com.amazonaws.services.simpleworkflow.flow.worker.ActivityExecutionContextImpl Maven / Gradle / Ivy

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The Amazon Web Services SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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/*
 * 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.worker;

import java.util.concurrent.CancellationException;

import com.amazonaws.services.simpleworkflow.AmazonSimpleWorkflow;
import com.amazonaws.services.simpleworkflow.flow.ActivityExecutionContext;
import com.amazonaws.services.simpleworkflow.model.ActivityTask;
import com.amazonaws.services.simpleworkflow.model.ActivityTaskStatus;
import com.amazonaws.services.simpleworkflow.model.RecordActivityTaskHeartbeatRequest;
import com.amazonaws.services.simpleworkflow.model.WorkflowExecution;

/**
 * Base implementation of an {@link ActivityExecutionContext}.
 * 
 * @see ActivityExecutionContext
 * 
 * @author fateev, suskin
 * 
 */
class ActivityExecutionContextImpl extends ActivityExecutionContext {

    private final AmazonSimpleWorkflow service;

    private final String domain;
    
    private final ActivityTask task;

    /**
     * Create an ActivityExecutionContextImpl with the given attributes.
     * 
     * @param service
     *            The {@link AmazonSimpleWorkflow} this
     *            ActivityExecutionContextImpl will send service calls to.
     * @param task
     *            The {@link ActivityTask} this ActivityExecutionContextImpl
     *            will be used for.
     * 
     * @see ActivityExecutionContext
     */
    public ActivityExecutionContextImpl(AmazonSimpleWorkflow service, String domain, ActivityTask task) {
        this.domain = domain;
        this.service = service;
        this.task = task;
    }

    /**
     * @throws CancellationException
     * @see ActivityExecutionContext#recordActivityHeartbeat(int)
     */
    @Override
    public void recordActivityHeartbeat(String details) throws CancellationException {
        //TODO: call service with the specified minimal interval (through @ActivityExecutionOptions)
        // allowing more frequent calls of this method.
        RecordActivityTaskHeartbeatRequest r = new RecordActivityTaskHeartbeatRequest();
        r.setTaskToken(task.getTaskToken());
        r.setDetails(details);
        ActivityTaskStatus status;
        status = service.recordActivityTaskHeartbeat(r);
        if (status.isCancelRequested()) {
            throw new CancellationException();
        }
    }

    /**
     * @see ActivityExecutionContext#getTask()
     */
    @Override
    public ActivityTask getTask() {
        return task;
    }

    /**
     * @see ActivityExecutionContext#getService()
     */
    @Override
    public AmazonSimpleWorkflow getService() {
        return service;
    }

    @Override
    public String getTaskToken() {
        return task.getTaskToken();
    }

    @Override
    public WorkflowExecution getWorkflowExecution() {
        return task.getWorkflowExecution();
    }

    @Override
    public String getDomain() {
        return domain;
    }

}