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| <li>Summary: </li> |
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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.storm.scheduler.resource.strategies.scheduling</a></div> |
| <h1 title="Class ConstraintSolverStrategy" class="title">Class ConstraintSolverStrategy</h1> |
| </div> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a> |
| <div class="inheritance"><a href="BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">org.apache.storm.scheduler.resource.strategies.scheduling.BaseResourceAwareStrategy</a> |
| <div class="inheritance">org.apache.storm.scheduler.resource.strategies.scheduling.ConstraintSolverStrategy</div> |
| </div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="IStrategy.html" title="interface in org.apache.storm.scheduler.resource.strategies.scheduling">IStrategy</a></code></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">ConstraintSolverStrategy</span> |
| <span class="extends-implements">extends <a href="BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></span></div> |
| </section> |
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| <h2>Nested Class Summary</h2> |
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| <h2 id="nested-classes-inherited-from-class-org.apache.storm.scheduler.resource.strategies.scheduling.BaseResourceAwareStrategy">Nested classes/interfaces inherited from class org.apache.storm.scheduler.resource.strategies.scheduling.<a href="BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></h2> |
| <code><a href="BaseResourceAwareStrategy.NodeSortType.html" title="enum in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy.NodeSortType</a></code></div> |
| </section> |
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| <h2>Field Summary</h2> |
| <div class="inherited-list"> |
| <h3 id="fields-inherited-from-class-org.apache.storm.scheduler.resource.strategies.scheduling.BaseResourceAwareStrategy">Fields inherited from class org.apache.storm.scheduler.resource.strategies.scheduling.<a href="BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></h3> |
| <code><a href="BaseResourceAwareStrategy.html#cluster">cluster</a>, <a href="BaseResourceAwareStrategy.html#compToExecs">compToExecs</a>, <a href="BaseResourceAwareStrategy.html#config">config</a>, <a href="BaseResourceAwareStrategy.html#execSorter">execSorter</a>, <a href="BaseResourceAwareStrategy.html#execToComp">execToComp</a>, <a href="BaseResourceAwareStrategy.html#nodes">nodes</a>, <a href="BaseResourceAwareStrategy.html#nodeSorter">nodeSorter</a>, <a href="BaseResourceAwareStrategy.html#nodeSortType">nodeSortType</a>, <a href="BaseResourceAwareStrategy.html#orderExecutorsByProximity">orderExecutorsByProximity</a>, <a href="BaseResourceAwareStrategy.html#searcherState">searcherState</a>, <a href="BaseResourceAwareStrategy.html#sortNodesForEachExecutor">sortNodesForEachExecutor</a>, <a href="BaseResourceAwareStrategy.html#topologyDetails">topologyDetails</a>, <a href="BaseResourceAwareStrategy.html#topoName">topoName</a></code></div> |
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| <div class="caption"><span>Constructors</span></div> |
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| <div class="table-header col-first">Constructor</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">ConstraintSolverStrategy</a>()</code></div> |
| <div class="col-last even-row-color"> </div> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
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| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected <a href="../../SchedulingResult.html" title="class in org.apache.storm.scheduler.resource">SchedulingResult</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#checkSchedulingFeasibility()" class="member-name-link">checkSchedulingFeasibility</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Check scheduling feasibility for a quick failure as the second step in <a href="BaseResourceAwareStrategy.html#schedule(org.apache.storm.scheduler.Cluster,org.apache.storm.scheduler.TopologyDetails)"><code>BaseResourceAwareStrategy.schedule(Cluster, TopologyDetails)</code></a>.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected boolean</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#isExecAssignmentToWorkerValid(org.apache.storm.scheduler.ExecutorDetails,org.apache.storm.scheduler.WorkerSlot)" class="member-name-link">isExecAssignmentToWorkerValid</a><wbr>(<a href="../../../ExecutorDetails.html" title="class in org.apache.storm.scheduler">ExecutorDetails</a> exec, |
| <a href="../../../WorkerSlot.html" title="class in org.apache.storm.scheduler">WorkerSlot</a> worker)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Check if any constraints are violated if exec is scheduled on worker.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#prepareForScheduling(org.apache.storm.scheduler.Cluster,org.apache.storm.scheduler.TopologyDetails)" class="member-name-link">prepareForScheduling</a><wbr>(<a href="../../../Cluster.html" title="class in org.apache.storm.scheduler">Cluster</a> cluster, |
| <a href="../../../TopologyDetails.html" title="class in org.apache.storm.scheduler">TopologyDetails</a> topologyDetails)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Initialize instance variables as the first step in <a href="BaseResourceAwareStrategy.html#schedule(org.apache.storm.scheduler.Cluster,org.apache.storm.scheduler.TopologyDetails)"><code>BaseResourceAwareStrategy.schedule(Cluster, TopologyDetails)</code></a>.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static boolean</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#validateSolution(org.apache.storm.scheduler.Cluster,org.apache.storm.scheduler.TopologyDetails)" class="member-name-link">validateSolution</a><wbr>(<a href="../../../Cluster.html" title="class in org.apache.storm.scheduler">Cluster</a> cluster, |
| <a href="../../../TopologyDetails.html" title="class in org.apache.storm.scheduler">TopologyDetails</a> topo)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">Determines if a scheduling is valid and all constraints are satisfied (for use in testing).</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-org.apache.storm.scheduler.resource.strategies.scheduling.BaseResourceAwareStrategy">Methods inherited from class org.apache.storm.scheduler.resource.strategies.scheduling.<a href="BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></h3> |
| <code><a href="BaseResourceAwareStrategy.html#assignBoundAckersForNewWorkerSlot(org.apache.storm.scheduler.ExecutorDetails,org.apache.storm.scheduler.resource.RasNode,org.apache.storm.scheduler.WorkerSlot)">assignBoundAckersForNewWorkerSlot</a>, <a href="BaseResourceAwareStrategy.html#getMaxStateSearchFromTopoConf(java.util.Map)">getMaxStateSearchFromTopoConf</a>, <a href="BaseResourceAwareStrategy.html#hostnameToNodes(java.lang.String)">hostnameToNodes</a>, <a href="BaseResourceAwareStrategy.html#idToNode(java.lang.String)">idToNode</a>, <a href="BaseResourceAwareStrategy.html#isOrderByProximity(java.util.Map)">isOrderByProximity</a>, <a href="BaseResourceAwareStrategy.html#prepare(java.util.Map)">prepare</a>, <a href="BaseResourceAwareStrategy.html#schedule(org.apache.storm.scheduler.Cluster,org.apache.storm.scheduler.TopologyDetails)">schedule</a>, <a href="BaseResourceAwareStrategy.html#scheduleExecutorsOnNodes(java.util.List,java.lang.Iterable)">scheduleExecutorsOnNodes</a>, <a href="BaseResourceAwareStrategy.html#setExecSorter(org.apache.storm.scheduler.resource.strategies.scheduling.sorter.IExecSorter)">setExecSorter</a>, <a href="BaseResourceAwareStrategy.html#setNodeSorter(org.apache.storm.scheduler.resource.strategies.scheduling.sorter.INodeSorter)">setNodeSorter</a></code></div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3> |
| <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li> |
| <section class="constructor-details" id="constructor-detail"> |
| <h2>Constructor Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="<init>()"> |
| <h3>ConstraintSolverStrategy</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="element-name">ConstraintSolverStrategy</span>()</div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="prepareForScheduling(org.apache.storm.scheduler.Cluster,org.apache.storm.scheduler.TopologyDetails)"> |
| <h3>prepareForScheduling</h3> |
| <div class="member-signature"><span class="modifiers">protected</span> <span class="return-type">void</span> <span class="element-name">prepareForScheduling</span><wbr><span class="parameters">(<a href="../../../Cluster.html" title="class in org.apache.storm.scheduler">Cluster</a> cluster, |
| <a href="../../../TopologyDetails.html" title="class in org.apache.storm.scheduler">TopologyDetails</a> topologyDetails)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from class: <code><a href="BaseResourceAwareStrategy.html#prepareForScheduling(org.apache.storm.scheduler.Cluster,org.apache.storm.scheduler.TopologyDetails)">BaseResourceAwareStrategy</a></code></span></div> |
| <div class="block">Initialize instance variables as the first step in <a href="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="#prepareForScheduling(org.apache.storm.scheduler.Cluster,org.apache.storm.scheduler.TopologyDetails)"><code>prepareForScheduling(Cluster, TopologyDetails)</code></a>.</div> |
| <dl class="notes"> |
| <dt>Overrides:</dt> |
| <dd><code><a href="BaseResourceAwareStrategy.html#prepareForScheduling(org.apache.storm.scheduler.Cluster,org.apache.storm.scheduler.TopologyDetails)">prepareForScheduling</a></code> in class <code><a href="BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></code></dd> |
| <dt>Parameters:</dt> |
| <dd><code>cluster</code> - on which executors will be scheduled.</dd> |
| <dd><code>topologyDetails</code> - to be scheduled.</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="checkSchedulingFeasibility()"> |
| <h3>checkSchedulingFeasibility</h3> |
| <div class="member-signature"><span class="modifiers">protected</span> <span class="return-type"><a href="../../SchedulingResult.html" title="class in org.apache.storm.scheduler.resource">SchedulingResult</a></span> <span class="element-name">checkSchedulingFeasibility</span>()</div> |
| <div class="block"><span class="descfrm-type-label">Description copied from class: <code><a href="BaseResourceAwareStrategy.html#checkSchedulingFeasibility()">BaseResourceAwareStrategy</a></code></span></div> |
| <div class="block">Check scheduling feasibility for a quick failure as the second step in <a href="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="#checkSchedulingFeasibility()"><code>checkSchedulingFeasibility()</code></a> |
| to check for additional failure conditions.</div> |
| <dl class="notes"> |
| <dt>Overrides:</dt> |
| <dd><code><a href="BaseResourceAwareStrategy.html#checkSchedulingFeasibility()">checkSchedulingFeasibility</a></code> in class <code><a href="BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></code></dd> |
| <dt>Returns:</dt> |
| <dd>A non-null <a href="../../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> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="isExecAssignmentToWorkerValid(org.apache.storm.scheduler.ExecutorDetails,org.apache.storm.scheduler.WorkerSlot)"> |
| <h3>isExecAssignmentToWorkerValid</h3> |
| <div class="member-signature"><span class="modifiers">protected</span> <span class="return-type">boolean</span> <span class="element-name">isExecAssignmentToWorkerValid</span><wbr><span class="parameters">(<a href="../../../ExecutorDetails.html" title="class in org.apache.storm.scheduler">ExecutorDetails</a> exec, |
| <a href="../../../WorkerSlot.html" title="class in org.apache.storm.scheduler">WorkerSlot</a> worker)</span></div> |
| <div class="block">Check if any constraints are violated if exec is scheduled on worker.</div> |
| <dl class="notes"> |
| <dt>Overrides:</dt> |
| <dd><code><a href="BaseResourceAwareStrategy.html#isExecAssignmentToWorkerValid(org.apache.storm.scheduler.ExecutorDetails,org.apache.storm.scheduler.WorkerSlot)">isExecAssignmentToWorkerValid</a></code> in class <code><a href="BaseResourceAwareStrategy.html" title="class in org.apache.storm.scheduler.resource.strategies.scheduling">BaseResourceAwareStrategy</a></code></dd> |
| <dt>Parameters:</dt> |
| <dd><code>exec</code> - being scheduled.</dd> |
| <dd><code>worker</code> - on which to schedule.</dd> |
| <dt>Returns:</dt> |
| <dd>true if scheduling exec on worker does not violate any constraints, returns false if it does</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="validateSolution(org.apache.storm.scheduler.Cluster,org.apache.storm.scheduler.TopologyDetails)"> |
| <h3>validateSolution</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type">boolean</span> <span class="element-name">validateSolution</span><wbr><span class="parameters">(<a href="../../../Cluster.html" title="class in org.apache.storm.scheduler">Cluster</a> cluster, |
| <a href="../../../TopologyDetails.html" title="class in org.apache.storm.scheduler">TopologyDetails</a> topo)</span></div> |
| <div class="block">Determines if a scheduling is valid and all constraints are satisfied (for use in testing). |
| This is done in three steps. |
| |
| <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="ConstraintSolverConfig.html#getMaxNodeCoLocationCnts()"><code>ConstraintSolverConfig.getMaxNodeCoLocationCnts()</code></a>. |
| </li> |
| |
| <li> |
| Check if incompatibility-constraints are satisfied. Incompatible components |
| <a href="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 class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>cluster</code> - on which scheduling was done.</dd> |
| <dd><code>topo</code> - TopologyDetails being scheduled.</dd> |
| <dt>Returns:</dt> |
| <dd>true if solution is valid, false otherwise.</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
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