org.apache.phoenix.logging.PerformanceLog.java Source code

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Here is the source code for org.apache.phoenix.logging.PerformanceLog.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.phoenix.logging;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.lang.time.StopWatch;

/**
 * Performance data logging  
 * 
 */
public class PerformanceLog {
    private StopWatch stopWatch = null;
    private static FileOutputStream fostream = null;

    public PerformanceLog(String startMessage) throws IOException {
        getStopWatch().start();
        instanceLog("START: " + startMessage);
    }

    public static void startLog() throws FileNotFoundException {
        getFileOutputStream();
    }

    public static void startLog(String fileName) throws FileNotFoundException {
        getFileOutputStream(fileName);
    }

    public static void stopLog() throws FileNotFoundException, IOException {
        getFileOutputStream().close();
        fostream = null;
    }

    public void stopStopWatch() throws IOException {
        getStopWatch().stop();
        instanceLog("STOP");
    }

    public void stopStopWatch(String message) throws IOException {
        getStopWatch().stop();
        instanceLog("STOP: " + message);
    }

    /**
     * Log a message to persistent storage. Elapsed time since start is added.
     * @param message
     * @throws IOException
     */
    public void instanceLog(String message) throws IOException {
        long elapsedMs = getStopWatch().getTime();
        String displayTime = elapsedMs < 1000 ? elapsedMs + " ms" : elapsedMs / 1000 + " sec";
        message = getDateTime() + " (" + displayTime + ") : " + message + "\n";
        System.out.println(message);
        getFileOutputStream().write(message.getBytes());
    }

    public static void log(String message) throws IOException {
        message = getDateTime() + ": " + message + "\n";
        System.out.println(message);
        getFileOutputStream().write(message.getBytes());
    }

    private static FileOutputStream getFileOutputStream() throws FileNotFoundException {
        return getFileOutputStream(null);
    }

    private static FileOutputStream getFileOutputStream(String fileName) throws FileNotFoundException {
        if (fostream == null) {
            String folderName = "results";
            File folder = new File(folderName);
            if (!folder.exists()) {
                folder.mkdir();
            }
            String generatedFileName = folderName + "/"
                    + (fileName.endsWith("|") ? fileName.substring(0, fileName.length() - 1) : fileName) + ".txt";
            fostream = new FileOutputStream(generatedFileName);
        }

        return fostream;
    }

    private StopWatch getStopWatch() {
        if (stopWatch == null) {
            stopWatch = new StopWatch();
        }
        return stopWatch;
    }

    private final static String getDateTime() {
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd_hh:mm:ss");
        return df.format(new Date());
    }
}