2014-02-13 :-(
_ 午後
1300 デバッグしTARI
_ [Java][Ruby][マルチスレッド][デザインパターン]Java言語で学ぶデザインパターン入門マルチスレッド編 Immutable - 壊したくとも、壊せない
インスタンスが不変であることを保証する。Synchroinze を使わずとも複数のスレッドから読まれても OK (書く手段を提供しないため)
# coding: utf-8
#
# 『増補改訂版Java言語で学ぶデザインパターン入門マルチスレッド編』 http://www.hyuki.com/dp/dp2.html
#
# Immutable - 壊したくとも、壊せない
#
require 'thread'
require 'monitor'
class Person
def initialize(name, address)
@name = name
@address = address
end
def getName()
return @name
end
def getAddress()
return @address
end
def to_s()
return "[ Person: name = #{@name} address = #{@address} ]"
end
end
class PrintPersonThread < Thread
def initialize(person, name)
@person = person
@name = name
block = Proc.new() {
while true
puts "Thread-#{@name} prints #{@person}"
end
}
super(&block)
end
end
def main(argv)
alice = Person.new("Alice", "Alaska");
th ||= []
th << PrintPersonThread.new(alice, 0)
th << PrintPersonThread.new(alice, 1)
th << PrintPersonThread.new(alice, 2)
th.each {|t| t.join() }
end
main(ARGV)
% ruby Immutable.rb Thread-0 prints [ Person: name = Alice address = Alaska ] Thread-0 prints [ Person: name = Alice address = Alaska ] Thread-0 prints [ Person: name = Alice address = Alaska ] Thread-0 prints [ Person: name = Alice address = Alaska ] Thread-1 prints [ Person: name = Alice address = Alaska ] Thread-1 prints [ Person: name = Alice address = Alaska ] Thread-1 prints [ Person: name = Alice address = Alaska ] Thread-1 prints [ Person: name = Alice address = Alaska ] Thread-1 prints [ Person: name = Alice address = Alaska ] Thread-1 prints [ Person: name = Alice address = Alaska ] Thread-1 prints [ Person: name = Alice address = Alaska ] Thread-1 prints [ Person: name = Alice address = Alaska ] Thread-1 prints [ Person: name = Alice address = Alaska ] Thread-2 prints [ Person: name = Alice address = Alaska ] Thread-2 prints [ Person: name = Alice address = Alaska ] Thread-2 prints [ Person: name = Alice address = Alaska ] Thread-2 prints [ Person: name = Alice address = Alaska ] Thread-2 prints [ Person: name = Alice address = Alaska ] Thread-2 prints [ Person: name = Alice address = Alaska ] Thread-2 prints [ Person: name = Alice address = Alaska ] 以下略
ライセンス
Copyright (C) 2002,2006 Hiroshi Yuki. http://www.hyuki.com/dp/dp2.html hyuki@hyuki.com This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution.
参考
『増補改訂版Java言語で学ぶデザインパターン入門マルチスレッド編』
4797331623
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