hbase/bin/thread-pool.rb

51 lines
1.5 KiB
Ruby

# 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.
#
# File passed to org.jruby.Main by bin/hbase. Pollutes jirb with hbase imports
# and hbase commands and then loads jirb. Outputs a banner that tells user
# where to find help, shell version, and loads up a custom hirb.
require 'thread'
class ThreadPool
def initialize(poolsize)
@queue = Queue.new
@poolsize = poolsize
@pool = Array.new(@poolsize) do |i|
Thread.new do
Thread.current[:id] = i
catch(:close) do
loop do
job, args = @queue.pop
job.call(*args)
end
end
end
end
end
def launch(*args, &block)
@queue << [block, args]
end
def stop
@poolsize.times do
launch { throw :close }
end
@pool.map(&:join)
end
end