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/*
* Copyright 2002-2020 the original author or authors.
*
* 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
*
* https://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.springframework.core.log;
import java.util.function.Supplier;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* A convenient accessor for Commons Logging, providing not only
* {@code CharSequence} based log methods but also {@code Supplier}
* based variants for use with Java 8 lambda expressions.
*
* @author Juergen Hoeller
* @since 5.2
*/
public class LogAccessor {
private final Log log;
/**
* Create a new accessor for the given Commons Log.
* @see LogFactory#getLog(Class)
* @see LogFactory#getLog(String)
*/
public LogAccessor(Log log) {
this.log = log;
}
/**
* Create a new accessor for the specified Commons Log category.
* @see LogFactory#getLog(Class)
*/
public LogAccessor(Class logCategory) {
this.log = LogFactory.getLog(logCategory);
}
/**
* Create a new accessor for the specified Commons Log category.
* @see LogFactory#getLog(String)
*/
public LogAccessor(String logCategory) {
this.log = LogFactory.getLog(logCategory);
}
/**
* Return the target Commons Log.
*/
public final Log getLog() {
return this.log;
}
// Log level checks
/**
* Is fatal logging currently enabled?
*/
public boolean isFatalEnabled() {
return this.log.isFatalEnabled();
}
/**
* Is error logging currently enabled?
*/
public boolean isErrorEnabled() {
return this.log.isErrorEnabled();
}
/**
* Is warn logging currently enabled?
*/
public boolean isWarnEnabled() {
return this.log.isWarnEnabled();
}
/**
* Is info logging currently enabled?
*/
public boolean isInfoEnabled() {
return this.log.isInfoEnabled();
}
/**
* Is debug logging currently enabled?
*/
public boolean isDebugEnabled() {
return this.log.isDebugEnabled();
}
/**
* Is trace logging currently enabled?
*/
public boolean isTraceEnabled() {
return this.log.isTraceEnabled();
}
// Plain log methods
/**
* Log a message with fatal log level.
* @param message the message to log
*/
public void fatal(CharSequence message) {
this.log.fatal(message);
}
/**
* Log an error with fatal log level.
* @param cause the exception to log
* @param message the message to log
*/
public void fatal(Throwable cause, CharSequence message) {
this.log.fatal(message, cause);
}
/**
* Log a message with error log level.
* @param message the message to log
*/
public void error(CharSequence message) {
this.log.error(message);
}
/**
* Log an error with error log level.
* @param cause the exception to log
* @param message the message to log
*/
public void error(Throwable cause, CharSequence message) {
this.log.error(message, cause);
}
/**
* Log a message with warn log level.
* @param message the message to log
*/
public void warn(CharSequence message) {
this.log.warn(message);
}
/**
* Log an error with warn log level.
* @param cause the exception to log
* @param message the message to log
*/
public void warn(Throwable cause, CharSequence message) {
this.log.warn(message, cause);
}
/**
* Log a message with info log level.
* @param message the message to log
*/
public void info(CharSequence message) {
this.log.info(message);
}
/**
* Log an error with info log level.
* @param cause the exception to log
* @param message the message to log
*/
public void info(Throwable cause, CharSequence message) {
this.log.info(message, cause);
}
/**
* Log a message with debug log level.
* @param message the message to log
*/
public void debug(CharSequence message) {
this.log.debug(message);
}
/**
* Log an error with debug log level.
* @param cause the exception to log
* @param message the message to log
*/
public void debug(Throwable cause, CharSequence message) {
this.log.debug(message, cause);
}
/**
* Log a message with trace log level.
* @param message the message to log
*/
public void trace(CharSequence message) {
this.log.trace(message);
}
/**
* Log an error with trace log level.
* @param cause the exception to log
* @param message the message to log
*/
public void trace(Throwable cause, CharSequence message) {
this.log.trace(message, cause);
}
// Supplier-based log methods
/**
* Log a message with fatal log level.
* @param messageSupplier a lazy supplier for the message to log
*/
public void fatal(Supplier messageSupplier) {
if (this.log.isFatalEnabled()) {
this.log.fatal(LogMessage.of(messageSupplier));
}
}
/**
* Log an error with fatal log level.
* @param cause the exception to log
* @param messageSupplier a lazy supplier for the message to log
*/
public void fatal(Throwable cause, Supplier messageSupplier) {
if (this.log.isFatalEnabled()) {
this.log.fatal(LogMessage.of(messageSupplier), cause);
}
}
/**
* Log a message with error log level.
* @param messageSupplier a lazy supplier for the message to log
*/
public void error(Supplier messageSupplier) {
if (this.log.isErrorEnabled()) {
this.log.error(LogMessage.of(messageSupplier));
}
}
/**
* Log an error with error log level.
* @param cause the exception to log
* @param messageSupplier a lazy supplier for the message to log
*/
public void error(Throwable cause, Supplier messageSupplier) {
if (this.log.isErrorEnabled()) {
this.log.error(LogMessage.of(messageSupplier), cause);
}
}
/**
* Log a message with warn log level.
* @param messageSupplier a lazy supplier for the message to log
*/
public void warn(Supplier messageSupplier) {
if (this.log.isWarnEnabled()) {
this.log.warn(LogMessage.of(messageSupplier));
}
}
/**
* Log an error with warn log level.
* @param cause the exception to log
* @param messageSupplier a lazy supplier for the message to log
*/
public void warn(Throwable cause, Supplier messageSupplier) {
if (this.log.isWarnEnabled()) {
this.log.warn(LogMessage.of(messageSupplier), cause);
}
}
/**
* Log a message with info log level.
* @param messageSupplier a lazy supplier for the message to log
*/
public void info(Supplier messageSupplier) {
if (this.log.isInfoEnabled()) {
this.log.info(LogMessage.of(messageSupplier));
}
}
/**
* Log an error with info log level.
* @param cause the exception to log
* @param messageSupplier a lazy supplier for the message to log
*/
public void info(Throwable cause, Supplier messageSupplier) {
if (this.log.isInfoEnabled()) {
this.log.info(LogMessage.of(messageSupplier), cause);
}
}
/**
* Log a message with debug log level.
* @param messageSupplier a lazy supplier for the message to log
*/
public void debug(Supplier messageSupplier) {
if (this.log.isDebugEnabled()) {
this.log.debug(LogMessage.of(messageSupplier));
}
}
/**
* Log an error with debug log level.
* @param cause the exception to log
* @param messageSupplier a lazy supplier for the message to log
*/
public void debug(Throwable cause, Supplier messageSupplier) {
if (this.log.isDebugEnabled()) {
this.log.debug(LogMessage.of(messageSupplier), cause);
}
}
/**
* Log a message with trace log level.
* @param messageSupplier a lazy supplier for the message to log
*/
public void trace(Supplier messageSupplier) {
if (this.log.isTraceEnabled()) {
this.log.trace(LogMessage.of(messageSupplier));
}
}
/**
* Log an error with trace log level.
* @param cause the exception to log
* @param messageSupplier a lazy supplier for the message to log
*/
public void trace(Throwable cause, Supplier messageSupplier) {
if (this.log.isTraceEnabled()) {
this.log.trace(LogMessage.of(messageSupplier), cause);
}
}
}
