--- /dev/null
+/**
+ * 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.
+ *
+ * Contains some contributions under the Thrift Software License.
+ * Please see doc/old-thrift-license.txt in the Thrift distribution for
+ * details.
+ */
+
+using System;
+using System.Threading;
+using Thrift.Protocol;
+using Thrift.Transport;
+
+namespace Thrift.Server
+{
+ /// <summary>
+ /// Server that uses C# built-in ThreadPool to spawn threads when handling requests.
+ /// </summary>
+ public class TThreadPoolServer : TServer
+ {
+ private const int DEFAULT_MIN_THREADS = -1; // use .NET ThreadPool defaults
+ private const int DEFAULT_MAX_THREADS = -1; // use .NET ThreadPool defaults
+ private volatile bool stop = false;
+
+ public struct Configuration
+ {
+ public int MinWorkerThreads;
+ public int MaxWorkerThreads;
+ public int MinIOThreads;
+ public int MaxIOThreads;
+
+ public Configuration(int min = DEFAULT_MIN_THREADS, int max = DEFAULT_MAX_THREADS)
+ {
+ MinWorkerThreads = min;
+ MaxWorkerThreads = max;
+ MinIOThreads = min;
+ MaxIOThreads = max;
+ }
+
+ public Configuration(int minWork, int maxWork, int minIO, int maxIO)
+ {
+ MinWorkerThreads = minWork;
+ MaxWorkerThreads = maxWork;
+ MinIOThreads = minIO;
+ MaxIOThreads = maxIO;
+ }
+ }
+
+ public TThreadPoolServer(TProcessor processor, TServerTransport serverTransport)
+ : this(new TSingletonProcessorFactory(processor), serverTransport,
+ new TTransportFactory(), new TTransportFactory(),
+ new TBinaryProtocol.Factory(), new TBinaryProtocol.Factory(),
+ new Configuration(), DefaultLogDelegate)
+ {
+ }
+
+ public TThreadPoolServer(TProcessor processor, TServerTransport serverTransport, LogDelegate logDelegate)
+ : this(new TSingletonProcessorFactory(processor), serverTransport,
+ new TTransportFactory(), new TTransportFactory(),
+ new TBinaryProtocol.Factory(), new TBinaryProtocol.Factory(),
+ new Configuration(), logDelegate)
+ {
+ }
+
+ public TThreadPoolServer(TProcessor processor,
+ TServerTransport serverTransport,
+ TTransportFactory transportFactory,
+ TProtocolFactory protocolFactory)
+ : this(new TSingletonProcessorFactory(processor), serverTransport,
+ transportFactory, transportFactory,
+ protocolFactory, protocolFactory,
+ new Configuration(), DefaultLogDelegate)
+ {
+ }
+
+ public TThreadPoolServer(TProcessorFactory processorFactory,
+ TServerTransport serverTransport,
+ TTransportFactory transportFactory,
+ TProtocolFactory protocolFactory)
+ : this(processorFactory, serverTransport,
+ transportFactory, transportFactory,
+ protocolFactory, protocolFactory,
+ new Configuration(), DefaultLogDelegate)
+ {
+ }
+
+ public TThreadPoolServer(TProcessorFactory processorFactory,
+ TServerTransport serverTransport,
+ TTransportFactory inputTransportFactory,
+ TTransportFactory outputTransportFactory,
+ TProtocolFactory inputProtocolFactory,
+ TProtocolFactory outputProtocolFactory,
+ int minThreadPoolThreads, int maxThreadPoolThreads, LogDelegate logDel)
+ : this(processorFactory, serverTransport, inputTransportFactory, outputTransportFactory,
+ inputProtocolFactory, outputProtocolFactory,
+ new Configuration(minThreadPoolThreads, maxThreadPoolThreads),
+ logDel)
+ {
+ }
+
+ public TThreadPoolServer(TProcessorFactory processorFactory,
+ TServerTransport serverTransport,
+ TTransportFactory inputTransportFactory,
+ TTransportFactory outputTransportFactory,
+ TProtocolFactory inputProtocolFactory,
+ TProtocolFactory outputProtocolFactory,
+ Configuration threadConfig,
+ LogDelegate logDel)
+ : base(processorFactory, serverTransport, inputTransportFactory, outputTransportFactory,
+ inputProtocolFactory, outputProtocolFactory, logDel)
+ {
+ lock (typeof(TThreadPoolServer))
+ {
+ if ((threadConfig.MaxWorkerThreads > 0) || (threadConfig.MaxIOThreads > 0))
+ {
+ int work, comm;
+ ThreadPool.GetMaxThreads(out work, out comm);
+ if (threadConfig.MaxWorkerThreads > 0)
+ work = threadConfig.MaxWorkerThreads;
+ if (threadConfig.MaxIOThreads > 0)
+ comm = threadConfig.MaxIOThreads;
+ if (!ThreadPool.SetMaxThreads(work, comm))
+ throw new Exception("Error: could not SetMaxThreads in ThreadPool");
+ }
+
+ if ((threadConfig.MinWorkerThreads > 0) || (threadConfig.MinIOThreads > 0))
+ {
+ int work, comm;
+ ThreadPool.GetMinThreads(out work, out comm);
+ if (threadConfig.MinWorkerThreads > 0)
+ work = threadConfig.MinWorkerThreads;
+ if (threadConfig.MinIOThreads > 0)
+ comm = threadConfig.MinIOThreads;
+ if (!ThreadPool.SetMinThreads(work, comm))
+ throw new Exception("Error: could not SetMinThreads in ThreadPool");
+ }
+ }
+ }
+
+
+ /// <summary>
+ /// Use new ThreadPool thread for each new client connection.
+ /// </summary>
+ public override void Serve()
+ {
+ try
+ {
+ serverTransport.Listen();
+ }
+ catch (TTransportException ttx)
+ {
+ logDelegate("Error, could not listen on ServerTransport: " + ttx);
+ return;
+ }
+
+ //Fire the preServe server event when server is up but before any client connections
+ if (serverEventHandler != null)
+ serverEventHandler.preServe();
+
+ while (!stop)
+ {
+ int failureCount = 0;
+ try
+ {
+ TTransport client = serverTransport.Accept();
+ ThreadPool.QueueUserWorkItem(this.Execute, client);
+ }
+ catch (TTransportException ttx)
+ {
+ if (!stop || ttx.Type != TTransportException.ExceptionType.Interrupted)
+ {
+ ++failureCount;
+ logDelegate(ttx.ToString());
+ }
+
+ }
+ }
+
+ if (stop)
+ {
+ try
+ {
+ serverTransport.Close();
+ }
+ catch (TTransportException ttx)
+ {
+ logDelegate("TServerTransport failed on close: " + ttx.Message);
+ }
+ stop = false;
+ }
+ }
+
+ /// <summary>
+ /// Loops on processing a client forever
+ /// threadContext will be a TTransport instance
+ /// </summary>
+ /// <param name="threadContext"></param>
+ private void Execute(object threadContext)
+ {
+ using (TTransport client = (TTransport)threadContext)
+ {
+ TProcessor processor = processorFactory.GetProcessor(client, this);
+ TTransport inputTransport = null;
+ TTransport outputTransport = null;
+ TProtocol inputProtocol = null;
+ TProtocol outputProtocol = null;
+ object connectionContext = null;
+ try
+ {
+ try
+ {
+ inputTransport = inputTransportFactory.GetTransport(client);
+ outputTransport = outputTransportFactory.GetTransport(client);
+ inputProtocol = inputProtocolFactory.GetProtocol(inputTransport);
+ outputProtocol = outputProtocolFactory.GetProtocol(outputTransport);
+
+ //Recover event handler (if any) and fire createContext server event when a client connects
+ if (serverEventHandler != null)
+ connectionContext = serverEventHandler.createContext(inputProtocol, outputProtocol);
+
+ //Process client requests until client disconnects
+ while (!stop)
+ {
+ if (!inputTransport.Peek())
+ break;
+
+ //Fire processContext server event
+ //N.B. This is the pattern implemented in C++ and the event fires provisionally.
+ //That is to say it may be many minutes between the event firing and the client request
+ //actually arriving or the client may hang up without ever makeing a request.
+ if (serverEventHandler != null)
+ serverEventHandler.processContext(connectionContext, inputTransport);
+ //Process client request (blocks until transport is readable)
+ if (!processor.Process(inputProtocol, outputProtocol))
+ break;
+ }
+ }
+ catch (TTransportException)
+ {
+ //Usually a client disconnect, expected
+ }
+ catch (Exception x)
+ {
+ //Unexpected
+ logDelegate("Error: " + x);
+ }
+
+ //Fire deleteContext server event after client disconnects
+ if (serverEventHandler != null)
+ serverEventHandler.deleteContext(connectionContext, inputProtocol, outputProtocol);
+
+ }
+ finally
+ {
+ //Close transports
+ if (inputTransport != null)
+ inputTransport.Close();
+ if (outputTransport != null)
+ outputTransport.Close();
+
+ // disposable stuff should be disposed
+ if (inputProtocol != null)
+ inputProtocol.Dispose();
+ if (outputProtocol != null)
+ outputProtocol.Dispose();
+ if (inputTransport != null)
+ inputTransport.Dispose();
+ if (outputTransport != null)
+ outputTransport.Dispose();
+ }
+ }
+ }
+
+ public override void Stop()
+ {
+ stop = true;
+ serverTransport.Close();
+ }
+ }
+}
projects / ceph.git / blobdiff