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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.websocket.runtime;
import org.apache.tuscany.sca.assembly.EndpointReference;
import org.apache.tuscany.sca.core.invocation.Constants;
import org.apache.tuscany.sca.core.invocation.impl.MessageImpl;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
/**
* The callback invoker is used to send asynchronous responses back to the
* browser client.
*/
public class WebsocketCallbackInvoker implements Invoker {
protected Operation operation;
protected EndpointReference endpoint;
public WebsocketCallbackInvoker(Operation operation, EndpointReference endpoint) {
this.operation = operation;
this.endpoint = endpoint;
}
public Message invoke(Message msg) {
String channelId = (String) msg.getHeaders().get(Constants.RELATES_TO);
TuscanyWebsocket websocket = WebsocketConnectionManager.getConnection(channelId);
Message response = new MessageImpl();
if (websocket == null) {
response.setBody(WebsocketStatus.CLOSED);
} else {
Object[] body = msg.getBody();
String payload = JSONUtil.encodePayload(body[0]);
String operation = msg.getTo().getURI();
WebsocketBindingMessage message = new WebsocketBindingMessage(operation, payload);
websocket.send(message);
response.setBody(WebsocketStatus.OPEN);
}
return response;
}
}
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