com.builtamont.cassandra.migration.internal.util.logging.LogFactory.kt Maven / Gradle / Ivy
/**
* File : LogFactory.kt
* License :
* Original - Copyright (c) 2010 - 2016 Boxfuse GmbH
* Derivative - Copyright (c) 2016 - 2017 Citadel Technology Solutions Pte Ltd
*
* 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 com.builtamont.cassandra.migration.internal.util.logging
import com.builtamont.cassandra.migration.internal.util.logging.apachecommons.ApacheCommonsLogCreator
import com.builtamont.cassandra.migration.internal.util.logging.javautil.JavaUtilLogCreator
import com.builtamont.cassandra.migration.internal.util.logging.slf4j.Slf4jLogCreator
object LogFactory {
/**
* Factory for implementation-specific loggers.
*/
private var _logCreator: LogCreator? = null
/**
* The factory for implementation-specific loggers to be used as a fallback when no other suitable loggers were found.
*/
private var _fallbackLogCreator: LogCreator? = null
/**
* @param logCreator The factory for implementation-specific loggers.
*/
fun setLogCreator(logCreator: LogCreator) {
LogFactory._logCreator = logCreator
}
/**
* @param fallbackLogCreator The factory for implementation-specific loggers
* to be used as a fallback when no other suitable loggers were found.
*/
fun setFallbackLogCreator(fallbackLogCreator: LogCreator) {
LogFactory._fallbackLogCreator = fallbackLogCreator
}
/**
* Retrieves the matching logger for this class.
*
* @param clazz The class to get the logger for.
* @return The logger.
*/
fun getLog(clazz: Class<*>): Log {
if (_logCreator == null) {
val classLoader = Thread.currentThread().contextClassLoader
val featureDetector = com.builtamont.cassandra.migration.internal.util.FeatureDetector(classLoader)
_logCreator = when {
featureDetector.isSlf4jAvailable -> Slf4jLogCreator()
featureDetector.isApacheCommonsLoggingAvailable -> ApacheCommonsLogCreator()
_fallbackLogCreator == null -> JavaUtilLogCreator()
else -> _fallbackLogCreator
}
}
return _logCreator!!.createLogger(clazz)
}
}