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