/*
* 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.sling.jmx.provider.impl;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.InstanceNotFoundException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanInfo;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import org.apache.sling.api.resource.AbstractResource;
import org.apache.sling.api.resource.ResourceMetadata;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.ValueMap;
import org.apache.sling.api.wrappers.DeepReadValueMapDecorator;
import org.apache.sling.api.wrappers.ValueMapDecorator;
public class MBeanResource extends AbstractResource {
private final String path;
private final ResourceResolver resourceResolver;
private final ResourceMetadata metadata = new ResourceMetadata();
private final MBeanInfo info;
private final ObjectName objectName;
private final String resourceType;
/** The mbean server. */
private final MBeanServer mbeanServer;
private volatile AttributeList attributeList;
public MBeanResource(final MBeanServer mbeanServer,
final ResourceResolver resolver,
final String resourceType,
final String path,
final MBeanInfo info,
final ObjectName objectName) {
this.mbeanServer = mbeanServer;
this.resourceResolver = resolver;
this.path = path;
this.info = info;
this.objectName = objectName;
final int pos = resourceType.lastIndexOf(':');
if ( pos == -1 ) {
this.resourceType = resourceType;
} else {
this.resourceType = resourceType.substring(0, pos);
}
}
public AttributeList getAttributes() {
if ( this.attributeList == null ) {
final MBeanAttributeInfo[] infos = info.getAttributes();
final String[] names = new String[infos.length];
int index = 0;
for(final MBeanAttributeInfo i : infos) {
names[index] = i.getName();
index++;
}
try {
this.attributeList = mbeanServer.getAttributes(objectName, names);
} catch (InstanceNotFoundException e) {
// ignore
this.attributeList = new AttributeList();
} catch (ReflectionException e) {
// ignore
this.attributeList = new AttributeList();
}
}
return this.attributeList;
}
/**
* @see org.apache.sling.api.resource.Resource#getPath()
*/
public String getPath() {
return this.path;
}
/**
* @see org.apache.sling.api.resource.Resource#getResourceType()
*/
public String getResourceType() {
return resourceType;
}
/**
* @see org.apache.sling.api.resource.Resource#getResourceSuperType()
*/
public String getResourceSuperType() {
return Constants.TYPE_MBEAN;
}
/**
* @see org.apache.sling.api.resource.Resource#getResourceMetadata()
*/
public ResourceMetadata getResourceMetadata() {
return metadata;
}
/**
* @see org.apache.sling.api.resource.Resource#getResourceResolver()
*/
public ResourceResolver getResourceResolver() {
return this.resourceResolver;
}
@Override
public <AdapterType> AdapterType adaptTo(final Class<AdapterType> type) {
if ( type == ValueMap.class || type == Map.class ) {
final Map<String, Object> propMap = this.getPropertiesMap();
return (AdapterType) new DeepReadValueMapDecorator(this, new ValueMapDecorator(propMap));
}
return super.adaptTo(type);
}
private Map<String, Object> getPropertiesMap() {
final Map<String, Object> result = new HashMap<String, Object>();
result.put(Constants.PROP_RESOURCE_TYPE, this.getResourceType());
result.put(Constants.PROP_RESOURCE_SUPER_TYPE, this.getResourceSuperType());
if ( this.info.getDescription() != null ) {
result.put(Constants.PROP_DESCRIPTION, this.info.getDescription());
}
result.put(Constants.PROP_CLASSNAME, this.info.getClassName());
result.put(Constants.PROP_OBJECTNAME, this.objectName.getCanonicalName());
final AttributeList values = this.getAttributes();
final Iterator iter = values.iterator();
while ( iter.hasNext() ) {
final Attribute a = (Attribute)iter.next();
final Object value = a.getValue();
if ( value != null ) {
result.put(a.getName(), value);
}
}
return result;
}
}