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<div class="title">metrics.cc</div> </div>
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<a href="metrics_8cc.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">// Copyright 2012 Cloudera Inc.</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">// you may not use this file except in compliance with the License.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment">// You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment">// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment">// See the License for the specific language governing permissions and</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment">// limitations under the License.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="metrics_8h.html">util/metrics.h</a>&quot;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="preprocessor">#include &lt;sstream&gt;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor">#include &lt;boost/algorithm/string/join.hpp&gt;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#include &lt;boost/bind.hpp&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="preprocessor">#include &lt;boost/mem_fn.hpp&gt;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="preprocessor">#include &lt;boost/math/special_functions/fpclassify.hpp&gt;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="preprocessor">#include &lt;gutil/strings/substitute.h&gt;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="preprocessor">#include &lt;rapidjson/stringbuffer.h&gt;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#include &lt;rapidjson/prettywriter.h&gt;</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="logging_8h.html">common/logging.h</a>&quot;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="impalad-metrics_8h.html">util/impalad-metrics.h</a>&quot;</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="names_8h.html">common/names.h</a>&quot;</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="keyword">using namespace </span>impala;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="keyword">using namespace </span>rapidjson;</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="keyword">using namespace </span>strings;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="keyword">namespace </span>impala {</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="keyword">template</span> &lt;&gt;</div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="namespaceimpala.html#ab171f6fa40aed1dce51c6639818f22fe"> 38</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="namespaceimpala.html#ab171f6fa40aed1dce51c6639818f22fe">ToJsonValue&lt;string&gt;</a>(<span class="keyword">const</span> <span class="keywordtype">string</span>&amp; value, <span class="keyword">const</span> TUnit::type unit,</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; Document* document, Value* out_val) {</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; Value val(value.c_str(), document-&gt;GetAllocator());</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; *out_val = val;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;}</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;}</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="classimpala_1_1Metric.html#a05010f15c634161716da4e8451dba06d"> 46</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classimpala_1_1Metric.html#a05010f15c634161716da4e8451dba06d">Metric::AddStandardFields</a>(Document* document, Value* val) {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; Value <a class="code" href="namespaceimpala.html#aaebb9aadfa9e5aec064bc26565df06d3">name</a>(key_.c_str(), document-&gt;GetAllocator());</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; val-&gt;AddMember(<span class="stringliteral">&quot;name&quot;</span>, <a class="code" href="namespaceimpala.html#aaebb9aadfa9e5aec064bc26565df06d3">name</a>, document-&gt;GetAllocator());</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; Value desc(description_.c_str(), document-&gt;GetAllocator());</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; val-&gt;AddMember(<span class="stringliteral">&quot;description&quot;</span>, desc, document-&gt;GetAllocator());</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; Value metric_value(ToHumanReadable().c_str(), document-&gt;GetAllocator());</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; val-&gt;AddMember(<span class="stringliteral">&quot;human_readable&quot;</span>, metric_value, document-&gt;GetAllocator());</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;}</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;</div>
<div class="line"><a name="l00055"></a><span class="lineno"><a class="line" href="classimpala_1_1MetricGroup.html#a190ad1430e74a11561fe1de4f47ebff8"> 55</a></span>&#160;<a class="code" href="classimpala_1_1MetricGroup.html#a190ad1430e74a11561fe1de4f47ebff8">MetricGroup::MetricGroup</a>(<span class="keyword">const</span> std::string&amp; <a class="code" href="namespaceimpala.html#aaebb9aadfa9e5aec064bc26565df06d3">name</a>)</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; : <a class="code" href="namespaceimpala.html#a1c183dc242f42291fbf439e78bebc8fa">obj_pool_</a>(new <a class="code" href="classimpala_1_1ObjectPool.html">ObjectPool</a>()), name_(name) { }</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;</div>
<div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="classimpala_1_1MetricGroup.html#a6cb85ed30deba3d54206aed936b9ec46"> 58</a></span>&#160;<a class="code" href="classimpala_1_1Status.html">Status</a> <a class="code" href="classimpala_1_1MetricGroup.html#a6cb85ed30deba3d54206aed936b9ec46">MetricGroup::Init</a>(<a class="code" href="classimpala_1_1Webserver.html">Webserver</a>* webserver) {</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keywordflow">if</span> (webserver != NULL) {</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <a class="code" href="classimpala_1_1Webserver.html#a15b9a034c37e397257603fda18de5d17">Webserver::UrlCallback</a> default_callback =</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; bind&lt;void&gt;(mem_fn(&amp;<a class="code" href="classimpala_1_1MetricGroup.html#ace59b4785d81836d904c266087db13ef">MetricGroup::CMCompatibleCallback</a>), <span class="keyword">this</span>, _1, _2);</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; webserver-&gt;<a class="code" href="classimpala_1_1Webserver.html#ab6d6b78ae57c1c61b200dcb05ecf8055">RegisterUrlCallback</a>(<span class="stringliteral">&quot;/jsonmetrics&quot;</span>, <span class="stringliteral">&quot;legacy-metrics.tmpl&quot;</span>,</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; default_callback, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <a class="code" href="classimpala_1_1Webserver.html#a15b9a034c37e397257603fda18de5d17">Webserver::UrlCallback</a> json_callback =</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; bind&lt;void&gt;(mem_fn(&amp;<a class="code" href="classimpala_1_1MetricGroup.html#a287ba0720c177cef37622f165da2a9a5">MetricGroup::TemplateCallback</a>), <span class="keyword">this</span>, _1, _2);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; webserver-&gt;<a class="code" href="classimpala_1_1Webserver.html#ab6d6b78ae57c1c61b200dcb05ecf8055">RegisterUrlCallback</a>(<span class="stringliteral">&quot;/metrics&quot;</span>, <span class="stringliteral">&quot;metrics.tmpl&quot;</span>, json_callback);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; }</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classimpala_1_1Status.html#a580565665ea944eb64f3f495b1bee1e0">Status::OK</a>;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;}</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;</div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="classimpala_1_1MetricGroup.html#ace59b4785d81836d904c266087db13ef"> 73</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classimpala_1_1MetricGroup.html#ace59b4785d81836d904c266087db13ef">MetricGroup::CMCompatibleCallback</a>(<span class="keyword">const</span> <a class="code" href="classimpala_1_1Webserver.html#ac9f7aacffabb53e5c203ea7a3652802b">Webserver::ArgumentMap</a>&amp; args,</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; Document* document) {</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="comment">// If the request has a &#39;metric&#39; argument, search all top-level metrics for that metric</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="comment">// only. Otherwise, return document with list of all metrics at the top level.</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; Webserver::ArgumentMap::const_iterator metric_name = args.find(<span class="stringliteral">&quot;metric&quot;</span>);</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; lock_guard&lt;mutex&gt; l(<a class="code" href="classimpala_1_1MetricGroup.html#a74dcd8f2bee8f2500435dab191fac07d">lock_</a>);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordflow">if</span> (metric_name != args.end()) {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; MetricMap::const_iterator metric = <a class="code" href="classimpala_1_1MetricGroup.html#aeed58de43376fdb325782a2276ba9e63">metric_map_</a>.find(metric_name-&gt;second);</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordflow">if</span> (metric != <a class="code" href="classimpala_1_1MetricGroup.html#aeed58de43376fdb325782a2276ba9e63">metric_map_</a>.end()) {</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; metric-&gt;second-&gt;ToLegacyJson(document);</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; }</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; }</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; stack&lt;MetricGroup*&gt; groups;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; groups.push(<span class="keyword">this</span>);</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keywordflow">while</span> (!groups.empty()) {</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <span class="comment">// Depth-first traversal of children to flatten all metrics, which is what was</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="comment">// expected by CM before we introduced metric groups.</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <a class="code" href="classimpala_1_1MetricGroup.html">MetricGroup</a>* group = groups.top();</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; groups.pop();</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; BOOST_FOREACH(<span class="keyword">const</span> ChildGroupMap::value_type&amp; child, group-&gt;<a class="code" href="classimpala_1_1MetricGroup.html#aad194acd31f35d6784f519d5cb0218ca">children_</a>) {</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; groups.push(child.second);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; }</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; BOOST_FOREACH(<span class="keyword">const</span> MetricMap::value_type&amp; m, group-&gt;<a class="code" href="classimpala_1_1MetricGroup.html#aeed58de43376fdb325782a2276ba9e63">metric_map_</a>) {</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; m.second-&gt;ToLegacyJson(document);</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; }</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; }</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;}</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;</div>
<div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="classimpala_1_1MetricGroup.html#a287ba0720c177cef37622f165da2a9a5"> 103</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classimpala_1_1MetricGroup.html#a287ba0720c177cef37622f165da2a9a5">MetricGroup::TemplateCallback</a>(<span class="keyword">const</span> <a class="code" href="classimpala_1_1Webserver.html#ac9f7aacffabb53e5c203ea7a3652802b">Webserver::ArgumentMap</a>&amp; args,</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; Document* document) {</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; Webserver::ArgumentMap::const_iterator metric_group = args.find(<span class="stringliteral">&quot;metric_group&quot;</span>);</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; lock_guard&lt;mutex&gt; l(<a class="code" href="classimpala_1_1MetricGroup.html#a74dcd8f2bee8f2500435dab191fac07d">lock_</a>);</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <span class="comment">// If no particular metric group is requested, render this metric group (and all its</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="comment">// children).</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <span class="keywordflow">if</span> (metric_group == args.end()) {</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; Value container;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; <a class="code" href="classimpala_1_1MetricGroup.html#a3dea7307b36552a69548034e2df420a9">ToJson</a>(<span class="keyword">true</span>, document, &amp;container);</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; document-&gt;AddMember(<span class="stringliteral">&quot;metric_group&quot;</span>, container, document-&gt;GetAllocator());</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; }</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; <span class="comment">// Search all metric groups to find the one we&#39;re looking for. In the future, we&#39;ll</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="comment">// change this to support path-based resolution of metric groups.</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; <a class="code" href="classimpala_1_1MetricGroup.html">MetricGroup</a>* found_group = NULL;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; stack&lt;MetricGroup*&gt; groups;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; groups.push(<span class="keyword">this</span>);</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keywordflow">while</span> (!groups.empty() &amp;&amp; found_group == NULL) {</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; <span class="comment">// Depth-first traversal of children to flatten all metrics, which is what was</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; <span class="comment">// expected by CM before we introduced metric groups.</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <a class="code" href="classimpala_1_1MetricGroup.html">MetricGroup</a>* group = groups.top();</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; groups.pop();</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; BOOST_FOREACH(<span class="keyword">const</span> ChildGroupMap::value_type&amp; child, group-&gt;<a class="code" href="classimpala_1_1MetricGroup.html#aad194acd31f35d6784f519d5cb0218ca">children_</a>) {</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="keywordflow">if</span> (child.first == metric_group-&gt;second) {</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; found_group = child.second;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; }</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; groups.push(child.second);</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; }</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; }</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keywordflow">if</span> (found_group != NULL) {</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; Value container;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; found_group-&gt;<a class="code" href="classimpala_1_1MetricGroup.html#a3dea7307b36552a69548034e2df420a9">ToJson</a>(<span class="keyword">false</span>, document, &amp;container);</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; document-&gt;AddMember(<span class="stringliteral">&quot;metric_group&quot;</span>, container, document-&gt;GetAllocator());</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; Value error(Substitute(<span class="stringliteral">&quot;Metric group $0 not found&quot;</span>, metric_group-&gt;second).c_str(),</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; document-&gt;GetAllocator());</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; document-&gt;AddMember(<span class="stringliteral">&quot;error&quot;</span>, error, document-&gt;GetAllocator());</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; }</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;}</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;</div>
<div class="line"><a name="l00145"></a><span class="lineno"><a class="line" href="classimpala_1_1MetricGroup.html#a3dea7307b36552a69548034e2df420a9"> 145</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classimpala_1_1MetricGroup.html#a3dea7307b36552a69548034e2df420a9">MetricGroup::ToJson</a>(<span class="keywordtype">bool</span> include_children, Document* document, Value* out_val) {</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; Value metric_list(kArrayType);</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; BOOST_FOREACH(<span class="keyword">const</span> MetricMap::value_type&amp; m, <a class="code" href="classimpala_1_1MetricGroup.html#aeed58de43376fdb325782a2276ba9e63">metric_map_</a>) {</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; Value metric_value;</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; m.second-&gt;ToJson(document, &amp;metric_value);</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; metric_list.PushBack(metric_value, document-&gt;GetAllocator());</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; }</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; Value container(kObjectType);</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; container.AddMember(<span class="stringliteral">&quot;metrics&quot;</span>, metric_list, document-&gt;GetAllocator());</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; container.AddMember(<span class="stringliteral">&quot;name&quot;</span>, <a class="code" href="classimpala_1_1MetricGroup.html#aee32ba1323157770c95bcf841f0e7c1d">name_</a>.c_str(), document-&gt;GetAllocator());</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; <span class="keywordflow">if</span> (include_children) {</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; Value child_groups(kArrayType);</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; BOOST_FOREACH(<span class="keyword">const</span> ChildGroupMap::value_type&amp; child, <a class="code" href="classimpala_1_1MetricGroup.html#aad194acd31f35d6784f519d5cb0218ca">children_</a>) {</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; Value child_value;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; child.second-&gt;ToJson(<span class="keyword">true</span>, document, &amp;child_value);</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; child_groups.PushBack(child_value, document-&gt;GetAllocator());</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; }</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; container.AddMember(<span class="stringliteral">&quot;child_groups&quot;</span>, child_groups, document-&gt;GetAllocator());</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; }</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160;</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; *out_val = container;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160;}</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160;</div>
<div class="line"><a name="l00169"></a><span class="lineno"><a class="line" href="classimpala_1_1MetricGroup.html#a06f304e28df3ce705703fe17f2c180bf"> 169</a></span>&#160;<a class="code" href="classimpala_1_1MetricGroup.html">MetricGroup</a>* <a class="code" href="classimpala_1_1MetricGroup.html#a06f304e28df3ce705703fe17f2c180bf">MetricGroup::GetChildGroup</a>(<span class="keyword">const</span> std::string&amp; <a class="code" href="namespaceimpala.html#aaebb9aadfa9e5aec064bc26565df06d3">name</a>) {</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; lock_guard&lt;mutex&gt; l(<a class="code" href="classimpala_1_1MetricGroup.html#a74dcd8f2bee8f2500435dab191fac07d">lock_</a>);</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; ChildGroupMap::iterator it = <a class="code" href="classimpala_1_1MetricGroup.html#aad194acd31f35d6784f519d5cb0218ca">children_</a>.find(name);</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; <span class="keywordflow">if</span> (it != <a class="code" href="classimpala_1_1MetricGroup.html#aad194acd31f35d6784f519d5cb0218ca">children_</a>.end()) <span class="keywordflow">return</span> it-&gt;second;</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <a class="code" href="classimpala_1_1MetricGroup.html">MetricGroup</a>* group = <a class="code" href="classimpala_1_1MetricGroup.html#a1b49e4e65d0d50ffc75ebc09e7cc451c">obj_pool_</a>-&gt;Add(<span class="keyword">new</span> <a class="code" href="classimpala_1_1MetricGroup.html">MetricGroup</a>(name));</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; <a class="code" href="classimpala_1_1MetricGroup.html#aad194acd31f35d6784f519d5cb0218ca">children_</a>[<a class="code" href="classimpala_1_1MetricGroup.html#ab502d1ff9aa79e3ceab1b86e4ba9f155">name</a>] = group;</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; <span class="keywordflow">return</span> group;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160;}</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160;</div>
<div class="line"><a name="l00178"></a><span class="lineno"><a class="line" href="classimpala_1_1MetricGroup.html#aff090ecbc7d7be655499bd02fde3e9b5"> 178</a></span>&#160;<span class="keywordtype">string</span> <a class="code" href="classimpala_1_1MetricGroup.html#aff090ecbc7d7be655499bd02fde3e9b5">MetricGroup::DebugString</a>() {</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; <a class="code" href="classimpala_1_1Webserver.html#ac9f7aacffabb53e5c203ea7a3652802b">Webserver::ArgumentMap</a> empty_map;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; Document document;</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; document.SetObject();</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; <a class="code" href="classimpala_1_1MetricGroup.html#a287ba0720c177cef37622f165da2a9a5">TemplateCallback</a>(empty_map, &amp;document);</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; <a class="code" href="classimpala_1_1StringBuffer.html">StringBuffer</a> strbuf;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; PrettyWriter&lt;StringBuffer&gt; writer(strbuf);</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; document.Accept(writer);</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; <span class="keywordflow">return</span> strbuf.GetString();</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160;}</div>
<div class="ttc" id="namespaceimpala_html_ab171f6fa40aed1dce51c6639818f22fe"><div class="ttname"><a href="namespaceimpala.html#ab171f6fa40aed1dce51c6639818f22fe">impala::ToJsonValue&lt; string &gt;</a></div><div class="ttdeci">void ToJsonValue&lt; string &gt;(const string &amp;value, const TUnit::type unit, Document *document, Value *out_val)</div><div class="ttdef"><b>Definition:</b> <a href="metrics_8cc_source.html#l00038">metrics.cc:38</a></div></div>
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<div class="ttc" id="classimpala_1_1MetricGroup_html"><div class="ttname"><a href="classimpala_1_1MetricGroup.html">impala::MetricGroup</a></div><div class="ttdoc">MetricGroups may be organised hierarchically as a tree. </div><div class="ttdef"><b>Definition:</b> <a href="metrics_8h_source.html#l00200">metrics.h:200</a></div></div>
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<div class="ttc" id="classimpala_1_1Status_html"><div class="ttname"><a href="classimpala_1_1Status.html">impala::Status</a></div><div class="ttdef"><b>Definition:</b> <a href="status_8h_source.html#l00081">status.h:81</a></div></div>
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<div class="ttc" id="classimpala_1_1MetricGroup_html_aff090ecbc7d7be655499bd02fde3e9b5"><div class="ttname"><a href="classimpala_1_1MetricGroup.html#aff090ecbc7d7be655499bd02fde3e9b5">impala::MetricGroup::DebugString</a></div><div class="ttdeci">std::string DebugString()</div><div class="ttdoc">Useful for debuggers, returns the output of CMCompatibleCallback(). </div><div class="ttdef"><b>Definition:</b> <a href="metrics_8cc_source.html#l00178">metrics.cc:178</a></div></div>
<div class="ttc" id="classimpala_1_1MetricGroup_html_a287ba0720c177cef37622f165da2a9a5"><div class="ttname"><a href="classimpala_1_1MetricGroup.html#a287ba0720c177cef37622f165da2a9a5">impala::MetricGroup::TemplateCallback</a></div><div class="ttdeci">void TemplateCallback(const Webserver::ArgumentMap &amp;args, rapidjson::Document *document)</div><div class="ttdef"><b>Definition:</b> <a href="metrics_8cc_source.html#l00103">metrics.cc:103</a></div></div>
<div class="ttc" id="classimpala_1_1MetricGroup_html_aee32ba1323157770c95bcf841f0e7c1d"><div class="ttname"><a href="classimpala_1_1MetricGroup.html#aee32ba1323157770c95bcf841f0e7c1d">impala::MetricGroup::name_</a></div><div class="ttdeci">std::string name_</div><div class="ttdoc">Name of this metric group. </div><div class="ttdef"><b>Definition:</b> <a href="metrics_8h_source.html#l00290">metrics.h:290</a></div></div>
<div class="ttc" id="classimpala_1_1MetricGroup_html_aeed58de43376fdb325782a2276ba9e63"><div class="ttname"><a href="classimpala_1_1MetricGroup.html#aeed58de43376fdb325782a2276ba9e63">impala::MetricGroup::metric_map_</a></div><div class="ttdeci">MetricMap metric_map_</div><div class="ttdef"><b>Definition:</b> <a href="metrics_8h_source.html#l00297">metrics.h:297</a></div></div>
<div class="ttc" id="classimpala_1_1MetricGroup_html_a3dea7307b36552a69548034e2df420a9"><div class="ttname"><a href="classimpala_1_1MetricGroup.html#a3dea7307b36552a69548034e2df420a9">impala::MetricGroup::ToJson</a></div><div class="ttdeci">void ToJson(bool include_children, rapidjson::Document *document, rapidjson::Value *out_val)</div><div class="ttdoc">Converts this metric group (and optionally all of its children recursively) to JSON. </div><div class="ttdef"><b>Definition:</b> <a href="metrics_8cc_source.html#l00145">metrics.cc:145</a></div></div>
<div class="ttc" id="classimpala_1_1MetricGroup_html_aad194acd31f35d6784f519d5cb0218ca"><div class="ttname"><a href="classimpala_1_1MetricGroup.html#aad194acd31f35d6784f519d5cb0218ca">impala::MetricGroup::children_</a></div><div class="ttdeci">ChildGroupMap children_</div><div class="ttdef"><b>Definition:</b> <a href="metrics_8h_source.html#l00301">metrics.h:301</a></div></div>
<div class="ttc" id="classimpala_1_1MetricGroup_html_ace59b4785d81836d904c266087db13ef"><div class="ttname"><a href="classimpala_1_1MetricGroup.html#ace59b4785d81836d904c266087db13ef">impala::MetricGroup::CMCompatibleCallback</a></div><div class="ttdeci">void CMCompatibleCallback(const Webserver::ArgumentMap &amp;args, rapidjson::Document *document)</div><div class="ttdef"><b>Definition:</b> <a href="metrics_8cc_source.html#l00073">metrics.cc:73</a></div></div>
<div class="ttc" id="classimpala_1_1Status_html_a580565665ea944eb64f3f495b1bee1e0"><div class="ttname"><a href="classimpala_1_1Status.html#a580565665ea944eb64f3f495b1bee1e0">impala::Status::OK</a></div><div class="ttdeci">static const Status OK</div><div class="ttdef"><b>Definition:</b> <a href="status_8h_source.html#l00087">status.h:87</a></div></div>
<div class="ttc" id="names_8h_html"><div class="ttname"><a href="names_8h.html">names.h</a></div></div>
<div class="ttc" id="classimpala_1_1Webserver_html"><div class="ttname"><a href="classimpala_1_1Webserver.html">impala::Webserver</a></div><div class="ttdef"><b>Definition:</b> <a href="webserver_8h_source.html#l00034">webserver.h:34</a></div></div>
<div class="ttc" id="classimpala_1_1MetricGroup_html_a74dcd8f2bee8f2500435dab191fac07d"><div class="ttname"><a href="classimpala_1_1MetricGroup.html#a74dcd8f2bee8f2500435dab191fac07d">impala::MetricGroup::lock_</a></div><div class="ttdeci">boost::mutex lock_</div><div class="ttdoc">Guards metric_map_ and children_. </div><div class="ttdef"><b>Definition:</b> <a href="metrics_8h_source.html#l00293">metrics.h:293</a></div></div>
<div class="ttc" id="namespaceimpala_html_aaebb9aadfa9e5aec064bc26565df06d3"><div class="ttname"><a href="namespaceimpala.html#aaebb9aadfa9e5aec064bc26565df06d3">impala::name</a></div><div class="ttdeci">string name</div><div class="ttdef"><b>Definition:</b> <a href="cpu-info_8cc_source.html#l00050">cpu-info.cc:50</a></div></div>
<div class="ttc" id="metrics_8h_html"><div class="ttname"><a href="metrics_8h.html">metrics.h</a></div></div>
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