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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.erlang.impl;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.tuscany.sca.binding.erlang.ErlangBinding;
import org.apache.tuscany.sca.binding.erlang.impl.exceptions.ErlangException;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.runtime.RuntimeComponentService;
import com.ericsson.otp.erlang.OtpConnection;
import com.ericsson.otp.erlang.OtpSelf;
/**
* @version $Rev$ $Date$
*/
public class ErlangNode implements Runnable {
private Map<String, ErlangNodeElement> erlangModules = new HashMap<String, ErlangNodeElement>();
private ErlangNodeElement erlangMbox;
private boolean mboxNode;
private String name;
private OtpSelf self;
private ExecutorService executors;
private boolean stopRequested;
private Map<String, List<Operation>> groupedOperations;
public ErlangNode(String name) throws Exception {
this.name = name;
self = new OtpSelf(name);
boolean registered = self.publishPort();
if (!registered) {
// TODO: externalize messages?
throw new ErlangException(
"Problem with publishing service under epmd server.");
}
}
private void stop() {
stopRequested = true;
executors.shutdownNow();
}
public void run() {
executors = Executors.newFixedThreadPool(10);
while (!stopRequested) {
try {
OtpConnection connection = self.accept();
executors.execute(new ServiceExecutor(connection,
groupedOperations, erlangModules, erlangMbox));
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
}
public void registerBinding(ErlangBinding binding,
RuntimeComponentService service) throws ErlangException {
if (binding.isMbox()) {
if (mboxNode) {
// TODO: externalize message
// TODO: really want to throw exception? Log only?
throw new ErlangException("Node " + binding.getNode()
+ " already defined as mbox node");
} else {
List<Operation> operations = service.getInterfaceContract()
.getInterface().getOperations();
groupedOperations = new HashMap<String, List<Operation>>();
for (Operation operation : operations) {
List<Operation> operationsGroup = groupedOperations
.get(operation.getName());
if (operationsGroup == null) {
operationsGroup = new ArrayList<Operation>();
groupedOperations.put(operation.getName(),
operationsGroup);
}
operationsGroup.add(operation);
}
mboxNode = true;
erlangMbox = new ErlangNodeElement();
erlangMbox.setService(service);
erlangMbox.setBinding(binding);
}
} else {
if (erlangModules.containsKey(binding.getModule())) {
// TODO: externalize message
// TODO: really want to throw exception? Log only?
throw new ErlangException("Module " + binding.getModule()
+ " already defined under " + name
+ " node. Duplicate module won't be started");
} else {
if (erlangModules.size() == 0) {
// TODO: should ErlangNode manage its thread?
Thread selfThread = new Thread(this);
selfThread.start();
}
ErlangNodeElement module = new ErlangNodeElement();
module.setService(service);
module.setBinding(binding);
erlangModules.put(binding.getModule(), module);
}
}
}
public void unregisterBinding(ErlangBinding binding) throws ErlangException {
if (erlangModules.containsKey(binding.getModule())) {
erlangModules.remove(binding.getModule());
erlangModules.remove(binding.getModule());
if (erlangModules.size() == 0) {
stop();
}
}
}
}
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