org.apache.geode.management.internal.cli.util.MergeLogs.java Source code

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Here is the source code for org.apache.geode.management.internal.cli.util.MergeLogs.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.geode.management.internal.cli.util;

import static java.util.stream.Collectors.toList;

import java.io.BufferedReader;
import java.io.File;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FilenameFilter;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.io.FileUtils;
import org.apache.geode.internal.logging.MergeLogFiles;
import org.apache.geode.management.cli.Result;
import org.apache.geode.management.internal.cli.GfshParser;
import org.apache.geode.management.internal.cli.LogWrapper;
import org.apache.geode.management.internal.cli.i18n.CliStrings;
import org.apache.geode.management.internal.cli.result.ResultBuilder;

/**
 * 
 * @since GemFire 7.0
 */

public class MergeLogs {

    public static void mergeLogsInNewProcess(Path logDirectory) {
        // create a new process for merging
        LogWrapper.getInstance().fine("Exporting logs merging logs" + logDirectory);
        List<String> commandList = new ArrayList<String>();
        commandList.add(System.getProperty("java.home") + File.separatorChar + "bin" + File.separatorChar + "java");
        commandList.add("-classpath");
        commandList.add(System.getProperty("java.class.path", "."));
        commandList.add(MergeLogs.class.getName());

        commandList.add(logDirectory.toAbsolutePath().toString());

        ProcessBuilder procBuilder = new ProcessBuilder(commandList);
        StringBuilder output = new StringBuilder();
        String errorString = new String();
        try {
            LogWrapper.getInstance().fine("Exporting logs now merging logs");
            Process mergeProcess = procBuilder.redirectErrorStream(true).start();

            mergeProcess.waitFor();

            InputStream inputStream = mergeProcess.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
            String line = null;

            while ((line = br.readLine()) != null) {
                output.append(line).append(GfshParser.LINE_SEPARATOR);
            }
            mergeProcess.destroy();
        } catch (Exception e) {
            LogWrapper.getInstance().severe(e.getMessage());
        }
        if (output.toString().contains("Merged logs to: ")) {
            LogWrapper.getInstance().fine("Exporting logs Sucessfully merged logs");
        } else {
            LogWrapper.getInstance().severe("Could not merge");
        }
    }

    public static void main(String[] args) {
        if (args.length < 1 || args.length > 1) {
            throw new IllegalArgumentException("Requires only 1  arguments : <targetDirName>");
        }
        try {
            String result = mergeLogFile(args[0]).getCanonicalPath();
            System.out.println("Merged logs to: " + result);
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }

    }

    protected static List<File> findLogFilesToMerge(File dir) {
        return FileUtils.listFiles(dir, new String[] { "log" }, true).stream().collect(toList());
    }

    static File mergeLogFile(String dirName) throws Exception {
        Path dir = Paths.get(dirName);
        List<File> logsToMerge = findLogFilesToMerge(dir.toFile());
        InputStream[] logFiles = new FileInputStream[logsToMerge.size()];
        String[] logFileNames = new String[logFiles.length];
        for (int i = 0; i < logsToMerge.size(); i++) {
            try {
                logFiles[i] = new FileInputStream(logsToMerge.get(i));
                logFileNames[i] = dir.relativize(logsToMerge.get(i).toPath()).toString();
            } catch (FileNotFoundException e) {
                throw new Exception(logsToMerge.get(i) + " " + CliStrings.EXPORT_LOGS__MSG__FILE_DOES_NOT_EXIST);
            }
        }

        PrintWriter mergedLog = null;
        File mergedLogFile = null;
        try {
            String mergeLog = dirName + File.separator + "merge_"
                    + new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss").format(new java.util.Date()) + ".log";
            mergedLogFile = new File(mergeLog);
            mergedLog = new PrintWriter(mergedLogFile);
            boolean flag = MergeLogFiles.mergeLogFiles(logFiles, logFileNames, mergedLog);
        } catch (FileNotFoundException e) {
            throw new Exception("FileNotFoundException in creating PrintWriter in MergeLogFiles" + e.getMessage());
        } catch (Exception e) {
            throw new Exception("Exception in creating PrintWriter in MergeLogFiles" + e.getMessage());
        }

        return mergedLogFile;
    }

}