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/*
 * Copyright 2010 Proofpoint, Inc.
 *
 * 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 io.prestosql.jdbc.$internal.airlift.log;

import java.util.IllegalFormatException;

import static java.lang.String.format;
import static java.util.Arrays.asList;
import static java.util.logging.Level.FINE;
import static java.util.logging.Level.INFO;
import static java.util.logging.Level.SEVERE;
import static java.util.logging.Level.WARNING;

public class Logger
{
    private final java.util.logging.Logger logger;

    Logger(java.util.logging.Logger logger)
    {
        this.logger = logger;
    }

    /**
     * Gets a logger named after a class' fully qualified name.
     *
     * @param clazz the class
     * @return the named logger
     */
    public static Logger get(Class clazz)
    {
        return get(clazz.getName());
    }

    /**
     * Gets a named logger
     *
     * @param name the name of the logger
     * @return the named logger
     */
    public static Logger get(String name)
    {
        java.util.logging.Logger logger = java.util.logging.Logger.getLogger(name);
        return new Logger(logger);
    }

    /**
     * Logs a message at DEBUG level.
     *
     * @param exception an exception associated with the debug message being logged
     * @param message a literal message to log
     */
    public void debug(Throwable exception, String message)
    {
        logger.log(FINE, message, exception);
    }

    /**
     * Logs a message at DEBUG level.
     *
     * @param message a literal message to log
     */
    public void debug(String message)
    {
        logger.fine(message);
    }

    /**
     * Logs a message at DEBUG level.
     * 

* Usage example: *

     *    logger.debug("value is %s (%d ms)", value, time);
     * 
* If the format string is invalid or the arguments are insufficient, an error will be logged and execution * will continue. * * @param format a format string compatible with String.format() * @param args arguments for the format string */ public void debug(String format, Object... args) { if (logger.isLoggable(FINE)) { String message; try { message = format(format, args); } catch (IllegalFormatException e) { logger.log(SEVERE, illegalFormatMessageFor("DEBUG", format, args), e); message = rawMessageFor(format, args); } logger.fine(message); } } /** * Logs a message at DEBUG level. *

* Usage example: *

     *    logger.debug(e, "value is %s (%d ms)", value, time);
     * 
* If the format string is invalid or the arguments are insufficient, an error will be logged and execution * will continue. * * @param exception an exception associated with the debug message being logged * @param format a format string compatible with String.format() * @param args arguments for the format string */ public void debug(Throwable exception, String format, Object... args) { if (logger.isLoggable(FINE)) { String message; try { message = format(format, args); } catch (IllegalFormatException e) { logger.log(SEVERE, illegalFormatMessageFor("DEBUG", format, args), e); message = rawMessageFor(format, args); } logger.log(FINE, message, exception); } } /** * Logs a message at INFO level. * * @param message a literal message to log */ public void info(String message) { logger.info(message); } /** * Logs a message at INFO level. *

* Usage example: *

     *    logger.info("value is %s (%d ms)", value, time);
     * 
* If the format string is invalid or the arguments are insufficient, an error will be logged and execution * will continue. * * @param format a format string compatible with String.format() * @param args arguments for the format string */ public void info(String format, Object... args) { if (logger.isLoggable(INFO)) { String message; try { message = format(format, args); } catch (IllegalFormatException e) { logger.log(SEVERE, illegalFormatMessageFor("INFO", format, args), e); message = rawMessageFor(format, args); } logger.info(message); } } /** * Logs a message at WARN level. * * @param exception an exception associated with the warning being logged * @param message a literal message to log */ public void warn(Throwable exception, String message) { logger.log(WARNING, message, exception); } /** * Logs a message at WARN level. * * @param message a literal message to log */ public void warn(String message) { logger.warning(message); } /** * Logs a message at WARN level. *

* Usage example: *

     *    logger.warn(e, "something bad happened when connecting to %s:%d", host, port);
     * 
* If the format string is invalid or the arguments are insufficient, an error will be logged and execution * will continue. * * @param exception an exception associated with the warning being logged * @param format a format string compatible with String.format() * @param args arguments for the format string */ public void warn(Throwable exception, String format, Object... args) { if (logger.isLoggable(WARNING)) { String message; try { message = format(format, args); } catch (IllegalFormatException e) { logger.log(SEVERE, illegalFormatMessageFor("WARN", format, args), e); message = rawMessageFor(format, args); } logger.log(WARNING, message, exception); } } /** * Logs a message at WARN level. *

* Usage example: *

     *    logger.warn("something bad happened when connecting to %s:%d", host, port);
     * 
* If the format string is invalid or the arguments are insufficient, an error will be logged and execution * will continue. * * @param format a format string compatible with String.format() * @param args arguments for the format string */ public void warn(String format, Object... args) { warn(null, format, args); } /** * Logs a message at ERROR level. * * @param exception an exception associated with the error being logged * @param message a literal message to log */ public void error(Throwable exception, String message) { logger.log(SEVERE, message, exception); } /** * Logs a message at ERROR level. * * @param message a literal message to log */ public void error(String message) { logger.severe(message); } /** * Logs a message at ERROR level. *

* Usage example: *

     *    logger.error(e, "something really bad happened when connecting to %s:%d", host, port);
     * 
* If the format string is invalid or the arguments are insufficient, an error will be logged and execution * will continue. * * @param exception an exception associated with the error being logged * @param format a format string compatible with String.format() * @param args arguments for the format string */ public void error(Throwable exception, String format, Object... args) { if (logger.isLoggable(SEVERE)) { String message; try { message = format(format, args); } catch (IllegalFormatException e) { logger.log(SEVERE, illegalFormatMessageFor("ERROR", format, args), e); message = rawMessageFor(format, args); } logger.log(SEVERE, message, exception); } } /** * Logs a message at ERROR level. The value of {@code exception.getMessage()} will be used as the log message. *

* Usage example: *

     *    logger.error(e);
     * 
* * @param exception an exception associated with the error being logged */ public void error(Throwable exception) { if (logger.isLoggable(SEVERE)) { logger.log(SEVERE, exception.getMessage(), exception); } } /** * Logs a message at ERROR level. *

* Usage example: *

     *    logger.error("something really bad happened when connecting to %s:%d", host, port);
     * 
* If the format string is invalid or the arguments are insufficient, an error will be logged and execution * will continue. * * @param format a format string compatible with String.format() * @param args arguments for the format string */ public void error(String format, Object... args) { error(null, format, args); } public boolean isDebugEnabled() { return logger.isLoggable(FINE); } public boolean isInfoEnabled() { return logger.isLoggable(INFO); } private String illegalFormatMessageFor(String level, String message, Object... args) { return format("Invalid format string while trying to log: %s '%s' %s", level, message, asList(args)); } private String rawMessageFor(String format, Object... args) { return format("'%s' %s", format, asList(args)); } }




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