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| <h2 title="Class ClusterNodesResource" class="title">Class ClusterNodesResource</h2> |
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| <pre>public class <span class="typeNameLabel">ClusterNodesResource</span> |
| extends java.lang.Object</pre> |
| <div class="block">Class enhances the API of the HBASE rest server. |
| Example for querying API getClusterNodesInfo from a web client |
| <code>curl "http://localhost:51200/pxf/{version}/HadoopCluster/getNodesInfo"</code> |
| /pxf/ is made part of the path when there is a webapp by that name in tcServer.</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hawq/pxf/service/rest/ClusterNodesResource.html#ClusterNodesResource--">ClusterNodesResource</a></span>()</code> </td> |
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| <td class="colFirst"><code>javax.ws.rs.core.Response</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hawq/pxf/service/rest/ClusterNodesResource.html#read--">read</a></span>()</code> |
| <div class="block">Function queries the Hadoop namenode with the getDataNodeStats API It |
| gets the host's IP and REST port of every HDFS data node in the cluster.</div> |
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| <pre>public ClusterNodesResource()</pre> |
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| <pre>public javax.ws.rs.core.Response read() |
| throws java.lang.Exception</pre> |
| <div class="block">Function queries the Hadoop namenode with the getDataNodeStats API It |
| gets the host's IP and REST port of every HDFS data node in the cluster. |
| Then, it packs the results in JSON format and writes to the HTTP response |
| stream. Response Examples:<br> |
| <ol> |
| <li>When there are no datanodes - getDataNodeStats returns an empty array |
| <code>{"regions":[]}</code></li> |
| <li>When there are datanodes |
| <code>{"regions":[{"host":"1.2.3.1","port":50075},{"host":"1.2.3.2","port" |
| :50075}]}</code></li> |
| </ol></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>JSON response with nodes info</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>java.lang.Exception</code> - if failed to retrieve info</dd> |
| </dl> |
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