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163 lines
7.4 KiB
163 lines
7.4 KiB
// serverLog.java
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// -------------------------------------
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2004
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// last major change: 04.08.2004
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.server;
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import java.text.SimpleDateFormat;
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import java.util.GregorianCalendar;
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import java.util.LinkedList;
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import java.util.TimeZone;
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public final class serverLog {
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// statics
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private static TimeZone GMTTimeZone = TimeZone.getTimeZone("PST");
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private static SimpleDateFormat longFormatter = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
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private static SimpleDateFormat shortFormatter = new SimpleDateFormat("yyyyMMddHHmmss");
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// log-level categories
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public static final int LOGLEVEL_ZERO = 0; // no output at all
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public static final int LOGLEVEL_FAILURE = 1; // system-level error, internal cause, critical and not fixeable (i.e. inconsistency)
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public static final int LOGLEVEL_ERROR = 2; // exceptional error, catcheable and non-critical (i.e. file error)
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public static final int LOGLEVEL_WARNING = 3; // uncritical service failure, may require user activity (i.e. input required, wrong authorization)
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public static final int LOGLEVEL_SYSTEM = 4; // regular system status information (i.e. start-up messages)
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public static final int LOGLEVEL_INFO = 5; // regular action information (i.e. any httpd request URL)
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public static final int LOGLEVEL_DEBUG = 6; // in-function status debug output
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// these categories are also present as character tokens
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public static final char LOGTOKEN_ZERO = 'Z';
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public static final char LOGTOKEN_FAILURE = 'F';
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public static final char LOGTOKEN_ERROR = 'E';
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public static final char LOGTOKEN_WARNING = 'W';
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public static final char LOGTOKEN_SYSTEM = 'S';
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public static final char LOGTOKEN_INFO = 'I';
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public static final char LOGTOKEN_DEBUG = 'D';
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// an array-wrapped function
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private static final char[] l2t = new char[] {
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LOGTOKEN_ZERO, LOGTOKEN_FAILURE, LOGTOKEN_ERROR, LOGTOKEN_WARNING,
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LOGTOKEN_SYSTEM, LOGTOKEN_INFO, LOGTOKEN_DEBUG
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};
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// statics
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private static serverLog genericLog = new serverLog("GENERIC", LOGLEVEL_DEBUG); // generic log
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private static LinkedList lastLog = new LinkedList(); // for Web-Interface
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private static int lastlogMaxSize = 400; // for Web-Interface
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// class variables
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private String appName;
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private int logLevel;
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public serverLog(String appName) {
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this(appName, LOGLEVEL_DEBUG);
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}
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public serverLog(String appName, int logLevel) {
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this.logLevel = logLevel;
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this.appName = appName;
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}
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public serverLog(String appName, char logToken) {
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this(appName, t2l(logToken));
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}
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public void setLoglevel(int newLevel) {
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this.logLevel = newLevel;
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}
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private static int t2l(char token) {
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switch (token) {
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case LOGTOKEN_ZERO: return LOGLEVEL_ZERO;
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case LOGTOKEN_FAILURE: return LOGLEVEL_FAILURE;
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case LOGTOKEN_ERROR: return LOGLEVEL_ERROR;
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case LOGTOKEN_WARNING: return LOGLEVEL_WARNING;
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case LOGTOKEN_SYSTEM: return LOGLEVEL_SYSTEM;
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case LOGTOKEN_INFO: return LOGLEVEL_INFO;
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case LOGTOKEN_DEBUG: return LOGLEVEL_DEBUG;
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}
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return LOGLEVEL_DEBUG;
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}
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private static String dateLongString() {
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return longFormatter.format(new GregorianCalendar(GMTTimeZone).getTime());
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}
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private static String dateShortString() {
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return shortFormatter.format(new GregorianCalendar(GMTTimeZone).getTime());
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}
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private void log(int messageLevel, String message) {
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if (messageLevel <= logLevel) {
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System.out.println(l2t[messageLevel] + " " + dateLongString() + " " + appName + " " + message);
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synchronized (lastLog) {
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lastLog.add(l2t[messageLevel] + " " + dateLongString() + " " + appName + " " + message);
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while (lastLog.size() > lastlogMaxSize) lastLog.removeFirst();
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}
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}
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}
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public static LinkedList getLastLog(){
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return lastLog;
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}
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// class log messages
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public void logFailure(String message) {log(LOGLEVEL_FAILURE, message);}
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public void logError(String message) {log(LOGLEVEL_ERROR, message);}
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public void logWarning(String message) {log(LOGLEVEL_WARNING, message);}
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public void logSystem(String message) {log(LOGLEVEL_SYSTEM, message);}
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public void logInfo(String message) {log(LOGLEVEL_INFO, message);}
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public void logDebug(String message) {log(LOGLEVEL_DEBUG, message);}
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// static log messages: log everything
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private static void log(String appName, int messageLevel, String message) {
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genericLog.appName = appName;
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genericLog.log(messageLevel, message);
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}
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public static void logFailure(String appName, String message) {log(appName, LOGLEVEL_FAILURE, message);}
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public static void logError(String appName, String message) {log(appName, LOGLEVEL_ERROR, message);}
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public static void logWarning(String appName, String message) {log(appName, LOGLEVEL_WARNING, message);}
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public static void logSystem(String appName, String message) {log(appName, LOGLEVEL_SYSTEM, message);}
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public static void logInfo(String appName, String message) {log(appName, LOGLEVEL_INFO, message);}
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public static void logDebug(String appName, String message) {log(appName, LOGLEVEL_DEBUG, message);}
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}
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