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| <div class="subTitle">org.apache.axis2.clustering.management</div> |
| <h2 title="Interface NodeManager" class="title">Interface NodeManager</h2> |
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| <pre>public interface <span class="strong">NodeManager</span> |
| extends <a href="../../../../../org/apache/axis2/description/ParameterInclude.html" title="interface in org.apache.axis2.description">ParameterInclude</a></pre> |
| <div class="block"><p> |
| This interface is responsible for handling configuration management. Configuraion changes include |
| <p/> |
| <ul> |
| <li>Rebooting an entire cluster, in which case, all nodes have to load the new Axis2 configuration |
| in a consistent manner |
| </li> |
| <li> |
| Deploying a new service to a cluster or undeploying a service from a cluster |
| </li> |
| <li> |
| Changing the policies of a service deployed on the cluster |
| </li> |
| </ul> |
| </p> |
| <p> |
| It is not mandatory to have a NodeManager in a node. In which case the cluster may be |
| used only for <a href="http://blog.afkham.org/2008/05/definition-of-high-availability.html"> |
| High Availability</a> through context replication. However, it is difficult to imagine that |
| a cluster will be deployed in production with only context replication but without cluster |
| configuration management. |
| </p> |
| <p> |
| The implementation of this interface is set by the |
| <a href="../../../../../org/apache/axis2/deployment/ClusterBuilder.html" title="class in org.apache.axis2.deployment"><code>ClusterBuilder</code></a>, by |
| reading the "configurationManager" element in the axis2.xml |
| <p/> |
| e.g. |
| <code> |
| <b> |
| <configurationManager class="org.apache.axis2.cluster.configuration.TribesConfigurationManager"> |
| </b> |
| </code> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/axis2/clustering/management/NodeManager.html#commit()">commit</a></strong>()</code> |
| <div class="block">Second phase of the 2-phase commit protocol.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/axis2/clustering/management/NodeManager.html#exceptionOccurred(java.lang.Throwable)">exceptionOccurred</a></strong>(<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> throwable)</code> |
| <div class="block">To notify other nodes that an Exception occurred, during the processing |
| of a <a href="../../../../../org/apache/axis2/clustering/management/NodeManagementCommand.html" title="class in org.apache.axis2.clustering.management"><code>NodeManagementCommand</code></a></div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/axis2/clustering/management/NodeManager.html#prepare()">prepare</a></strong>()</code> |
| <div class="block">First phase of the 2-phase commit protocol.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/axis2/clustering/management/NodeManager.html#rollback()">rollback</a></strong>()</code> |
| <div class="block">Rollback whatever was done</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/axis2/clustering/management/NodeManager.html#sendMessage(org.apache.axis2.clustering.management.NodeManagementCommand)">sendMessage</a></strong>(<a href="../../../../../org/apache/axis2/clustering/management/NodeManagementCommand.html" title="class in org.apache.axis2.clustering.management">NodeManagementCommand</a> command)</code> |
| <div class="block">Execute a NodeManagementCommand</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/axis2/clustering/management/NodeManager.html#setConfigurationContext(org.apache.axis2.context.ConfigurationContext)">setConfigurationContext</a></strong>(<a href="../../../../../org/apache/axis2/context/ConfigurationContext.html" title="class in org.apache.axis2.context">ConfigurationContext</a> configurationContext)</code> |
| <div class="block">Set the system's configuration context.</div> |
| </td> |
| </tr> |
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| <h3>Methods inherited from interface org.apache.axis2.description.<a href="../../../../../org/apache/axis2/description/ParameterInclude.html" title="interface in org.apache.axis2.description">ParameterInclude</a></h3> |
| <code><a href="../../../../../org/apache/axis2/description/ParameterInclude.html#addParameter(org.apache.axis2.description.Parameter)">addParameter</a>, <a href="../../../../../org/apache/axis2/description/ParameterInclude.html#deserializeParameters(org.apache.axiom.om.OMElement)">deserializeParameters</a>, <a href="../../../../../org/apache/axis2/description/ParameterInclude.html#getParameter(java.lang.String)">getParameter</a>, <a href="../../../../../org/apache/axis2/description/ParameterInclude.html#getParameters()">getParameters</a>, <a href="../../../../../org/apache/axis2/description/ParameterInclude.html#isParameterLocked(java.lang.String)">isParameterLocked</a>, <a href="../../../../../org/apache/axis2/description/ParameterInclude.html#removeParameter(org.apache.axis2.description.Parameter)">removeParameter</a></code></li> |
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| <h4>prepare</h4> |
| <pre>void prepare() |
| throws <a href="../../../../../org/apache/axis2/clustering/ClusteringFault.html" title="class in org.apache.axis2.clustering">ClusteringFault</a></pre> |
| <div class="block">First phase of the 2-phase commit protocol. |
| Notifies a node that it needs to prepare to switch to a new configuration.</div> |
| <dl><dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/axis2/clustering/ClusteringFault.html" title="class in org.apache.axis2.clustering">ClusteringFault</a></code> - If an error occurs while preparing to commit</dd></dl> |
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| <h4>rollback</h4> |
| <pre>void rollback() |
| throws <a href="../../../../../org/apache/axis2/clustering/ClusteringFault.html" title="class in org.apache.axis2.clustering">ClusteringFault</a></pre> |
| <div class="block">Rollback whatever was done</div> |
| <dl><dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/axis2/clustering/ClusteringFault.html" title="class in org.apache.axis2.clustering">ClusteringFault</a></code> - If an error occurs while rolling back a cluster configuration |
| transaction</dd></dl> |
| </li> |
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| <a name="commit()"> |
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| <h4>commit</h4> |
| <pre>void commit() |
| throws <a href="../../../../../org/apache/axis2/clustering/ClusteringFault.html" title="class in org.apache.axis2.clustering">ClusteringFault</a></pre> |
| <div class="block">Second phase of the 2-phase commit protocol. |
| Notifies a node that it needs to switch to a new configuration.</div> |
| <dl><dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/axis2/clustering/ClusteringFault.html" title="class in org.apache.axis2.clustering">ClusteringFault</a></code> - If an error occurs while committing a cluster configuration |
| transaction</dd></dl> |
| </li> |
| </ul> |
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| <!-- --> |
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| <h4>exceptionOccurred</h4> |
| <pre>void exceptionOccurred(<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> throwable) |
| throws <a href="../../../../../org/apache/axis2/clustering/ClusteringFault.html" title="class in org.apache.axis2.clustering">ClusteringFault</a></pre> |
| <div class="block">To notify other nodes that an Exception occurred, during the processing |
| of a <a href="../../../../../org/apache/axis2/clustering/management/NodeManagementCommand.html" title="class in org.apache.axis2.clustering.management"><code>NodeManagementCommand</code></a></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>throwable</code> - The throwable which has to be propogated to other nodes</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/axis2/clustering/ClusteringFault.html" title="class in org.apache.axis2.clustering">ClusteringFault</a></code> - If an error occurs while processing the |
| exception message</dd></dl> |
| </li> |
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| <h4>setConfigurationContext</h4> |
| <pre>void setConfigurationContext(<a href="../../../../../org/apache/axis2/context/ConfigurationContext.html" title="class in org.apache.axis2.context">ConfigurationContext</a> configurationContext)</pre> |
| <div class="block">Set the system's configuration context. This will be used by the clustering implementations |
| to get information about the Axis2 environment and to correspond with the Axis2 environment</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>configurationContext</code> - The configuration context</dd></dl> |
| </li> |
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| <h4>sendMessage</h4> |
| <pre>void sendMessage(<a href="../../../../../org/apache/axis2/clustering/management/NodeManagementCommand.html" title="class in org.apache.axis2.clustering.management">NodeManagementCommand</a> command) |
| throws <a href="../../../../../org/apache/axis2/clustering/ClusteringFault.html" title="class in org.apache.axis2.clustering">ClusteringFault</a></pre> |
| <div class="block">Execute a NodeManagementCommand</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>command</code> - The command to be executed</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/axis2/clustering/ClusteringFault.html" title="class in org.apache.axis2.clustering">ClusteringFault</a></code> - If an error occurs while sending the message</dd></dl> |
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