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| <div class="subTitle">org.apache.storm.scheduler.resource.strategies.scheduling</div> |
| <h2 title="Class ConstraintSolverStrategy" class="title">Class ConstraintSolverStrategy</h2> |
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| <li><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">org.apache.storm.scheduler.resource.strategies.scheduling.BaseResourceAwareStrategy</a></li> |
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| <li>org.apache.storm.scheduler.resource.strategies.scheduling.ConstraintSolverStrategy</li> |
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| <pre>public class <span class="typeNameLabel">ConstraintSolverStrategy</span> |
| extends <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></pre> |
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| <h3>Nested classes/interfaces inherited from class org.apache.storm.scheduler.resource.strategies.scheduling.<a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></h3> |
| <code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.NodeSortType.html" title="enum in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy.NodeSortType</a></code></li> |
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| <h3>Fields inherited from class org.apache.storm.scheduler.resource.strategies.scheduling.<a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></h3> |
| <code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#cluster">cluster</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#compToExecs">compToExecs</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#config">config</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#execSorter">execSorter</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#execToComp">execToComp</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#nodes">nodes</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#nodeSorter">nodeSorter</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#nodeSortType">nodeSortType</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#orderExecutorsByProximity">orderExecutorsByProximity</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#searcherState">searcherState</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#sortNodesForEachExecutor">sortNodesForEachExecutor</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#topologyDetails">topologyDetails</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#topoName">topoName</a></code></li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/ConstraintSolverStrategy.html#ConstraintSolverStrategy--">ConstraintSolverStrategy</a></span>()</code> </td> |
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| <td class="colFirst"><code>protected <a href="../../../../../../../org/apache/storm/scheduler/resource/SchedulingResult.html" title="class in org.apache.storm.scheduler.resource">SchedulingResult</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/ConstraintSolverStrategy.html#checkSchedulingFeasibility--">checkSchedulingFeasibility</a></span>()</code> |
| <div class="block">Check scheduling feasibility for a quick failure as the second step in <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#schedule-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-"><code>BaseResourceAwareStrategy.schedule(Cluster, TopologyDetails)</code></a>.</div> |
| </td> |
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| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/ConstraintSolverStrategy.html#isExecAssignmentToWorkerValid-org.apache.storm.scheduler.ExecutorDetails-org.apache.storm.scheduler.WorkerSlot-">isExecAssignmentToWorkerValid</a></span>(<a href="../../../../../../../org/apache/storm/scheduler/ExecutorDetails.html" title="class in org.apache.storm.scheduler">ExecutorDetails</a> exec, |
| <a href="../../../../../../../org/apache/storm/scheduler/WorkerSlot.html" title="class in org.apache.storm.scheduler">WorkerSlot</a> worker)</code> |
| <div class="block">Check if any constraints are violated if exec is scheduled on worker.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/ConstraintSolverStrategy.html#prepareForScheduling-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-">prepareForScheduling</a></span>(<a href="../../../../../../../org/apache/storm/scheduler/Cluster.html" title="class in org.apache.storm.scheduler">Cluster</a> cluster, |
| <a href="../../../../../../../org/apache/storm/scheduler/TopologyDetails.html" title="class in org.apache.storm.scheduler">TopologyDetails</a> topologyDetails)</code> |
| <div class="block">Initialize instance variables as the first step in <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#schedule-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-"><code>BaseResourceAwareStrategy.schedule(Cluster, TopologyDetails)</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/ConstraintSolverStrategy.html#validateSolution-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-">validateSolution</a></span>(<a href="../../../../../../../org/apache/storm/scheduler/Cluster.html" title="class in org.apache.storm.scheduler">Cluster</a> cluster, |
| <a href="../../../../../../../org/apache/storm/scheduler/TopologyDetails.html" title="class in org.apache.storm.scheduler">TopologyDetails</a> topo)</code> |
| <div class="block">Determines if a scheduling is valid and all constraints are satisfied (for use in testing).</div> |
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| <h3>Methods inherited from class org.apache.storm.scheduler.resource.strategies.scheduling.<a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></h3> |
| <code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#getMaxStateSearchFromTopoConf-java.util.Map-">getMaxStateSearchFromTopoConf</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#hostnameToNodes-java.lang.String-">hostnameToNodes</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#idToNode-java.lang.String-">idToNode</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#isOrderByProximity-java.util.Map-">isOrderByProximity</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#prepare-java.util.Map-">prepare</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#schedule-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-">schedule</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#scheduleExecutorsOnNodes-java.util.List-java.lang.Iterable-">scheduleExecutorsOnNodes</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#setExecSorter-org.apache.storm.scheduler.resource.strategies.scheduling.sorter.IExecSorter-">setExecSorter</a>, <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#setNodeSorter-org.apache.storm.scheduler.resource.strategies.scheduling.sorter.INodeSorter-">setNodeSorter</a></code></li> |
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| <h3>Constructor Detail</h3> |
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| <h4>ConstraintSolverStrategy</h4> |
| <pre>public ConstraintSolverStrategy()</pre> |
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| <h3>Method Detail</h3> |
| <a name="prepareForScheduling-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-"> |
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| <h4>prepareForScheduling</h4> |
| <pre>protected void prepareForScheduling(<a href="../../../../../../../org/apache/storm/scheduler/Cluster.html" title="class in org.apache.storm.scheduler">Cluster</a> cluster, |
| <a href="../../../../../../../org/apache/storm/scheduler/TopologyDetails.html" title="class in org.apache.storm.scheduler">TopologyDetails</a> topologyDetails)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#prepareForScheduling-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-">BaseResourceAwareStrategy</a></code></span></div> |
| <div class="block"><p>Initialize instance variables as the first step in <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#schedule-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-"><code>BaseResourceAwareStrategy.schedule(Cluster, TopologyDetails)</code></a>. This method may be extended by subclasses to initialize additional variables as in <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/ConstraintSolverStrategy.html#prepareForScheduling-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-"><code>prepareForScheduling(Cluster, TopologyDetails)</code></a>.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#prepareForScheduling-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-">prepareForScheduling</a></code> in class <code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>cluster</code> - on which executors will be scheduled.</dd> |
| <dd><code>topologyDetails</code> - to be scheduled.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="checkSchedulingFeasibility--"> |
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| <h4>checkSchedulingFeasibility</h4> |
| <pre>protected <a href="../../../../../../../org/apache/storm/scheduler/resource/SchedulingResult.html" title="class in org.apache.storm.scheduler.resource">SchedulingResult</a> checkSchedulingFeasibility()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#checkSchedulingFeasibility--">BaseResourceAwareStrategy</a></code></span></div> |
| <div class="block"><p>Check scheduling feasibility for a quick failure as the second step in <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#schedule-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-"><code>BaseResourceAwareStrategy.schedule(Cluster, TopologyDetails)</code></a>. If scheduling is not possible, then return a SchedulingStatus object with a failure status. If fully scheduled then return a successful SchedulingStatus. This method can be extended by subclasses <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/ConstraintSolverStrategy.html#checkSchedulingFeasibility--"><code>checkSchedulingFeasibility()</code></a> to check for additional failure conditions.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#checkSchedulingFeasibility--">checkSchedulingFeasibility</a></code> in class <code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>A non-null <a href="../../../../../../../org/apache/storm/scheduler/resource/SchedulingResult.html" title="class in org.apache.storm.scheduler.resource"><code>SchedulingResult</code></a> to terminate scheduling, otherwise return null to continue scheduling.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isExecAssignmentToWorkerValid-org.apache.storm.scheduler.ExecutorDetails-org.apache.storm.scheduler.WorkerSlot-"> |
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| <h4>isExecAssignmentToWorkerValid</h4> |
| <pre>protected boolean isExecAssignmentToWorkerValid(<a href="../../../../../../../org/apache/storm/scheduler/ExecutorDetails.html" title="class in org.apache.storm.scheduler">ExecutorDetails</a> exec, |
| <a href="../../../../../../../org/apache/storm/scheduler/WorkerSlot.html" title="class in org.apache.storm.scheduler">WorkerSlot</a> worker)</pre> |
| <div class="block"><p>Check if any constraints are violated if exec is scheduled on worker.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html#isExecAssignmentToWorkerValid-org.apache.storm.scheduler.ExecutorDetails-org.apache.storm.scheduler.WorkerSlot-">isExecAssignmentToWorkerValid</a></code> in class <code><a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>exec</code> - being scheduled.</dd> |
| <dd><code>worker</code> - on which to schedule.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if scheduling exec on worker does not violate any constraints, returns false if it does</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="validateSolution-org.apache.storm.scheduler.Cluster-org.apache.storm.scheduler.TopologyDetails-"> |
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| <h4>validateSolution</h4> |
| <pre>public static boolean validateSolution(<a href="../../../../../../../org/apache/storm/scheduler/Cluster.html" title="class in org.apache.storm.scheduler">Cluster</a> cluster, |
| <a href="../../../../../../../org/apache/storm/scheduler/TopologyDetails.html" title="class in org.apache.storm.scheduler">TopologyDetails</a> topo)</pre> |
| <div class="block"><p>Determines if a scheduling is valid and all constraints are satisfied (for use in testing). This is done in three steps.</p> |
| <li>Check if nodeCoLocationCnt-constraints are satisfied. Some components may allow only a certain number of |
| executors to exist on the same node <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/ConstraintSolverConfig.html#getMaxNodeCoLocationCnts--"><code>ConstraintSolverConfig.getMaxNodeCoLocationCnts()</code></a>. |
| </li> |
| <li> |
| Check if incompatibility-constraints are satisfied. Incompatible components |
| <a href="../../../../../../../org/apache/storm/scheduler/resource/strategies/scheduling/ConstraintSolverConfig.html#getIncompatibleComponentSets--"><code>ConstraintSolverConfig.getIncompatibleComponentSets()</code></a> should not be put on the same worker. |
| </li> |
| <li> |
| Check if CPU and Memory resources do not exceed availability on the node and total matches what is expected |
| when fully scheduled. |
| </li></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>cluster</code> - on which scheduling was done.</dd> |
| <dd><code>topo</code> - TopologyDetails being scheduled.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if solution is valid, false otherwise.</dd> |
| </dl> |
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