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/*******************************************************************************
* Copyright (c) 2010 Sonatype, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sonatype, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.m2e.logback.configuration;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.util.Timer;
import java.util.TimerTask;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.slf4j.ILoggerFactory;
import org.slf4j.LoggerFactory;
import org.slf4j.helpers.SubstituteLoggerFactory;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.joran.JoranConfigurator;
import ch.qos.logback.classic.util.ContextInitializer;
import ch.qos.logback.core.joran.spi.JoranException;
import ch.qos.logback.core.util.StatusPrinter;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Plugin;
import org.eclipse.core.runtime.Status;
public class LogPlugin extends Plugin {
private static final String PLUGIN_ID = "org.eclipse.m2e.logback.configuration"; //$NON-NLS-1$
private static final String RESOURCES_PLUGIN_ID = "org.eclipse.core.resources"; //$NON-NLS-1$
// This has to match the log directory in defaultLogbackConfiguration/logback.xml
public static final String PROPERTY_LOG_DIRECTORY = "org.eclipse.m2e.log.dir"; //$NON-NLS-1$
private BundleContext bundleContext;
private boolean isConfigured;
private Timer timer = new Timer("logback configurator timer");
private TimerTask timerTask = new TimerTask() {
@SuppressWarnings("synthetic-access")
public void run() {
if(!isStateLocationInitialized()) {
return;
}
// The state location was initialized
timer.cancel();
configureLogback();
}
};
private boolean isStateLocationInitialized() {
if(!Platform.isRunning()) {
return false;
}
Bundle resourcesBundle = Platform.getBundle(RESOURCES_PLUGIN_ID);
if(resourcesBundle == null) {
return false;
}
return resourcesBundle.getState() == Bundle.ACTIVE;
}
@Override
public void start(BundleContext context) throws Exception {
super.start(context);
bundleContext = context;
if(System.getProperty(ContextInitializer.CONFIG_FILE_PROPERTY) != null) {
// The standard logback config file property is set - don't force our configuration
systemOut(ContextInitializer.CONFIG_FILE_PROPERTY + "=" //$NON-NLS-1$
+ System.getProperty(ContextInitializer.CONFIG_FILE_PROPERTY));
return;
}
if(!isStateLocationInitialized()) {
systemOut("The " + PLUGIN_ID + " bundle was activated before the state location was initialized. Will retry after the state location is initialized."); //$NON-NLS-1$ //$NON-NLS-2$
timer.schedule(timerTask, 0 /*delay*/, 50 /*period*/);
} else {
configureLogback();
}
}
private static void systemOut(String message) {
System.out.println(PLUGIN_ID + ": " + message); //$NON-NLS-1$
}
private static void systemErr(String message) {
System.err.println(PLUGIN_ID + ": " + message); //$NON-NLS-1$
}
private synchronized void configureLogback() {
if(isConfigured) {
systemOut("Logback was configured already"); //$NON-NLS-1$
return;
}
try {
File stateDir = getStateLocation().toFile();
File configFile = new File(stateDir, "logback." + bundleContext.getBundle().getVersion().toString() + ".xml"); //$NON-NLS-1$ //$NON-NLS-2$
systemOut("Logback config file: " + configFile.getAbsolutePath()); //$NON-NLS-1$
if(!configFile.isFile()) {
// Copy the default config file to the actual config file
InputStream is = bundleContext.getBundle().getEntry("defaultLogbackConfiguration/logback.xml").openStream(); //$NON-NLS-1$
try {
configFile.getParentFile().mkdirs();
FileOutputStream fos = new FileOutputStream(configFile);
try {
for(byte[] buffer = new byte[1024 * 4];;) {
int n = is.read(buffer);
if(n < 0) {
break;
}
fos.write(buffer, 0, n);
}
} finally {
fos.close();
}
} finally {
is.close();
}
}
if(System.getProperty(PROPERTY_LOG_DIRECTORY, "").length() <= 0) { //$NON-NLS-1$
System.setProperty(PROPERTY_LOG_DIRECTORY, stateDir.getAbsolutePath());
}
loadConfiguration(configFile.toURL());
isConfigured = true;
} catch(Exception e) {
e.printStackTrace();
getLog().log(new Status(IStatus.WARNING, PLUGIN_ID, "Exception while setting up logging:" + e.getMessage(), e)); //$NON-NLS-1$
return;
}
}
public static void loadConfiguration(URL configFile) throws JoranException {
ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
int i = 0;
while(loggerFactory instanceof SubstituteLoggerFactory && i < 100) {
// slf4j is initialization phase
systemOut("SLF4J logger factory class: " + loggerFactory.getClass().getName()); //$NON-NLS-1$
try {
Thread.sleep(50);
} catch(InterruptedException e) {
e.printStackTrace();
}
i++ ;
loggerFactory = LoggerFactory.getILoggerFactory();
}
if(!(loggerFactory instanceof LoggerContext)) {
if(loggerFactory == null) {
// Is it possible?
systemErr("SLF4J logger factory is null"); //$NON-NLS-1$
return;
}
systemErr("SLF4J logger factory is not an instance of LoggerContext: " //$NON-NLS-1$
+ loggerFactory.getClass().getName());
return;
}
systemOut("Initializing logback"); //$NON-NLS-1$
LoggerContext lc = (LoggerContext) loggerFactory;
lc.reset();
JoranConfigurator configurator = new JoranConfigurator();
configurator.setContext(lc);
configurator.doConfigure(configFile);
StatusPrinter.printInCaseOfErrorsOrWarnings(lc);
LogHelper.logJavaProperties(LoggerFactory.getLogger(LogPlugin.class));
}
}
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