JMXAccessorGetTask (Apache Tomcat 9.0.37 API Documentation)

org.apache.catalina.ant.jmx

## Class JMXAccessorGetTask

- java.lang.Object
- - org.apache.tools.ant.ProjectComponent
  - - org.apache.tools.ant.Task
    - - org.apache.catalina.ant.BaseRedirectorHelperTask
      - - org.apache.catalina.ant.jmx.JMXAccessorTask
        - - org.apache.catalina.ant.jmx.JMXAccessorGetTask

- All Implemented Interfaces:
    Cloneable

      public class JMXAccessorGetTask
      extends JMXAccessorTask

  Access JMX JSR 160 MBeans Server.
  - Get Mbeans attributes
  - Show Get result as Ant console log
  - Bind Get result as Ant properties

  Examples:
  Get an Mbean IDataSender attribute nrOfRequests and create a new ant property IDataSender.9025.nrOfRequests

         <jmx:get
                 ref="jmx.server"
                 name="Catalina:type=IDataSender,host=localhost,senderAddress=192.168.1.2,senderPort=9025"
                 attribute="nrOfRequests"
                 resultproperty="IDataSender.9025.nrOfRequests"
                 echo="false">
             />

  First call to a remote MBeanserver save the JMXConnection a referenz jmx.server

  These tasks require Ant 1.6 or later interface.
  Since:
    5.5.10
  Author:
    Peter Rossbach

- - ### Field Summary

    - ### Fields inherited from class org.apache.catalina.ant.jmx.JMXAccessorTask

      `JMX_SERVICE_PREFIX, JMX_SERVICE_SUFFIX`

    - ### Fields inherited from class org.apache.catalina.ant.BaseRedirectorHelperTask

      `alwaysLog, failOnError, redirectErrStream, redirector, redirectorConfigured, redirectorElement, redirectOutput, redirectOutStream`

    - ### Fields inherited from class org.apache.tools.ant.Task

      `target, taskName, taskType, wrapper`

    - ### Fields inherited from class org.apache.tools.ant.ProjectComponent

      `description, location, project`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JMXAccessorGetTask()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `String` | `getAttribute()`
    `String` | `jmxExecute(MBeanServerConnection jmxServerConnection)` Execute the specified command, based on the configured properties.
    `protected String` | `jmxGet(MBeanServerConnection jmxServerConnection, String name)` Get property value.
    `void` | `setAttribute(String attribute)`

    - ### Methods inherited from class org.apache.catalina.ant.jmx.JMXAccessorTask

      `accessJMXConnection, convertStringToType, createJMXConnection, createProperty, createProperty, echoResult, execute, getDelimiter, getHost, getIf, getJMXConnection, getName, getPassword, getPort, getProperty, getRef, getResultproperty, getUnless, getUrl, getUsername, isEcho, isSeparatearrayresults, isUseRef, setDelimiter, setEcho, setHost, setIf, setName, setPassword, setPort, setProperty, setRef, setResultproperty, setSeparatearrayresults, setUnless, setUrl, setUsername, testIfCondition, testUnlessCondition`

    - ### Methods inherited from class org.apache.catalina.ant.BaseRedirectorHelperTask

      `addConfiguredRedirector, closeRedirector, handleErrorFlush, handleErrorOutput, handleFlush, handleOutput, handleOutput, isFailOnError, openRedirector, setAlwaysLog, setAppend, setCreateEmptyFiles, setError, setErrorProperty, setFailonerror, setLogError, setOutput, setOutputproperty`

    - ### Methods inherited from class org.apache.tools.ant.Task

      `bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleInput, init, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType`

    - ### Methods inherited from class org.apache.tools.ant.ProjectComponent

      `clone, getDescription, getLocation, getProject, setDescription, setLocation, setProject`

    - ### Methods inherited from class java.lang.Object

      `equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### JMXAccessorGetTask

          public JMXAccessorGetTask()

  - ### Method Detail

    - #### getAttribute

          public String getAttribute()

      Returns:
        Returns the attribute.

    - #### setAttribute

          public void setAttribute(String attribute)

      Parameters:
        `attribute` - The attribute to set.

    - #### jmxExecute

          public String jmxExecute(MBeanServerConnection jmxServerConnection)
                            throws Exception

      Description copied from class: `JMXAccessorTask`
      Execute the specified command, based on the configured properties. The input stream will be closed upon completion of this task, whether it was executed successfully or not.
      Overrides:
        `jmxExecute` in class `JMXAccessorTask`
      Parameters:
        `jmxServerConnection` - The JMX connection that should be used
      Returns:
        An error message string in some situations
      Throws:
        `Exception` - if an error occurs

    - #### jmxGet

          protected String jmxGet(MBeanServerConnection jmxServerConnection,
                                  String name)
                           throws Exception

      Get property value.
      Parameters:
        `jmxServerConnection` - Connection to the JMX server
        `name` - The MBean name
      Returns:
        The error message if any
      Throws:
        `Exception` - An error occurred

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