6ab5c9334d
* Changing default timeout for start maintenance. * Upgrading dependencies to gorealis v2 and thrift 0.12.0 * Refactored to update to gorealis v2.
107 lines
3.4 KiB
ObjectPascal
107 lines
3.4 KiB
ObjectPascal
(*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*)
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unit Thrift.Protocol.Multiplex;
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interface
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uses Thrift.Protocol;
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{ TMultiplexedProtocol is a protocol-independent concrete decorator
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that allows a Thrift client to communicate with a multiplexing Thrift server,
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by prepending the service name to the function name during function calls.
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NOTE: THIS IS NOT USED BY SERVERS.
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On the server, use TMultiplexedProcessor to handle requests from a multiplexing client.
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This example uses a single socket transport to invoke two services:
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TSocket transport = new TSocket("localhost", 9090);
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transport.open();
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TBinaryProtocol protocol = new TBinaryProtocol(transport);
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TMultiplexedProtocol mp = new TMultiplexedProtocol(protocol, "Calculator");
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Calculator.Client service = new Calculator.Client(mp);
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TMultiplexedProtocol mp2 = new TMultiplexedProtocol(protocol, "WeatherReport");
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WeatherReport.Client service2 = new WeatherReport.Client(mp2);
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System.out.println(service.add(2,2));
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System.out.println(service2.getTemperature());
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}
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type
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TMultiplexedProtocol = class( TProtocolDecorator)
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public const
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{ Used to delimit the service name from the function name }
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SEPARATOR = ':';
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private
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FServiceName : String;
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public
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{ Wrap the specified protocol, allowing it to be used to communicate with a multiplexing server.
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The serviceName is required as it is prepended to the message header so that the multiplexing
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server can broker the function call to the proper service.
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Args:
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protocol ....... Your communication protocol of choice, e.g. TBinaryProtocol.
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serviceName .... The service name of the service communicating via this protocol.
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}
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constructor Create( const aProtocol : IProtocol; const aServiceName : string);
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{ Prepends the service name to the function name, separated by SEPARATOR.
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Args: The original message.
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}
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procedure WriteMessageBegin( const msg: TThriftMessage); override;
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end;
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implementation
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constructor TMultiplexedProtocol.Create(const aProtocol: IProtocol; const aServiceName: string);
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begin
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ASSERT( aServiceName <> '');
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inherited Create(aProtocol);
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FServiceName := aServiceName;
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end;
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procedure TMultiplexedProtocol.WriteMessageBegin( const msg: TThriftMessage);
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// Prepends the service name to the function name, separated by TMultiplexedProtocol.SEPARATOR.
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var newMsg : TThriftMessage;
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begin
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case msg.Type_ of
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TMessageType.Call,
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TMessageType.Oneway : begin
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Init( newMsg, FServiceName + SEPARATOR + msg.Name, msg.Type_, msg.SeqID);
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inherited WriteMessageBegin( newMsg);
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end;
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else
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inherited WriteMessageBegin( msg);
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end;
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end;
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end.
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