org.apache.hadoop.yarn.util.TestAdHocLogDumper.java Source code

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Here is the source code for org.apache.hadoop.yarn.util.TestAdHocLogDumper.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.hadoop.yarn.util;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.impl.Log4JLogger;
import org.apache.hadoop.util.Time;
import org.apache.log4j.Appender;
import org.apache.log4j.AppenderSkeleton;
import org.apache.log4j.Logger;
import org.apache.log4j.Priority;
import org.junit.Assert;
import org.junit.Test;

import java.io.File;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

public class TestAdHocLogDumper {

    private static final Log LOG = LogFactory.getLog(TestAdHocLogDumper.class);

    @Test
    public void testDumpingSchedulerLogs() throws Exception {

        Map<Appender, Priority> levels = new HashMap<>();
        String logHierarchy = TestAdHocLogDumper.class.getName();
        String logFilename = "test.log";
        Log log = LogFactory.getLog(logHierarchy);
        if (log instanceof Log4JLogger) {
            for (Enumeration appenders = Logger.getRootLogger().getAllAppenders(); appenders.hasMoreElements();) {
                Object obj = appenders.nextElement();
                if (obj instanceof AppenderSkeleton) {
                    AppenderSkeleton appender = (AppenderSkeleton) obj;
                    levels.put(appender, appender.getThreshold());
                }
            }
        }

        AdHocLogDumper dumper = new AdHocLogDumper(logHierarchy, logFilename);
        dumper.dumpLogs("DEBUG", 1000);
        LOG.debug("test message 1");
        LOG.info("test message 2");
        File logFile = new File(logFilename);
        Assert.assertTrue(logFile.exists());
        Thread.sleep(2000);
        long lastWrite = logFile.lastModified();
        Assert.assertTrue(lastWrite < Time.now());
        Assert.assertTrue(logFile.length() != 0);

        // make sure levels are set back to their original values
        if (log instanceof Log4JLogger) {
            for (Enumeration appenders = Logger.getRootLogger().getAllAppenders(); appenders.hasMoreElements();) {
                Object obj = appenders.nextElement();
                if (obj instanceof AppenderSkeleton) {
                    AppenderSkeleton appender = (AppenderSkeleton) obj;
                    Assert.assertEquals(levels.get(appender), appender.getThreshold());
                }
            }
        }
        boolean del = logFile.delete();
        if (!del) {
            LOG.info("Couldn't clean up after test");
        }
    }
}