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CopyOnNotifyObserverSet.html
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CopyOnNotifyObserverSet.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>
Class: Concurrent::Collection::CopyOnNotifyObserverSet
— Concurrent Ruby
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<div id="content"><h1>Class: Concurrent::Collection::CopyOnNotifyObserverSet
<span class="private note title">Private</span>
</h1>
<div class="box_info">
<dl>
<dt>Inherits:</dt>
<dd>
<span class="inheritName"><span class='object_link'>Synchronization::LockableObject</span></span>
<ul class="fullTree">
<li>Object</li>
<li class="next"><span class='object_link'>Synchronization::LockableObject</span></li>
<li class="next">Concurrent::Collection::CopyOnNotifyObserverSet</li>
</ul>
<a href="#" class="inheritanceTree">show all</a>
</dd>
</dl>
<dl>
<dt>Defined in:</dt>
<dd>lib/concurrent/collection/copy_on_notify_observer_set.rb</dd>
</dl>
</div>
<h2>Overview</h2><div class="docstring">
<div class="discussion">
<p class="note private">
<strong>This class is part of a private API.</strong>
You should avoid using this class if possible, as it may be removed or be changed in the future.
</p>
<p>A thread safe observer set implemented using copy-on-read approach:
observers are added and removed from a thread safe collection; every time
a notification is required the internal data structure is copied to
prevent concurrency issues</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="#add_observer-instance_method" title="#add_observer (instance method)">#<strong>add_observer</strong>(observer = nil, func = :update, &block) ⇒ Object </a>
</span>
<span class="private note title">private</span>
<span class="summary_desc"><div class='inline'><p>Adds an observer to this set.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#count_observers-instance_method" title="#count_observers (instance method)">#<strong>count_observers</strong> ⇒ Integer </a>
</span>
<span class="private note title">private</span>
<span class="summary_desc"><div class='inline'><p>Return the number of observers associated with this object.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#delete_observer-instance_method" title="#delete_observer (instance method)">#<strong>delete_observer</strong>(observer) ⇒ Object </a>
</span>
<span class="private note title">private</span>
<span class="summary_desc"><div class='inline'><p>Remove <code>observer</code> as an observer on this object so that it will no longer receive notifications.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#delete_observers-instance_method" title="#delete_observers (instance method)">#<strong>delete_observers</strong> ⇒ Observable </a>
</span>
<span class="private note title">private</span>
<span class="summary_desc"><div class='inline'><p>Remove all observers associated with this object.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#initialize-instance_method" title="#initialize (instance method)">#<strong>initialize</strong> ⇒ CopyOnNotifyObserverSet </a>
</span>
<span class="note title constructor">constructor</span>
<span class="private note title">private</span>
<span class="summary_desc"><div class='inline'><p>A new instance of CopyOnNotifyObserverSet.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#notify_and_delete_observers-instance_method" title="#notify_and_delete_observers (instance method)">#<strong>notify_and_delete_observers</strong>(*args, &block) ⇒ CopyOnWriteObserverSet </a>
</span>
<span class="private note title">private</span>
<span class="summary_desc"><div class='inline'><p>Notifies all registered observers with optional args and deletes them.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#notify_observers-instance_method" title="#notify_observers (instance method)">#<strong>notify_observers</strong>(*args, &block) ⇒ CopyOnWriteObserverSet </a>
</span>
<span class="private note title">private</span>
<span class="summary_desc"><div class='inline'><p>Notifies all registered observers with optional args.</p>
</div></span>
</li>
</ul>
<div id="constructor_details" class="method_details_list">
<h2>Constructor Details</h2>
<div class="method_details first">
<h3 class="signature first" id="initialize-instance_method">
#<strong>initialize</strong> ⇒ <tt><span class='object_link'><a href="" title="Concurrent::Collection::CopyOnNotifyObserverSet (class)">CopyOnNotifyObserverSet</a></span></tt>
</h3><div class="docstring">
<div class="discussion">
<p class="note private">
<strong>This method is part of a private API.</strong>
You should avoid using this method if possible, as it may be removed or be changed in the future.
</p>
<p>Returns a new instance of CopyOnNotifyObserverSet</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
14
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17</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/collection/copy_on_notify_observer_set.rb', line 14</span>
<span class='kw'>def</span> <span class='id identifier rubyid_initialize'>initialize</span>
<span class='kw'>super</span><span class='lparen'>(</span><span class='rparen'>)</span>
<span class='id identifier rubyid_synchronize'>synchronize</span> <span class='lbrace'>{</span> <span class='id identifier rubyid_ns_initialize'>ns_initialize</span> <span class='rbrace'>}</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
</div>
<div id="instance_method_details" class="method_details_list">
<h2>Instance Method Details</h2>
<div class="method_details first">
<h3 class="signature first" id="add_observer-instance_method">
#<strong>add_observer</strong>(observer = nil, func = :update, &block) ⇒ <tt>Object</tt>
</h3><div class="docstring">
<div class="discussion">
<p class="note private">
<strong>This method is part of a private API.</strong>
You should avoid using this method if possible, as it may be removed or be changed in the future.
</p>
<p>Adds an observer to this set. If a block is passed, the observer will be
created by this method and no other params should be passed.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>observer</span>
<span class='type'>(<tt>Object</tt>)</span>
<em class="default">(defaults to: <tt>nil</tt>)</em>
—
<div class='inline'><p>the observer to add</p>
</div>
</li>
<li>
<span class='name'>func</span>
<span class='type'>(<tt>Symbol</tt>)</span>
<em class="default">(defaults to: <tt>:update</tt>)</em>
—
<div class='inline'><p>the function to call on the observer during notification.
Default is :update</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>the added observer</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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36</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/collection/copy_on_notify_observer_set.rb', line 20</span>
<span class='kw'>def</span> <span class='id identifier rubyid_add_observer'>add_observer</span><span class='lparen'>(</span><span class='id identifier rubyid_observer'>observer</span> <span class='op'>=</span> <span class='kw'>nil</span><span class='comma'>,</span> <span class='id identifier rubyid_func'>func</span> <span class='op'>=</span> <span class='symbol'>:update</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='kw'>if</span> <span class='id identifier rubyid_observer'>observer</span><span class='period'>.</span><span class='id identifier rubyid_nil?'>nil?</span> <span class='op'>&&</span> <span class='id identifier rubyid_block'>block</span><span class='period'>.</span><span class='id identifier rubyid_nil?'>nil?</span>
<span class='id identifier rubyid_raise'>raise</span> <span class='const'>ArgumentError</span><span class='comma'>,</span> <span class='tstring'><span class='tstring_beg'>'</span><span class='tstring_content'>should pass observer as a first argument or block</span><span class='tstring_end'>'</span></span>
<span class='kw'>elsif</span> <span class='id identifier rubyid_observer'>observer</span> <span class='op'>&&</span> <span class='id identifier rubyid_block'>block</span>
<span class='id identifier rubyid_raise'>raise</span> <span class='const'>ArgumentError</span><span class='period'>.</span><span class='id identifier rubyid_new'>new</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>'</span><span class='tstring_content'>cannot provide both an observer and a block</span><span class='tstring_end'>'</span></span><span class='rparen'>)</span>
<span class='kw'>end</span>
<span class='kw'>if</span> <span class='id identifier rubyid_block'>block</span>
<span class='id identifier rubyid_observer'>observer</span> <span class='op'>=</span> <span class='id identifier rubyid_block'>block</span>
<span class='id identifier rubyid_func'>func</span> <span class='op'>=</span> <span class='symbol'>:call</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_synchronize'>synchronize</span> <span class='kw'>do</span>
<span class='ivar'>@observers</span><span class='lbracket'>[</span><span class='id identifier rubyid_observer'>observer</span><span class='rbracket'>]</span> <span class='op'>=</span> <span class='id identifier rubyid_func'>func</span>
<span class='id identifier rubyid_observer'>observer</span>
<span class='kw'>end</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="count_observers-instance_method">
#<strong>count_observers</strong> ⇒ <tt>Integer</tt>
</h3><div class="docstring">
<div class="discussion">
<p class="note private">
<strong>This method is part of a private API.</strong>
You should avoid using this method if possible, as it may be removed or be changed in the future.
</p>
<p>Return the number of observers associated with this object.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Integer</tt>)</span>
—
<div class='inline'><p>the observers count</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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57</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/collection/copy_on_notify_observer_set.rb', line 55</span>
<span class='kw'>def</span> <span class='id identifier rubyid_count_observers'>count_observers</span>
<span class='id identifier rubyid_synchronize'>synchronize</span> <span class='lbrace'>{</span> <span class='ivar'>@observers</span><span class='period'>.</span><span class='id identifier rubyid_count'>count</span> <span class='rbrace'>}</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="delete_observer-instance_method">
#<strong>delete_observer</strong>(observer) ⇒ <tt>Object</tt>
</h3><div class="docstring">
<div class="discussion">
<p class="note private">
<strong>This method is part of a private API.</strong>
You should avoid using this method if possible, as it may be removed or be changed in the future.
</p>
<p>Remove <code>observer</code> as an observer on this object so that it will no
longer receive notifications.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>observer</span>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>the observer to remove</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>the deleted observer</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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44</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/collection/copy_on_notify_observer_set.rb', line 39</span>
<span class='kw'>def</span> <span class='id identifier rubyid_delete_observer'>delete_observer</span><span class='lparen'>(</span><span class='id identifier rubyid_observer'>observer</span><span class='rparen'>)</span>
<span class='id identifier rubyid_synchronize'>synchronize</span> <span class='kw'>do</span>
<span class='ivar'>@observers</span><span class='period'>.</span><span class='id identifier rubyid_delete'>delete</span><span class='lparen'>(</span><span class='id identifier rubyid_observer'>observer</span><span class='rparen'>)</span>
<span class='id identifier rubyid_observer'>observer</span>
<span class='kw'>end</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="delete_observers-instance_method">
#<strong>delete_observers</strong> ⇒ <tt>Observable</tt>
</h3><div class="docstring">
<div class="discussion">
<p class="note private">
<strong>This method is part of a private API.</strong>
You should avoid using this method if possible, as it may be removed or be changed in the future.
</p>
<p>Remove all observers associated with this object.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Observable</tt>)</span>
—
<div class='inline'><p>self</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
47
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<pre class="code"><span class="info file"># File 'lib/concurrent/collection/copy_on_notify_observer_set.rb', line 47</span>
<span class='kw'>def</span> <span class='id identifier rubyid_delete_observers'>delete_observers</span>
<span class='id identifier rubyid_synchronize'>synchronize</span> <span class='kw'>do</span>
<span class='ivar'>@observers</span><span class='period'>.</span><span class='id identifier rubyid_clear'>clear</span>
<span class='kw'>self</span>
<span class='kw'>end</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="notify_and_delete_observers-instance_method">
#<strong>notify_and_delete_observers</strong>(*args, &block) ⇒ <tt><span class='object_link'><a href="CopyOnWriteObserverSet.html" title="Concurrent::Collection::CopyOnWriteObserverSet (class)">CopyOnWriteObserverSet</a></span></tt>
</h3><div class="docstring">
<div class="discussion">
<p class="note private">
<strong>This method is part of a private API.</strong>
You should avoid using this method if possible, as it may be removed or be changed in the future.
</p>
<p>Notifies all registered observers with optional args and deletes them.</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 to be passed to each observer</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="CopyOnWriteObserverSet.html" title="Concurrent::Collection::CopyOnWriteObserverSet (class)">CopyOnWriteObserverSet</a></span></tt>)</span>
—
<div class='inline'><p>self</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/collection/copy_on_notify_observer_set.rb', line 72</span>
<span class='kw'>def</span> <span class='id identifier rubyid_notify_and_delete_observers'>notify_and_delete_observers</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='id identifier rubyid_observers'>observers</span> <span class='op'>=</span> <span class='id identifier rubyid_duplicate_and_clear_observers'>duplicate_and_clear_observers</span>
<span class='id identifier rubyid_notify_to'>notify_to</span><span class='lparen'>(</span><span class='id identifier rubyid_observers'>observers</span><span class='comma'>,</span> <span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='kw'>self</span>
<span class='kw'>end</span></pre>
</td>
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</table>
</div>
<div class="method_details ">
<h3 class="signature " id="notify_observers-instance_method">
#<strong>notify_observers</strong>(*args, &block) ⇒ <tt><span class='object_link'><a href="CopyOnWriteObserverSet.html" title="Concurrent::Collection::CopyOnWriteObserverSet (class)">CopyOnWriteObserverSet</a></span></tt>
</h3><div class="docstring">
<div class="discussion">
<p class="note private">
<strong>This method is part of a private API.</strong>
You should avoid using this method if possible, as it may be removed or be changed in the future.
</p>
<p>Notifies all registered observers with optional args</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 to be passed to each observer</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="CopyOnWriteObserverSet.html" title="Concurrent::Collection::CopyOnWriteObserverSet (class)">CopyOnWriteObserverSet</a></span></tt>)</span>
—
<div class='inline'><p>self</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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66</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/collection/copy_on_notify_observer_set.rb', line 62</span>
<span class='kw'>def</span> <span class='id identifier rubyid_notify_observers'>notify_observers</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='id identifier rubyid_observers'>observers</span> <span class='op'>=</span> <span class='id identifier rubyid_duplicate_observers'>duplicate_observers</span>
<span class='id identifier rubyid_notify_to'>notify_to</span><span class='lparen'>(</span><span class='id identifier rubyid_observers'>observers</span><span class='comma'>,</span> <span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='kw'>self</span>
<span class='kw'>end</span></pre>
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