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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.qpid.management.example;
import javax.xml.namespace.QName;
import org.apache.muse.core.proxy.ProxyHandler;
import org.apache.muse.core.proxy.ReflectionProxyHandler;
import org.apache.muse.util.xml.XmlUtils;
import org.apache.muse.ws.addressing.EndpointReference;
import org.apache.muse.ws.resource.remote.WsResourceClient;
import org.apache.muse.ws.resource.sg.remote.ServiceGroupClient;
import org.w3c.dom.Element;
/**
* This example shows how to get the property value from a WS-Resource.
* First of all a request is send to WS-DM in order to get all registered WS-Resources.
* If the returned list is not empty then a GetMetadataRequest is sent to the
* first child.
* The result metadata descriptor contains all properties of the target WS-Resource.
* For each of them a GetResourcePropertyRequest is sent in order to get its value.
*
* @author Andrea Gazzarini
*/
public class GetResourcePropertyExample extends AbstractQManExample
{
/**
* First, sends a request to WS-DM Adapter in order to get the list of managed resources.
* If the list is not empty, then takes the first member and sends it a GetMetadataRequest
* in order to get its WSDL.
* After that, for each property contained in ResourceMetadataDescriptorm (RDM) a
* GetResourcePropertyRequest is sent in order to get its value.
*
* @param host the host where QMan is running.
* @param port the port where QMan is running.
* @throws Exception when the example fails (not at application level).
*/
void executeExample(String host, int port) throws Exception
{
// 1) Creates an endpoint reference of the adapter service...
EndpointReference adapterEndpointReference = getAdapterEndpointReference(host, port);
// 2) Creates the Adapter service client...
ServiceGroupClient adapterClient = new ServiceGroupClient(adapterEndpointReference);
adapterClient.setTrace(true);
// 3) Retrieves the all registered members (QMan WS-Resources)
WsResourceClient [] resources = adapterClient.getMembers();
// Sanity check : we cannot proceed if there are no WS-Resources.
if (resources.length == 0)
{
System.out.println("----------------------------WARNING---------------------------");
System.out.println("Cannot proceed with the example... it seems");
System.out.println("that there are no managed WS-Resources on QMan.");
System.out.println("Please check QMan in order to see that it is really");
System.out.println("connected with a broker.");
System.out.println("-------------------------------------------------------------------");
System.exit(0);
}
// 4) Creates a proxy handler for service invocation.
ProxyHandler metadataProxyHandler = createProxyHandler();
// 5) ..and invokes the GetMetadata on the first member.
WsResourceClient wsResourceClient = resources[0];
wsResourceClient.setTrace(true);
// Dialect is RDM for this example
String dialect = "http://docs.oasis-open.org/wsrf/rmd-1";
Object [] inputParameters = {dialect};
// RDM is the first element of the returned array.
// The first element is a wsx:Metadata containing all resource properties.
Element [] metadata = (Element[]) wsResourceClient.invoke(metadataProxyHandler, inputParameters);
Element resourceMetadataDescriptor = metadata[0];
// 6) using XPath navigates xml in order to get the list of all properties.
Element [] properties = XmlUtils.findInSubTree(
resourceMetadataDescriptor,
new QName("http://docs.oasis-open.org/wsrf/rmd-1","Property","wsrmd"));
for (Element property : properties)
{
String attributeName = property.getAttribute("name"); // = qman:<Attribute Name>
// For this example we are only interested on qman namespace related properties...
if (attributeName.startsWith("qman"))
{
String attributeNameWithoutPrefix = attributeName.replaceFirst("qman:", ""); // = <Attribute Name>
// 7) Send a GetResourcePropertyRequest for the given attribute.
// We do nothing with the returned value(s) because it / they
// has / have already printed out (wsResourceClient.setTrace(true))
@SuppressWarnings("unused")
Element [] values = wsResourceClient.getResourceProperty(
new QName(
"http://amqp.apache.org/qpid/management/qman",
attributeNameWithoutPrefix,
"qman"));
}
}
}
/**
* Prints out a description of this example.
*/
void printOutExampleDescription()
{
System.out.println(" "+getClass().getSimpleName()+" ");
System.out.println("-------------------------------------------------------------------");
System.out.println();
System.out.println("This example shows how to get the property value");
System.out.println("from a WS-Resource.");
System.out.println("First of all a request is send to WS-DM in order to get");
System.out.println("all registered WS-Resources.");
System.out.println("If the returned list is not empty then a GetMetadataRequest");
System.out.println("to the first child.");
System.out.println("The result metadata descriptor contains all properties of");
System.out.println("the target WS-Resource.");
System.out.println("For each of them a GetResourcePropertyRequest is sent");
System.out.println(" in order to get its value.");
System.out.println();
System.out.println("-------------------------------------------------------------------");
System.out.println();
}
/**
* A proxy handler is a module needed in order to make a capability
* service invocation.
* It contains logic to serialize and deserialize request, response, input and
* output parameters during a web service invocation.
*
* @return a proxy handler.
*/
private ProxyHandler createProxyHandler()
{
ProxyHandler handler = new ReflectionProxyHandler();
handler.setAction("http://schemas.xmlsoap.org/ws/2004/09/mex/GetMetadata");
handler.setRequestName(new QName("http://schemas.xmlsoap.org/ws/2004/09/mex", "GetMetadata", PREFIX));
handler.setRequestParameterNames(new QName[]{new QName("http://schemas.xmlsoap.org/ws/2004/09/mex", "Dialect", PREFIX)});
handler.setResponseName(new QName("http://schemas.xmlsoap.org/ws/2004/09/mex", "Metadata", PREFIX));
handler.setReturnType(Element[].class);
return handler;
}
public static void main(String[] arguments)
{
new GetResourcePropertyExample().execute(arguments);
}
}
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