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<title>Class: Needle::LoggingInterceptor</title>
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<td><strong>Class</strong></td>
<td class="class-name-in-header">Needle::LoggingInterceptor</td>
</tr>
<tr class="top-aligned-row">
<td><strong>In:</strong></td>
<td>
<a href="../../files/lib/needle/logging-interceptor_rb.html">
lib/needle/logging-interceptor.rb
</a>
<br />
</td>
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<td><strong>Parent:</strong></td>
<td>
Object
</td>
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<p>
A <a href="LoggingInterceptor.html">LoggingInterceptor</a> is an
interceptor object that logs method invocations and exceptions. It includes
the <a href="IncludeExclude.html">IncludeExclude</a> functionality.
</p>
</div>
</div>
<div id="method-list">
<h3 class="section-bar">Methods</h3>
<div class="name-list">
<a href="#M000077">new</a>
<a href="#M000078">process</a>
</div>
</div>
</div>
<!-- if includes -->
<div id="includes">
<h3 class="section-bar">Included Modules</h3>
<div id="includes-list">
<span class="include-name"><a href="IncludeExclude.html">IncludeExclude</a></span>
</div>
</div>
<div id="section">
<!-- if method_list -->
<div id="methods">
<h3 class="section-bar">Public Class methods</h3>
<div id="method-M000077" class="method-detail">
<a name="M000077"></a>
<div class="method-heading">
<a href="#M000077" class="method-signature">
<span class="method-name">new</span><span class="method-args">( point, parms )</span>
</a>
</div>
<div class="method-description">
<p>
Create a new <a href="LoggingInterceptor.html">LoggingInterceptor</a> for
the given service point, with the given list of include and exclude
patterns. The logger object will be created as well, named with the service
point’s full name.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000077-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000077-source">
<pre>
<span class="ruby-comment cmt"># File lib/needle/logging-interceptor.rb, line 29</span>
29: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>( <span class="ruby-identifier">point</span>, <span class="ruby-identifier">parms</span> )
30: <span class="ruby-ivar">@log</span> = <span class="ruby-identifier">point</span>.<span class="ruby-identifier">container</span>.<span class="ruby-identifier">logs</span>.<span class="ruby-identifier">get</span>( <span class="ruby-identifier">point</span>.<span class="ruby-identifier">fullname</span> )
31:
32: <span class="ruby-ivar">@includes</span> = <span class="ruby-identifier">build_map</span>( <span class="ruby-identifier">parms</span>[ <span class="ruby-identifier">:include</span> ] )
33: <span class="ruby-ivar">@excludes</span> = <span class="ruby-identifier">build_map</span>( <span class="ruby-identifier">parms</span>[ <span class="ruby-identifier">:exclude</span> ] )
34: <span class="ruby-keyword kw">end</span>
</pre>
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</div>
<h3 class="section-bar">Public Instance methods</h3>
<div id="method-M000078" class="method-detail">
<a name="M000078"></a>
<div class="method-heading">
<a href="#M000078" class="method-signature">
<span class="method-name">process</span><span class="method-args">( chain, context )</span>
</a>
</div>
<div class="method-description">
<p>
Processes a method invocation context. If the current log has debugging
activated, and the requested method is not excluded by the
interceptor’s exclude and include patterns, then a message will be
written for the method’s invocation, its return code, and any
exception that is thrown.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000078-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000078-source">
<pre>
<span class="ruby-comment cmt"># File lib/needle/logging-interceptor.rb, line 41</span>
41: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">process</span>( <span class="ruby-identifier">chain</span>, <span class="ruby-identifier">context</span> )
42: <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@log</span>.<span class="ruby-identifier">debug?</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">match</span>( <span class="ruby-identifier">context</span> )
43: <span class="ruby-identifier">args</span> = <span class="ruby-identifier">context</span>.<span class="ruby-identifier">args</span>.<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">i</span><span class="ruby-operator">|</span> <span class="ruby-identifier">i</span>.<span class="ruby-identifier">inspect</span> } .<span class="ruby-identifier">join</span>( <span class="ruby-value str">', '</span> )
44: <span class="ruby-ivar">@log</span>.<span class="ruby-identifier">debug</span> <span class="ruby-node">"#{context.sym}( #{args} )"</span>
45:
46: <span class="ruby-keyword kw">begin</span>
47: <span class="ruby-identifier">result</span> = <span class="ruby-identifier">chain</span>.<span class="ruby-identifier">process_next</span>( <span class="ruby-identifier">context</span> )
48: <span class="ruby-keyword kw">rescue</span> <span class="ruby-constant">Exception</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">e</span>
49: <span class="ruby-ivar">@log</span>.<span class="ruby-identifier">debug</span> <span class="ruby-node">"#{context.sym} raised #{e.message.inspect} (#{e.class})"</span>
50: <span class="ruby-identifier">raise</span>
51: <span class="ruby-keyword kw">end</span>
52:
53: <span class="ruby-ivar">@log</span>.<span class="ruby-identifier">debug</span> <span class="ruby-node">"#{context.sym} => #{result.inspect}"</span>
54: <span class="ruby-keyword kw">return</span> <span class="ruby-identifier">result</span>
55: <span class="ruby-keyword kw">else</span>
56: <span class="ruby-keyword kw">return</span> <span class="ruby-identifier">chain</span>.<span class="ruby-identifier">process_next</span>( <span class="ruby-identifier">context</span> )
57: <span class="ruby-keyword kw">end</span>
58: <span class="ruby-keyword kw">end</span>
</pre>
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