/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.camel.processor;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.ShutdownRunningTask;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;

/**
 * @version 
 */
public class ShutdownCompleteAllTasksTest extends ContextTestSupport {

    private static String url = "file:target/pending?initialDelay=0&delay=10";
    private static AtomicInteger counter = new AtomicInteger();
    private static CountDownLatch latch = new CountDownLatch(2);

    @Override
    protected void setUp() throws Exception {
        deleteDirectory("target/pending");
        super.setUp();

        template.sendBodyAndHeader(url, "A", Exchange.FILE_NAME, "a.txt");
        template.sendBodyAndHeader(url, "B", Exchange.FILE_NAME, "b.txt");
        template.sendBodyAndHeader(url, "C", Exchange.FILE_NAME, "c.txt");
        template.sendBodyAndHeader(url, "D", Exchange.FILE_NAME, "d.txt");
        template.sendBodyAndHeader(url, "E", Exchange.FILE_NAME, "e.txt");
    }

    public void testShutdownCompleteAllTasks() throws Exception {
        // give it 30 seconds to shutdown
        context.getShutdownStrategy().setTimeout(30);

        // start route
        context.startRoute("foo");

        MockEndpoint bar = getMockEndpoint("mock:bar");
        bar.expectedMinimumMessageCount(1);

        assertMockEndpointsSatisfied();

        int batch = bar.getReceivedExchanges().get(0).getProperty(Exchange.BATCH_SIZE, int.class);

        // wait for latch
        latch.await(10, TimeUnit.SECONDS);

        // shutdown during processing
        context.stop();

        // should route all
        assertEquals("Should complete all messages", batch, counter.get());
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            // START SNIPPET: e1
            public void configure() throws Exception {
                from(url).routeId("foo").noAutoStartup()
                    // let it complete all tasks during shutdown
                    .shutdownRunningTask(ShutdownRunningTask.CompleteAllTasks)
                    .process(new MyProcessor())
                    .to("mock:bar");
            }
            // END SNIPPET: e1
        };
    }

    public static class MyProcessor implements Processor {

        public void process(Exchange exchange) throws Exception {
            counter.incrementAndGet();
            latch.countDown();
        }
    }

}