hoot.services.info.ErrorLog.java Source code

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Here is the source code for hoot.services.info.ErrorLog.java

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/*
 * This file is part of Hootenanny.
 *
 * Hootenanny is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * --------------------------------------------------------------------
 *
 * The following copyright notices are generated automatically. If you
 * have a new notice to add, please use the format:
 * " * @copyright Copyright ..."
 * This will properly maintain the copyright information. DigitalGlobe
 * copyrights will be updated automatically.
 *
 * @copyright Copyright (C) 2014, 2015 DigitalGlobe (http://www.digitalglobe.com/)
 */
package hoot.services.info;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.RandomAccessFile;
import java.io.Reader;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
import java.util.UUID;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.LineIterator;
import org.apache.commons.lang3.StringUtils;

import hoot.services.HootProperties;
import hoot.services.controllers.info.AboutResource;

public class ErrorLog {

    protected static String _errLogPath = null;
    protected static String _tempOutputPath = null;

    public ErrorLog() {
        //ErrorLogPath
        if (_errLogPath == null) {
            try {
                _errLogPath = HootProperties.getProperty("ErrorLogPath");
            } catch (IOException e) {

            }
        }

        if (_tempOutputPath == null) {
            try {
                _tempOutputPath = HootProperties.getProperty("tempOutputPath");
            } catch (IOException e) {

            }
        }
    }

    public String getErrorlog(long maxLength) throws Exception {

        File file = new File(_errLogPath);
        RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
        int lines = 0;
        StringBuilder builder = new StringBuilder();
        long length = file.length();
        //length--;

        long startOffset = 0;
        if (length > maxLength) {
            startOffset = length - maxLength;
        }
        for (long seek = startOffset; seek < length; seek++) {
            randomAccessFile.seek(seek);
            char c = (char) randomAccessFile.read();
            builder.append(c);
        }

        randomAccessFile.close();

        return builder.toString();
    }

    public String generateExportLog() throws Exception {
        String fileId = UUID.randomUUID().toString();
        String outputPath = _tempOutputPath + "/" + fileId;

        String data = "";

        AboutResource about = new AboutResource();
        VersionInfo vInfo = about.getCoreVersionInfo();
        data = "\n************ CORE VERSION INFO ***********\n";
        data += vInfo.toString();
        CoreDetail cd = about.getCoreVersionDetail();
        data += "\n************ CORE ENVIRONMENT ***********\n";
        if (cd != null) {
            data += StringUtils.join(cd.getEnvironmentInfo(), '\n');
        }

        data = "\n************ SERVICE VERSION INFO ***********\n";
        data += about.getServicesVersionInfo().toString();
        ServicesDetail sd = about.getServicesVersionDetail();
        if (sd != null) {
            data += "\n************ SERVICE DETAIL PROPERTY ***********\n";
            for (ServicesDetail.Property prop : sd.getProperties()) {
                String str = prop.getName() + " : " + prop.getValue() + "\n";
                data += str;
            }

            data += "\n************ SERVICE DETAIL RESOURCE ***********\n";
            for (ServicesDetail.ServicesResource res : sd.getResources()) {
                String str = res.getType() + " : " + res.getUrl() + "\n";
                data += str;
            }
        }

        data += "\n************ CATALINA LOG ***********\n";

        // 5MB Max
        int maxSize = 5000000;

        String logStr = getErrorlog(maxSize);

        RandomAccessFile raf = new RandomAccessFile(outputPath, "rw");
        raf.writeBytes(data + "\n" + logStr);
        raf.close();
        return outputPath;
    }
}