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| <p><code>#include <<a class="el" href="hdfs-fs-cache_8h_source.html">hdfs-fs-cache.h</a>></code></p> |
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| Public Types</h2></td></tr> |
| <tr class="memitem:ab8cd39a3e94d24aab4599df223a5c313"><td class="memItemLeft" align="right" valign="top">typedef boost::unordered_map<br class="typebreak"/> |
| < std::string, hdfsFS > </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#ab8cd39a3e94d24aab4599df223a5c313">HdfsFsMap</a></td></tr> |
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| </table><table class="memberdecls"> |
| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a> |
| Public Member Functions</h2></td></tr> |
| <tr class="memitem:a99ee21c26efb9d824b6f7d0363d83bf0"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classimpala_1_1Status.html">Status</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#a99ee21c26efb9d824b6f7d0363d83bf0">GetLocalConnection</a> (hdfsFS *fs)</td></tr> |
| <tr class="memdesc:a99ee21c26efb9d824b6f7d0363d83bf0"><td class="mdescLeft"> </td><td class="mdescRight">Get connection to the local filesystem. <a href="#a99ee21c26efb9d824b6f7d0363d83bf0">More...</a><br/></td></tr> |
| <tr class="separator:a99ee21c26efb9d824b6f7d0363d83bf0"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a51d1e4eb6eeb4cc3a0b30ebf55c690a9"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classimpala_1_1Status.html">Status</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#a51d1e4eb6eeb4cc3a0b30ebf55c690a9">GetConnection</a> (const std::string &<a class="el" href="sasl-test_8cc.html#a2db66f7b463c0e190f8933e51f43d91e">path</a>, hdfsFS *fs, <a class="el" href="classimpala_1_1HdfsFsCache.html#ab8cd39a3e94d24aab4599df223a5c313">HdfsFsMap</a> *local_cache=NULL)</td></tr> |
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| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a> |
| Static Public Member Functions</h2></td></tr> |
| <tr class="memitem:af7b18daf8c4da6bfce2c7612a515bf64"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="classimpala_1_1HdfsFsCache.html">HdfsFsCache</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#af7b18daf8c4da6bfce2c7612a515bf64">instance</a> ()</td></tr> |
| <tr class="separator:af7b18daf8c4da6bfce2c7612a515bf64"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a3e1eb21b31b3cfbaa5e94e3ceeac5152"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#a3e1eb21b31b3cfbaa5e94e3ceeac5152">Init</a> ()</td></tr> |
| <tr class="memdesc:a3e1eb21b31b3cfbaa5e94e3ceeac5152"><td class="mdescLeft"> </td><td class="mdescRight">Initializes the cache. Must be called before any other APIs. <a href="#a3e1eb21b31b3cfbaa5e94e3ceeac5152">More...</a><br/></td></tr> |
| <tr class="separator:a3e1eb21b31b3cfbaa5e94e3ceeac5152"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:ac7173ea32287dcfaf2b0fd196ce2b08b"><td class="memItemLeft" align="right" valign="top">static string </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#ac7173ea32287dcfaf2b0fd196ce2b08b">GetNameNodeFromPath</a> (const string &<a class="el" href="sasl-test_8cc.html#a2db66f7b463c0e190f8933e51f43d91e">path</a>, string *err)</td></tr> |
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| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-methods"></a> |
| Private Member Functions</h2></td></tr> |
| <tr class="memitem:a12cb53e1819c2ad7b8a7a0a08e81be08"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#a12cb53e1819c2ad7b8a7a0a08e81be08">HdfsFsCache</a> ()</td></tr> |
| <tr class="separator:a12cb53e1819c2ad7b8a7a0a08e81be08"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a736a18f895634e61b7d1dac6ca64cc0e"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#a736a18f895634e61b7d1dac6ca64cc0e">HdfsFsCache</a> (<a class="el" href="classimpala_1_1HdfsFsCache.html">HdfsFsCache</a> const &l)</td></tr> |
| <tr class="separator:a736a18f895634e61b7d1dac6ca64cc0e"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:aa385cb86d6df547aa62f335cae1ce0a4"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classimpala_1_1HdfsFsCache.html">HdfsFsCache</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#aa385cb86d6df547aa62f335cae1ce0a4">operator=</a> (<a class="el" href="classimpala_1_1HdfsFsCache.html">HdfsFsCache</a> const &l)</td></tr> |
| <tr class="separator:aa385cb86d6df547aa62f335cae1ce0a4"><td class="memSeparator" colspan="2"> </td></tr> |
| </table><table class="memberdecls"> |
| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-attribs"></a> |
| Private Attributes</h2></td></tr> |
| <tr class="memitem:a1414b6c1288bb61278d5ec24491b8437"><td class="memItemLeft" align="right" valign="top">boost::mutex </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#a1414b6c1288bb61278d5ec24491b8437">lock_</a></td></tr> |
| <tr class="separator:a1414b6c1288bb61278d5ec24491b8437"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a4297eb1b13be517b6d59f51c71e12115"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classimpala_1_1HdfsFsCache.html#ab8cd39a3e94d24aab4599df223a5c313">HdfsFsMap</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#a4297eb1b13be517b6d59f51c71e12115">fs_map_</a></td></tr> |
| <tr class="separator:a4297eb1b13be517b6d59f51c71e12115"><td class="memSeparator" colspan="2"> </td></tr> |
| </table><table class="memberdecls"> |
| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-static-attribs"></a> |
| Static Private Attributes</h2></td></tr> |
| <tr class="memitem:abc72e9f32db5c918494d9bde77677cf2"><td class="memItemLeft" align="right" valign="top">static boost::scoped_ptr<br class="typebreak"/> |
| < <a class="el" href="classimpala_1_1HdfsFsCache.html">HdfsFsCache</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1HdfsFsCache.html#abc72e9f32db5c918494d9bde77677cf2">instance_</a></td></tr> |
| <tr class="memdesc:abc72e9f32db5c918494d9bde77677cf2"><td class="mdescLeft"> </td><td class="mdescRight">Singleton instance. Instantiated in <a class="el" href="classimpala_1_1HdfsFsCache.html#a3e1eb21b31b3cfbaa5e94e3ceeac5152" title="Initializes the cache. Must be called before any other APIs. ">Init()</a>. <a href="#abc72e9f32db5c918494d9bde77677cf2">More...</a><br/></td></tr> |
| <tr class="separator:abc72e9f32db5c918494d9bde77677cf2"><td class="memSeparator" colspan="2"> </td></tr> |
| </table> |
| <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> |
| <div class="textblock"><p>A (process-wide) cache of hdfsFS objects. These connections are shared across all threads and kept open until the process terminates. These connections are leaked, i.e. we never call hdfsDisconnect(). Calls to hdfsDisconnect() by individual threads would terminate all other connections handed out via hdfsConnect() to the same URI, and there is no simple, safe way to call hdfsDisconnect() when process terminates (the proper solution is likely to create a signal handler to detect when the process is killed, but we would still leak when impalad crashes). </p> |
| |
| <p>Definition at line <a class="el" href="hdfs-fs-cache_8h_source.html#l00039">39</a> of file <a class="el" href="hdfs-fs-cache_8h_source.html">hdfs-fs-cache.h</a>.</p> |
| </div><h2 class="groupheader">Member Typedef Documentation</h2> |
| <a class="anchor" id="ab8cd39a3e94d24aab4599df223a5c313"></a> |
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| <td class="memname">typedef boost::unordered_map<std::string, hdfsFS> <a class="el" href="classimpala_1_1HdfsFsCache.html#ab8cd39a3e94d24aab4599df223a5c313">impala::HdfsFsCache::HdfsFsMap</a></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="hdfs-fs-cache_8h_source.html#l00041">41</a> of file <a class="el" href="hdfs-fs-cache_8h_source.html">hdfs-fs-cache.h</a>.</p> |
| |
| </div> |
| </div> |
| <h2 class="groupheader">Constructor & Destructor Documentation</h2> |
| <a class="anchor" id="a12cb53e1819c2ad7b8a7a0a08e81be08"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
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| <tr> |
| <td class="mlabels-left"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">impala::HdfsFsCache::HdfsFsCache </td> |
| <td>(</td> |
| <td class="paramname"></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </td> |
| <td class="mlabels-right"> |
| <span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">private</span></span> </td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="hdfs-fs-cache_8h_source.html#l00069">69</a> of file <a class="el" href="hdfs-fs-cache_8h_source.html">hdfs-fs-cache.h</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="a736a18f895634e61b7d1dac6ca64cc0e"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
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| <tr> |
| <td class="mlabels-left"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">impala::HdfsFsCache::HdfsFsCache </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala_1_1HdfsFsCache.html">HdfsFsCache</a> const & </td> |
| <td class="paramname"><em>l</em></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </td> |
| <td class="mlabels-right"> |
| <span class="mlabels"><span class="mlabel">private</span></span> </td> |
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| </div><div class="memdoc"> |
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| </div> |
| </div> |
| <h2 class="groupheader">Member Function Documentation</h2> |
| <a class="anchor" id="a51d1e4eb6eeb4cc3a0b30ebf55c690a9"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
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| <tr> |
| <td class="memname"><a class="el" href="classimpala_1_1Status.html">Status</a> impala::HdfsFsCache::GetConnection </td> |
| <td>(</td> |
| <td class="paramtype">const std::string & </td> |
| <td class="paramname"><em>path</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">hdfsFS * </td> |
| <td class="paramname"><em>fs</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="classimpala_1_1HdfsFsCache.html#ab8cd39a3e94d24aab4599df223a5c313">HdfsFsMap</a> * </td> |
| <td class="paramname"><em>local_cache</em> = <code>NULL</code> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <p>Get connection to specific fs by specifying a path. Optionally, a local cache can be provided so that the process-wide lock can be avoided on subsequent calls for the same filesystem. The caller is responsible for synchronizing the local cache (e.g. by passing a thread-local cache). </p> |
| |
| <p>Definition at line <a class="el" href="hdfs-fs-cache_8cc_source.html#l00039">39</a> of file <a class="el" href="hdfs-fs-cache_8cc_source.html">hdfs-fs-cache.cc</a>.</p> |
| |
| <p>References <a class="el" href="hdfs-util_8cc_source.html#l00026">impala::GetHdfsErrorMsg()</a>, <a class="el" href="lock-benchmark_8cc_source.html#l00072">lock_</a>, and <a class="el" href="webserver_8cc_source.html#l00115">impala::OK</a>.</p> |
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| </div> |
| <a class="anchor" id="a99ee21c26efb9d824b6f7d0363d83bf0"></a> |
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| <tr> |
| <td class="memname"><a class="el" href="classimpala_1_1Status.html">Status</a> impala::HdfsFsCache::GetLocalConnection </td> |
| <td>(</td> |
| <td class="paramtype">hdfsFS * </td> |
| <td class="paramname"><em>fs</em></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Get connection to the local filesystem. </p> |
| |
| <p>Definition at line <a class="el" href="hdfs-fs-cache_8cc_source.html#l00078">78</a> of file <a class="el" href="hdfs-fs-cache_8cc_source.html">hdfs-fs-cache.cc</a>.</p> |
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| <td class="memname">string impala::HdfsFsCache::GetNameNodeFromPath </td> |
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| <td class="paramtype">const string & </td> |
| <td class="paramname"><em>path</em>, </td> |
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| <td class="paramtype">string * </td> |
| <td class="paramname"><em>err</em> </td> |
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| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
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| <p>Get NameNode info from path, set error message if path is not valid. Exposed as a static method for testing purpose. </p> |
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| <p>Definition at line <a class="el" href="hdfs-fs-cache_8cc_source.html#l00082">82</a> of file <a class="el" href="hdfs-fs-cache_8cc_source.html">hdfs-fs-cache.cc</a>.</p> |
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| <td class="memname">void impala::HdfsFsCache::Init </td> |
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| <p>Initializes the cache. Must be called before any other APIs. </p> |
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| <p>Definition at line <a class="el" href="hdfs-fs-cache_8cc_source.html#l00034">34</a> of file <a class="el" href="hdfs-fs-cache_8cc_source.html">hdfs-fs-cache.cc</a>.</p> |
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| <p>Referenced by <a class="el" href="init_8cc_source.html#l00122">impala::InitCommonRuntime()</a>.</p> |
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| <td class="memname">static <a class="el" href="classimpala_1_1HdfsFsCache.html">HdfsFsCache</a>* impala::HdfsFsCache::instance </td> |
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| <td class="paramname"></td><td>)</td> |
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| <td class="mlabels-right"> |
| <span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td> |
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| <p>Definition at line <a class="el" href="hdfs-fs-cache_8h_source.html#l00043">43</a> of file <a class="el" href="hdfs-fs-cache_8h_source.html">hdfs-fs-cache.h</a>.</p> |
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| <p>References <a class="el" href="hdfs-fs-cache_8h_source.html#l00064">instance_</a>.</p> |
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| <p>Referenced by <a class="el" href="hdfs-scan-node_8cc_source.html#l00304">impala::HdfsScanNode::Prepare()</a>, and <a class="el" href="hdfs-table-sink_8cc_source.html#l00107">impala::HdfsTableSink::Prepare()</a>.</p> |
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| <td class="memname"><a class="el" href="classimpala_1_1HdfsFsCache.html">HdfsFsCache</a>& impala::HdfsFsCache::operator= </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala_1_1HdfsFsCache.html">HdfsFsCache</a> const & </td> |
| <td class="paramname"><em>l</em></td><td>)</td> |
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| <h2 class="groupheader">Member Data Documentation</h2> |
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| <td class="memname"><a class="el" href="classimpala_1_1HdfsFsCache.html#ab8cd39a3e94d24aab4599df223a5c313">HdfsFsMap</a> impala::HdfsFsCache::fs_map_</td> |
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| <span class="mlabels"><span class="mlabel">private</span></span> </td> |
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| <p>Definition at line <a class="el" href="hdfs-fs-cache_8h_source.html#l00067">67</a> of file <a class="el" href="hdfs-fs-cache_8h_source.html">hdfs-fs-cache.h</a>.</p> |
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| <td class="memname">scoped_ptr< <a class="el" href="classimpala_1_1HdfsFsCache.html">HdfsFsCache</a> > impala::HdfsFsCache::instance_</td> |
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| </td> |
| <td class="mlabels-right"> |
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| <p>Singleton instance. Instantiated in <a class="el" href="classimpala_1_1HdfsFsCache.html#a3e1eb21b31b3cfbaa5e94e3ceeac5152" title="Initializes the cache. Must be called before any other APIs. ">Init()</a>. </p> |
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| <p>Definition at line <a class="el" href="hdfs-fs-cache_8h_source.html#l00064">64</a> of file <a class="el" href="hdfs-fs-cache_8h_source.html">hdfs-fs-cache.h</a>.</p> |
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| <p>Referenced by <a class="el" href="hdfs-fs-cache_8h_source.html#l00043">instance()</a>.</p> |
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| <td class="memname">boost::mutex impala::HdfsFsCache::lock_</td> |
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| <span class="mlabels"><span class="mlabel">private</span></span> </td> |
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| <p>Definition at line <a class="el" href="hdfs-fs-cache_8h_source.html#l00066">66</a> of file <a class="el" href="hdfs-fs-cache_8h_source.html">hdfs-fs-cache.h</a>.</p> |
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| </div> |
| </div> |
| <hr/>The documentation for this class was generated from the following files:<ul> |
| <li>be/src/runtime/<a class="el" href="hdfs-fs-cache_8h_source.html">hdfs-fs-cache.h</a></li> |
| <li>be/src/runtime/<a class="el" href="hdfs-fs-cache_8cc_source.html">hdfs-fs-cache.cc</a></li> |
| </ul> |
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| <li class="footer">Generated on Thu May 7 2015 16:10:49 for Impala by |
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