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LazyRegister.html
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LazyRegister.html
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<!DOCTYPE html>
<html>
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Class: Concurrent::LazyRegister
— Concurrent Ruby
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<div id="content"><h1>Class: Concurrent::LazyRegister
</h1>
<div class="box_info">
<dl>
<dt>Inherits:</dt>
<dd>
<span class="inheritName"><span class='object_link'><a href="Synchronization/Object.html" title="Concurrent::Synchronization::Object (class)">Synchronization::Object</a></span></span>
<ul class="fullTree">
<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::LazyRegister</li>
</ul>
<a href="#" class="inheritanceTree">show all</a>
</dd>
</dl>
<dl>
<dt>Defined in:</dt>
<dd>lib-edge/concurrent/lazy_register.rb</dd>
</dl>
</div>
<h2>Overview</h2><div class="docstring">
<div class="discussion">
<div class="note notetag">
<strong>Note:</strong>
<div class='inline'><p><strong>Edge Features</strong> are under active development and may change frequently.</p>
<ul>
<li> Deprecations are not added before incompatible changes.</li>
<li> Edge version: <em>major</em> is always 0, <em>minor</em> bump means incompatible change,
<em>patch</em> bump means compatible change.</li>
<li> Edge features may also lack tests and documentation.</li>
<li> Features developed in <code>concurrent-ruby-edge</code> are expected to move
to <code>concurrent-ruby</code> when finalised.</li>
</ul>
</div>
</div>
<p>Hash-like collection that store lazy evaluated values.</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_register'>register</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'>LazyRegister</span><span class='period'>.</span><span class='id identifier rubyid_new'><span class='object_link'><a href="Synchronization/Object.html#new-class_method" title="Concurrent::Synchronization::Object.new (method)">new</a></span></span>
<span class='comment'>#=> #<Concurrent::LazyRegister:0x007fd7ecd5e230 @Data=#<Concurrent::AtomicReference:0x007fd7ecd5e1e0>>
</span><span class='id identifier rubyid_register'>register</span><span class='lbracket'>[</span><span class='symbol'>:key</span><span class='rbracket'>]</span>
<span class='comment'>#=> nil
</span><span class='id identifier rubyid_register'>register</span><span class='period'>.</span><span class='id identifier rubyid_add'>add</span><span class='lparen'>(</span><span class='symbol'>:key</span><span class='rparen'>)</span> <span class='lbrace'>{</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="Actor.html" title="Concurrent::Actor (module)">Actor</a></span></span><span class='period'>.</span><span class='id identifier rubyid_spawn!'><span class='object_link'><a href="Actor.html#spawn!-class_method" title="Concurrent::Actor.spawn! (method)">spawn!</a></span></span><span class='lparen'>(</span><span class='const'><span class='object_link'><a href="Actor.html" title="Concurrent::Actor (module)">Actor</a></span></span><span class='op'>::</span><span class='const'>AdHoc</span><span class='comma'>,</span> <span class='symbol'>:ping</span><span class='rparen'>)</span> <span class='lbrace'>{</span> <span class='tlambda'>-></span> <span class='id identifier rubyid_message'>message</span> <span class='tlambeg'>{</span> <span class='id identifier rubyid_message'>message</span> <span class='rbrace'>}</span> <span class='rbrace'>}</span> <span class='rbrace'>}</span>
<span class='comment'>#=> #<Concurrent::LazyRegister:0x007fd7ecd5e230 @Data=#<Concurrent::AtomicReference:0x007fd7ecd5e1e0>>
</span><span class='id identifier rubyid_register'>register</span><span class='lbracket'>[</span><span class='symbol'>:key</span><span class='rbracket'>]</span>
<span class='comment'>#=> #<Concurrent::Actor::Reference /ping (Concurrent::Actor::AdHoc)></span></code></pre>
</div>
</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="#[]-instance_method" title="#[] (instance method)">#<strong>[]</strong>(key) ⇒ Object </a>
</span>
<span class="summary_desc"><div class='inline'><p>Element reference.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#initialize-instance_method" title="#initialize (instance method)">#<strong>initialize</strong> ⇒ LazyRegister </a>
</span>
<span class="note title constructor">constructor</span>
<span class="summary_desc"><div class='inline'><p>A new instance of LazyRegister.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#register-instance_method" title="#register (instance method)">#<strong>register</strong>(key) { ... } ⇒ LazyRegister </a>
(also: #add, #store)
</span>
<span class="summary_desc"><div class='inline'><p>Element assignment.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#registered%3F-instance_method" title="#registered? (instance method)">#<strong>registered?</strong>(key) ⇒ true, false </a>
(also: #key?, #has_key?)
</span>
<span class="summary_desc"><div class='inline'><p>Returns true if the given key is present.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#unregister-instance_method" title="#unregister (instance method)">#<strong>unregister</strong>(key) ⇒ LazyRegister </a>
(also: #remove, #delete)
</span>
<span class="summary_desc"><div class='inline'><p>Un-registers the object under key, realized or not.</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::LazyRegister (class)">LazyRegister</a></span></tt>
</h3><div class="docstring">
<div class="discussion">
<p>Returns a new instance of LazyRegister</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
25
26
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28</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/lazy_register.rb', line 25</span>
<span class='kw'>def</span> <span class='id identifier rubyid_initialize'>initialize</span>
<span class='kw'>super</span>
<span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_data'>data</span> <span class='op'>=</span> <span class='lbrace'>{</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="[]-instance_method">
#<strong>[]</strong>(key) ⇒ <tt>Object</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Element reference. Retrieves the value object corresponding to the
key object. Returns nil if the key is not found. Raises an exception
if the stored item raised an exception when the block was evaluated.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>key</span>
<span class='type'>(<tt>Object</tt>)</span>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>value stored for the key or nil if the key is not found</p>
</div>
</li>
</ul>
<p class="tag_title">Raises:</p>
<ul class="raise">
<li>
<span class='type'></span>
<div class='inline'><p>Exception when the initialization block fails</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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41</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/lazy_register.rb', line 38</span>
<span class='kw'>def</span> <span class='op'>[]</span><span class='lparen'>(</span><span class='id identifier rubyid_key'>key</span><span class='rparen'>)</span>
<span class='id identifier rubyid_delay'>delay</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='id identifier rubyid_key'>key</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_delay'>delay</span> <span class='op'>?</span> <span class='id identifier rubyid_delay'>delay</span><span class='period'>.</span><span class='id identifier rubyid_value!'>value!</span> <span class='op'>:</span> <span class='kw'>nil</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="register-instance_method">
#<strong>register</strong>(key) { ... } ⇒ <tt><span class='object_link'><a href="" title="Concurrent::LazyRegister (class)">LazyRegister</a></span></tt>
<span class="aliases">Also known as:
<span class="names"><span id='add-instance_method'>add</span>, <span id='store-instance_method'>store</span></span>
</span>
</h3><div class="docstring">
<div class="discussion">
<p>Element assignment. Associates the value given by value with the
key given by key.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>key</span>
<span class='type'>(<tt>Object</tt>)</span>
</li>
</ul>
<p class="tag_title">Yields:</p>
<ul class="yield">
<li>
<span class='type'></span>
<div class='inline'><p>the object to store under the key</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="" title="Concurrent::LazyRegister (class)">LazyRegister</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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65</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/lazy_register.rb', line 61</span>
<span class='kw'>def</span> <span class='id identifier rubyid_register'>register</span><span class='lparen'>(</span><span class='id identifier rubyid_key'>key</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_delay'>delay</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="Delay.html" title="Concurrent::Delay (class)">Delay</a></span></span><span class='period'>.</span><span class='id identifier rubyid_new'><span class='object_link'><a href="Delay.html#initialize-instance_method" title="Concurrent::Delay#initialize (method)">new</a></span></span><span class='lparen'>(</span><span class='label'>executor:</span> <span class='symbol'>:immediate</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_update_data'>update_data</span> <span class='lbrace'>{</span> <span class='op'>|</span><span class='id identifier rubyid_h'>h</span><span class='op'>|</span> <span class='id identifier rubyid_h'>h</span><span class='period'>.</span><span class='id identifier rubyid_merge'>merge</span><span class='lparen'>(</span><span class='id identifier rubyid_key'>key</span> <span class='op'>=></span> <span class='id identifier rubyid_delay'>delay</span><span class='rparen'>)</span> <span class='rbrace'>}</span>
<span class='kw'>self</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="registered?-instance_method">
#<strong>registered?</strong>(key) ⇒ <tt>true</tt>, <tt>false</tt>
<span class="aliases">Also known as:
<span class="names"><span id='key?-instance_method'>key?</span>, <span id='has_key?-instance_method'>has_key?</span></span>
</span>
</h3><div class="docstring">
<div class="discussion">
<p>Returns true if the given key is present.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>key</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>if the key is registered</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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49</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/lazy_register.rb', line 47</span>
<span class='kw'>def</span> <span class='id identifier rubyid_registered?'>registered?</span><span class='lparen'>(</span><span class='id identifier rubyid_key'>key</span><span class='rparen'>)</span>
<span class='id identifier rubyid_data'>data</span><span class='period'>.</span><span class='id identifier rubyid_key?'>key?</span><span class='lparen'>(</span><span class='id identifier rubyid_key'>key</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="unregister-instance_method">
#<strong>unregister</strong>(key) ⇒ <tt><span class='object_link'><a href="" title="Concurrent::LazyRegister (class)">LazyRegister</a></span></tt>
<span class="aliases">Also known as:
<span class="names"><span id='remove-instance_method'>remove</span>, <span id='delete-instance_method'>delete</span></span>
</span>
</h3><div class="docstring">
<div class="discussion">
<p>Un-registers the object under key, realized or not.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>key</span>
<span class='type'>(<tt>Object</tt>)</span>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="" title="Concurrent::LazyRegister (class)">LazyRegister</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>
<td>
<pre class="code"><span class="info file"># File 'lib-edge/concurrent/lazy_register.rb', line 75</span>
<span class='kw'>def</span> <span class='id identifier rubyid_unregister'>unregister</span><span class='lparen'>(</span><span class='id identifier rubyid_key'>key</span><span class='rparen'>)</span>
<span class='id identifier rubyid_update_data'>update_data</span> <span class='lbrace'>{</span> <span class='op'>|</span><span class='id identifier rubyid_h'>h</span><span class='op'>|</span> <span class='id identifier rubyid_h'>h</span><span class='period'>.</span><span class='id identifier rubyid_dup'>dup</span><span class='period'>.</span><span class='id identifier rubyid_tap'>tap</span> <span class='lbrace'>{</span> <span class='op'>|</span><span class='id identifier rubyid_j'>j</span><span class='op'>|</span> <span class='id identifier rubyid_j'>j</span><span class='period'>.</span><span class='id identifier rubyid_delete'>delete</span><span class='lparen'>(</span><span class='id identifier rubyid_key'>key</span><span class='rparen'>)</span> <span class='rbrace'>}</span> <span class='rbrace'>}</span>
<span class='kw'>self</span>
<span class='kw'>end</span></pre>
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