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<li>lib/network/reactor.rb
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<li><a href="#method-i-register">#register</a>
<li><a href="#method-i-start">#start</a>
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<h1 class="class">class Reactor</h1>
<div id="description" class="description">
<p>The <a href="Reactor.html">Reactor</a> class defines a representation of a
multiplexer based on a non-blocking select() server.</p>
<p>The network design is based on the Mesh project NetworkService code which
was translated almost directly from C++, warts and all, which in turn is
based on Schmidt’s Acceptor/Connector/Reactor patterns which may be found
at <a
href="http://citeseer.ist.psu.edu/schmidt97acceptor.html">citeseer.ist.psu.edu/schmidt97acceptor.html</a>
for an idea of how all these classes are supposed to interelate.</p>
</div><!-- description -->
<section id="5Buntitled-5D" class="documentation-section">
<!-- Attributes -->
<section id="attribute-method-details" class="method-section section">
<h3 class="section-header">Attributes</h3>
<div id="attribute-i-port" class="method-detail">
<div class="method-heading attribute-method-heading">
<span class="method-name">port</span><span
class="attribute-access-type">[R]</span>
</div>
<div class="method-description">
</div>
</div>
<div id="attribute-i-service_filters" class="method-detail">
<div class="method-heading attribute-method-heading">
<span class="method-name">service_filters</span><span
class="attribute-access-type">[R]</span>
</div>
<div class="method-description">
</div>
</div>
<div id="attribute-i-service_io" class="method-detail">
<div class="method-heading attribute-method-heading">
<span class="method-name">service_io</span><span
class="attribute-access-type">[R]</span>
</div>
<div class="method-description">
</div>
</div>
<div id="attribute-i-service_negotiation" class="method-detail">
<div class="method-heading attribute-method-heading">
<span class="method-name">service_negotiation</span><span
class="attribute-access-type">[R]</span>
</div>
<div class="method-description">
</div>
</div>
<div id="attribute-i-service_type" class="method-detail">
<div class="method-heading attribute-method-heading">
<span class="method-name">service_type</span><span
class="attribute-access-type">[R]</span>
</div>
<div class="method-description">
</div>
</div>
</section><!-- attribute-method-details -->
<!-- Methods -->
<section id="public-class-5Buntitled-5D-method-details" class="method-section section">
<h3 class="section-header">Public Class Methods</h3>
<div id="method-c-new" class="method-detail ">
<div class="method-heading">
<span class="method-name">new</span><span
class="method-args">(service_port, service_type, service_io, service_negotiation, service_filters, address=nil)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Constructor for <a href="Reactor.html">Reactor</a></p>
<dl class="rdoc-list label-list"><dt><code>service_port</code>
<dd>
<p>The port the server will listen on or client will connect to.</p>
</dd><dt><code>service_type</code>
<dd>
<p>The type of service (:server or :client)</p>
</dd><dt><code>service_io</code>
<dd>
<p>The service io handler (:sockio, :lineio, or :packetio)</p>
</dd><dt><code>service_negotiation</code>
<dd>
<p>An array of telnet options the service will try to negotiate</p>
</dd></dl>
<pre>Valid options are
:sga, :echo, :naws, :ttype, :zmp (negotiate default)
:binary</pre>
<dl class="rdoc-list label-list"><dt><code>service_filters</code>
<dd>
<p>An array of io filters the service will use.</p>
</dd></dl>
<pre>Valid options are
:filter - attach dummy filter
:debugfilter - attach debug filter (default)
:telnetfilter - attach telnet filter (default)
:colorfilter - attach color filter (default)
:terminalfilter - attach terminal filter</pre>
<dl class="rdoc-list label-list"><dt><code>address</code>
<dd>
<p>Optional address for outgoing connection.</p>
</dd></dl>
<div class="method-source-code" id="new-source">
<pre><span class="ruby-comment"># File lib/network/reactor.rb, line 55</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">service_port</span>, <span class="ruby-identifier">service_type</span>, <span class="ruby-identifier">service_io</span>, <span class="ruby-identifier">service_negotiation</span>,
<span class="ruby-identifier">service_filters</span>, <span class="ruby-identifier">address</span>=<span class="ruby-keyword">nil</span>)
<span class="ruby-ivar">@port</span> = <span class="ruby-identifier">service_port</span> <span class="ruby-comment"># port server will listen on</span>
<span class="ruby-ivar">@shutdown</span> = <span class="ruby-keyword">false</span> <span class="ruby-comment"># Flag to indicate that server is shutting down.</span>
<span class="ruby-ivar">@acceptor</span> = <span class="ruby-keyword">nil</span> <span class="ruby-comment"># Listening socket for incoming connections.</span>
<span class="ruby-ivar">@connector</span> = <span class="ruby-keyword">nil</span> <span class="ruby-comment"># Connecting socket for outgoing connections.</span>
<span class="ruby-ivar">@registry</span> = [] <span class="ruby-comment"># list of sessions</span>
<span class="ruby-ivar">@address</span> = <span class="ruby-identifier">address</span> <span class="ruby-comment"># Address for Connector.</span>
<span class="ruby-ivar">@service_type</span> = <span class="ruby-identifier">service_type</span>
<span class="ruby-ivar">@service_io</span> = <span class="ruby-identifier">service_io</span>
<span class="ruby-ivar">@service_negotiation</span> = <span class="ruby-identifier">service_negotiation</span>
<span class="ruby-ivar">@service_filters</span> = <span class="ruby-identifier">service_filters</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier">inspect</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- new-source -->
</div>
</div><!-- new-method -->
</section><!-- public-class-method-details -->
<section id="public-instance-5Buntitled-5D-method-details" class="method-section section">
<h3 class="section-header">Public Instance Methods</h3>
<div id="method-i-poll" class="method-detail ">
<div class="method-heading">
<span class="method-name">poll</span><span
class="method-args">(tm_out)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>poll starts the <a href="Reactor.html">Reactor</a> running to process
incoming connection, input and output requests. It also executes commands
from input requests.</p>
<dl class="rdoc-list label-list"><dt>+tm_out*
<dd>
<p>time to poll in seconds</p>
</dd></dl>
<div class="method-source-code" id="poll-source">
<pre><span class="ruby-comment"># File lib/network/reactor.rb, line 107</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">poll</span>(<span class="ruby-identifier">tm_out</span>)
<span class="ruby-comment"># Reset our socket interest set</span>
<span class="ruby-identifier">infds</span> = [];<span class="ruby-identifier">outfds</span> = [];<span class="ruby-identifier">oobfds</span> = []
<span class="ruby-ivar">@registry</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">s</span><span class="ruby-operator">|</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">is_readable?</span>
<span class="ruby-identifier">infds</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">sock</span>
<span class="ruby-identifier">oobfds</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">sock</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">is_writable?</span>
<span class="ruby-identifier">outfds</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">sock</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>
<span class="ruby-comment"># Poll our socket interest set</span>
<span class="ruby-identifier">infds</span>,<span class="ruby-identifier">outfds</span>,<span class="ruby-identifier">oobfds</span> = <span class="ruby-identifier">select</span>(<span class="ruby-identifier">infds</span>, <span class="ruby-identifier">outfds</span>, <span class="ruby-identifier">oobfds</span>, <span class="ruby-identifier">tm_out</span>)
<span class="ruby-comment"># Dispatch events to handlers</span>
<span class="ruby-ivar">@registry</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">s</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">s</span>.<span class="ruby-identifier">handle_output</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">outfds</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">outfds</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">s</span>.<span class="ruby-identifier">sock</span>)
<span class="ruby-identifier">s</span>.<span class="ruby-identifier">handle_oob</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">oobfds</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">oobfds</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">s</span>.<span class="ruby-identifier">sock</span>)
<span class="ruby-identifier">s</span>.<span class="ruby-identifier">handle_input</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">infds</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">infds</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">s</span>.<span class="ruby-identifier">sock</span>)
<span class="ruby-identifier">s</span>.<span class="ruby-identifier">handle_close</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">closing</span>
<span class="ruby-comment"># special handling for Telnet initialization</span>
<span class="ruby-keyword">if</span> <span class="ruby-ivar">@service_filters</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-value">:telnetfilter</span>) <span class="ruby-operator">&&</span>
<span class="ruby-identifier">s</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-value">:initdone</span>) <span class="ruby-operator">&&</span> <span class="ruby-operator">!</span><span class="ruby-identifier">s</span>.<span class="ruby-identifier">initdone</span>
<span class="ruby-identifier">s</span>.<span class="ruby-identifier">pstack</span>.<span class="ruby-identifier">set</span>(<span class="ruby-value">:init_subneg</span>, <span class="ruby-keyword">true</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">rescue</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">error</span> <span class="ruby-node">"Reactor#poll"</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">error</span> <span class="ruby-identifier">$!</span>
<span class="ruby-identifier">raise</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- poll-source -->
</div>
</div><!-- poll-method -->
<div id="method-i-register" class="method-detail ">
<div class="method-heading">
<span class="method-name">register</span><span
class="method-args">(session)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>register adds a session to the registry</p>
<dl class="rdoc-list label-list"><dt><code>session</code>
<dd></dd></dl>
<div class="method-source-code" id="register-source">
<pre><span class="ruby-comment"># File lib/network/reactor.rb, line 143</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">register</span>(<span class="ruby-identifier">session</span>)
<span class="ruby-ivar">@registry</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">session</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- register-source -->
</div>
</div><!-- register-method -->
<div id="method-i-start" class="method-detail ">
<div class="method-heading">
<span class="method-name">start</span><span
class="method-args">(engine)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Start initializes the reactor and gets it ready to accept incoming
connections.</p>
<dl class="rdoc-list label-list"><dt><code>engine</code>
<dd>
<p>The client engine that will be observing the acceptor.</p>
</dd><dt><code>return</code>'
<dd>
<p>true if server boots correctly, false if an error occurs.</p>
</dd></dl>
<div class="method-source-code" id="start-source">
<pre><span class="ruby-comment"># File lib/network/reactor.rb, line 75</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">start</span>(<span class="ruby-identifier">engine</span>)
<span class="ruby-comment"># Create an acceptor to listen for this server.</span>
<span class="ruby-keyword">if</span> <span class="ruby-ivar">@service_type</span> <span class="ruby-operator">==</span> <span class="ruby-value">:client</span>
<span class="ruby-ivar">@connector</span> = <span class="ruby-constant">Connector</span>.<span class="ruby-identifier">new</span>(<span class="ruby-keyword">self</span>, <span class="ruby-ivar">@address</span>)
<span class="ruby-ivar">@connector</span>.<span class="ruby-identifier">subscribe</span>(<span class="ruby-identifier">engine</span>)
<span class="ruby-keyword">return</span> <span class="ruby-keyword">false</span> <span class="ruby-keyword">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@connector</span>.<span class="ruby-identifier">init</span>
<span class="ruby-keyword">else</span>
<span class="ruby-ivar">@acceptor</span> = <span class="ruby-constant">Acceptor</span>.<span class="ruby-identifier">new</span>(<span class="ruby-keyword">self</span>)
<span class="ruby-keyword">return</span> <span class="ruby-keyword">false</span> <span class="ruby-keyword">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@acceptor</span>.<span class="ruby-identifier">init</span>
<span class="ruby-ivar">@acceptor</span>.<span class="ruby-identifier">subscribe</span>(<span class="ruby-identifier">engine</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">true</span>
<span class="ruby-keyword">rescue</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">error</span> <span class="ruby-node">"Reactor#start"</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">error</span> <span class="ruby-identifier">$!</span>
<span class="ruby-keyword">false</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- start-source -->
</div>
</div><!-- start-method -->
<div id="method-i-stop" class="method-detail ">
<div class="method-heading">
<span class="method-name">stop</span><span
class="method-args">()</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>stop requests each of the connections to disconnect in the server’s user
list, deletes the connections, and erases them from the user list. It then
closes its own listening port.</p>
<div class="method-source-code" id="stop-source">
<pre><span class="ruby-comment"># File lib/network/reactor.rb, line 96</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">stop</span>
<span class="ruby-ivar">@registry</span>.<span class="ruby-identifier">each</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">s</span><span class="ruby-operator">|</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">closing</span> = <span class="ruby-keyword">true</span>}
<span class="ruby-ivar">@acceptor</span>.<span class="ruby-identifier">unsubscribe_all</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@acceptor</span>
<span class="ruby-ivar">@connector</span>.<span class="ruby-identifier">unsubscribe_all</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@connector</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">info</span> <span class="ruby-node">"Reactor#shutdown: Reactor shutting down"</span>
<span class="ruby-comment"># log.close</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- stop-source -->
</div>
</div><!-- stop-method -->
<div id="method-i-unregister" class="method-detail ">
<div class="method-heading">
<span class="method-name">unregister</span><span
class="method-args">(session)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>unregister removes a session from the registry</p>
<dl class="rdoc-list label-list"><dt><code>session</code>
<dd></dd></dl>
<div class="method-source-code" id="unregister-source">
<pre><span class="ruby-comment"># File lib/network/reactor.rb, line 149</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">unregister</span>(<span class="ruby-identifier">session</span>)
<span class="ruby-ivar">@registry</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-identifier">session</span>)
<span class="ruby-keyword">end</span></pre>
</div><!-- unregister-source -->
</div>
</div><!-- unregister-method -->
</section><!-- public-instance-method-details -->
</section><!-- 5Buntitled-5D -->
</div><!-- documentation -->
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