88 lines
2.9 KiB
CoffeeScript
88 lines
2.9 KiB
CoffeeScript
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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 'underscore'
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utils = require './utils'
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#-------------------------------------------------------------------------------
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module.exports = utils.registerClass class MessageQueue
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#---------------------------------------------------------------------------
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constructor: () ->
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@messages = []
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@closed = false
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@callback = null
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@timer = null
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_.bindAll @, '_timerExpired', '_updated'
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#---------------------------------------------------------------------------
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shutdown: () ->
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return if @closed
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@closed = true
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clearTimeout @timer if @timer
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@callback.call(null, @messages) if @callback
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@callback = null
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@messages = null
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@timer = null
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#---------------------------------------------------------------------------
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push: (message) ->
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return if @closed
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@messages.push message
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process.nextTick @_updated
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#---------------------------------------------------------------------------
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pullAll: (timeout, callback) ->
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return callback.call(null, null) if @closed
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return callback.call(null, []) if @callback
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if @messages.length
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callback.call(null, @messages)
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@messages = []
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return
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@callback = callback
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@timer = setTimeout @_timerExpired, timeout
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#---------------------------------------------------------------------------
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_timerExpired: () ->
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@_updated()
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#---------------------------------------------------------------------------
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_updated: () ->
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return if @closed
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return if !@callback
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callback = @callback
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messages = @messages
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clearTimeout @timer if @timer
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@callback = null
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@messages = []
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@timer = null
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callback.call(null, messages)
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