root/kraken-core/src/main/java/org/slf4j/impl/KrakenLogger.java

/*
 * Copyright 2009 NCHOVY
 * 
 * Licensed 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.slf4j.impl;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.io.Serializable;
import java.util.Date;
import java.util.concurrent.BlockingQueue;

import org.apache.log4j.Logger;
import org.apache.log4j.Priority;
import org.osgi.framework.ServiceReference;
import org.slf4j.Marker;
import org.slf4j.helpers.MessageFormatter;

public class KrakenLogger extends org.apache.felix.framework.Logger implements org.slf4j.Logger, Serializable {
        private static final long serialVersionUID = 1L;
        private static long bootTime = System.currentTimeMillis();
        public static final String LINE_SEPARATOR = System.getProperty("line.separator");
        private static int INFO = Priority.INFO_INT;
        private static int WARN = Priority.WARN_INT;
        private static int ERROR = Priority.ERROR_INT;
        private static int DEBUG = Priority.DEBUG_INT;
        private static int TRACE = Priority.DEBUG_INT;

        private String name;
        private boolean isDebugEnabled = false;
        private boolean isTraceEnabled = false;
        private boolean isInfoEnabled = true;
        private boolean isWarnEnabled = true;
        private boolean isErrorEnabled = true;

        private BlockingQueue<KrakenLog> queue;

        public KrakenLogger(String name, BlockingQueue<KrakenLog> queue) {
                this.name = name;
                this.queue = queue;
        }

        @Override
        public void debug(String format, Object arg1, Object arg2) {
                if (isDebugEnabled)
                        formatAndLog(DEBUG, format, arg1, arg2);
        }

        @Override
        public void debug(String format, Object arg) {
                if (isDebugEnabled)
                        formatAndLog(DEBUG, format, arg, null);
        }

        @Override
        public void debug(String format, Object[] argArray) {
                if (isDebugEnabled)
                        formatAndLog(DEBUG, format, argArray);
        }

        @Override
        public void debug(String msg, Throwable t) {
                if (isDebugEnabled)
                        internalLog(DEBUG, msg, t);
        }

        @Override
        public void debug(String msg) {
                if (isDebugEnabled)
                        internalLog(DEBUG, msg, null);
        }

        @Override
        public void error(String format, Object arg1, Object arg2) {
                if (isErrorEnabled)
                        formatAndLog(ERROR, format, arg1, arg2);
        }

        @Override
        public void error(String format, Object arg) {
                if (isErrorEnabled)
                        formatAndLog(ERROR, format, arg, null);
        }

        @Override
        public void error(String format, Object[] argArray) {
                if (isErrorEnabled)
                        formatAndLog(ERROR, format, argArray);
        }

        @Override
        public void error(String msg, Throwable t) {
                if (isErrorEnabled)
                        internalLog(ERROR, msg, t);
        }

        @Override
        public void error(String msg) {
                if (isErrorEnabled)
                        internalLog(ERROR, msg, null);
        }

        @Override
        public void info(String format, Object arg1, Object arg2) {
                if (isInfoEnabled)
                        formatAndLog(INFO, format, arg1, arg2);
        }

        @Override
        public void info(String format, Object arg) {
                if (isInfoEnabled)
                        formatAndLog(INFO, format, arg, null);
        }

        @Override
        public void info(String format, Object[] argArray) {
                if (isInfoEnabled)
                        formatAndLog(INFO, format, argArray);
        }

        @Override
        public void info(String msg, Throwable t) {
                if (isInfoEnabled)
                        internalLog(INFO, msg, t);
        }

        @Override
        public void info(String msg) {
                if (isInfoEnabled)
                        internalLog(INFO, msg, null);
        }

        @Override
        public boolean isDebugEnabled() {
                return isDebugEnabled;
        }

        @Override
        public boolean isErrorEnabled() {
                return isErrorEnabled;
        }

        @Override
        public boolean isInfoEnabled() {
                return isInfoEnabled;
        }

        @Override
        public boolean isTraceEnabled() {
                return isTraceEnabled;
        }

        @Override
        public boolean isWarnEnabled() {
                return isWarnEnabled;
        }

        public void setDebugEnabled(boolean isDebugEnabled) {
                this.isDebugEnabled = isDebugEnabled;
        }

        public void setTraceEnabled(boolean isTraceEnabled) {
                this.isTraceEnabled = isTraceEnabled;
        }

        public void setInfoEnabled(boolean isInfoEnabled) {
                this.isInfoEnabled = isInfoEnabled;
        }

        public void setWarnEnabled(boolean isWarnEnabled) {
                this.isWarnEnabled = isWarnEnabled;
        }

        public void setErrorEnabled(boolean isErrorEnabled) {
                this.isErrorEnabled = isErrorEnabled;
        }

        @Override
        public void trace(String format, Object arg1, Object arg2) {
                if (isTraceEnabled)
                        formatAndLog(TRACE, format, arg1, arg2);
        }

        @Override
        public void trace(String format, Object arg) {
                if (isTraceEnabled)
                        formatAndLog(TRACE, format, arg, null);
        }

        @Override
        public void trace(String format, Object[] argArray) {
                if (isTraceEnabled)
                        formatAndLog(TRACE, format, argArray);
        }

        @Override
        public void trace(String msg, Throwable t) {
                if (isTraceEnabled)
                        internalLog(TRACE, msg, t);
        }

        @Override
        public void trace(String msg) {
                if (isTraceEnabled)
                        internalLog(TRACE, msg, null);
        }

        @Override
        public void warn(String format, Object arg1, Object arg2) {
                if (isWarnEnabled)
                        formatAndLog(WARN, format, arg1, arg2);
        }

        @Override
        public void warn(String format, Object arg) {
                if (isWarnEnabled)
                        formatAndLog(WARN, format, arg, null);
        }

        @Override
        public void warn(String format, Object[] argArray) {
                if (isWarnEnabled)
                        formatAndLog(WARN, format, argArray);
        }

        @Override
        public void warn(String msg, Throwable t) {
                if (isWarnEnabled)
                        internalLog(WARN, msg, t);
        }

        @Override
        public void warn(String msg) {
                if (isWarnEnabled)
                        internalLog(WARN, msg, null);
        }

        @SuppressWarnings("deprecation")
        private void internalLog(int level, String message, Throwable t) {
                Date date = new Date();
                Priority priority = Priority.toPriority(level);
                if (t != null) {
                        getLogger().log(priority, message + "\n" + makeStackTrace(t));
                } else {
                        getLogger().log(priority, message);
                }

                long timeOffset = System.currentTimeMillis() - bootTime;

                queue.add(new KrakenLog(name, timeOffset, date, level, message, t));
        }

        private String makeStackTrace(Throwable t) {
                if (t == null)
                        return "";
                try {
                        ByteArrayOutputStream out = new ByteArrayOutputStream();
                        t.printStackTrace(new PrintStream(out));
                        out.flush();
                        return new String(out.toByteArray());
                } catch (Exception e) {
                        return "";
                }
        }

        private Logger getLogger() {
                return Logger.getLogger(name);
        }

        /**
         * For formatted messages, first substitute arguments and then log.
         * 
         * @param level
         * @param format
         * @param param1
         * @param param2
         */
        private void formatAndLog(int level, String format, Object arg1, Object arg2) {
                String message = MessageFormatter.format(format, arg1, arg2);
                internalLog(level, message, null);
        }

        /**
         * For formatted messages, first substitute arguments and then log.
         * 
         * @param level
         * @param format
         * @param argArray
         */
        private void formatAndLog(int level, String format, Object[] argArray) {
                String message = MessageFormatter.arrayFormat(format, argArray);
                internalLog(level, message, null);
        }

        /**
         * Marker ignoring base.
         */

        @Override
        public void debug(Marker marker, String msg) {
                debug(msg);
        }

        @Override
        public void debug(Marker marker, String format, Object arg) {
                debug(format, arg);
        }

        @Override
        public void debug(Marker marker, String format, Object[] argArray) {
                debug(format, argArray);
        }

        @Override
        public void debug(Marker marker, String msg, Throwable t) {
                debug(msg, t);
        }

        @Override
        public void debug(Marker marker, String format, Object arg1, Object arg2) {
                debug(format, arg1, arg2);
        }

        @Override
        public void error(Marker marker, String msg) {
                error(msg);
        }

        @Override
        public void error(Marker marker, String format, Object arg) {
                error(format, arg);
        }

        @Override
        public void error(Marker marker, String format, Object[] argArray) {
                error(format, argArray);
        }

        @Override
        public void error(Marker marker, String msg, Throwable t) {
                error(msg, t);
        }

        @Override
        public void error(Marker marker, String format, Object arg1, Object arg2) {
                error(format, arg1, arg2);
        }

        @Override
        public void info(Marker marker, String msg) {
                info(msg);
        }

        @Override
        public void info(Marker marker, String format, Object arg) {
                info(format, arg);
        }

        @Override
        public void info(Marker marker, String format, Object[] argArray) {
                info(format, argArray);
        }

        @Override
        public void info(Marker marker, String msg, Throwable t) {
                info(msg, t);
        }

        @Override
        public void info(Marker marker, String format, Object arg1, Object arg2) {
                info(format, arg1, arg2);
        }

        @Override
        public boolean isDebugEnabled(Marker marker) {
                return isDebugEnabled;
        }

        @Override
        public boolean isErrorEnabled(Marker marker) {
                return isErrorEnabled;
        }

        @Override
        public boolean isInfoEnabled(Marker marker) {
                return isInfoEnabled;
        }

        @Override
        public boolean isTraceEnabled(Marker marker) {
                return isTraceEnabled;
        }

        @Override
        public boolean isWarnEnabled(Marker marker) {
                return isWarnEnabled;
        }

        @Override
        public void trace(Marker marker, String msg) {
                trace(msg);
        }

        @Override
        public void trace(Marker marker, String format, Object arg) {
                trace(format, arg);
        }

        @Override
        public void trace(Marker marker, String format, Object[] argArray) {
                trace(format, argArray);
        }

        @Override
        public void trace(Marker marker, String msg, Throwable t) {
                trace(msg, t);
        }

        @Override
        public void trace(Marker marker, String format, Object arg1, Object arg2) {
                trace(format, arg1, arg2);
        }

        @Override
        public void warn(Marker marker, String msg) {
                warn(msg);
        }

        @Override
        public void warn(Marker marker, String format, Object arg) {
                warn(format, arg);
        }

        @Override
        public void warn(Marker marker, String format, Object[] argArray) {
                warn(format, argArray);
        }

        @Override
        public void warn(Marker marker, String msg, Throwable t) {
                warn(msg, t);
        }

        @Override
        public void warn(Marker marker, String format, Object arg1, Object arg2) {
                warn(format, arg1, arg2);
        }

        @Override
        public String getName() {
                return name;
        }

        /**
         * for felix logger.
         */

        @Override
        protected void doLog(ServiceReference sr, int level, String msg, Throwable throwable) {
                internalLog(level, msg, throwable);
        }
}