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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.thrift.protocol;
import org.apache.thrift.transport.TTransport;
/**
* TMultiplexedProtocol is a protocol-independent concrete decorator that allows a Thrift
* client to communicate with a multiplexing Thrift server, by prepending the service name
* to the function name during function calls.
*
* NOTE: THIS IS NOT TO BE USED BY SERVERS.
* On the server, use TMultiplexedProcessor to handle requests from a multiplexing client.
*
* This example uses a single socket transport to invoke two services:
*
* TSocket transport = new TSocket("localhost", 9090);
* transport.open();
*
* TBinaryProtocol protocol = new TBinaryProtocol(transport);
*
* TMultiplexedProtocol mp = new TMultiplexedProtocol(protocol, "Calculator");
* Calculator.Client service = new Calculator.Client(mp);
*
* TMultiplexedProtocol mp2 = new TMultiplexedProtocol(protocol, "WeatherReport");
* WeatherReport.Client service2 = new WeatherReport.Client(mp2);
*
* System.out.println(service.add(2,2));
* System.out.println(service2.getTemperature());
*
*/
class TMultiplexedProtocol extends TProtocolDecorator {
/** Used to delimit the service name from the function name */
public static inline var SEPARATOR : String = ":";
private var service : String;
/**
* Wrap the specified protocol, allowing it to be used to communicate with a
* multiplexing server. The <code>serviceName</code> is required as it is
* prepended to the message header so that the multiplexing server can broker
* the function call to the proper service.
*
* Args:
* protocol Your communication protocol of choice, e.g. TBinaryProtocol
* serviceName The service name of the service communicating via this protocol.
*/
public function new( protocol : TProtocol, serviceName : String) {
super( protocol);
service = serviceName;
}
/**
* Prepends the service name to the function name, separated by TMultiplexedProtocol.SEPARATOR.
* Args:
* tMessage The original message.
*/
public override function writeMessageBegin( message : TMessage) : Void {
switch( message.type)
{
case TMessageType.CALL:
super.writeMessageBegin(new TMessage(
service + SEPARATOR + message.name,
message.type,
message.seqid));
case TMessageType.ONEWAY:
super.writeMessageBegin(new TMessage(
service + SEPARATOR + message.name,
message.type,
message.seqid));
default:
super.writeMessageBegin(message);
}
}
}
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