camel-2.8.x/camel-core/src/test/java/org/apache/camel/processor/SplitterParallelBigFileTest.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.processor;

import java.io.File;
import java.io.FileOutputStream;
import java.util.concurrent.TimeUnit;

import org.apache.camel.CamelException;
import org.apache.camel.ContextTestSupport;
import org.apache.camel.builder.NotifyBuilder;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.util.IOHelper;
import org.apache.camel.util.StopWatch;
import org.apache.camel.util.TimeUtils;

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

    private int lines = 20000;

    @Override
    protected void setUp() throws Exception {
        deleteDirectory("target/split");
        createDirectory("target/split");
        createBigFile();
        super.setUp();
    }

    private void createBigFile() throws Exception {
        File file = new File("target/split/bigfile.txt");
        FileOutputStream fos = new FileOutputStream(file);
        for (int i = 0; i < lines; i++) {
            String line = "line-" + i + LS;
            fos.write(line.getBytes());
        }
        IOHelper.close(fos);
    }

    public void testNoop() {
        // noop
    }

    // disabled due manual test
    public void xxxtestSplitParallelBigFile() throws Exception {
        StopWatch watch = new StopWatch();

        NotifyBuilder builder = new NotifyBuilder(context).whenDone(lines + 1).create();
        boolean done = builder.matches(120, TimeUnit.SECONDS);

        log.info("Took " + TimeUtils.printDuration(watch.stop()));

        if (!done) {
            throw new CamelException("Could not split file in 2 minutes");
        }

        // need a little sleep for capturing memory profiling
        // Thread.sleep(60 * 1000);
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                // lower max pool to 10 for less number of concurrent threads
                //context.getExecutorServiceStrategy().getDefaultThreadPoolProfile().setMaxPoolSize(10);

                from("file:target/split")
                    .split(body().tokenize(LS)).streaming().parallelProcessing()
                        .to("log:split?groupSize=1000")
                    .end()
                    .log("Done splitting ${file:name}");
            }
        };
    }

}