence.samples.spring.workflows.HelloWorldWorkflow;
+import java.time.Duration;
+
+public class HelloWorldSample {
+    public static void main(String[] args) {
+        WorkflowClient workflowClient = CadenceUtil.getWorkflowClient();
+        WorkflowOptions workflowOptions =
+                new WorkflowOptions.Builder()
+                        .setExecutionStartToCloseTimeout(Duration.ofSeconds(30))
+                        .setTaskList(Constant.TASK_LIST)
+                        .build();
+
+        HelloWorldWorkflow helloWorldWorkflow =
+                workflowClient.newWorkflowStub(HelloWorldWorkflow.class, workflowOptions);
+        WorkflowExecution execution =
+                WorkflowClient.start(helloWorldWorkflow::sayHello, new SampleMessage("Uber"));
+        System.out.printf("WorkflowID: %s, RunID: %s", execution.getWorkflowId(), execution.getRunId());
+    }
+}