com.logsniffer.model.file.RollingLogsSource.java Source code

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Here is the source code for com.logsniffer.model.file.RollingLogsSource.java

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/*******************************************************************************
 * logsniffer, open source tool for viewing, monitoring and analysing log data.
 * Copyright (c) 2015 Scaleborn UG, www.scaleborn.com
 *
 * logsniffer 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.
 *
 * logsniffer 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/>.
 *******************************************************************************/
package com.logsniffer.model.file;

import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.filefilter.WildcardFileFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.logsniffer.model.Log;
import com.logsniffer.model.support.DailyRollingLog;

/**
 * Source for timestamp rolled log files with a live file where the name is
 * static. This source supports exposing of multiple logs, because logs are
 * mainly referenced by the matching live files and combined with the
 * appropriated rolled over files.
 * 
 * @author mbok
 * 
 */
@Component
public class RollingLogsSource extends AbstractTimestampRollingLogsSource {
    private final Logger logger = LoggerFactory.getLogger(getClass());

    @JsonProperty
    private String pastLogsSuffixPattern = ".*";

    /**
     * @return the pastLogsSuffixPattern
     */
    public String getPastLogsSuffixPattern() {
        return pastLogsSuffixPattern;
    }

    /**
     * @param pastLogsSuffixPattern
     *            the pastLogsSuffixPattern to set
     */
    public void setPastLogsSuffixPattern(final String pastLogsSuffixPattern) {
        this.pastLogsSuffixPattern = pastLogsSuffixPattern;
    }

    @Override
    public List<Log> getLogs() throws IOException {
        final List<Log> logs = super.getLogs();
        final List<Log> rollingLogs = new ArrayList<Log>(logs.size());
        for (int i = 0; i < logs.size(); i++) {
            final Log liveLog = logs.get(i);
            logger.debug("Adapting live log to rolling log: {}", liveLog);
            rollingLogs.add(new DailyRollingLog(liveLog.getName(), liveLog.getPath(), liveLog,
                    getPastLogs(liveLog.getPath())));
        }
        return rollingLogs;
    }

    protected Log[] getPastLogs(final String liveLog) throws IOException {
        final File dir = new File(FilenameUtils.getFullPathNoEndSeparator(liveLog));
        final String pastPattern = FilenameUtils.getName(liveLog) + getPastLogsSuffixPattern();
        final FileFilter fileFilter = new WildcardFileFilter(pastPattern);
        final File[] files = dir.listFiles(fileFilter);
        final FileLog[] logs = new FileLog[files.length];
        Arrays.sort(files, getPastLogsType().getPastComparator());
        int i = 0;
        for (final File file : files) {
            // TODO Decouple direct file log association
            logs[i++] = new FileLog(file);
        }
        logger.debug("Found {} past logs for {} with pattern {}", logs.length, liveLog, pastPattern);
        return logs;
    }

    @Override
    public Log getLog(final String path) throws IOException {
        final Log liveLog = super.getLog(path);
        if (liveLog != null) {
            logger.debug("Adapting live log to rolling log: {}", liveLog);
            return new DailyRollingLog(liveLog.getName(), liveLog.getPath(), liveLog,
                    getPastLogs(liveLog.getPath()));
        } else {
            return null;
        }
    }
}