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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* Copyright © 2017-2018 Amdocs
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.aai.cl.eelf;
import com.att.eelf.configuration.EELFManager;
import java.util.HashMap;
import java.util.Map;
import org.onap.aai.cl.api.Logger;
import org.onap.aai.cl.api.LoggerFactoryInterface;
import org.onap.aai.cl.api.LogLine.LogLineType;
/** This is an implementation of the {@link LoggerFactoryInterface} which
* constructs a {@link Logger} implementation which is compatible with the EELF
* framework. */
public class LoggerFactory implements LoggerFactoryInterface {
/** The instance for our factory singleton. */
private static LoggerFactory instance;
/** An instance of the log factory provided by the EELF framework. We will use
* this to get an actual EELF logger instance that we will wrap within our
* own, more generalized logger. */
private EELFManager eelfManager;
/** This cache maintains a mapping of logger names to instances so that if a
* logger with the same name is requested multiple times we can return the
* same instance each time. */
private Map<String, Logger> errorLoggerCache = new HashMap<String, Logger>();
/** This cache maintains a mapping of metric logger names to instances so that
* if a logger with the same name is requested multiple times we can return
* the same instance each time. */
private Map<String, Logger> metricLoggerCache = new HashMap<String, Logger>();
/** This cache maintains a mapping of audit logger names to instances so that
* if a logger with the same name is requested multiple times we can return
* the same instance each time. */
private Map<String, Logger> auditLoggerCache = new HashMap<String, Logger>();
/** Returns the single instance of our factory singleton.
*
* @return - An instance of the {@link LoggerFactory} */
public static synchronized LoggerFactory getInstance() {
// If we don't already have an instance then create it now.
if (instance == null) {
instance = new LoggerFactory();
}
// Return our singleton instance.
return instance;
}
/**
* Instantiates a new {@link LoggerFactory}.
*/
protected LoggerFactory() {
// We need an instance of the factory provided by the EELF
// framework so that we can instantiate the EELF logger that
// we will be wrapping, so get one now.
if (eelfManager == null) {
eelfManager = EELFManager.getInstance();
}
}
/**
* (non-Javadoc)
*
* @see org.ecomp.cl.api.LoggerFactoryInterface#getLogger(java.lang.String)
*/
public Logger getLogger(String name) {
// Check the cache to see if we have already instantiated a logger
// with the supplied name.
if (!errorLoggerCache.containsKey(name)) {
// Nothing in the cache, so let's instantiate a logger now.
Logger logger = new AaiLoggerAdapter(eelfManager.getLogger(name), LogLineType.ERROR, name);
errorLoggerCache.put(name, logger);
}
// Return the requested logger instance.
return errorLoggerCache.get(name);
}
/**
* (non-Javadoc)
*
* @see org.ecomp.cl.api.LoggerFactoryInterface#getLogger(java.lang.Class)
*/
public Logger getLogger(Class<?> clazz) {
return getLogger(clazz.getName());
}
/**
* (non-Javadoc)
*
* @see org.ecomp.cl.api.LoggerFactoryInterface#getAuditLogger(java.lang.String)
*/
public Logger getAuditLogger(String name) {
// Check the cache to see if we have already instantiated a logger
// with the supplied name.
if (!auditLoggerCache.containsKey(name)) {
// Nothing in the cache, so let's instantiate a logger now.
Logger logger = new AaiLoggerAdapter(eelfManager.getAuditLogger(), LogLineType.AUDIT, name);
auditLoggerCache.put(name, logger);
}
// Return the requested logger instance.
return auditLoggerCache.get(name);
}
/**
* (non-Javadoc)
*
* @see org.ecomp.cl.api.LoggerFactoryInterface#getAuditLogger(java.lang.Class)
*/
public Logger getAuditLogger(Class<?> clazz) {
return getAuditLogger(clazz.getName());
}
/**
* (non-Javadoc)
*
* @see org.ecomp.cl.api.LoggerFactoryInterface#getMetricsLogger(java.lang.String)
*/
public Logger getMetricsLogger(String name) {
// Check the cache to see if we have already instantiated a logger
// with the supplied name.
if (!metricLoggerCache.containsKey(name)) {
// Nothing in the cache, so let's instantiate a logger now.
Logger logger = new AaiLoggerAdapter(eelfManager.getMetricsLogger(), LogLineType.METRICS,
name);
metricLoggerCache.put(name, logger);
}
// Return the requested logger instance.
return metricLoggerCache.get(name);
}
/**
* (non-Javadoc)
*
* @see org.ecomp.cl.api.LoggerFactoryInterface#getMetricsLogger(java.lang.Class)
*/
public Logger getMetricsLogger(Class<?> clazz) {
return getMetricsLogger(clazz.getName());
}
}
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