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| <div class="subTitle">org.apache.ignite.spi.loadbalancing.roundrobin</div> |
| <h2 title="Class RoundRobinLoadBalancingSpi" class="title">Class RoundRobinLoadBalancingSpi</h2> |
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| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
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| <li><a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html" title="class in org.apache.ignite.spi">org.apache.ignite.spi.IgniteSpiAdapter</a></li> |
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| <ul class="inheritance"> |
| <li>org.apache.ignite.spi.loadbalancing.roundrobin.RoundRobinLoadBalancingSpi</li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html" title="interface in org.apache.ignite.spi">IgniteSpi</a>, <a href="../../../../../../org/apache/ignite/spi/loadbalancing/LoadBalancingSpi.html" title="interface in org.apache.ignite.spi.loadbalancing">LoadBalancingSpi</a></dd> |
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| <br> |
| <pre><a href="../../../../../../org/apache/ignite/spi/IgniteSpiMultipleInstancesSupport.html" title="annotation in org.apache.ignite.spi">@IgniteSpiMultipleInstancesSupport</a>(<a href="../../../../../../org/apache/ignite/spi/IgniteSpiMultipleInstancesSupport.html#value--">value</a>=true) |
| public class <span class="typeNameLabel">RoundRobinLoadBalancingSpi</span> |
| extends <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html" title="class in org.apache.ignite.spi">IgniteSpiAdapter</a> |
| implements <a href="../../../../../../org/apache/ignite/spi/loadbalancing/LoadBalancingSpi.html" title="interface in org.apache.ignite.spi.loadbalancing">LoadBalancingSpi</a></pre> |
| <div class="block">This SPI iterates through nodes in round-robin fashion and pick the next |
| sequential node. Two modes of operation are supported: per-task and global |
| (see <a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#setPerTask-boolean-"><code>setPerTask(boolean)</code></a> configuration). Global mode is used be default. |
| <p> |
| When configured in per-task mode, implementation will pick a random node at the |
| beginning of every task execution and then sequentially iterate through all |
| nodes in topology starting from the picked node. For cases when split size |
| is equal to the number of nodes, this mode guarantees that all nodes will |
| participate in the split. |
| <p> |
| When configured in global mode, a single sequential queue of nodes is maintained for |
| all tasks and the next node in the queue is picked every time. In this mode (unlike in |
| <code>per-task</code> mode) it is possible that even if split size may be equal to the |
| number of nodes, some jobs within the same task will be assigned to the same node if |
| multiple tasks are executing concurrently. |
| <h1 class="header">Coding Example</h1> |
| If you are using <a href="../../../../../../org/apache/ignite/compute/ComputeTaskSplitAdapter.html" title="class in org.apache.ignite.compute"><code>ComputeTaskSplitAdapter</code></a> then load balancing logic |
| is transparent to your code and is handled automatically by the adapter. |
| Here is an example of how your task will look: |
| <pre name="code" class="java"> |
| public class MyFooBarTask extends ComputeTaskSplitAdapter<Object, Object> { |
| @Override |
| protected Collection<? extends ComputeJob> split(int gridSize, Object arg) throws IgniteCheckedException { |
| List<MyFooBarJob> jobs = new ArrayList<MyFooBarJob>(gridSize); |
| |
| for (int i = 0; i < gridSize; i++) { |
| jobs.add(new MyFooBarJob(arg)); |
| } |
| |
| // Node assignment via load balancer |
| // happens automatically. |
| return jobs; |
| } |
| ... |
| } |
| </pre> |
| If you need more fine-grained control over how some jobs within task get mapped to a node |
| and use affinity load balancing for some other jobs within task, then you should use |
| <a href="../../../../../../org/apache/ignite/compute/ComputeTaskAdapter.html" title="class in org.apache.ignite.compute"><code>ComputeTaskAdapter</code></a>. Here is an example of how your task will look. Note that in this |
| case we manually inject load balancer and use it to pick the best node. Doing it in |
| such way would allow user to map some jobs manually and for others use load balancer. |
| <pre name="code" class="java"> |
| public class MyFooBarTask extends ComputeTaskAdapter<String, String> { |
| // Inject load balancer. |
| @LoadBalancerResource |
| ComputeLoadBalancer balancer; |
| |
| // Map jobs to grid nodes. |
| public Map<? extends ComputeJob, ClusterNode> map(List<ClusterNode> subgrid, String arg) throws IgniteCheckedException { |
| Map<MyFooBarJob, ClusterNode> jobs = new HashMap<MyFooBarJob, ClusterNode>(subgrid.size()); |
| |
| // In more complex cases, you can actually do |
| // more complicated assignments of jobs to nodes. |
| for (int i = 0; i < subgrid.size(); i++) { |
| // Pick the next best balanced node for the job. |
| jobs.put(new MyFooBarJob(arg), balancer.getBalancedNode()) |
| } |
| |
| return jobs; |
| } |
| |
| // Aggregate results into one compound result. |
| public String reduce(List<ComputeJobResult> results) throws IgniteCheckedException { |
| // For the purpose of this example we simply |
| // concatenate string representation of every |
| // job result |
| StringBuilder buf = new StringBuilder(); |
| |
| for (ComputeJobResult res : results) { |
| // Append string representation of result |
| // returned by every job. |
| buf.append(res.getData().string()); |
| } |
| |
| return buf.string(); |
| } |
| } |
| </pre> |
| <p> |
| <h1 class="header">Configuration</h1> |
| In order to use this load balancer, you should configure your grid instance |
| to use <a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html" title="class in org.apache.ignite.spi.loadbalancing.roundrobin"><code>RoundRobinLoadBalancingSpi</code></a> either from Spring XML file or |
| directly. The following configuration parameters are supported: |
| <h2 class="header">Mandatory</h2> |
| This SPI has no mandatory configuration parameters. |
| <h2 class="header">Optional</h2> |
| The following configuration parameters are optional: |
| <ul> |
| <li> |
| Flag that indicates whether to use <code>per-task</code> or global |
| round-robin modes described above (see <a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#setPerTask-boolean-"><code>setPerTask(boolean)</code></a>). |
| </li> |
| </ul> |
| Below is Java configuration example: |
| <pre name="code" class="java"> |
| RoundRobinLoadBalancingSpi spi = new RoundRobinLoadBalancingSpi(); |
| |
| // Configure SPI to use global round-robin mode. |
| spi.setPerTask(false); |
| |
| IgniteConfiguration cfg = new IgniteConfiguration(); |
| |
| // Override default load balancing SPI. |
| cfg.setLoadBalancingSpi(spi); |
| |
| // Starts grid. |
| G.start(cfg); |
| </pre> |
| Here is how you can configure <a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html" title="class in org.apache.ignite.spi.loadbalancing.roundrobin"><code>RoundRobinLoadBalancingSpi</code></a> using Spring XML configuration: |
| <pre name="code" class="xml"> |
| <property name="loadBalancingSpi"> |
| <bean class="org.apache.ignite.spi.loadBalancing.roundrobin.RoundRobinLoadBalancingSpi"> |
| <!-- Set to global round-robin mode. --> |
| <property name="perTask" value="false"/> |
| </bean> |
| </property> |
| </pre> |
| <p> |
| <img src="http://ignite.apache.org/images/spring-small.png"> |
| <br> |
| For information about Spring framework visit <a href="http://www.springframework.org/">www.springframework.org</a></div> |
| </li> |
| </ul> |
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| <h3>Fields inherited from class org.apache.ignite.spi.<a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html" title="class in org.apache.ignite.spi">IgniteSpiAdapter</a></h3> |
| <code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#ignite">ignite</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#igniteInstanceName">igniteInstanceName</a></code></li> |
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| <h3>Constructor Summary</h3> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#RoundRobinLoadBalancingSpi--">RoundRobinLoadBalancingSpi</a></span>()</code> </td> |
| </tr> |
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| <h3>Method Summary</h3> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#getBalancedNode-org.apache.ignite.compute.ComputeTaskSession-java.util.List-org.apache.ignite.compute.ComputeJob-">getBalancedNode</a></span>(<a href="../../../../../../org/apache/ignite/compute/ComputeTaskSession.html" title="interface in org.apache.ignite.compute">ComputeTaskSession</a> ses, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><span class='angle_bracket'><</span><a href="../../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span> top, |
| <a href="../../../../../../org/apache/ignite/compute/ComputeJob.html" title="interface in org.apache.ignite.compute">ComputeJob</a> job)</code> |
| <div class="block">Gets balanced node for specified job within given task session.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#isPerTask--">isPerTask</a></span>()</code> |
| <div class="block">See <a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#setPerTask-boolean-"><code>setPerTask(boolean)</code></a>.</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/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#onContextDestroyed0--">onContextDestroyed0</a></span>()</code> |
| <div class="block">Method to be called in the beginning of onContextDestroyed() method.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#onContextInitialized0-org.apache.ignite.spi.IgniteSpiContext-">onContextInitialized0</a></span>(<a href="../../../../../../org/apache/ignite/spi/IgniteSpiContext.html" title="interface in org.apache.ignite.spi">IgniteSpiContext</a> spiCtx)</code> |
| <div class="block">Method to be called in the end of onContextInitialized method.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html" title="class in org.apache.ignite.spi.loadbalancing.roundrobin">RoundRobinLoadBalancingSpi</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#setName-java.lang.String-">setName</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> |
| <div class="block">Sets SPI name.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html" title="class in org.apache.ignite.spi.loadbalancing.roundrobin">RoundRobinLoadBalancingSpi</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#setPerTask-boolean-">setPerTask</a></span>(boolean isPerTask)</code> |
| <div class="block">Configuration parameter indicating whether a new round robin order should be |
| created for every task.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#spiStart-java.lang.String-">spiStart</a></span>(@Nullable <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> igniteInstanceName)</code> |
| <div class="block">This method is called to start SPI.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#spiStop--">spiStop</a></span>()</code> |
| <div class="block">This method is called to stop SPI.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><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></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#toString--">toString</a></span>()</code></td> |
| </tr> |
| </table> |
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| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.ignite.spi.<a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html" title="class in org.apache.ignite.spi">IgniteSpiAdapter</a></h3> |
| <code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#addTimeoutObject-org.apache.ignite.spi.IgniteSpiTimeoutObject-">addTimeoutObject</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#assertParameter-boolean-java.lang.String-">assertParameter</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#checkConfigurationConsistency0-org.apache.ignite.spi.IgniteSpiContext-org.apache.ignite.cluster.ClusterNode-boolean-">checkConfigurationConsistency0</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#clientFailureDetectionTimeout--">clientFailureDetectionTimeout</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#configInfo-java.lang.String-java.lang.Object-">configInfo</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#createSpiAttributeName-java.lang.String-">createSpiAttributeName</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#failureDetectionTimeout--">failureDetectionTimeout</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#failureDetectionTimeoutEnabled--">failureDetectionTimeoutEnabled</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#failureDetectionTimeoutEnabled-boolean-">failureDetectionTimeoutEnabled</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#getConsistentAttributeNames--">getConsistentAttributeNames</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#getExceptionRegistry--">getExceptionRegistry</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#getLocalNode--">getLocalNode</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#getName--">getName</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#getNodeAttributes--">getNodeAttributes</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#getSpiContext--">getSpiContext</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#ignite--">ignite</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#initFailureDetectionTimeout--">initFailureDetectionTimeout</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#injectables--">injectables</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#injectResources-org.apache.ignite.Ignite-">injectResources</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#isNodeStopping--">isNodeStopping</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#onBeforeStart--">onBeforeStart</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#onClientDisconnected-org.apache.ignite.lang.IgniteFuture-">onClientDisconnected</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#onClientReconnected-boolean-">onClientReconnected</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#onContextDestroyed--">onContextDestroyed</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#onContextInitialized-org.apache.ignite.spi.IgniteSpiContext-">onContextInitialized</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#registerMBean-java.lang.String-T-java.lang.Class-">registerMBean</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#removeTimeoutObject-org.apache.ignite.spi.IgniteSpiTimeoutObject-">removeTimeoutObject</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#started--">started</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#startInfo--">startInfo</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#startStopwatch--">startStopwatch</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#stopInfo--">stopInfo</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#unregisterMBean--">unregisterMBean</a></code></li> |
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| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
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| <li class="blockList"><a name="methods.inherited.from.class.org.apache.ignite.spi.IgniteSpi"> |
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| <h3>Methods inherited from interface org.apache.ignite.spi.<a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html" title="interface in org.apache.ignite.spi">IgniteSpi</a></h3> |
| <code><a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html#getName--">getName</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html#getNodeAttributes--">getNodeAttributes</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html#onClientDisconnected-org.apache.ignite.lang.IgniteFuture-">onClientDisconnected</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html#onClientReconnected-boolean-">onClientReconnected</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html#onContextDestroyed--">onContextDestroyed</a>, <a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html#onContextInitialized-org.apache.ignite.spi.IgniteSpiContext-">onContextInitialized</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="RoundRobinLoadBalancingSpi--"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>RoundRobinLoadBalancingSpi</h4> |
| <pre>public RoundRobinLoadBalancingSpi()</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="isPerTask--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isPerTask</h4> |
| <pre>public boolean isPerTask()</pre> |
| <div class="block">See <a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html#setPerTask-boolean-"><code>setPerTask(boolean)</code></a>.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Configuration parameter indicating whether a new round robin order should |
| be created for every task. Default is <code>false</code>.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setPerTask-boolean-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setPerTask</h4> |
| <pre><a href="../../../../../../org/apache/ignite/spi/IgniteSpiConfiguration.html" title="annotation in org.apache.ignite.spi">@IgniteSpiConfiguration</a>(<a href="../../../../../../org/apache/ignite/spi/IgniteSpiConfiguration.html#optional--">optional</a>=true) |
| public <a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html" title="class in org.apache.ignite.spi.loadbalancing.roundrobin">RoundRobinLoadBalancingSpi</a> setPerTask(boolean isPerTask)</pre> |
| <div class="block">Configuration parameter indicating whether a new round robin order should be |
| created for every task. If <code>true</code> then load balancer is guaranteed |
| to iterate through nodes sequentially for every task - so as long as number |
| of jobs is less than or equal to the number of nodes, jobs are guaranteed to |
| be assigned to unique nodes. If <code>false</code> then one round-robin order |
| will be maintained for all tasks, so when tasks execute concurrently, it |
| is possible for more than one job within task to be assigned to the same |
| node. |
| <p> |
| Default is <code>false</code>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>isPerTask</code> - Configuration parameter indicating whether a new round robin order should |
| be created for every task. Default is <code>false</code>.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>this</code> for chaining.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="spiStart-java.lang.String-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>spiStart</h4> |
| <pre>public void spiStart(@Nullable |
| @Nullable <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> igniteInstanceName) |
| throws <a href="../../../../../../org/apache/ignite/spi/IgniteSpiException.html" title="class in org.apache.ignite.spi">IgniteSpiException</a></pre> |
| <div class="block">This method is called to start SPI. After this method returns |
| successfully kernel assumes that SPI is fully operational.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html#spiStart-java.lang.String-">spiStart</a></code> in interface <code><a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html" title="interface in org.apache.ignite.spi">IgniteSpi</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>igniteInstanceName</code> - Name of Ignite instance this SPI is being started for |
| (<code>null</code> for default Ignite instance).</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiException.html" title="class in org.apache.ignite.spi">IgniteSpiException</a></code> - Throws in case of any error during SPI start.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="spiStop--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>spiStop</h4> |
| <pre>public void spiStop() |
| throws <a href="../../../../../../org/apache/ignite/spi/IgniteSpiException.html" title="class in org.apache.ignite.spi">IgniteSpiException</a></pre> |
| <div class="block">This method is called to stop SPI. After this method returns kernel |
| assumes that this SPI is finished and all resources acquired by it |
| are released. |
| <p> |
| <b> |
| Note that this method can be called at any point including during |
| recovery of failed start. It should make no assumptions on what state SPI |
| will be in when this method is called. |
| </b></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html#spiStop--">spiStop</a></code> in interface <code><a href="../../../../../../org/apache/ignite/spi/IgniteSpi.html" title="interface in org.apache.ignite.spi">IgniteSpi</a></code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiException.html" title="class in org.apache.ignite.spi">IgniteSpiException</a></code> - Thrown in case of any error during SPI stop.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="onContextInitialized0-org.apache.ignite.spi.IgniteSpiContext-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>onContextInitialized0</h4> |
| <pre>protected void onContextInitialized0(<a href="../../../../../../org/apache/ignite/spi/IgniteSpiContext.html" title="interface in org.apache.ignite.spi">IgniteSpiContext</a> spiCtx) |
| throws <a href="../../../../../../org/apache/ignite/spi/IgniteSpiException.html" title="class in org.apache.ignite.spi">IgniteSpiException</a></pre> |
| <div class="block">Method to be called in the end of onContextInitialized method.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#onContextInitialized0-org.apache.ignite.spi.IgniteSpiContext-">onContextInitialized0</a></code> in class <code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html" title="class in org.apache.ignite.spi">IgniteSpiAdapter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>spiCtx</code> - SPI context.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiException.html" title="class in org.apache.ignite.spi">IgniteSpiException</a></code> - In case of errors.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="onContextDestroyed0--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>onContextDestroyed0</h4> |
| <pre>protected void onContextDestroyed0()</pre> |
| <div class="block">Method to be called in the beginning of onContextDestroyed() method.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#onContextDestroyed0--">onContextDestroyed0</a></code> in class <code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html" title="class in org.apache.ignite.spi">IgniteSpiAdapter</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getBalancedNode-org.apache.ignite.compute.ComputeTaskSession-java.util.List-org.apache.ignite.compute.ComputeJob-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getBalancedNode</h4> |
| <pre>public <a href="../../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> getBalancedNode(<a href="../../../../../../org/apache/ignite/compute/ComputeTaskSession.html" title="interface in org.apache.ignite.compute">ComputeTaskSession</a> ses, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><span class='angle_bracket'><</span><a href="../../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span> top, |
| <a href="../../../../../../org/apache/ignite/compute/ComputeJob.html" title="interface in org.apache.ignite.compute">ComputeJob</a> job)</pre> |
| <div class="block">Gets balanced node for specified job within given task session.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/ignite/spi/loadbalancing/LoadBalancingSpi.html#getBalancedNode-org.apache.ignite.compute.ComputeTaskSession-java.util.List-org.apache.ignite.compute.ComputeJob-">getBalancedNode</a></code> in interface <code><a href="../../../../../../org/apache/ignite/spi/loadbalancing/LoadBalancingSpi.html" title="interface in org.apache.ignite.spi.loadbalancing">LoadBalancingSpi</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>ses</code> - Grid task session for currently executing task.</dd> |
| <dd><code>top</code> - Topology of task nodes from which to pick the best balanced node for given job.</dd> |
| <dd><code>job</code> - Job for which to pick the best balanced node.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Best balanced node for the given job within given task session.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setName-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setName</h4> |
| <pre>public <a href="../../../../../../org/apache/ignite/spi/loadbalancing/roundrobin/RoundRobinLoadBalancingSpi.html" title="class in org.apache.ignite.spi.loadbalancing.roundrobin">RoundRobinLoadBalancingSpi</a> setName(<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> |
| <div class="block">Sets SPI name.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html#setName-java.lang.String-">setName</a></code> in class <code><a href="../../../../../../org/apache/ignite/spi/IgniteSpiAdapter.html" title="class in org.apache.ignite.spi">IgniteSpiAdapter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>name</code> - SPI name.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>this</code> for chaining.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="toString--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>toString</h4> |
| <pre>public <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> toString()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a></code> in class <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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| <p class="legalCopy"><small><table width="100%" border="0" cellspacing=0 cellpadding=0 style="padding: 5px"> <tr> <td> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <a target=_blank href="https://ignite.apache.org"><nobr>2021 Copyright © Apache Software Foundation</nobr></a> </td> </tr> </tbody> </table> </td> <td width="100%" align="right" valign="center"> <a href="https://twitter.com/ApacheIgnite" class="twitter-follow-button" data-show-count="false" data-size="large">Follow @ApacheIgnite</a> </td> </tr> <tr> <td colspan="2" valign="top" align="left"> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <b>Ignite Database and Caching Platform</b> </td> <td>: ver. <strong>2.11.1</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>: December 20 2021 </td> </tr> </tbody> </table> </td> </tr> </table></small></p> |
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| </html> |
