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/**
* This file is part of the CRISTAL-iSE kernel.
* Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* http://www.fsf.org/licensing/licenses/lgpl.html
*/
package com.c2kernel.utils;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.sql.Timestamp;
import java.util.HashMap;
import java.util.Iterator;
import com.c2kernel.process.AbstractMain;
import com.c2kernel.process.Gateway;
import com.c2kernel.scripting.ScriptConsole;
import com.c2kernel.utils.server.SimpleTCPIPServer;
/**
* <pre>- message string should always contain the class name and the method name: Logger.msg(1,"ItemFact::createDir() - LifeCycle DB created"); - use meaningfull abbreviation and also use the dash to separate the 'header' from the message! - each method should start with this 'method signature' debug: Logger.msg(1,"ItemFact::createDir() - path:" + path);
*</pre>
*/
public class Logger
{
/**
* logging level 0 (only error & warning) => no logging ; 9 => maximum logging
* add ten to output time before each message
*/
private static int mHighestLogLevel = 0;
private static long startTime = System.currentTimeMillis();
private static HashMap<PrintStream, Integer> logStreams = new HashMap<PrintStream, Integer>();
static protected SimpleTCPIPServer mConsole = null;
static private void printMessage(String message, int msgLogLevel)
{
synchronized(logStreams) {
for (Iterator<PrintStream> iter = logStreams.keySet().iterator(); iter.hasNext();) {
PrintStream element = iter.next();
int logLevel = logStreams.get(element);
if ( (logLevel > 9 && logLevel - 10 < msgLogLevel) ||
(msgLogLevel > 9 && logLevel < msgLogLevel - 10) ||
(logLevel < 10 && msgLogLevel < 10 && logLevel < msgLogLevel) )
continue;
if (logLevel > 9 || msgLogLevel > 9) {
message = reportTime() + " - " + message;
}
try {
element.println(message);
} catch (Exception ex) {
iter.remove();
}
}
}
}
static private String reportTime() {
long now = System.currentTimeMillis();
Timestamp ts = new Timestamp(now);
double since = (now - startTime) / 1000.0;
return ts.toString() + " ("+since+"s)";
}
static private void printMessage(Throwable ex) {
StringWriter msgString = new StringWriter();
PrintWriter msg = new PrintWriter(msgString);
msg.print(ex instanceof Exception ? "EXCEPTION:" : "JVM ERROR:");
ex.printStackTrace(msg);
printMessage(msgString.toString(), 0);
}
static public boolean doLog(int logLevel)
{
if (logLevel > 9) logLevel -= 10;
return mHighestLogLevel >= logLevel;
}
/**
* Use this only for temporary messages while developing/debugging. When the code is stable, change calls to debug to
* message/warning/error with an appropriate log level. Is is marked deprecated to highlight stray calls. This makes
* it easier to manage debug calls in the source.
*
* @param msg -
* the string to write to the console, or log file if specified in cmd line
* @deprecated
*/
@Deprecated
static public void debug(String msg)
{
msg("DEBUG : " + msg);
}
static public void debug(int logLevel, String msg)
{
msg(logLevel, "DEBUG : " + msg);
}
/**
* Use Logger.message to report information that will be useful for debugging a release
*
* @param level -
* log level of this message. If the current log level has been on the cmd line to be less that this number, the log message
* will not be displayed
* @param msg -
* the string to write to the console, or log file if specified in cmd line
*/
static public void msg(int level, String msg)
{
printMessage(msg, level);
}
static public void msg(String msg)
{
printMessage(msg, 0);
}
static public void error(String msg)
{
printMessage("ERROR : " + msg, 0);
}
static public void error(Throwable ex)
{
printMessage(ex);
}
static public void warning(String msg)
{
printMessage("WARNING: " + msg, 0);
}
static public void die(String msg)
{
printMessage("FATAL : " + msg, 0);
AbstractMain.shutdown(1);
}
/**
* @param console
*/
public static void addLogStream(PrintStream console, int logLevel) {
try {
console.println("***********************************************************");
console.println(" CRISTAL log started at level "+logLevel+" @"+new Timestamp(System.currentTimeMillis()).toString());
console.println("***********************************************************");
} catch (Exception ex) {
System.out.println("Exception accessing log stream");
ex.printStackTrace();
}
synchronized(logStreams) {
logStreams.put(console, logLevel);
if ((logLevel>10?logLevel-10:logLevel) > mHighestLogLevel) mHighestLogLevel = logLevel;
}
}
/**
* @param console
*/
public static void removeLogStream(PrintStream console) {
synchronized(logStreams) {
Integer logIntObj = logStreams.get(console);
if (logIntObj == null) return; // not registered
int logLevel = (logIntObj).intValue();
logStreams.remove(console);
// recalculate lowest log level
if (logLevel == mHighestLogLevel || (logLevel > 9 && logLevel-10 == mHighestLogLevel)) {
mHighestLogLevel = 0;
for (Integer element : logStreams.values()) {
int thisLogLevel = element>9?element-10:element;
if (thisLogLevel > mHighestLogLevel)
mHighestLogLevel = thisLogLevel;
}
}
}
}
static public void initConsole(String id)
{
int port = Gateway.getProperties().getInt(id+".Console.port", 0);
if (port == 0)
Logger.msg("No port defined for "+id+" console. Using any port.");
mConsole = new SimpleTCPIPServer(port, ScriptConsole.class, 5);
mConsole.startListening();
Gateway.getProperties().setProperty(id+".Console.port", String.valueOf(mConsole.getPort()));
}
static public int getConsolePort() {
return mConsole.getPort();
}
static public void closeConsole()
{
if (mConsole != null)
mConsole.stopListening();
}
}
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