org.apache.geode.LogWriter Maven / Gradle / Ivy
Show all versions of geode-core Show documentation
/*
* 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.geode;
import java.util.logging.Handler;
import org.apache.geode.distributed.DistributedSystem;
import org.apache.geode.i18n.LogWriterI18n;
/**
* Defines methods available to clients that want to write a log message to their GemFire
* distributed system log file.
*
* Instances of this interface can be obtained by calling {@link DistributedSystem#getLogWriter}.
*
* For any logged message the log file will contain:
*
* - The message's level.
*
- The time the message was logged.
*
- The id of the thread that logged the message.
*
- The message itself which can be a string and/or an exception including the exception's stack
* trace.
*
*
* A message always has a level. Logging levels are ordered. Enabling logging at a given level also
* enables logging at higher levels. The higher the level the more important and urgent the message.
*
* The levels, in descending order, are:
*
* severe (highest value) is a message level indicating a serious failure. In
* general severe messages should describe events that are of considerable importance
* and which will prevent normal program execution. They should be reasonably intelligible to end
* users and to information managers.
* error In general error messages should describe events that are of
* considerable importance but will not prevent normal program execution. They should be reasonably
* intelligible to end users and to information managers. They are weaker than severe
* and stronger than warning.
* warning is a message level indicating a potential problem. In general
* warning messages should describe events that will be of interest to end users or
* information managers, or which indicate potential problems.
* info is a message level for informational messages. Typically info
* messages should be reasonably significant and should make sense to end users and system
* administrators.
* config is a message level for static configuration messages. config
* messages are intended to provide a variety of static configuration information, to assist in
* debugging problems that may be associated with particular configurations.
* fine is a message level providing tracing information. In general the
* fine level should be used for information that will be broadly interesting to
* developers. This level is for the lowest volume, and most important, tracing messages.
* finer indicates a fairly detailed tracing message. Logging calls for entering,
* returning, or throwing an exception are traced at the finer level.
* finest (lowest value) indicates a highly detailed tracing message. In general
* the finest level should be used for the most voluminous detailed tracing messages.
*
*
* For each level methods exist that will request a message, at that level, to be logged. These
* methods are all named after their level.
*
* For each level a method exists that returns a boolean indicating if messages at that level will
* currently be logged. The names of these methods are of the form:
* levelEnabled.
*
* @deprecated Please use Log4J2 instead.
*/
@Deprecated
public interface LogWriter {
/**
* Returns true if "severe" log messages are enabled. Returns false if "severe" log messages are
* disabled.
*/
boolean severeEnabled();
/**
* Writes both a message and exception to this writer. The message level is "severe".
*/
void severe(String message, Throwable throwable);
/**
* Writes a message to this writer. The message level is "severe".
*/
void severe(String message);
/**
* Writes an exception to this writer. The exception level is "severe".
*/
void severe(Throwable throwable);
/**
* Returns true if "error" log messages are enabled. Returns false if "error" log messages are
* disabled.
*/
boolean errorEnabled();
/**
* Writes both a message and exception to this writer. The message level is "error".
*/
void error(String message, Throwable throwable);
/**
* Writes a message to this writer. The message level is "error".
*/
void error(String message);
/**
* Writes an exception to this writer. The exception level is "error".
*/
void error(Throwable throwable);
/**
* Returns true if "warning" log messages are enabled. Returns false if "warning" log messages are
* disabled.
*/
boolean warningEnabled();
/**
* Writes both a message and exception to this writer. The message level is "warning".
*/
void warning(String message, Throwable throwable);
/**
* Writes a message to this writer. The message level is "warning".
*/
void warning(String message);
/**
* Writes an exception to this writer. The exception level is "warning".
*/
void warning(Throwable throwable);
/**
* Returns true if "info" log messages are enabled. Returns false if "info" log messages are
* disabled.
*/
boolean infoEnabled();
/**
* Writes both a message and exception to this writer. The message level is "information".
*/
void info(String message, Throwable throwable);
/**
* Writes a message to this writer. The message level is "information".
*/
void info(String message);
/**
* Writes an exception to this writer. The exception level is "information".
*/
void info(Throwable throwable);
/**
* Returns true if "config" log messages are enabled. Returns false if "config" log messages are
* disabled.
*/
boolean configEnabled();
/**
* Writes both a message and exception to this writer. The message level is "config".
*/
void config(String message, Throwable throwable);
/**
* Writes a message to this writer. The message level is "config".
*/
void config(String message);
/**
* Writes an exception to this writer. The exception level is "config".
*/
void config(Throwable throwable);
/**
* Returns true if "fine" log messages are enabled. Returns false if "fine" log messages are
* disabled.
*/
boolean fineEnabled();
/**
* Writes both a message and exception to this writer. The message level is "fine".
*/
void fine(String message, Throwable throwable);
/**
* Writes a message to this writer. The message level is "fine".
*/
void fine(String message);
/**
* Writes an exception to this writer. The exception level is "fine".
*/
void fine(Throwable throwable);
/**
* Returns true if "finer" log messages are enabled. Returns false if "finer" log messages are
* disabled.
*/
boolean finerEnabled();
/**
* Writes both a message and exception to this writer. The message level is "finer".
*/
void finer(String message, Throwable throwable);
/**
* Writes a message to this writer. The message level is "finer".
*/
void finer(String message);
/**
* Writes an exception to this writer. The exception level is "finer".
*/
void finer(Throwable throwable);
/**
* Log a method entry.
*
* The logging is done using the finer level. The string message will start with
* "ENTRY" and include the class and method names.
*
* @param sourceClass Name of class that issued the logging request.
* @param sourceMethod Name of the method that issued the logging request.
*/
void entering(String sourceClass, String sourceMethod);
/**
* Log a method return.
*
* The logging is done using the finer level. The string message will start with
* "RETURN" and include the class and method names.
*
* @param sourceClass Name of class that issued the logging request.
* @param sourceMethod Name of the method that issued the logging request.
*/
void exiting(String sourceClass, String sourceMethod);
/**
* Log throwing an exception.
*
* Use to log that a method is terminating by throwing an exception. The logging is done using the
* finer level.
*
* This is a convenience method that could be done instead by calling
* {@link #finer(String, Throwable)}. The string message will start with "THROW" and
* include the class and method names.
*
* @param sourceClass Name of class that issued the logging request.
* @param sourceMethod Name of the method that issued the logging request.
* @param thrown The Throwable that is being thrown.
*/
void throwing(String sourceClass, String sourceMethod, Throwable thrown);
/**
* Returns true if "finest" log messages are enabled. Returns false if "finest" log messages are
* disabled.
*/
boolean finestEnabled();
/**
* Writes both a message and exception to this writer. The message level is "finest".
*/
void finest(String message, Throwable throwable);
/**
* Writes a message to this writer. The message level is "finest".
*/
void finest(String message);
/**
* Writes an exception to this writer. The exception level is "finest".
*/
void finest(Throwable throwable);
/**
* Returns a 1.4 logging handler that can be used to direct application output to this GemFire
* logger using the standard JDK logger APIs. Each time this method is called it creates a new
* instance of a Handler so care should be taken to not call this method too often.
*/
Handler getHandler();
/**
* A mechanism for accessing the abstraction layer used for internationalization.
*/
LogWriterI18n convertToLogWriterI18n();
}