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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.tuscany.sca.binding.hazelcast;
import java.io.IOException;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.FutureTask;
import javax.xml.namespace.QName;
import org.apache.tuscany.sca.common.xml.dom.DOMHelper;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.util.FaultException;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.invocation.MessageFactory;
import org.apache.tuscany.sca.registry.hazelcast.HazelcastDomainRegistry;
import org.apache.tuscany.sca.runtime.DomainRegistryFactory;
import org.apache.tuscany.sca.runtime.DomainRegistry;
import org.apache.tuscany.sca.runtime.ExtensibleDomainRegistryFactory;
import org.oasisopen.sca.ServiceRuntimeException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;
import com.hazelcast.core.DistributedTask;
import com.hazelcast.core.Member;
public class ReferenceInvoker implements Invoker {
HazelcastDomainRegistry hzRegistry;
DOMHelper domHelper;
String serviceURI;
private Operation operation;
MessageFactory messageFactory;
public ReferenceInvoker(ExtensionPointRegistry extensionsRegistry, String serviceURI, Operation operation) {
this.serviceURI = serviceURI;
this.operation = operation;
DomainRegistryFactory domainRegistryFactory = ExtensibleDomainRegistryFactory.getInstance(extensionsRegistry);
for (DomainRegistry r : domainRegistryFactory.getEndpointRegistries()) {
if (r instanceof HazelcastDomainRegistry) {
hzRegistry = (HazelcastDomainRegistry)r;
break;
}
}
this.domHelper = DOMHelper.getInstance(extensionsRegistry);
FactoryExtensionPoint modelFactories = extensionsRegistry.getExtensionPoint(FactoryExtensionPoint.class);
this.messageFactory = modelFactories.getFactory(MessageFactory.class);
}
public Message invoke(Message msg) {
Member owningMember = hzRegistry.getOwningMember(serviceURI);
if (owningMember == null) {
throw new ServiceRuntimeException("service not found: " + serviceURI);
}
String requestXML = getRequestXML(msg);
Callable<String> callable = new ServiceInvoker(serviceURI, operation.getName(), requestXML);
FutureTask<String> task = new DistributedTask<String>(callable, owningMember);
ExecutorService executorService = getExecutorService();
executorService.execute(task);
try {
return getResponseNode(task.get());
} catch (Exception e) {
throw new ServiceRuntimeException(e);
}
}
/**
* Hazelcast ExecutorService can't nest invocations so use a separate ExecutorService
* for nested calls. See http://groups.google.com/group/hazelcast/browse_thread/thread/1cc0b943716476e9
*/
private ExecutorService getExecutorService() {
String threadName = Thread.currentThread().getName();
if (!threadName.startsWith("hz.executor.") || threadName.indexOf("binding.sca.") == -1) {
return hzRegistry.getHazelcastInstance().getExecutorService("binding.sca.1");
} else {
String oldName = threadName.substring(threadName.lastIndexOf("binding.sca."), threadName.lastIndexOf(".thread-"));
int x = Integer.parseInt(oldName.substring(oldName.lastIndexOf('.') + 1));
return hzRegistry.getHazelcastInstance().getExecutorService(oldName.substring(0, 12) + (x + 1));
}
}
private String getRequestXML(Message msg) {
Object[] args = msg.getBody();
String msgXML = domHelper.saveAsString((Node)args[0]);
return msgXML;
}
private Message getResponseNode(String responseXML) throws IOException, SAXException {
Message msg = messageFactory.createMessage();
if (responseXML.startsWith("DECLAREDEXCEPTION:")) {
Document responseDOM = domHelper.load(responseXML.substring(18));
FaultException e = new FaultException("remote exception", responseDOM);
Node node = ((Node)responseDOM).getFirstChild();
e.setFaultName(new QName(node.getNamespaceURI(), node.getLocalName()));
msg.setFaultBody(e);
} else if (responseXML.startsWith("EXCEPTION:")) {
throw new ServiceRuntimeException("Remote exception:" + responseXML.substring(10));
} else {
Document responseDOM = domHelper.load(responseXML);
msg.setBody(responseDOM);
}
return msg;
}
}
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