org.apache.tomcat.util.modeler.NotificationInfo Maven / Gradle / Ivy
/*
* 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.tomcat.util.modeler;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import javax.management.MBeanNotificationInfo;
/**
* Internal configuration information for a Notification
* descriptor.
*
* @author Craig R. McClanahan
*/
public class NotificationInfo extends FeatureInfo {
private static final long serialVersionUID = -6319885418912650856L;
// ----------------------------------------------------- Instance Variables
/**
* The ModelMBeanNotificationInfo object that corresponds
* to this NotificationInfo instance.
*/
transient MBeanNotificationInfo info = null;
protected String notifTypes[] = new String[0];
protected final ReadWriteLock notifTypesLock = new ReentrantReadWriteLock();
// ------------------------------------------------------------- Properties
/**
* Override the description property setter.
*
* @param description The new description
*/
@Override
public void setDescription(String description) {
super.setDescription(description);
this.info = null;
}
/**
* Override the name property setter.
*
* @param name The new name
*/
@Override
public void setName(String name) {
super.setName(name);
this.info = null;
}
/**
* @return the set of notification types for this MBean.
*/
public String[] getNotifTypes() {
Lock readLock = notifTypesLock.readLock();
readLock.lock();
try {
return this.notifTypes;
} finally {
readLock.unlock();
}
}
// --------------------------------------------------------- Public Methods
/**
* Add a new notification type to the set managed by an MBean.
*
* @param notifType The new notification type
*/
public void addNotifType(String notifType) {
Lock writeLock = notifTypesLock.writeLock();
writeLock.lock();
try {
String results[] = new String[notifTypes.length + 1];
System.arraycopy(notifTypes, 0, results, 0, notifTypes.length);
results[notifTypes.length] = notifType;
notifTypes = results;
this.info = null;
} finally {
writeLock.unlock();
}
}
/**
* Create and return a ModelMBeanNotificationInfo object that
* corresponds to the attribute described by this instance.
* @return the notification info
*/
public MBeanNotificationInfo createNotificationInfo() {
// Return our cached information (if any)
if (info != null) {
return info;
}
// Create and return a new information object
info = new MBeanNotificationInfo
(getNotifTypes(), getName(), getDescription());
//Descriptor descriptor = info.getDescriptor();
//addFields(descriptor);
//info.setDescriptor(descriptor);
return info;
}
/**
* Return a string representation of this notification descriptor.
*/
@Override
public String toString() {
StringBuilder sb = new StringBuilder("NotificationInfo[");
sb.append("name=");
sb.append(name);
sb.append(", description=");
sb.append(description);
sb.append(", notifTypes=");
Lock readLock = notifTypesLock.readLock();
readLock.lock();
try {
sb.append(notifTypes.length);
} finally {
readLock.unlock();
}
sb.append(']');
return sb.toString();
}
}