/*
* Copyright 2012-2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* 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.amazonaws.services.simpleworkflow.flow.examples.periodicworkflow;
import com.amazonaws.services.simpleworkflow.AmazonSimpleWorkflow;
import com.amazonaws.services.simpleworkflow.flow.examples.common.ConfigHelper;
import com.amazonaws.services.simpleworkflow.model.ActivityType;
import com.amazonaws.services.simpleworkflow.model.WorkflowExecution;
import com.amazonaws.services.simpleworkflow.model.WorkflowExecutionAlreadyStartedException;
public class WorkflowExecutionStarter {
private static AmazonSimpleWorkflow swfService;
private static String domain;
public static void main(String[] args) throws Exception {
// Load configuration
ConfigHelper configHelper = ConfigHelper.createConfig();
// Create the client for Simple Workflow Service
swfService = configHelper.createSWFClient();
domain = configHelper.getDomain();
// Start Workflow execution
PeriodicWorkflowClientExternalFactory clientFactory = new PeriodicWorkflowClientExternalFactoryImpl(swfService, domain);
// Passing instance id to ensure that only one periodic workflow can be active at a time.
// Use different id for each schedule.
PeriodicWorkflowClientExternal workflow = clientFactory.getClient("periodic1");
// Execute activity every two 10 seconds, wait for it to complete before starting the new one,
// create new run every 30 seconds and stop the workflow after two minutes.
// Obviously these periods are so low to make example run fast enough to not be boring.
// In production case there is no need to create new runs so frequently.
PeriodicWorkflowOptions options = new PeriodicWorkflowOptions();
options.setExecutionPeriodSeconds(10);
options.setContinueAsNewAfterSeconds(30);
options.setCompleteAfterSeconds(120);
options.setWaitForActivityCompletion(true);
ActivityType activityType = new ActivityType();
activityType.setName("PeriodicWorkflowActivities.doSomeWork");
activityType.setVersion("1.0");
Object[] parameters = new Object[] { "parameter1" };
try {
workflow.startPeriodicWorkflow(activityType, parameters, options);
// WorkflowExecution is available after workflow creation
WorkflowExecution workflowExecution = workflow.getWorkflowExecution();
System.out.println("Started periodic workflow with workflowId=\"" + workflowExecution.getWorkflowId()
+ "\" and runId=\"" + workflowExecution.getRunId() + "\"");
}
catch (WorkflowExecutionAlreadyStartedException e) {
// It is expected to get this exception if start is called before workflow run is completed.
System.out.println("Periodic workflow with workflowId=\"" + workflow.getWorkflowExecution().getWorkflowId()
+ " is already running");
}
System.exit(0);
}
}