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A client library for memcached.
/**
* Copyright (C) 2006-2009 Dustin Sallings
* Copyright (C) 2009-2013 Couchbase, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
* IN THE SOFTWARE.
*/
package net.spy.memcached.compat.log;
/**
* Abstract implementation of Logger providing most of the common framework.
*/
public abstract class AbstractLogger implements Logger {
private final String name;
/**
* Instantiate the abstract logger.
*/
protected AbstractLogger(String nm) {
super();
if (nm == null) {
throw new NullPointerException("Logger name may not be null.");
}
name = nm;
}
/**
* Get the name of this logger.
*/
public String getName() {
return (name);
}
/**
* Get the throwable from the last element of this array if it is Throwable,
* else null.
*/
public Throwable getThrowable(Object[] args) {
Throwable rv = null;
if (args.length > 0) {
if (args[args.length - 1] instanceof Throwable) {
rv = (Throwable) args[args.length - 1];
}
}
return rv;
}
/**
* True if debug is enabled for this logger. Default implementation always
* returns false
*
* @return true if debug messages would be displayed
*/
public abstract boolean isDebugEnabled();
/**
* True if debug is enabled for this logger. Default implementation always
* returns false
*
* @return true if info messages would be displayed
*/
public abstract boolean isInfoEnabled();
/**
* Log a message at trace level.
*
* @param message the message to log
* @param exception the exception that caused the message to be generated
*/
public void trace(Object message, Throwable exception) {
log(Level.TRACE, message, exception);
}
/**
* Log a formatted message at trace level.
*
* @param message the message to log
* @param args the arguments for that message
*/
public void trace(String message, Object... args) {
if (isDebugEnabled()) {
trace(String.format(message, args), getThrowable(args));
}
}
/**
* Log a message at trace level.
*
* @param message the message to log
*/
public void trace(Object message) {
trace(message, null);
}
/**
* Log a message at debug level.
*
* @param message the message to log
* @param exception the exception that caused the message to be generated
*/
public void debug(Object message, Throwable exception) {
log(Level.DEBUG, message, exception);
}
/**
* Log a formatted message at debug level.
*
* @param message the message to log
* @param args the arguments for that message
*/
public void debug(String message, Object... args) {
if (isDebugEnabled()) {
debug(String.format(message, args), getThrowable(args));
}
}
/**
* Log a message at debug level.
*
* @param message the message to log
*/
public void debug(Object message) {
debug(message, null);
}
/**
* Log a message at info level.
*
* @param message the message to log
* @param exception the exception that caused the message to be generated
*/
public void info(Object message, Throwable exception) {
log(Level.INFO, message, exception);
}
/**
* Log a formatted message at info level.
*
* @param message the message to log
* @param args the arguments for that message
*/
public void info(String message, Object... args) {
if (isInfoEnabled()) {
info(String.format(message, args), getThrowable(args));
}
}
/**
* Log a message at info level.
*
* @param message the message to log
*/
public void info(Object message) {
info(message, null);
}
/**
* Log a message at warning level.
*
* @param message the message to log
* @param exception the exception that caused the message to be generated
*/
public void warn(Object message, Throwable exception) {
log(Level.WARN, message, exception);
}
/**
* Log a formatted message at debug level.
*
* @param message the message to log
* @param args the arguments for that message
*/
public void warn(String message, Object... args) {
warn(String.format(message, args), getThrowable(args));
}
/**
* Log a message at warning level.
*
* @param message the message to log
*/
public void warn(Object message) {
warn(message, null);
}
/**
* Log a message at error level.
*
* @param message the message to log
* @param exception the exception that caused the message to be generated
*/
public void error(Object message, Throwable exception) {
log(Level.ERROR, message, exception);
}
/**
* Log a formatted message at debug level.
*
* @param message the message to log
* @param args the arguments for that message
*/
public void error(String message, Object... args) {
error(String.format(message, args), getThrowable(args));
}
/**
* Log a message at error level.
*
* @param message the message to log
*/
public void error(Object message) {
error(message, null);
}
/**
* Log a message at fatal level.
*
* @param message the message to log
* @param exception the exception that caused the message to be generated
*/
public void fatal(Object message, Throwable exception) {
log(Level.FATAL, message, exception);
}
/**
* Log a formatted message at debug level.
*
* @param message the message to log
* @param args the arguments for that message
*/
public void fatal(String message, Object... args) {
fatal(String.format(message, args), getThrowable(args));
}
/**
* Log a message at fatal level.
*
* @param message the message to log
*/
public void fatal(Object message) {
fatal(message, null);
}
/**
* Log a message at the given level.
*
* @param level the level
* @param message the message
*/
public void log(Level level, Object message) {
log(level, message, null);
}
/**
* Subclasses should implement this method to determine what to do when a
* client wants to log at a particular level.
*
* @param level the level to log at (see the fields of this class)
* @param message the message to log
* @param e the exception that caused the message (or null)
*/
public abstract void log(Level level, Object message, Throwable e);
}
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