io.druid.segment.LoggingProgressIndicator.java Source code

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Here is the source code for io.druid.segment.LoggingProgressIndicator.java

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/*
 * Druid - a distributed column store.
 * Copyright 2012 - 2015 Metamarkets Group Inc.
 *
 * 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 io.druid.segment;

import com.google.common.base.Stopwatch;
import com.google.common.collect.Maps;
import com.metamx.common.ISE;
import com.metamx.common.logger.Logger;

import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 */
public class LoggingProgressIndicator extends BaseProgressIndicator {
    private static Logger log = new Logger(LoggingProgressIndicator.class);

    private final String progressName;
    private final Stopwatch global;

    private final Map<String, Stopwatch> sections = Maps.newHashMap();

    public LoggingProgressIndicator(String progressName) {
        this.progressName = progressName;
        this.global = Stopwatch.createUnstarted();
    }

    @Override
    public void start() {
        log.info("Starting [%s]", progressName);
        global.start();
    }

    @Override
    public void stop() {
        long time = global.elapsed(TimeUnit.MILLISECONDS);
        global.stop();

        log.info("[%s] complete. Elapsed time: [%,d] millis", progressName, time);
    }

    @Override
    public void startSection(String section) {
        log.info("[%s]: Starting [%s]", progressName, section);

        Stopwatch sectionWatch = sections.get(section);
        if (sectionWatch != null) {
            throw new ISE("[%s]: Cannot start progress tracker for [%s]. It is already started.", progressName,
                    section);
        }
        sectionWatch = Stopwatch.createStarted();
        sections.put(section, sectionWatch);
    }

    @Override
    public void progressSection(String section, String message) {
        Stopwatch sectionWatch = sections.get(section);
        if (sectionWatch == null) {
            throw new ISE("[%s]: Cannot progress tracker for [%s]. Nothing started.", progressName, section);
        }
        long time = sectionWatch.elapsed(TimeUnit.MILLISECONDS);
        log.info("[%s]: [%s] : %s. Elapsed time: [%,d] millis", progressName, section, message, time);
    }

    @Override
    public void stopSection(String section) {
        Stopwatch sectionWatch = sections.remove(section);
        if (sectionWatch == null) {
            throw new ISE("[%s]: Cannot stop progress tracker for [%s]. Nothing started.", progressName, section);
        }
        long time = sectionWatch.elapsed(TimeUnit.MILLISECONDS);
        sectionWatch.stop();

        log.info("[%s]: [%s] has completed. Elapsed time: [%,d] millis", progressName, section, time);
    }
}