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|
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Class: Concurrent::ErlangActor::Environment
— Concurrent Ruby
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<div id="content"><h1>Class: Concurrent::ErlangActor::Environment
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<li>Object</li>
<li class="next"><span class='object_link'><a href="../Synchronization/Object.html" title="Concurrent::Synchronization::Object (class)">Synchronization::Object</a></span></li>
<li class="next">Concurrent::ErlangActor::Environment</li>
</ul>
<a href="#" class="inheritanceTree">show all</a>
</dd>
</dl>
<dl>
<dt>Defined in:</dt>
<dd>lib-edge/concurrent/edge/erlang_actor.rb</dd>
</dl>
</div>
<h2>Overview</h2><div class="docstring">
<div class="discussion">
<p>A class providing environment and methods for actor bodies to run in.</p>
</div>
</div>
<div class="tags">
</div>
<h2>
Instance Method Summary
<small><a href="#" class="summary_toggle">collapse</a></small>
</h2>
<ul class="summary">
<li class="public ">
<span class="summary_signature">
<a href="#default_executor-instance_method" title="#default_executor (instance method)">#<strong>default_executor</strong> ⇒ ExecutorService </a>
</span>
<span class="summary_desc"><div class='inline'><p>A default executor which is picked by spawn call.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#demonitor-instance_method" title="#demonitor (instance method)">#<strong>demonitor</strong>(reference, *options) ⇒ true, false </a>
</span>
<span class="summary_desc"><div class='inline'><p>If MonitorRef is a reference which the calling actor obtained by calling <span class='object_link'><a href="#monitor-instance_method" title="Concurrent::ErlangActor::Environment#monitor (method)">#monitor</a></span>, this monitoring is turned off.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#link-instance_method" title="#link (instance method)">#<strong>link</strong>(pid) ⇒ true </a>
</span>
<span class="summary_desc"><div class='inline'><p>Creates a link between the calling actor and another actor, if there is not such a link already.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#monitor-instance_method" title="#monitor (instance method)">#<strong>monitor</strong>(pid) ⇒ Reference </a>
</span>
<span class="summary_desc"><div class='inline'><p>The calling actor starts monitoring actor with given pid.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#name-instance_method" title="#name (instance method)">#<strong>name</strong> ⇒ #to_s </a>
</span>
<span class="summary_desc"><div class='inline'><p>The name od the actor if provided to spawn method.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#on-instance_method" title="#on (instance method)">#<strong>on</strong>(matcher, value = nil, &block) ⇒ undocumented </a>
</span>
<span class="summary_desc"><div class='inline'><p>Helper for constructing a <span class='object_link'><a href="#receive-instance_method" title="Concurrent::ErlangActor::Environment#receive (method)">#receive</a></span> rules.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#pid-instance_method" title="#pid (instance method)">#<strong>pid</strong> ⇒ Pid </a>
</span>
<span class="summary_desc"><div class='inline'><p>The pid of this actor.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#receive-instance_method" title="#receive (instance method)">#<strong>receive</strong>(*rules, timeout: nil, timeout_value: nil, **options) {|message| ... } ⇒ Object, nothing </a>
</span>
<span class="summary_desc"><div class='inline'><p>Receive a message.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#reply-instance_method" title="#reply (instance method)">#<strong>reply</strong>(value) ⇒ true, false </a>
</span>
<span class="summary_desc"><div class='inline'><p>Shortcut for fulfilling the reply, same as <code>reply_resolution true, value, nil</code>.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#reply_resolution-instance_method" title="#reply_resolution (instance method)">#<strong>reply_resolution</strong>(fulfilled = true, value = nil, reason = nil) ⇒ true, false </a>
</span>
<span class="summary_desc"><div class='inline'><p>Reply to the sender of the message currently being processed if the actor was asked instead of told.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#spawn-instance_method" title="#spawn (instance method)">#<strong>spawn</strong>(*args, type: @Actor.class, channel: Promises::Channel.new, environment: Environment, name: nil, executor: default_executor, link: false, monitor: false) {|*args| ... } ⇒ Pid, ::Array(Pid, Reference) </a>
</span>
<span class="summary_desc"><div class='inline'><p>Creates an actor.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#terminate-instance_method" title="#terminate (instance method)">#<strong>terminate</strong>(pid = nil, reason, value: nil) ⇒ nothing </a>
</span>
<span class="summary_desc"><div class='inline'><p>If pid <strong>is not</strong> provided stops the execution of the calling actor with the exit reason.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#terminated-instance_method" title="#terminated (instance method)">#<strong>terminated</strong> ⇒ Promises::Future </a>
</span>
<span class="summary_desc"><div class='inline'><p>A future which is resolved with the final result of the actor that is either the reason for termination or a value if terminated normally.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#trap-instance_method" title="#trap (instance method)">#<strong>trap</strong>(value = true) ⇒ true, false </a>
</span>
<span class="summary_desc"><div class='inline'><p>When trap is set to true, exit signals arriving to a actor are converted to <span class='object_link'><a href="Terminated.html" title="Concurrent::ErlangActor::Terminated (class)">Terminated</a></span> messages, which can be received as ordinary messages.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#traps%3F-instance_method" title="#traps? (instance method)">#<strong>traps?</strong> ⇒ true, false </a>
</span>
<span class="summary_desc"><div class='inline'><p>Does this actor trap exit messages?.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#unlink-instance_method" title="#unlink (instance method)">#<strong>unlink</strong>(pid) ⇒ true </a>
</span>
<span class="summary_desc"><div class='inline'><p>Removes the link, if there is one, between the calling actor and the actor referred to by pid.</p>
</div></span>
</li>
</ul>
<div id="instance_method_details" class="method_details_list">
<h2>Instance Method Details</h2>
<div class="method_details first">
<h3 class="signature first" id="default_executor-instance_method">
#<strong>default_executor</strong> ⇒ <tt><span class='object_link'>ExecutorService</span></tt>
</h3><div class="docstring">
<div class="discussion">
<p>Returns a default executor which is picked by spawn call</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'>ExecutorService</span></tt>)</span>
—
<div class='inline'><p>a default executor which is picked by spawn call</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 461</span>
<span class='kw'>def</span> <span class='id identifier rubyid_default_executor'>default_executor</span>
<span class='ivar'>@DefaultExecutor</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="demonitor-instance_method">
#<strong>demonitor</strong>(reference, *options) ⇒ <tt>true</tt>, <tt>false</tt>
</h3><div class="docstring">
<div class="discussion">
<p>If MonitorRef is a reference which the calling actor obtained by calling <span class='object_link'><a href="#monitor-instance_method" title="Concurrent::ErlangActor::Environment#monitor (method)">#monitor</a></span>,
this monitoring is turned off.
If the monitoring is already turned off, nothing happens.</p>
<p>Once demonitor has returned it is guaranteed that no <span class='object_link'>DownSignal</span> message
due to the monitor will be placed in the caller's message queue in the future.
A <span class='object_link'>DownSignal</span> message might have been placed in the caller's message queue prior to the call, though.
Therefore, in most cases, it is advisable to remove such a 'DOWN' message from the message queue
after monitoring has been stopped.
<code>demonitor(reference, :flush)</code> can be used if this cleanup is wanted.</p>
<p>The behavior of this method can be viewed as two combined operations:
asynchronously send a "demonitor signal" to the monitored actor and
ignore any future results of the monitor.</p>
<p>Failure: It is an error if reference refers to a monitoring started by another actor.
In that case it may raise an ArgumentError or go unnoticed.</p>
<p>Options:</p>
<ul>
<li><p><code>:flush</code> - Remove (one) <span class='object_link'>DownSignal</span> message,
if there is one, from the caller's message queue after monitoring has been stopped.
Calling <code>demonitor(pid, :flush)</code> is equivalent to the following, but more efficient:</p>
<pre class="code ruby"><code class="ruby"><span class='id identifier rubyid_demonitor'>demonitor</span><span class='lparen'>(</span><span class='id identifier rubyid_pid'>pid</span><span class='rparen'>)</span>
<span class='id identifier rubyid_receive'>receive</span> <span class='id identifier rubyid_on'>on</span><span class='lparen'>(</span><span class='const'><span class='object_link'><a href="EnvironmentConstants/And.html" title="Concurrent::ErlangActor::EnvironmentConstants::And (class)">And</a></span></span><span class='lbracket'>[</span><span class='const'>DownSignal</span><span class='comma'>,</span> <span class='tlambda'>-></span> <span class='id identifier rubyid_d'>d</span> <span class='tlambeg'>{</span> <span class='id identifier rubyid_d'>d</span><span class='period'>.</span><span class='id identifier rubyid_reference'>reference</span> <span class='op'>==</span> <span class='id identifier rubyid_reference'>reference</span><span class='rbrace'>}</span><span class='rbracket'>]</span><span class='comma'>,</span> <span class='kw'>true</span><span class='rparen'>)</span><span class='comma'>,</span> <span class='label'>timeout:</span> <span class='int'>0</span><span class='comma'>,</span> <span class='label'>timeout_value:</span> <span class='kw'>true</span>
</code></pre></li>
<li><p><code>info</code>
The returned value is one of the following:</p>
<ul>
<li> <code>true</code> - The monitor was found and removed.
In this case no <span class='object_link'>DownSignal</span> message due to this monitor have been
nor will be placed in the message queue of the caller.</li>
<li> <code>false</code> - The monitor was not found and could not be removed.
This probably because someone already has placed a <span class='object_link'>DownSignal</span> message
corresponding to this monitor in the caller's message queue.</li>
</ul>
<p>If the info option is combined with the flush option,
<code>false</code> will be returned if a flush was needed; otherwise, <code>true</code>.</p></li>
</ul>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>reference</span>
<span class='type'>(<tt><span class='object_link'><a href="Reference.html" title="Concurrent::ErlangActor::Reference (class)">Reference</a></span></tt>)</span>
</li>
<li>
<span class='name'>options</span>
<span class='type'>(<tt>:flush</tt>, <tt>:info</tt>)</span>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 328</span>
<span class='kw'>def</span> <span class='id identifier rubyid_demonitor'>demonitor</span><span class='lparen'>(</span><span class='id identifier rubyid_reference'>reference</span><span class='comma'>,</span> <span class='op'>*</span><span class='id identifier rubyid_options'>options</span><span class='rparen'>)</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_demonitor'>demonitor</span><span class='lparen'>(</span><span class='id identifier rubyid_reference'>reference</span><span class='comma'>,</span> <span class='op'>*</span><span class='id identifier rubyid_options'>options</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="link-instance_method">
#<strong>link</strong>(pid) ⇒ <tt>true</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Creates a link between the calling actor and another actor,
if there is not such a link already.
If a actor attempts to create a link to itself, nothing is done. Returns true.</p>
<p>If pid does not exist,
the behavior of the method depends on
if the calling actor is trapping exits or not (see <span class='object_link'><a href="#trap-instance_method" title="Concurrent::ErlangActor::Environment#trap (method)">#trap</a></span>):</p>
<ul>
<li>If the calling actor is not trapping exits link raises with <span class='object_link'><a href="NoActor.html" title="Concurrent::ErlangActor::NoActor (class)">NoActor</a></span>.</li>
<li>Otherwise, if the calling actor is trapping exits, link returns true,
but an exit signal with reason noproc is sent to the calling actor.</li>
</ul>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>true</tt>)</span>
</li>
</ul>
<p class="tag_title">Raises:</p>
<ul class="raise">
<li>
<span class='type'>(<tt><span class='object_link'><a href="NoActor.html" title="Concurrent::ErlangActor::NoActor (class)">NoActor</a></span></tt>)</span>
</li>
</ul>
<p class="tag_title">See Also:</p>
<ul class="see">
<li><a href="http://www1.erlang.org/doc/man/erlang.html#link-1" target="_parent" title="http://www1.erlang.org/doc/man/erlang.html#link-1">http://www1.erlang.org/doc/man/erlang.html#link-1</a></li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 232</span>
<span class='kw'>def</span> <span class='id identifier rubyid_link'>link</span><span class='lparen'>(</span><span class='id identifier rubyid_pid'>pid</span><span class='rparen'>)</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_link'>link</span><span class='lparen'>(</span><span class='id identifier rubyid_pid'>pid</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="monitor-instance_method">
#<strong>monitor</strong>(pid) ⇒ <tt><span class='object_link'><a href="Reference.html" title="Concurrent::ErlangActor::Reference (class)">Reference</a></span></tt>
</h3><div class="docstring">
<div class="discussion">
<p>The calling actor starts monitoring actor with given pid.</p>
<p>A <span class='object_link'>DownSignal</span> message will be sent to the monitoring actor
if the actor with given pid dies,
or if the actor with given pid does not exist.</p>
<p>The monitoring is turned off either
when the <span class='object_link'>DownSignal</span> message is sent, or when <span class='object_link'><a href="#demonitor-instance_method" title="Concurrent::ErlangActor::Environment#demonitor (method)">#demonitor</a></span> is called.</p>
<p>Making several calls to monitor for the same pid is not an error;
it results in as many, completely independent, monitorings.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="Reference.html" title="Concurrent::ErlangActor::Reference (class)">Reference</a></span></tt>)</span>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 281</span>
<span class='kw'>def</span> <span class='id identifier rubyid_monitor'>monitor</span><span class='lparen'>(</span><span class='id identifier rubyid_pid'>pid</span><span class='rparen'>)</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_monitor'>monitor</span><span class='lparen'>(</span><span class='id identifier rubyid_pid'>pid</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="name-instance_method">
#<strong>name</strong> ⇒ <tt>#to_s</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Returns the name od the actor if provided to spawn method</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>#to_s</tt>)</span>
—
<div class='inline'><p>the name od the actor if provided to spawn method</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 150</span>
<span class='kw'>def</span> <span class='id identifier rubyid_name'>name</span>
<span class='id identifier rubyid_pid'>pid</span><span class='period'>.</span><span class='id identifier rubyid_name'>name</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="on-instance_method">
#<strong>on</strong>(matcher, value = nil, &block) ⇒ <tt>undocumented</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Helper for constructing a <span class='object_link'><a href="#receive-instance_method" title="Concurrent::ErlangActor::Environment#receive (method)">#receive</a></span> rules</p>
</div>
</div>
<div class="tags">
<div class="examples">
<p class="tag_title">Examples:</p>
<pre class="example code"><code><span class='id identifier rubyid_receive'>receive</span> <span class='id identifier rubyid_on'>on</span><span class='lparen'>(</span><span class='const'>Numeric</span><span class='rparen'>)</span> <span class='lbrace'>{</span> <span class='op'>|</span><span class='id identifier rubyid_v'>v</span><span class='op'>|</span> <span class='id identifier rubyid_v'>v</span><span class='period'>.</span><span class='id identifier rubyid_succ'>succ</span> <span class='rbrace'>}</span><span class='comma'>,</span>
<span class='id identifier rubyid_on'>on</span><span class='lparen'>(</span><span class='const'><span class='object_link'><a href="EnvironmentConstants.html#ANY-constant" title="Concurrent::ErlangActor::EnvironmentConstants::ANY (constant)">ANY</a></span></span><span class='rparen'>)</span> <span class='lbrace'>{</span> <span class='id identifier rubyid_terminate'>terminate</span> <span class='symbol'>:bad_message</span> <span class='rbrace'>}</span></code></pre>
</div>
<p class="tag_title">See Also:</p>
<ul class="see">
<li><span class='object_link'><a href="#receive-instance_method" title="Concurrent::ErlangActor::Environment#receive (method)">#receive</a></span></li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 181</span>
<span class='kw'>def</span> <span class='id identifier rubyid_on'>on</span><span class='lparen'>(</span><span class='id identifier rubyid_matcher'>matcher</span><span class='comma'>,</span> <span class='id identifier rubyid_value'>value</span> <span class='op'>=</span> <span class='kw'>nil</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_on'>on</span> <span class='id identifier rubyid_matcher'>matcher</span><span class='comma'>,</span> <span class='id identifier rubyid_value'>value</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="pid-instance_method">
#<strong>pid</strong> ⇒ <tt><span class='object_link'><a href="Pid.html" title="Concurrent::ErlangActor::Pid (class)">Pid</a></span></tt>
</h3><div class="docstring">
<div class="discussion">
<p>Returns the pid of this actor</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="Pid.html" title="Concurrent::ErlangActor::Pid (class)">Pid</a></span></tt>)</span>
—
<div class='inline'><p>the pid of this actor</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 145</span>
<span class='kw'>def</span> <span class='id identifier rubyid_pid'>pid</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_pid'>pid</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="receive-instance_method">
#<strong>receive</strong>(*rules, timeout: nil, timeout_value: nil, **options) {|message| ... } ⇒ <tt>Object</tt>, <tt>nothing</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Receive a message.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>rules</span>
<span class='type'>(<tt>::Array()</tt>, <tt>::Array(#===)</tt>, <tt>::Array<::Array(#===, Proc)></tt>)</span>
—
<div class='inline'><ul>
<li> No rule - <code>receive</code>, <code>receive {|m| m.to_s}</code></li>
<li> or single rule which can be combined with the supplied block -
<code>receive(Numeric)</code>, <code>receive(Numeric) {|v| v.succ}</code></li>
<li> or array of matcher-proc pairs -
<code>receive on(Numeric) { |v| v*2 }, on(Symbol) { |c| do_command c }</code></li>
</ul>
</div>
</li>
<li>
<span class='name'>timeout</span>
<span class='type'>(<tt>Numeric</tt>)</span>
—
<div class='inline'><p>how long it should wait for the message</p>
</div>
</li>
<li>
<span class='name'>timeout_value</span>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>if rule <code>on(TIMEOUT) { do_something }</code> is not specified
then timeout_value is returned.</p>
</div>
</li>
<li>
<span class='name'>options</span>
<span class='type'>(<tt><span class='object_link'><a href="../Hash.html" title="Concurrent::Hash (class)">Hash</a></span></tt>)</span>
—
<div class='inline'><p>other options specific by type of the actor</p>
</div>
</li>
</ul>
<p class="tag_title">Options Hash (<tt>**options</tt>):</p>
<ul class="option">
<li>
<span class="name">:keep</span>
<span class="type">(<tt>true</tt>, <tt>false</tt>)</span>
<span class="default">
</span>
— <div class='inline'><p>Keep the rules and repeatedly call the associated blocks,
until receive is called again.</p>
</div>
</li>
</ul>
<p class="tag_title">Yields:</p>
<ul class="yield">
<li>
<span class='type'>(<tt>message</tt>)</span>
—
<div class='inline'><p>block
to process the message
if single matcher is supplied</p>
</div>
</li>
</ul>
<p class="tag_title">Yield Parameters:</p>
<ul class="yieldparam">
<li>
<span class='name'>message</span>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>the received message</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Object</tt>, <tt>nothing</tt>)</span>
—
<div class='inline'><p>depends on type of the actor.
On thread it blocks until message is available
then it returns the message (or a result of a called block).
On pool it stops executing and continues with a given block
when message becomes available.</p>
</div>
</li>
</ul>
<p class="tag_title">See Also:</p>
<ul class="see">
<li><span class='object_link'><a href="../ErlangActor.html" title="Concurrent::ErlangActor (module)">Receiving chapter in the ErlangActor examples</a></span></li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 214</span>
<span class='kw'>def</span> <span class='id identifier rubyid_receive'>receive</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_rules'>rules</span><span class='comma'>,</span> <span class='label'>timeout:</span> <span class='kw'>nil</span><span class='comma'>,</span> <span class='label'>timeout_value:</span> <span class='kw'>nil</span><span class='comma'>,</span> <span class='op'>**</span><span class='id identifier rubyid_options'>options</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_receive'>receive</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_rules'>rules</span><span class='comma'>,</span> <span class='label'>timeout:</span> <span class='id identifier rubyid_timeout'>timeout</span><span class='comma'>,</span> <span class='label'>timeout_value:</span> <span class='id identifier rubyid_timeout_value'>timeout_value</span><span class='comma'>,</span> <span class='op'>**</span><span class='id identifier rubyid_options'>options</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="reply-instance_method">
#<strong>reply</strong>(value) ⇒ <tt>true</tt>, <tt>false</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Shortcut for fulfilling the reply, same as <code>reply_resolution true, value, nil</code>.</p>
</div>
</div>
<div class="tags">
<div class="examples">
<p class="tag_title">Examples:</p>
<pre class="example code"><code><span class='id identifier rubyid_actor'>actor</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="../../Concurrent.html" title="Concurrent (module)">Concurrent</a></span></span><span class='op'>::</span><span class='const'><span class='object_link'><a href="../ErlangActor.html" title="Concurrent::ErlangActor (module)">ErlangActor</a></span></span><span class='period'>.</span><span class='id identifier rubyid_spawn'><span class='object_link'><a href="FunctionShortcuts.html#spawn-instance_method" title="Concurrent::ErlangActor::FunctionShortcuts#spawn (method)">spawn</a></span></span><span class='lparen'>(</span><span class='symbol'>:on_thread</span><span class='rparen'>)</span> <span class='lbrace'>{</span> <span class='id identifier rubyid_reply'>reply</span> <span class='id identifier rubyid_receive'>receive</span> <span class='op'>*</span> <span class='int'>2</span> <span class='rbrace'>}</span>
<span class='id identifier rubyid_actor'>actor</span><span class='period'>.</span><span class='id identifier rubyid_ask'>ask</span> <span class='int'>2</span> <span class='comment'>#=> 4</span></code></pre>
</div>
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>value</span>
<span class='type'>(<tt>Object</tt>)</span>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
—
<div class='inline'><p>did the sender ask, and was it resolved</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 401</span>
<span class='kw'>def</span> <span class='id identifier rubyid_reply'>reply</span><span class='lparen'>(</span><span class='id identifier rubyid_value'>value</span><span class='rparen'>)</span>
<span class='comment'># TODO (pitr-ch 08-Feb-2019): consider adding reply? which returns true,false if success, reply method will always return value
</span> <span class='id identifier rubyid_reply_resolution'>reply_resolution</span> <span class='kw'>true</span><span class='comma'>,</span> <span class='id identifier rubyid_value'>value</span><span class='comma'>,</span> <span class='kw'>nil</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="reply_resolution-instance_method">
#<strong>reply_resolution</strong>(fulfilled = true, value = nil, reason = nil) ⇒ <tt>true</tt>, <tt>false</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Reply to the sender of the message currently being processed
if the actor was asked instead of told.
The reply is stored in a <span class='object_link'><a href="../Promises/ResolvableFuture.html" title="Concurrent::Promises::ResolvableFuture (class)">Promises::ResolvableFuture</a></span>
so the arguments are same as for <span class='object_link'><a href="../Promises/ResolvableFuture.html#resolve-instance_method" title="Concurrent::Promises::ResolvableFuture#resolve (method)">Promises::ResolvableFuture#resolve</a></span> method.</p>
<p>The reply may timeout, then this will fail with false.</p>
</div>
</div>
<div class="tags">
<div class="examples">
<p class="tag_title">Examples:</p>
<pre class="example code"><code><span class='id identifier rubyid_actor'>actor</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="../../Concurrent.html" title="Concurrent (module)">Concurrent</a></span></span><span class='op'>::</span><span class='const'><span class='object_link'><a href="../ErlangActor.html" title="Concurrent::ErlangActor (module)">ErlangActor</a></span></span><span class='period'>.</span><span class='id identifier rubyid_spawn'><span class='object_link'><a href="FunctionShortcuts.html#spawn-instance_method" title="Concurrent::ErlangActor::FunctionShortcuts#spawn (method)">spawn</a></span></span><span class='lparen'>(</span><span class='symbol'>:on_thread</span><span class='rparen'>)</span> <span class='lbrace'>{</span> <span class='id identifier rubyid_reply_resolution'>reply_resolution</span> <span class='kw'>true</span><span class='comma'>,</span> <span class='id identifier rubyid_receive'>receive</span> <span class='op'>*</span> <span class='int'>2</span><span class='comma'>,</span> <span class='kw'>nil</span> <span class='rbrace'>}</span>
<span class='id identifier rubyid_actor'>actor</span><span class='period'>.</span><span class='id identifier rubyid_ask'>ask</span> <span class='int'>2</span> <span class='comment'>#=> 4</span></code></pre>
</div>
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>fulfilled</span>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
<em class="default">(defaults to: <tt>true</tt>)</em>
</li>
<li>
<span class='name'>value</span>
<span class='type'>(<tt>Object</tt>)</span>
<em class="default">(defaults to: <tt>nil</tt>)</em>
</li>
<li>
<span class='name'>reason</span>
<span class='type'>(<tt>Object</tt>)</span>
<em class="default">(defaults to: <tt>nil</tt>)</em>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
—
<div class='inline'><p>did the sender ask, and was it resolved before it timed out?</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 422</span>
<span class='kw'>def</span> <span class='id identifier rubyid_reply_resolution'>reply_resolution</span><span class='lparen'>(</span><span class='id identifier rubyid_fulfilled'>fulfilled</span> <span class='op'>=</span> <span class='kw'>true</span><span class='comma'>,</span> <span class='id identifier rubyid_value'>value</span> <span class='op'>=</span> <span class='kw'>nil</span><span class='comma'>,</span> <span class='id identifier rubyid_reason'>reason</span> <span class='op'>=</span> <span class='kw'>nil</span><span class='rparen'>)</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_reply_resolution'>reply_resolution</span><span class='lparen'>(</span><span class='id identifier rubyid_fulfilled'>fulfilled</span><span class='comma'>,</span> <span class='id identifier rubyid_value'>value</span><span class='comma'>,</span> <span class='id identifier rubyid_reason'>reason</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="spawn-instance_method">
#<strong>spawn</strong>(*args, type: @Actor.class, channel: Promises::Channel.new, environment: Environment, name: nil, executor: default_executor, link: false, monitor: false) {|*args| ... } ⇒ <tt><span class='object_link'><a href="Pid.html" title="Concurrent::ErlangActor::Pid (class)">Pid</a></span></tt>, <tt>::Array(<span class='object_link'><a href="Pid.html" title="Concurrent::ErlangActor::Pid (class)">Pid</a></span>, <span class='object_link'><a href="Reference.html" title="Concurrent::ErlangActor::Reference (class)">Reference</a></span>)</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Creates an actor.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>args</span>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>arguments for the actor body</p>
</div>
</li>
<li>
<span class='name'>type</span>
<span class='type'>(<tt>:on_thread</tt>, <tt>:on_pool</tt>)</span>
—
<div class='inline'><p>of the actor to be created.</p>
</div>
</li>
<li>
<span class='name'>channel</span>
<span class='type'>(<tt><span class='object_link'><a href="../Channel.html" title="Concurrent::Channel (class)">Channel</a></span></tt>)</span>
—
<div class='inline'><p>The mailbox of the actor, by default it has unlimited capacity.
Crating the actor with a bounded queue is useful to create backpressure.
The channel can be shared with other abstractions
but actor has to be the only consumer
otherwise internal signals could be lost.</p>
</div>
</li>
<li>
<span class='name'>environment</span>
<span class='type'>(<tt><span class='object_link'><a href="" title="Concurrent::ErlangActor::Environment (class)">Environment</a></span></tt>, <tt>Module</tt>)</span>
—
<div class='inline'><p>A class which is used to run the body of the actor in.
It can either be a child of <span class='object_link'><a href="" title="Concurrent::ErlangActor::Environment (class)">Concurrent::ErlangActor::Environment</a></span> or a module.
Module is extended to a new instance of environment,
therefore if there is many actors with this module
it is better to create a class and use it instead.</p>
</div>
</li>
<li>
<span class='name'>name</span>
<span class='type'>(<tt>#to_s</tt>)</span>
—
<div class='inline'><p>of the actor.
Available by <span class='object_link'><a href="Pid.html#name-instance_method" title="Concurrent::ErlangActor::Pid#name (method)">Pid#name</a></span> or <span class='object_link'><a href="#name-instance_method" title="Concurrent::ErlangActor::Environment#name (method)">#name</a></span> and part of <span class='object_link'><a href="Pid.html#to_s-instance_method" title="Concurrent::ErlangActor::Pid#to_s (method)">Pid#to_s</a></span>.</p>
</div>
</li>
<li>
<span class='name'>link</span>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
—
<div class='inline'><p>the created actor is atomically created and linked with the calling actor</p>
</div>
</li>
<li>
<span class='name'>monitor</span>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
—
<div class='inline'><p>the created actor is atomically created and monitored by the calling actor</p>
</div>
</li>
<li>
<span class='name'>executor</span>
<span class='type'>(<tt><span class='object_link'>ExecutorService</span></tt>)</span>
—
<div class='inline'><p>The executor service to use to execute the actor on.
Applies only to :on_pool actor type.</p>
</div>
</li>
</ul>
<p class="tag_title">Yields:</p>
<ul class="yield">
<li>
<span class='type'>(<tt>*args</tt>)</span>
—
<div class='inline'><p>the body of the actor.
When actor is spawned this block is evaluated
until it terminates.
The on-thread actor requires a block.
The on-poll actor has a default <code>-> { start }</code>,
therefore if not block is given it executes a #start method
which needs to be provided with environment.</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="Pid.html" title="Concurrent::ErlangActor::Pid (class)">Pid</a></span></tt>, <tt>::Array(<span class='object_link'><a href="Pid.html" title="Concurrent::ErlangActor::Pid (class)">Pid</a></span>, <span class='object_link'><a href="Reference.html" title="Concurrent::ErlangActor::Reference (class)">Reference</a></span>)</tt>)</span>
—
<div class='inline'><p>a pid or a pid-reference pair when monitor is true</p>
</div>
</li>
</ul>
<p class="tag_title">See Also:</p>
<ul class="see">
<li><a href="http://www1.erlang.org/doc/man/erlang.html#spawn-1" target="_parent" title="http://www1.erlang.org/doc/man/erlang.html#spawn-1">http://www1.erlang.org/doc/man/erlang.html#spawn-1</a></li>
<li><a href="http://www1.erlang.org/doc/man/erlang.html#spawn_link-1" target="_parent" title="http://www1.erlang.org/doc/man/erlang.html#spawn_link-1">http://www1.erlang.org/doc/man/erlang.html#spawn_link-1</a></li>
<li><a href="http://www1.erlang.org/doc/man/erlang.html#spawn_monitor-1" target="_parent" title="http://www1.erlang.org/doc/man/erlang.html#spawn_monitor-1">http://www1.erlang.org/doc/man/erlang.html#spawn_monitor-1</a></li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 374</span>
<span class='kw'>def</span> <span class='id identifier rubyid_spawn'>spawn</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span>
<span class='label'>type:</span> <span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_class'>class</span><span class='comma'>,</span>
<span class='label'>channel:</span> <span class='const'><span class='object_link'><a href="../Promises.html" title="Concurrent::Promises (module)">Promises</a></span></span><span class='op'>::</span><span class='const'><span class='object_link'><a href="../Promises/Channel.html" title="Concurrent::Promises::Channel (class)">Channel</a></span></span><span class='period'>.</span><span class='id identifier rubyid_new'>new</span><span class='comma'>,</span>
<span class='label'>environment:</span> <span class='const'><span class='object_link'><a href="" title="Concurrent::ErlangActor::Environment (class)">Environment</a></span></span><span class='comma'>,</span>
<span class='label'>name:</span> <span class='kw'>nil</span><span class='comma'>,</span>
<span class='label'>executor:</span> <span class='id identifier rubyid_default_executor'>default_executor</span><span class='comma'>,</span>
<span class='label'>link:</span> <span class='kw'>false</span><span class='comma'>,</span>
<span class='label'>monitor:</span> <span class='kw'>false</span><span class='comma'>,</span>
<span class='op'>&</span><span class='id identifier rubyid_body'>body</span><span class='rparen'>)</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_spawn'>spawn</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span>
<span class='label'>type:</span> <span class='id identifier rubyid_type'>type</span><span class='comma'>,</span>
<span class='label'>channel:</span> <span class='id identifier rubyid_channel'>channel</span><span class='comma'>,</span>
<span class='label'>environment:</span> <span class='id identifier rubyid_environment'>environment</span><span class='comma'>,</span>
<span class='label'>name:</span> <span class='id identifier rubyid_name'>name</span><span class='comma'>,</span>
<span class='label'>executor:</span> <span class='id identifier rubyid_executor'>executor</span><span class='comma'>,</span>
<span class='label'>link:</span> <span class='id identifier rubyid_link'>link</span><span class='comma'>,</span>
<span class='label'>monitor:</span> <span class='id identifier rubyid_monitor'>monitor</span><span class='comma'>,</span>
<span class='op'>&</span><span class='id identifier rubyid_body'>body</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="terminate-instance_method">
#<strong>terminate</strong>(pid = nil, reason, value: nil) ⇒ <tt>nothing</tt>
</h3><div class="docstring">
<div class="discussion">
<p>If pid <strong>is not</strong> provided stops the execution of the calling actor
with the exit reason.</p>
<p>If pid <strong>is</strong> provided,
it sends an exit signal with exit reason to the actor identified by pid.</p>
<p>The following behavior apply
if <code>reason</code> is any object except <code>:normal</code> or <code>:kill</code>.
If pid is not trapping exits,
pid itself will exit with exit reason.
If pid is trapping exits,
the exit signal is transformed into a message <span class='object_link'><a href="Terminated.html" title="Concurrent::ErlangActor::Terminated (class)">Terminated</a></span>
and delivered to the message queue of pid.</p>
<p>If reason is the Symbol <code>:normal</code>, pid will not exit.
If it is trapping exits, the exit signal is transformed into a message <span class='object_link'><a href="Terminated.html" title="Concurrent::ErlangActor::Terminated (class)">Terminated</a></span>
and delivered to its message queue.</p>
<p>If reason is the Symbol <code>:kill</code>, that is if <code>exit(pid, :kill)</code> is called,
an untrappable exit signal is sent to pid which will unconditionally exit
with exit reason <code>:killed</code>.</p>
<p>Since evaluating this function causes the process to terminate, it has no return value.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>pid</span>
<span class='type'>(<tt><span class='object_link'><a href="Pid.html" title="Concurrent::ErlangActor::Pid (class)">Pid</a></span></tt>)</span>
<em class="default">(defaults to: <tt>nil</tt>)</em>
</li>
<li>
<span class='name'>reason</span>
<span class='type'>(<tt>Object</tt>, <tt>:normal</tt>, <tt>:kill</tt>)</span>
</li>
<li>
<span class='name'>value</span>
<span class='type'>(<tt>Object</tt>)</span>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>nothing</tt>)</span>
</li>
</ul>
<p class="tag_title">See Also:</p>
<ul class="see">
<li><a href="http://www1.erlang.org/doc/man/erlang.html#error-1" target="_parent" title="http://www1.erlang.org/doc/man/erlang.html#error-1">http://www1.erlang.org/doc/man/erlang.html#error-1</a></li>
<li><a href="http://www1.erlang.org/doc/man/erlang.html#error-2" target="_parent" title="http://www1.erlang.org/doc/man/erlang.html#error-2">http://www1.erlang.org/doc/man/erlang.html#error-2</a></li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
456
457
458</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 456</span>
<span class='kw'>def</span> <span class='id identifier rubyid_terminate'>terminate</span><span class='lparen'>(</span><span class='id identifier rubyid_pid'>pid</span> <span class='op'>=</span> <span class='kw'>nil</span><span class='comma'>,</span> <span class='id identifier rubyid_reason'>reason</span><span class='comma'>,</span> <span class='label'>value:</span> <span class='kw'>nil</span><span class='rparen'>)</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_terminate'>terminate</span> <span class='id identifier rubyid_pid'>pid</span><span class='comma'>,</span> <span class='id identifier rubyid_reason'>reason</span><span class='comma'>,</span> <span class='label'>value:</span> <span class='id identifier rubyid_value'>value</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="terminated-instance_method">
#<strong>terminated</strong> ⇒ <tt><span class='object_link'><a href="../Promises/Future.html" title="Concurrent::Promises::Future (class)">Promises::Future</a></span></tt>
</h3><div class="docstring">
<div class="discussion">
<p>Returns a future which is resolved with
the final result of the actor that is either the reason for
termination or a value if terminated normally.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="../Promises/Future.html" title="Concurrent::Promises::Future (class)">Promises::Future</a></span></tt>)</span>
—
<div class='inline'><p>a future which is resolved with
the final result of the actor that is either the reason for
termination or a value if terminated normally.</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
140
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142</pre>
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<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 140</span>
<span class='kw'>def</span> <span class='id identifier rubyid_terminated'>terminated</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_terminated'>terminated</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="trap-instance_method">
#<strong>trap</strong>(value = true) ⇒ <tt>true</tt>, <tt>false</tt>
</h3><div class="docstring">
<div class="discussion">
<p>When trap is set to true,
exit signals arriving to a actor are converted to <span class='object_link'><a href="Terminated.html" title="Concurrent::ErlangActor::Terminated (class)">Terminated</a></span> messages,
which can be received as ordinary messages.
If trap is set to false,
the actor exits
if it receives an exit signal other than normal
and the exit signal is propagated to its linked actors.
Application actors should normally not trap exits.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>value</span>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
<em class="default">(defaults to: <tt>true</tt>)</em>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
—
<div class='inline'><p>the old value of the flag</p>
</div>
</li>
</ul>
<p class="tag_title">See Also:</p>
<ul class="see">
<li><a href="http://www1.erlang.org/doc/man/erlang.html#process_flag-2" target="_parent" title="http://www1.erlang.org/doc/man/erlang.html#process_flag-2">http://www1.erlang.org/doc/man/erlang.html#process_flag-2</a></li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
172
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 172</span>
<span class='kw'>def</span> <span class='id identifier rubyid_trap'>trap</span><span class='lparen'>(</span><span class='id identifier rubyid_value'>value</span> <span class='op'>=</span> <span class='kw'>true</span><span class='rparen'>)</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_trap'>trap</span><span class='lparen'>(</span><span class='id identifier rubyid_value'>value</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="traps?-instance_method">
#<strong>traps?</strong> ⇒ <tt>true</tt>, <tt>false</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Returns does this actor trap exit messages?</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
—
<div class='inline'><p>does this actor trap exit messages?</p>
</div>
</li>
</ul>
<p class="tag_title">See Also:</p>
<ul class="see">
<li><a href="http://www1.erlang.org/doc/man/erlang.html#process_flag-2" target="_parent" title="http://www1.erlang.org/doc/man/erlang.html#process_flag-2">http://www1.erlang.org/doc/man/erlang.html#process_flag-2</a></li>
</ul>
</div><table class="source_code">
<tr>
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<pre class="lines">
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<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 156</span>
<span class='kw'>def</span> <span class='id identifier rubyid_traps?'>traps?</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_traps?'>traps?</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="unlink-instance_method">
#<strong>unlink</strong>(pid) ⇒ <tt>true</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Removes the link, if there is one,
between the calling actor and the actor referred to by pid.</p>
<p>Returns true and does not fail, even if there is no link to Id, or if Id does not exist.</p>
<p>Once unlink(pid) has returned
it is guaranteed
that the link between the caller and the actor referred to by pid
has no effect on the caller in the future (unless the link is setup again).
If caller is trapping exits,
an <span class='object_link'><a href="Terminated.html" title="Concurrent::ErlangActor::Terminated (class)">Terminated</a></span> message due to the link might have been placed
in the caller's message queue prior to the call, though.</p>
<p>Note, the <span class='object_link'><a href="Terminated.html" title="Concurrent::ErlangActor::Terminated (class)">Terminated</a></span> message can be the result of the link,
but can also be the result of calling #terminate method externally.
Therefore, it may be appropriate to cleanup the message queue
when trapping exits after the call to unlink, as follow:</p>
<pre class="code ruby"><code class="ruby"><span class='id identifier rubyid_receive'>receive</span> <span class='id identifier rubyid_on'>on</span><span class='lparen'>(</span><span class='const'><span class='object_link'><a href="EnvironmentConstants/And.html" title="Concurrent::ErlangActor::EnvironmentConstants::And (class)">And</a></span></span><span class='lbracket'>[</span><span class='const'><span class='object_link'><a href="Terminated.html" title="Concurrent::ErlangActor::Terminated (class)">Terminated</a></span></span><span class='comma'>,</span> <span class='tlambda'>-></span> <span class='id identifier rubyid_e'>e</span> <span class='tlambeg'>{</span> <span class='id identifier rubyid_e'>e</span><span class='period'>.</span><span class='id identifier rubyid_pid'>pid</span> <span class='op'>==</span> <span class='id identifier rubyid_pid'>pid</span> <span class='rbrace'>}</span><span class='rbracket'>]</span><span class='comma'>,</span> <span class='kw'>true</span><span class='rparen'>)</span><span class='comma'>,</span> <span class='label'>timeout:</span> <span class='int'>0</span>
</code></pre>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>true</tt>)</span>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
258
259
260</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/edge/erlang_actor.rb', line 258</span>
<span class='kw'>def</span> <span class='id identifier rubyid_unlink'>unlink</span><span class='lparen'>(</span><span class='id identifier rubyid_pid'>pid</span><span class='rparen'>)</span>
<span class='ivar'>@Actor</span><span class='period'>.</span><span class='id identifier rubyid_unlink'>unlink</span><span class='lparen'>(</span><span class='id identifier rubyid_pid'>pid</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
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