/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.karaf.main.util;
import java.io.BufferedOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.felix.utils.properties.Properties;
import org.apache.felix.utils.properties.InterpolationHelper;
import java.util.Arrays;
import java.util.List;
import java.util.logging.ConsoleHandler;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
import java.util.logging.StreamHandler;
/**
* Convenience class for configuring java.util.logging to append to
* the configured log4j log. This could be used for bootstrap logging
* prior to start of the framework.
*
*/
public class BootstrapLogManager {
private static final String KARAF_BOOTSTRAP_LOG = "karaf.bootstrap.log";
private static final String LOG4J_APPENDER_FILE = "log4j.appender.out.file";
private static BootstrapLogManager instance;
private Handler handler;
private Properties configProps;
private String log4jConfigPath;
public BootstrapLogManager(Properties configProps, String log4jConfigPath) {
this.configProps = configProps;
this.log4jConfigPath = log4jConfigPath;
this.handler = null;
}
public static synchronized Handler getDefaultHandler() {
if (instance == null) {
throw new IllegalStateException("Properties must be set before calling getDefaultHandler");
}
return instance.getDefaultHandlerInternal();
}
public static synchronized List<Handler> getDefaultHandlers() {
if (instance == null) {
throw new IllegalStateException("Properties must be set before calling getDefaultHandler");
}
return instance.getDefaultHandlersInternal();
}
public static void configureLogger(Logger logger) {
try {
for (Handler handler : getDefaultHandlers()) {
logger.addHandler(handler);
}
} catch (Exception e){
e.printStackTrace();
}
}
public static void setProperties(Properties configProps) {
setProperties(configProps, null);
}
public static void setProperties(Properties configProps, String log4jConfigPath) {
instance = new BootstrapLogManager(configProps, log4jConfigPath);
}
private Handler getDefaultHandlerInternal() {
if (handler != null) {
return handler;
}
String filename = getLogFilePath();
filename = InterpolationHelper.substVars(filename, LOG4J_APPENDER_FILE, null, configProps);
File logFile = new File(filename);
try {
return new SimpleFileHandler(logFile);
} catch (IOException e) {
throw new RuntimeException(e.getMessage(), e);
}
}
private List<Handler> getDefaultHandlersInternal() {
String consoleLevel = System.getProperty("karaf.log.console", "OFF");
ConsoleHandler handler = new ConsoleHandler();
handler.setLevel(Level.parse(consoleLevel));
return Arrays.asList(handler, getDefaultHandlerInternal());
}
private Properties loadPaxLoggingConfig() {
Properties props = new Properties();
FileInputStream fis = null;
try {
fis = new FileInputStream(log4jConfigPath);
props.load(fis);
} catch (Exception e) {
// Ignore
} finally {
close(fis);
}
return props;
}
private static void close(Closeable closeable) {
try {
if (closeable != null) {
closeable.close();
}
} catch (IOException e) {
// Ignore
}
}
String getLogFilePath() {
String filename = configProps == null ? null : configProps.getProperty(KARAF_BOOTSTRAP_LOG);
if (filename != null) {
return filename;
}
Properties props = loadPaxLoggingConfig();
// Make a best effort to log to the default file appender configured for log4j
return props.getProperty(LOG4J_APPENDER_FILE, "${karaf.data}/log/karaf.log");
}
/**
* Implementation of java.util.logging.Handler that does simple appending
* to a named file. Should be able to use this for bootstrap logging
* via java.util.logging prior to startup of pax logging.
*/
public static class SimpleFileHandler extends StreamHandler {
public SimpleFileHandler (File file) throws IOException {
open(file, true);
}
private void open (File logfile, boolean append) throws IOException {
if (!logfile.getParentFile().exists()) {
try {
logfile.getParentFile().mkdirs();
} catch (SecurityException se) {
throw new IOException(se.getMessage());
}
}
FileOutputStream fout = new FileOutputStream(logfile, append);
BufferedOutputStream out = new BufferedOutputStream(fout);
setOutputStream(out);
}
public synchronized void publish (LogRecord record) {
if (!isLoggable(record)) {
return;
}
super.publish(record);
flush();
}
}
}