Rinda (Ruby programming language)

<h2 id="example-usage">Example usage</h2>
<p>Rinda provides a framework by which multiple Ruby processes (which or may not be running on the same machine) can add, access and modify <a href="/facts/Tuple/BI1HIxL8">tuples</a> (an ordered list of elements) stored in a shared data repository (the tuplespace).
</p><p>For example, the following program creates a new Rinda tuplespace and initializes a DRb service that waits for requests coming over the network.
</p>
require 'rinda/tuplespace'

URI = "druby://localhost:61676"
DRb.start_service(URI, Rinda::TupleSpace.new)
DRb.thread.join

<p>Using Rinda, other applications can poll the tuplespace for tuples that match specific criteria.
</p><p>For example, the program below connects to a Rinda service and listens for any tuple composed an arithmetic operator followed two numbers (such as the sequence "+ 2 4") When such a tuple is discovered the program computes the result of the mathematical operation (for example, processing "+ 2 4" into  "6") and stores it in tuplespace.
</p>
require 'rinda/rinda'

URI = "druby://localhost:61676"
DRb.start_service
ts = Rinda::TupleSpaceProxy.new(DRbObject.new(nil, URI))
loop do
  ops, a, b = ts.take([ %r{^[-+/*]$}, Numeric, Numeric])
  ts.write(["result", a.send(ops, b)])
end

<p>Finally, Rinda applications can add or remove tuples from the tuplespace.
</p><p>For instance, the following program posts prefix arithmetic tuples to the tuplespace and reads back the result (posted by the program above).
</p>
require 'rinda/rinda'

URI = "druby://localhost:61676"
DRb.start_service
ts = Rinda::TupleSpaceProxy.new(DRbObject.new(nil, URI))
tuples = [["*", 2, 2 ], [ "+", 2, 5 ], [ "-", 9, 3 ]]
tuples.each do |t|
  ts.write(t)
  res = ts.take(["result", nil])
  puts "#{res[1]} = #{t[1]} #{t[0]} #{t[2]}"
end

<h2 id="external-links">External links</h2>
<ul><li><a href="http://ruby-doc.org/stdlib/libdoc/rinda/rdoc/index.html">Ruby Standard Library Documentation for Rinda</a> <a href="https://web.archive.org/web/20100210000548/http://ruby-doc.org/stdlib/libdoc/rinda/rdoc/index.html">Archived</a> 2010-02-10 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>"Tuplespace". Ruby Application Archive (RAA). Archived from the original on 30 January 2012. Retrieved 26 October 2011. <a href="https://web.archive.org/web/20120130193351/http://raa.ruby-lang.org/project/tuplespace/" target="_blank">https://web.archive.org/web/20120130193351/http://raa.ruby-lang.org/project/tuplespace/</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
</ol>

Rinda (Ruby programming language) open-in-new

Rinda (Ruby programming language)