com.spotify.helios.system.LoggingTestWatcher.java Source code

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Here is the source code for com.spotify.helios.system.LoggingTestWatcher.java

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/*
 * Copyright (c) 2014 Spotify AB.
 *
 * Licensed 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 com.spotify.helios.system;

import static org.slf4j.Logger.ROOT_LOGGER_NAME;

import com.google.common.base.Strings;
import com.google.common.base.Throwables;

import org.junit.rules.TestWatcher;
import org.junit.runner.Description;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.text.SimpleDateFormat;
import java.util.Date;

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.encoder.PatternLayoutEncoder;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.FileAppender;

/**
 * Custom logback configuration for system tests.
 */
final class LoggingTestWatcher extends TestWatcher {

    private static final Logger log = LoggerFactory.getLogger(LoggingTestWatcher.class);

    /**
     * Logs a line full of the = character as a separator.
     */
    private void logLine() {
        log.info(Strings.repeat("=", 80));
    }

    @Override
    protected void starting(Description description) {
        if (Boolean.getBoolean("logToFile")) {
            final String name = description.getClassName() + "_" + description.getMethodName();
            setupFileLogging(name);
        }
        logLine();
        log.info("STARTING: {}: {}", description.getClassName(), description.getMethodName());
        logLine();
    }

    @Override
    protected void succeeded(final Description description) {
        logLine();
        log.info("FINISHED: {}: {}", description.getClassName(), description.getMethodName());
        logLine();
    }

    @Override
    protected void failed(final Throwable e, final Description description) {
        logLine();
        log.info("FAILED  : {} {}", description.getClassName(), description.getMethodName());
        log.info("Exception", e);
        logLine();
    }

    /**
     * Sets up a FileAppender under the path {@code $logDir/<timestamp>-<name>-<pid>.log}. If not set
     * as a system property then {@code $logDir} falls back to {@code /tmp/helios-test/log}.
     */
    private void setupFileLogging(final String name) {
        final ch.qos.logback.classic.Logger rootLogger = (ch.qos.logback.classic.Logger) LoggerFactory
                .getLogger(ROOT_LOGGER_NAME);
        final LoggerContext context = rootLogger.getLoggerContext();
        context.reset();

        final String ts = new SimpleDateFormat("yyyyMMdd'T'HHmmss.SSS").format(new Date());
        final String pid = ManagementFactory.getRuntimeMXBean().getName().split("@", 2)[0];

        final PatternLayoutEncoder ple = new PatternLayoutEncoder();
        ple.setContext(context);
        ple.setPattern("%d{HH:mm:ss.SSS} %-5level %logger{1} %F:%L - %msg%n");
        ple.start();

        final Path directory = Paths.get(System.getProperty("logDir", "/tmp/helios-test/log/"));
        final String filename = String.format("%s-%s-%s.log", ts, name, pid);
        final Path file = directory.resolve(filename);

        final FileAppender<ILoggingEvent> fileAppender = new FileAppender<>();
        fileAppender.setEncoder(ple);
        fileAppender.setFile(file.toString());
        fileAppender.setContext(context);
        fileAppender.start();

        rootLogger.setLevel(Level.DEBUG);
        rootLogger.addAppender(fileAppender);

        try {
            Files.createDirectories(directory);
        } catch (IOException e) {
            throw Throwables.propagate(e);
        }

        configureLogger("org.eclipse.jetty", Level.ERROR);
        configureLogger("org.apache.curator", Level.ERROR);
        configureLogger("org.apache.zookeeper", Level.ERROR);
        configureLogger("com.spotify.helios", Level.DEBUG);
    }

    private void configureLogger(final String name, final Level level) {
        final ch.qos.logback.classic.Logger logger = (ch.qos.logback.classic.Logger) LoggerFactory.getLogger(name);
        logger.setLevel(level);
    }
}