LifecycleListenerRule (Apache Tomcat 11.0.22 API Documentation)
Description: declaration: package: org.apache.catalina.startup, class: LifecycleListenerRule

# Class LifecycleListenerRule

java.lang.Object
org.apache.tomcat.util.digester.Rule
org.apache.catalina.startup.LifecycleListenerRule

public class LifecycleListenerRule extends Rule
Rule that creates a new `LifecycleListener` and associates it with the top object on the stack which must implement `Container`. The implementation class to be used is determined by:

1. Does the top element on the stack specify an implementation class using the attribute specified when this rule was created?
2. Does the parent `Container` of the `Container` on the top of the stack specify an implementation class using the attribute specified when this rule was created?
3. Use the default implementation class specified when this rule was created.

- ## Field Summary

  ### Fields inherited from class Rule

  `digester, namespaceURI, sm`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `LifecycleListenerRule(String listenerClass, String attributeName)`
  Construct a new instance of this Rule.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `begin(String namespace, String name, Attributes attributes)`
  This method is called when the beginning of a matching XML element is encountered.

  ### Methods inherited from class Rule

  `body, end, finish, getDigester, getNamespaceURI, setDigester, setNamespaceURI`

  ### Methods inherited from class Object

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

- ## Constructor Details

  - ### LifecycleListenerRule

    public LifecycleListenerRule(String listenerClass, String attributeName)
    Construct a new instance of this Rule.
    Parameters:
      `listenerClass` - Default name of the LifecycleListener implementation class to be created
      `attributeName` - Name of the attribute that optionally includes an override name of the LifecycleListener class

- ## Method Details

  - ### begin

    public void begin(String namespace, String name, Attributes attributes) throws Exception
    Description copied from class: `Rule`
    This method is called when the beginning of a matching XML element is encountered. The default implementation is a NO-OP.
    Overrides:
      `begin` in class `Rule`
    Parameters:
      `namespace` - the namespace URI of the matching element, or an empty string if the parser is not namespace aware or the element has no namespace
      `name` - the local name if the parser is namespace aware, or just the element name otherwise
      `attributes` - The attribute list of this element
    Throws:
      `Exception` - if an error occurs while processing the event