org.apache.flume.source.TestExecSource.java Source code

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Here is the source code for org.apache.flume.source.TestExecSource.java

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/*
 * 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.flume.source;

import static org.junit.Assert.*;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.apache.flume.Channel;
import org.apache.flume.ChannelSelector;
import org.apache.flume.Context;
import org.apache.flume.Event;
import org.apache.flume.EventDeliveryException;
import org.apache.flume.Transaction;
import org.apache.flume.channel.ChannelProcessor;
import org.apache.flume.channel.MemoryChannel;
import org.apache.flume.channel.ReplicatingChannelSelector;
import org.apache.flume.conf.Configurables;
import org.apache.flume.lifecycle.LifecycleException;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import com.google.common.base.Charsets;
import com.google.common.collect.Lists;

public class TestExecSource {

    private AbstractSource source;

    @Before
    public void setUp() {
        source = new ExecSource();
    }

    @Test
    public void testProcess() throws InterruptedException, LifecycleException, EventDeliveryException, IOException {

        Channel channel = new MemoryChannel();
        Context context = new Context();

        context.put("command", "cat /etc/passwd");
        context.put("keep-alive", "1");
        context.put("capacity", "1000");
        context.put("transactionCapacity", "1000");
        Configurables.configure(source, context);
        Configurables.configure(channel, context);

        ChannelSelector rcs = new ReplicatingChannelSelector();
        rcs.setChannels(Lists.newArrayList(channel));

        source.setChannelProcessor(new ChannelProcessor(rcs));

        source.start();
        Transaction transaction = channel.getTransaction();

        transaction.begin();
        Event event;

        FileOutputStream outputStream = new FileOutputStream(
                "/tmp/flume-execsource." + Thread.currentThread().getId());

        while ((event = channel.take()) != null) {
            outputStream.write(event.getBody());
            outputStream.write('\n');
        }

        outputStream.close();
        transaction.commit();
        transaction.close();

        source.stop();

        File file1 = new File("/tmp/flume-execsource." + Thread.currentThread().getId());
        File file2 = new File("/etc/passwd");
        Assert.assertEquals(FileUtils.checksumCRC32(file1), FileUtils.checksumCRC32(file2));
        FileUtils.forceDelete(file1);
    }

    @Test
    public void testRestart() throws InterruptedException, LifecycleException, EventDeliveryException, IOException {

        Channel channel = new MemoryChannel();
        Context context = new Context();

        context.put(ExecSourceConfigurationConstants.CONFIG_RESTART_THROTTLE, "10");
        context.put(ExecSourceConfigurationConstants.CONFIG_RESTART, "true");

        context.put("command", "echo flume");
        Configurables.configure(source, context);
        Configurables.configure(channel, context);

        ChannelSelector rcs = new ReplicatingChannelSelector();
        rcs.setChannels(Lists.newArrayList(channel));

        source.setChannelProcessor(new ChannelProcessor(rcs));

        source.start();
        Transaction transaction = channel.getTransaction();

        transaction.begin();

        long start = System.currentTimeMillis();

        for (int i = 0; i < 5; i++) {
            Event event = channel.take();
            assertNotNull(event);
            assertNotNull(event.getBody());
            assertEquals("flume", new String(event.getBody(), Charsets.UTF_8));
        }

        // ensure restartThrottle was turned down as expected
        assertTrue(System.currentTimeMillis() - start < 10000L);

        transaction.commit();
        transaction.close();

        source.stop();
    }
}