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ashish |
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#
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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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require 'thread'
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module Thrift
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class ThreadPoolServer < BaseServer
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def initialize(processor, server_transport, transport_factory=nil, protocol_factory=nil, num=20)
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super(processor, server_transport, transport_factory, protocol_factory)
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@thread_q = SizedQueue.new(num)
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@exception_q = Queue.new
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@running = false
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end
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## exceptions that happen in worker threads will be relayed here and
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## must be caught. 'retry' can be used to continue. (threads will
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## continue to run while the exception is being handled.)
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def rescuable_serve
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Thread.new { serve } unless @running
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@running = true
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raise @exception_q.pop
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end
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## exceptions that happen in worker threads simply cause that thread
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## to die and another to be spawned in its place.
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def serve
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@server_transport.listen
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begin
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loop do
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@thread_q.push(:token)
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Thread.new do
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begin
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loop do
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client = @server_transport.accept
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trans = @transport_factory.get_transport(client)
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prot = @protocol_factory.get_protocol(trans)
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begin
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loop do
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@processor.process(prot, prot)
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end
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rescue Thrift::TransportException, Thrift::ProtocolException => e
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ensure
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trans.close
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end
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end
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rescue => e
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@exception_q.push(e)
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ensure
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@thread_q.pop # thread died!
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end
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end
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end
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ensure
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@server_transport.close
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end
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end
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end
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end
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