/* | |
* | |
* 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.qpid.management.domain.model; | |
import java.util.HashMap; | |
import java.util.Map; | |
import javax.management.Attribute; | |
import javax.management.AttributeList; | |
import javax.management.DynamicMBean; | |
import javax.management.MBeanInfo; | |
import javax.management.RuntimeOperationsException; | |
import org.apache.qpid.management.Messages; | |
import org.apache.qpid.management.domain.model.type.Binary; | |
import org.apache.qpid.management.domain.services.QpidService; | |
import org.apache.qpid.transport.util.Logger; | |
/** | |
* Layer supertype for QMan entities. | |
* | |
* @author Andrea Gazzarini | |
*/ | |
public abstract class QpidEntity | |
{ | |
/** | |
* Layer supertype for QMan managed bean entities. | |
* | |
* @author Andrea Gazzarini | |
*/ | |
abstract class QpidManagedEntity implements DynamicMBean | |
{ | |
// After mbean is registered with the MBean server this collection holds the mbean attribute values. | |
Map<String,Object> _attributes = new HashMap<String, Object>(); | |
/** | |
* Creates or replace the given attribute. | |
* Note that this is not part of the management interface of this object instance and therefore will be accessible only | |
* from within this class. | |
* It is used to update directly the object attributes bypassing jmx interface. | |
* | |
* @param attributeName the name of the attribute. | |
* @param property newValue the new value of the attribute. | |
*/ | |
void createOrReplaceAttributeValue(String attributeName, Object newValue) | |
{ | |
_attributes.put(attributeName, newValue); | |
} | |
/** | |
* Get the values of several attributes of the Dynamic MBean. | |
* | |
* @param attributes A list of the attributes to be retrieved. | |
* | |
* @return The list of attributes retrieved. | |
*/ | |
public AttributeList getAttributes (String[] attributes) | |
{ | |
if (attributes == null) | |
{ | |
throw new RuntimeOperationsException(new IllegalArgumentException("Attributes array must not be null")); | |
} | |
AttributeList result = new AttributeList(attributes.length); | |
for (int i = 0; i < attributes.length; i++) | |
{ | |
String attributeName = attributes[i]; | |
try | |
{ | |
result.add(new Attribute(attributeName,getAttribute(attributeName))); | |
} catch(Exception exception) | |
{ | |
// Already logged. | |
} | |
} | |
return result; | |
} | |
/** | |
* Returns metadata for this object instance. | |
*/ | |
// Developer Note : note that this metadata is a member of the outer class definition : in that way we create | |
// that metadata only once and then it will be shared between all object instances (it's a readonly object) | |
public MBeanInfo getMBeanInfo () | |
{ | |
return _metadata; | |
} | |
}; | |
final Logger _logger = Logger.get(getClass()); | |
final static JmxService JMX_SERVICE = new JmxService(); | |
final String _name; | |
final Binary _hash; | |
final QpidPackage _parent; | |
MBeanInfo _metadata; | |
final QpidService _service; | |
/** | |
* Builds a new class with the given name and package as parent. | |
* | |
* @param className the name of the class. | |
* @param hash the class schema hash. | |
* @param parentPackage the parent of this class. | |
*/ | |
QpidEntity(String className, Binary hash, QpidPackage parentPackage) | |
{ | |
this._name = className; | |
this._parent = parentPackage; | |
this._hash = hash; | |
this._service = new QpidService(_parent.getOwnerId()); | |
_logger.debug( | |
Messages.QMAN_200020_ENTITY_DEFINITION_HAS_BEEN_BUILT, | |
_parent.getOwnerId(), | |
_parent.getName(), | |
_name); | |
} | |
/** | |
* Internal method used to send a schema request for this entity. | |
* | |
* @throws Exception when the request cannot be sent. | |
*/ | |
void requestSchema() throws Exception | |
{ | |
try | |
{ | |
_service.connect(); | |
_service.requestSchema(_parent.getName(), _name, _hash); | |
_service.sync(); | |
} finally | |
{ | |
_service.close(); | |
} | |
} | |
} |