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| <div class="subTitle">org.apache.ignite.cluster</div> |
| <h2 title="Interface ClusterNode" class="title">Interface ClusterNode</h2> |
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| <dt>All Superinterfaces:</dt> |
| <dd><a href="../../../../org/apache/ignite/cluster/BaselineNode.html" title="interface in org.apache.ignite.cluster">BaselineNode</a></dd> |
| </dl> |
| <dl> |
| <dt>All Known Implementing Classes:</dt> |
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| <pre>public interface <span class="typeNameLabel">ClusterNode</span> |
| extends <a href="../../../../org/apache/ignite/cluster/BaselineNode.html" title="interface in org.apache.ignite.cluster">BaselineNode</a></pre> |
| <div class="block">Interface representing a single cluster node. Use <a href="../../../../org/apache/ignite/cluster/ClusterNode.html#attribute-java.lang.String-"><code>attribute(String)</code></a> or |
| <a href="../../../../org/apache/ignite/cluster/ClusterNode.html#metrics--"><code>metrics()</code></a> to get static and dynamic information about cluster nodes. |
| <code>ClusterNode</code> list, which includes all nodes within task topology, is provided |
| to <a href="../../../../org/apache/ignite/compute/ComputeTask.html#map-java.util.List-T-"><code>ComputeTask.map(List, Object)</code></a> method. |
| <p> |
| <h1 class="header">Cluster Node Attributes</h1> |
| You can use cluster node attributes to provide static information about a node. |
| This information is initialized once within a cluster, during the node startup, and |
| remains the same throughout the lifetime of a node. Use |
| <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getUserAttributes--"><code>IgniteConfiguration.getUserAttributes()</code></a> method to initialize your custom |
| node attributes at startup. Here is an example of how to assign an attribute to a node at startup: |
| <pre name="code" class="xml"> |
| <bean class="org.apache.ignite.configuration.IgniteConfiguration"> |
| ... |
| <property name="userAttributes"> |
| <map> |
| <entry key="worker" value="true"/> |
| </map> |
| </property> |
| ... |
| </bean> |
| </pre> |
| <p> |
| The system adds the following attributes automatically: |
| <ul> |
| <li><code>{@link System#getProperties()}</code> - All system properties.</li> |
| <li><code>{@link System#getenv(String)}</code> - All environment properties.</li> |
| <li><code>org.ignite.build.ver</code> - Ignite build version.</li> |
| <li><code>org.apache.ignite.jit.name</code> - Name of JIT compiler used.</li> |
| <li><code>org.apache.ignite.net.itf.name</code> - Name of network interface.</li> |
| <li><code>org.apache.ignite.user.name</code> - Operating system user name.</li> |
| <li><code>org.apache.ignite.ignite.name</code> - Ignite name (see <a href="../../../../org/apache/ignite/Ignite.html#name--"><code>Ignite.name()</code></a>).</li> |
| <li> |
| <code>spiName.org.apache.ignite.spi.class</code> - SPI implementation class for every SPI, |
| where <code>spiName</code> is the name of the SPI (see <a href="../../../../org/apache/ignite/spi/IgniteSpi.html#getName--"><code>IgniteSpi.getName()</code></a>. |
| </li> |
| <li> |
| <code>spiName.org.apache.ignite.spi.ver</code> - SPI version for every SPI, |
| where <code>spiName</code> is the name of the SPI (see <a href="../../../../org/apache/ignite/spi/IgniteSpi.html#getName--"><code>IgniteSpi.getName()</code></a>. |
| </li> |
| </ul> |
| <p> |
| Note that all System and Environment properties for all nodes are automatically included |
| into node attributes. This gives you an ability to get any information specified |
| in <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/System.html?is-external=true#getProperties--" title="class or interface in java.lang"><code>System.getProperties()</code></a> about any node. So for example, in order to print out |
| information about Operating System for all nodes you would do the following: |
| <pre name="code" class="java"> |
| for (ClusterNode node : ignite.cluster().nodes()) { |
| System.out.println("Operating system name: " + node.getAttribute("os.name")); |
| System.out.println("Operating system architecture: " + node.getAttribute("os.arch")); |
| System.out.println("Operating system version: " + node.getAttribute("os.version")); |
| } |
| </pre> |
| <p> |
| <h1 class="header">Cluster Node Metrics</h1> |
| Cluster node metrics (see <a href="../../../../org/apache/ignite/cluster/ClusterNode.html#metrics--"><code>metrics()</code></a>) are updated frequently for all nodes |
| and can be used to get dynamic information about a node. The frequency of update |
| is controlled by <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getMetricsUpdateFrequency--"><code>IgniteConfiguration.getMetricsUpdateFrequency()</code></a> parameter. |
| The metrics data will be updated every <code>2</code> seconds by default. |
| <p> |
| Grid node metrics provide information that can frequently change, |
| such as Heap and Non-Heap memory utilization, CPU load, number of active and waiting |
| grid jobs, etc... This information can become useful during job collision resolution or |
| <a href="../../../../org/apache/ignite/compute/ComputeTask.html#map-java.util.List-T-"><code>ComputeTask.map(List, Object)</code></a> operation when jobs are |
| assigned to remote nodes for execution. |
| <p> |
| Local node metrics are registered as <code>MBean</code> and can be accessed from |
| any JMX management console. The simplest way is to use standard <code>jconsole</code> |
| that comes with JDK as it also provides ability to view any node parameter |
| as a graph.</div> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract 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="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</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><span class='angle_bracket'>></span></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#addresses--">addresses</a></span>()</code> |
| <div class="block">Gets collection of addresses this node is known by.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><span class='angle_bracket'><</span>T<span class='angle_bracket'>></span> T</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#attribute-java.lang.String-">attribute</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">Gets a node attribute.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><span class='angle_bracket'><</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>,<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><span class='angle_bracket'>></span></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#attributes--">attributes</a></span>()</code> |
| <div class="block">Gets all node attributes.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><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></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#consistentId--">consistentId</a></span>()</code> |
| <div class="block">Gets consistent globally unique node ID.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><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><span class='angle_bracket'><</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><span class='angle_bracket'>></span></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#hostNames--">hostNames</a></span>()</code> |
| <div class="block">Gets collection of host names this node is known by.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#id--">id</a></span>()</code> |
| <div class="block">Gets globally unique node ID.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#isClient--">isClient</a></span>()</code> |
| <div class="block">Whether this node is cache client (see <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#isClientMode--"><code>IgniteConfiguration.isClientMode()</code></a>).</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#isDaemon--">isDaemon</a></span>()</code> |
| <div class="block">Tests whether or not this node is a daemon.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#isLocal--">isLocal</a></span>()</code> |
| <div class="block">Tests whether or not this node is a local node.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/cluster/ClusterMetrics.html" title="interface in org.apache.ignite.cluster">ClusterMetrics</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#metrics--">metrics</a></span>()</code> |
| <div class="block">Gets metrics snapshot for this node.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#order--">order</a></span>()</code> |
| <div class="block">Node order within grid topology.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/lang/IgniteProductVersion.html" title="class in org.apache.ignite.lang">IgniteProductVersion</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/ignite/cluster/ClusterNode.html#version--">version</a></span>()</code> |
| <div class="block">Gets node version.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
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| <!-- --> |
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| <h3>Method Detail</h3> |
| <a name="id--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>id</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/UUID.html?is-external=true" title="class or interface in java.util">UUID</a> id()</pre> |
| <div class="block">Gets globally unique node ID. A new ID is generated every time a node restarts.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Globally unique node ID.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="consistentId--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>consistentId</h4> |
| <pre><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> consistentId()</pre> |
| <div class="block">Gets consistent globally unique node ID. Unlike <a href="../../../../org/apache/ignite/cluster/ClusterNode.html#id--"><code>id()</code></a> method, |
| this method returns consistent node ID which survives node restarts.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/ignite/cluster/BaselineNode.html#consistentId--">consistentId</a></code> in interface <code><a href="../../../../org/apache/ignite/cluster/BaselineNode.html" title="interface in org.apache.ignite.cluster">BaselineNode</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Consistent globally unique node ID.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="attribute-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>attribute</h4> |
| <pre>@Nullable |
| <span class='angle_bracket'><</span>T<span class='angle_bracket'>></span> T attribute(<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">Gets a node attribute. Attributes are assigned to nodes at startup |
| via <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getUserAttributes--"><code>IgniteConfiguration.getUserAttributes()</code></a> method. |
| <p> |
| The system adds the following attributes automatically: |
| <ul> |
| <li><code>{@link System#getProperties()}</code> - All system properties.</li> |
| <li><code>{@link System#getenv(String)}</code> - All environment properties.</li> |
| <li>All attributes defined in <code>IgniteNodeAttributes</code></li> |
| </ul> |
| <p> |
| Note that attributes cannot be changed at runtime.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/ignite/cluster/BaselineNode.html#attribute-java.lang.String-">attribute</a></code> in interface <code><a href="../../../../org/apache/ignite/cluster/BaselineNode.html" title="interface in org.apache.ignite.cluster">BaselineNode</a></code></dd> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - Attribute Type.</dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>name</code> - Attribute name. <b>Note</b> that attribute names starting with |
| <code>org.apache.ignite</code> are reserved for internal use.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Attribute value or <code>null</code>.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="metrics--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>metrics</h4> |
| <pre><a href="../../../../org/apache/ignite/cluster/ClusterMetrics.html" title="interface in org.apache.ignite.cluster">ClusterMetrics</a> metrics()</pre> |
| <div class="block">Gets metrics snapshot for this node. Note that node metrics are constantly updated |
| and provide up to date information about nodes. For example, you can get |
| an idea about CPU load on remote node via <a href="../../../../org/apache/ignite/cluster/ClusterMetrics.html#getCurrentCpuLoad--"><code>ClusterMetrics.getCurrentCpuLoad()</code></a> |
| method and use it during <a href="../../../../org/apache/ignite/compute/ComputeTask.html#map-java.util.List-T-"><code>ComputeTask.map(List, Object)</code></a> or during collision |
| resolution. |
| <p> |
| Node metrics are updated with some delay which is controlled by |
| <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getMetricsUpdateFrequency--"><code>IgniteConfiguration.getMetricsUpdateFrequency()</code></a> parameter. |
| By default the update will happen every <code>2</code> seconds.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Runtime metrics snapshot for this node.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="attributes--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>attributes</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><span class='angle_bracket'><</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>,<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><span class='angle_bracket'>></span> attributes()</pre> |
| <div class="block">Gets all node attributes. Attributes are assigned to nodes at startup |
| via <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getUserAttributes--"><code>IgniteConfiguration.getUserAttributes()</code></a> method. |
| <p> |
| The system adds the following attributes automatically: |
| <ul> |
| <li><code>{@link System#getProperties()}</code> - All system properties.</li> |
| <li><code>{@link System#getenv(String)}</code> - All environment properties.</li> |
| <li>All attributes defined in <code>IgniteNodeAttributes</code></li> |
| </ul> |
| <p> |
| Note that attributes cannot be changed at runtime.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/ignite/cluster/BaselineNode.html#attributes--">attributes</a></code> in interface <code><a href="../../../../org/apache/ignite/cluster/BaselineNode.html" title="interface in org.apache.ignite.cluster">BaselineNode</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>All node attributes.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="addresses--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>addresses</h4> |
| <pre><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><span class='angle_bracket'><</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><span class='angle_bracket'>></span> addresses()</pre> |
| <div class="block">Gets collection of addresses this node is known by. |
| <p> |
| If <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getLocalHost--"><code>IgniteConfiguration.getLocalHost()</code></a> value isn't <code>null</code> node will try to use that |
| address for all communications and returned collection will contain only that address. |
| If it is <code>null</code> then local wildcard address will be used, and Ignite |
| will make the best effort to supply all addresses of that node in returned collection.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Collection of addresses.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="hostNames--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>hostNames</h4> |
| <pre><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><span class='angle_bracket'><</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><span class='angle_bracket'>></span> hostNames()</pre> |
| <div class="block">Gets collection of host names this node is known by. |
| <p> |
| If <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getLocalHost--"><code>IgniteConfiguration.getLocalHost()</code></a> value isn't <code>null</code> node will try to use |
| the host name of that resolved address for all communications and |
| returned collection will contain only that host name. |
| If that host name can not be resolved then ip address returned by method <a href="../../../../org/apache/ignite/cluster/ClusterNode.html#addresses--"><code>addresses()</code></a> is used. |
| <p> |
| If <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getLocalHost--"><code>IgniteConfiguration.getLocalHost()</code></a> value is <code>null</code> then local wildcard address will be used, |
| and this method returns host names of all addresses of that node. |
| <p> |
| Note: the loopback address will be omitted in results.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Collection of host names.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="order--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>order</h4> |
| <pre>long order()</pre> |
| <div class="block">Node order within grid topology. Discovery SPIs that support node ordering will |
| assign a proper order to each node and will guarantee that discovery event notifications |
| for new nodes will come in proper order. All other SPIs not supporting ordering |
| may choose to return node startup time here. |
| <p> |
| <b>NOTE</b>: in cases when discovery SPI doesn't support ordering Ignite cannot |
| guarantee that orders on all nodes will be unique or chronologically correct. |
| If such guarantee is required - make sure use discovery SPI that provides ordering.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Node startup order.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="version--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>version</h4> |
| <pre><a href="../../../../org/apache/ignite/lang/IgniteProductVersion.html" title="class in org.apache.ignite.lang">IgniteProductVersion</a> version()</pre> |
| <div class="block">Gets node version.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Node version.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isLocal--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isLocal</h4> |
| <pre>boolean isLocal()</pre> |
| <div class="block">Tests whether or not this node is a local node.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>True</code> if this node is a local node, <code>false</code> otherwise.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isDaemon--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isDaemon</h4> |
| <pre>boolean isDaemon()</pre> |
| <div class="block">Tests whether or not this node is a daemon. |
| <p> |
| Daemon nodes are the usual cluster nodes that participate in topology but are not |
| visible on the main APIs, i.e. they are not part of any cluster group. The only |
| way to see daemon nodes is to use <a href="../../../../org/apache/ignite/cluster/ClusterGroup.html#forDaemons--"><code>ClusterGroup.forDaemons()</code></a> method. |
| <p> |
| Daemon nodes are used primarily for management and monitoring functionality that |
| is build on Ignite and needs to participate in the topology, but should be |
| excluded from the "normal" topology, so that they won't participate in the task execution |
| or data grid operations. |
| <p> |
| Application code should never use daemon nodes.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>True</code> if this node is a daemon, <code>false</code> otherwise.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isClient--"> |
| <!-- --> |
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| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>isClient</h4> |
| <pre>boolean isClient()</pre> |
| <div class="block">Whether this node is cache client (see <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#isClientMode--"><code>IgniteConfiguration.isClientMode()</code></a>).</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>True if client</code>.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#isClientMode--"><code>IgniteConfiguration.isClientMode()</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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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>2022 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>2.12.0</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>: January 10 2022 </td> </tr> </tbody> </table> </td> </tr> </table></small></p> |
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