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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 org.apache.tuscany.sca.binding.erlang.ErlangBinding;
import org.apache.tuscany.sca.binding.erlang.impl.types.TypeHelpersProxy;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
import com.ericsson.otp.erlang.OtpConnection;
import com.ericsson.otp.erlang.OtpEpmd;
import com.ericsson.otp.erlang.OtpErlangList;
import com.ericsson.otp.erlang.OtpErlangObject;
import com.ericsson.otp.erlang.OtpMbox;
import com.ericsson.otp.erlang.OtpMsg;
import com.ericsson.otp.erlang.OtpNode;
import com.ericsson.otp.erlang.OtpPeer;
import com.ericsson.otp.erlang.OtpSelf;
/**
* @version $Rev: $ $Date: $
*/
public class ErlangInvoker implements Invoker {
private RuntimeComponentReference reference;
private ErlangBinding binding;
private OtpNode node;
public ErlangInvoker(RuntimeComponentReference reference, ErlangBinding binding) {
this.reference = reference;
this.binding = binding;
}
private Message sendMessage(Message msg) {
OtpMbox tmpMbox = null;
try {
String nodeName = "_connector_to_" + binding.getNode();
node = new OtpNode(nodeName);
tmpMbox = node.createMbox();
Object[] args = msg.getBody();
OtpErlangObject msgPayload = TypeHelpersProxy.toErlang(args);
tmpMbox.send(msg.getOperation().getName(), binding.getNode(), msgPayload);
if (msg.getOperation().getOutputType() != null) {
OtpMsg resultMsg = tmpMbox.receiveMsg();
OtpErlangObject result = resultMsg.getMsg();
msg.setBody(TypeHelpersProxy.toJava(result, msg.getOperation().getOutputType().getPhysical()));
}
} catch (Exception e) {
msg.setFaultBody(e);
} finally {
if (tmpMbox != null) {
tmpMbox.close();
}
if (node != null) {
OtpEpmd.unPublishPort(node);
node.close();
}
}
return msg;
}
private Message invokeOperation(Message msg) {
OtpSelf self = null;
OtpPeer other = null;
OtpConnection connection = null;
try {
String nodeName = "_connector_to_" + binding.getNode();
self = new OtpSelf(nodeName);
other = new OtpPeer(binding.getNode());
connection = self.connect(other);
OtpErlangList params = TypeHelpersProxy.toErlangAsList((Object[])msg.getBody());
connection.sendRPC(binding.getModule(), msg.getOperation().getName(), params);
if (msg.getOperation().getOutputType() != null) {
OtpErlangObject result = connection.receiveRPC();
msg.setBody(TypeHelpersProxy.toJava(result, msg.getOperation().getOutputType().getPhysical()));
}
} catch (Exception e) {
msg.setFaultBody(e);
} finally {
if (connection != null) {
connection.close();
}
}
return msg;
}
/**
* @see org.apache.tuscany.sca.invocation.Invoker#invoke(org.apache.tuscany.sca.invocation.Message)
*/
public Message invoke(Message msg) {
if (binding.isMbox()) {
return sendMessage(msg);
} else {
return invokeOperation(msg);
}
}
}
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