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| <div class="subTitle">org.apache.hadoop.yarn.server.sharedcachemanager</div> |
| <h2 title="Class AppChecker" class="title">Class AppChecker</h2> |
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| <li>org.apache.hadoop.service.AbstractService</li> |
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| <dd><a href="../../../../../../org/apache/hadoop/yarn/server/sharedcachemanager/RemoteAppChecker.html" title="class in org.apache.hadoop.yarn.server.sharedcachemanager">RemoteAppChecker</a></dd> |
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| <pre>@InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public abstract class <span class="typeNameLabel">AppChecker</span> |
| extends org.apache.hadoop.service.CompositeService</pre> |
| <div class="block">An interface for checking whether an app is running so that the cleaner |
| service may determine if it can safely remove a cached entry.</div> |
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| <code>STOP_ONLY_STARTED_SERVICES</code></li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/sharedcachemanager/AppChecker.html#AppChecker--">AppChecker</a></span>()</code> </td> |
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| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/sharedcachemanager/AppChecker.html#AppChecker-java.lang.String-">AppChecker</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</code> </td> |
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| <td class="colFirst"><code>abstract <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><org.apache.hadoop.yarn.api.records.ApplicationId></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/sharedcachemanager/AppChecker.html#getActiveApplications--">getActiveApplications</a></span>()</code> |
| <div class="block">Returns the list of all active apps at the given time.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>abstract boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/sharedcachemanager/AppChecker.html#isApplicationActive-org.apache.hadoop.yarn.api.records.ApplicationId-">isApplicationActive</a></span>(org.apache.hadoop.yarn.api.records.ApplicationId id)</code> |
| <div class="block">Returns whether the app is in an active state.</div> |
| </td> |
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| <h3>Methods inherited from class org.apache.hadoop.service.CompositeService</h3> |
| <code>addIfService, addService, getServices, removeService, serviceInit, serviceStart, serviceStop</code></li> |
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| <h3>Methods inherited from class org.apache.hadoop.service.AbstractService</h3> |
| <code>close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop</code></li> |
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| <h3>Constructor Detail</h3> |
| <a name="AppChecker--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>AppChecker</h4> |
| <pre>public AppChecker()</pre> |
| </li> |
| </ul> |
| <a name="AppChecker-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>AppChecker</h4> |
| <pre>public AppChecker(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</pre> |
| </li> |
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| <h4>isApplicationActive</h4> |
| <pre>@InterfaceAudience.Private |
| public abstract boolean isApplicationActive(org.apache.hadoop.yarn.api.records.ApplicationId id) |
| throws org.apache.hadoop.yarn.exceptions.YarnException</pre> |
| <div class="block">Returns whether the app is in an active state.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the app is found and is not in one of the completed states; |
| false otherwise</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.hadoop.yarn.exceptions.YarnException</code> - if there is an error in determining the app state</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getActiveApplications--"> |
| <!-- --> |
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| <h4>getActiveApplications</h4> |
| <pre>@InterfaceAudience.Private |
| public abstract <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><org.apache.hadoop.yarn.api.records.ApplicationId> getActiveApplications() |
| throws org.apache.hadoop.yarn.exceptions.YarnException</pre> |
| <div class="block">Returns the list of all active apps at the given time.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the list of active apps, or an empty list if there is none</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.hadoop.yarn.exceptions.YarnException</code> - if there is an error in obtaining the list</dd> |
| </dl> |
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