org.apache.log4j.jmx.AbstractDynamicMBean Maven / Gradle / Ivy
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* 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.log4j.jmx;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Vector;
import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.DynamicMBean;
import javax.management.InstanceAlreadyExistsException;
import javax.management.InstanceNotFoundException;
import javax.management.JMException;
import javax.management.MBeanRegistration;
import javax.management.MBeanRegistrationException;
import javax.management.MBeanServer;
import javax.management.NotCompliantMBeanException;
import javax.management.ObjectName;
import javax.management.RuntimeOperationsException;
import org.apache.log4j.Logger;
import org.apache.log4j.Appender;
public abstract class AbstractDynamicMBean implements DynamicMBean,
MBeanRegistration {
String dClassName;
MBeanServer server;
private final Vector mbeanList = new Vector();
/**
* Get MBean name.
* @param appender appender, may not be null.
* @return name.
* @since 1.2.16
*/
static protected String getAppenderName(final Appender appender){
String name = appender.getName();
if (name == null || name.trim().length() == 0) {
// try to get some form of a name, because null is not allowed (exception), and empty string certainly isn't useful in JMX..
name = appender.toString();
}
return name;
}
/**
* Enables the to get the values of several attributes of the Dynamic MBean.
*/
public
AttributeList getAttributes(String[] attributeNames) {
// Check attributeNames is not null to avoid NullPointerException later on
if (attributeNames == null) {
throw new RuntimeOperationsException(
new IllegalArgumentException("attributeNames[] cannot be null"),
"Cannot invoke a getter of " + dClassName);
}
AttributeList resultList = new AttributeList();
// if attributeNames is empty, return an empty result list
if (attributeNames.length == 0)
return resultList;
// build the result attribute list
for (int i=0 ; i