core/camel-core/src/test/java/org/apache/camel/component/file/FileConsumerSharedThreadPollTest.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.component.file;

import java.util.concurrent.ScheduledExecutorService;

import org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.builder.ThreadPoolBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.junit.Before;
import org.junit.Test;

/**
 *
 */
public class FileConsumerSharedThreadPollTest extends ContextTestSupport {

    private ScheduledExecutorService pool;

    @Override
    @Before
    public void setUp() throws Exception {
        deleteDirectory("target/data/a");
        deleteDirectory("target/data/b");
        super.setUp();
    }

    @Test
    public void testSharedThreadPool() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:result");
        mock.expectedMessageCount(2);
        // thread thread name should be the same
        mock.message(0).header("threadName").isEqualTo(mock.message(1).header("threadName"));

        template.sendBodyAndHeader("file:target/data/a", "Hello World", Exchange.FILE_NAME, "hello.txt");
        template.sendBodyAndHeader("file:target/data/b", "Bye World", Exchange.FILE_NAME, "bye.txt");

        assertMockEndpointsSatisfied();
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                // create shared pool and enlist in registry
                pool = new ThreadPoolBuilder(context).poolSize(1).buildScheduled(this, "MySharedPool");
                context.getRegistry().bind("myPool", pool);

                from("file:target/data/a?initialDelay=0&delay=10&scheduledExecutorService=#myPool").routeId("a").to("direct:shared");

                from("file:target/data/b?initialDelay=0&delay=10&scheduledExecutorService=#myPool").routeId("b").to("direct:shared");

                from("direct:shared").routeId("shared").convertBodyTo(String.class).log("Get ${file:name} using ${threadName}").process(new Processor() {
                    @Override
                    public void process(Exchange exchange) throws Exception {
                        exchange.getIn().setHeader("threadName", Thread.currentThread().getName());
                    }
                }).to("mock:result");
            }
        };
    }
}