camel-core/src/test/java/org/apache/camel/issues/StopRouteFromRouteTest.java

/**
 * 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.issues;

import junit.framework.TestCase;
import org.apache.camel.CamelContext;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.impl.DefaultCamelContext;

/**
 *
 */
public class StopRouteFromRouteTest extends TestCase {

    // START SNIPPET: e1
    public void testStopRouteFromRoute() throws Exception {
        // create camel, add routes, and start camel
        CamelContext context = new DefaultCamelContext();
        context.addRoutes(createMyRoutes());
        context.start();

        assertTrue("Route myRoute should be started", context.getRouteStatus("myRoute").isStarted());
        assertTrue("Route bar should be started", context.getRouteStatus("bar").isStarted());

        // setup mock expectations for unit test
        MockEndpoint start = context.getEndpoint("mock:start", MockEndpoint.class);
        start.expectedMessageCount(1);
        MockEndpoint done = context.getEndpoint("mock:done", MockEndpoint.class);
        done.expectedMessageCount(1);

        // send a message to the route
        ProducerTemplate template = context.createProducerTemplate();
        template.sendBody("direct:start", "Hello Camel");

        // just wait a bit for the thread to stop the route
        Thread.sleep(1500);

        // the route should now be stopped
        assertTrue("Route myRoute should be stopped", context.getRouteStatus("myRoute").isStopped());
        assertTrue("Route bar should be started", context.getRouteStatus("bar").isStarted());

        // stop camel
        context.stop();

        // unit test assertions
        start.assertIsSatisfied();
        done.assertIsSatisfied();
    }
    // END SNIPPET: e1

    // START SNIPPET: e2
    public RouteBuilder createMyRoutes() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("direct:start").routeId("myRoute")
                    .to("mock:start")
                    .process(new Processor() {
                        Thread stop;

                        @Override
                        public void process(final Exchange exchange) throws Exception {
                            // stop this route using a thread that will stop
                            // this route gracefully while we are still running
                            if (stop == null) {
                                stop = new Thread() {
                                    @Override
                                    public void run() {
                                        try {
                                            exchange.getContext().stopRoute("myRoute");
                                        } catch (Exception e) {
                                            // ignore
                                        }
                                    }
                                };
                            }

                            // start the thread that stops this route
                            stop.start();
                        }
                    }).to("mock:done");
                
                from("direct:bar").routeId("bar")
                    .to("mock:bar");
            }
        };
    }
    // END SNIPPET: e2
}