/**
 * Copyright 2015 Google Inc. 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.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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.google.cloud.taskqueue.samples;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

import com.google.appengine.api.taskqueue.DeferredTask;
import com.google.appengine.api.taskqueue.Queue;
import com.google.appengine.api.taskqueue.QueueFactory;
import com.google.appengine.api.taskqueue.TaskOptions;

/**
 * This small servlet demonstrates how to use the DeferredTask
 * interface to background a task on the AppEngine task queues,
 * without needing to create a separate URL handler.
 */
public class DeferSampleServlet extends HttpServlet {

    //[START defer]
    public static class ExpensiveOperation implements DeferredTask {
        @Override
        public void run() {
            System.out.println("Doing an expensive operation...");
            // expensive operation to be backgrounded goes here
        }
    }

    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse
            resp) throws IOException {
        // Add the task to the default queue.
        Queue queue = QueueFactory.getDefaultQueue();

        // Wait 5 seconds to run for demonstration purposes
        queue.add(TaskOptions.Builder.withPayload(new ExpensiveOperation())
                .etaMillis(System.currentTimeMillis() + 5000));

        resp.setContentType("text/plain");
        resp.getWriter().println("Task is backgrounded on queue!");
    }
    //[END defer]

}

/**
 * Copyright 2015 Google Inc. 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.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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.
 */

/**
 * This package demonstrates how to use the task queue with Java.
 */
package com.google.cloud.taskqueue.samples;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

import com.google.appengine.api.taskqueue.DeferredTask;
import com.google.appengine.api.taskqueue.Queue;
import com.google.appengine.api.taskqueue.QueueFactory;
import com.google.appengine.api.taskqueue.TaskOptions;

/**
 * This small servlet demonstrates how to use the DeferredTask
 * interface to background a task on the AppEngine task queues,
 * without needing to create a separate URL handler.
 */
public class DeferSampleServlet extends HttpServlet {

    /**
     * Number of ms long we will arbitrarily delay.
     */
    static final int DELAY_MS = 5000;

    //[START defer]
    /**
     * A hypothetical expensive operation we want to defer on a background task.
     */
    public static class ExpensiveOperation implements DeferredTask {
        @Override
        public void run() {
            System.out.println("Doing an expensive operation...");
            // expensive operation to be backgrounded goes here
        }
    }

    /**
     * Basic demonstration of adding a deferred task.
     * @param request servlet request
     * @param resp servlet response
     */
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse
            resp) throws IOException {
        // Add the task to the default queue.
        Queue queue = QueueFactory.getDefaultQueue();

        // Wait 5 seconds to run for demonstration purposes
        queue.add(TaskOptions.Builder.withPayload(new ExpensiveOperation())
                .etaMillis(System.currentTimeMillis() + DELAY_MS));

        resp.setContentType("text/plain");
        resp.getWriter().println("Task is backgrounded on queue!");
    }
    //[END defer]

}

Fix style on DeferSampleServlet