/*
* Copyright 2002-2009 the original author or authors.
*
* 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 org.springframework.jmx.export.naming;
import java.util.Hashtable;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import org.springframework.aop.support.AopUtils;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.jmx.export.metadata.JmxAttributeSource;
import org.springframework.jmx.export.metadata.ManagedResource;
import org.springframework.jmx.support.ObjectNameManager;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.StringUtils;
/**
* An implementation of the {@link ObjectNamingStrategy} interface
* that reads the <code>ObjectName</code> from the source-level metadata.
* Falls back to the bean key (bean name) if no <code>ObjectName</code>
* can be found in source-level metadata.
*
* <p>Uses the {@link JmxAttributeSource} strategy interface, so that
* metadata can be read using any supported implementation. Out of the box,
* {@link org.springframework.jmx.export.annotation.AnnotationJmxAttributeSource}
* introspects a well-defined set of Java 5 annotations that come with Spring.
*
* @author Rob Harrop
* @author Juergen Hoeller
* @since 1.2
* @see ObjectNamingStrategy
* @see org.springframework.jmx.export.annotation.AnnotationJmxAttributeSource
*/
public class MetadataNamingStrategy implements ObjectNamingStrategy, InitializingBean {
/**
* The <code>JmxAttributeSource</code> implementation to use for reading metadata.
*/
private JmxAttributeSource attributeSource;
private String defaultDomain;
/**
* Create a new <code>MetadataNamingStrategy<code> which needs to be
* configured through the {@link #setAttributeSource} method.
*/
public MetadataNamingStrategy() {
}
/**
* Create a new <code>MetadataNamingStrategy<code> for the given
* <code>JmxAttributeSource</code>.
* @param attributeSource the JmxAttributeSource to use
*/
public MetadataNamingStrategy(JmxAttributeSource attributeSource) {
Assert.notNull(attributeSource, "JmxAttributeSource must not be null");
this.attributeSource = attributeSource;
}
/**
* Set the implementation of the <code>JmxAttributeSource</code> interface to use
* when reading the source-level metadata.
*/
public void setAttributeSource(JmxAttributeSource attributeSource) {
Assert.notNull(attributeSource, "JmxAttributeSource must not be null");
this.attributeSource = attributeSource;
}
/**
* Specify the default domain to be used for generating ObjectNames
* when no source-level metadata has been specified.
* <p>The default is to use the domain specified in the bean name
* (if the bean name follows the JMX ObjectName syntax); else,
* the package name of the managed bean class.
*/
public void setDefaultDomain(String defaultDomain) {
this.defaultDomain = defaultDomain;
}
public void afterPropertiesSet() {
if (this.attributeSource == null) {
throw new IllegalArgumentException("Property 'attributeSource' is required");
}
}
/**
* Reads the <code>ObjectName</code> from the source-level metadata associated
* with the managed resource's <code>Class</code>.
*/
public ObjectName getObjectName(Object managedBean, String beanKey) throws MalformedObjectNameException {
Class managedClass = AopUtils.getTargetClass(managedBean);
ManagedResource mr = this.attributeSource.getManagedResource(managedClass);
// Check that an object name has been specified.
if (mr != null && StringUtils.hasText(mr.getObjectName())) {
return ObjectNameManager.getInstance(mr.getObjectName());
}
else {
try {
return ObjectNameManager.getInstance(beanKey);
}
catch (MalformedObjectNameException ex) {
String domain = this.defaultDomain;
if (domain == null) {
domain = ClassUtils.getPackageName(managedClass);
}
Hashtable<String, String> properties = new Hashtable<String, String>();
properties.put("type", ClassUtils.getShortName(managedClass));
properties.put("name", beanKey);
return ObjectNameManager.getInstance(domain, properties);
}
}
}
}
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