TagHandlerPool (Apache Tomcat 9.0.102 API Documentation)
Description: declaration: package: org.apache.jasper.runtime, class: TagHandlerPool

Package org.apache.jasper.runtime

# Class TagHandlerPool

java.lang.Object
org.apache.jasper.runtime.TagHandlerPool

public class TagHandlerPool extends Object
Pool of tag handlers that can be reused.

Author:
  Jan Luehe

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected InstanceManager`
  `instanceManager`
  `static final String`
  `OPTION_MAXSIZE`
  `static final String`
  `OPTION_TAGPOOL`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `TagHandlerPool()`
  Constructs a tag handler pool with the default capacity.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `Tag`
  `get(Class<? extends Tag> handlerClass)`
  Gets the next available tag handler from this tag handler pool, instantiating one if this tag handler pool is empty.
  `protected static String`
  `getOption(ServletConfig config, String name, String defaultV)`
  `static TagHandlerPool`
  `getTagHandlerPool(ServletConfig config)`
  `protected void`
  `init(ServletConfig config)`
  `void`
  `release()`
  Calls the release() method of all available tag handlers in this tag handler pool.
  `void`
  `reuse(Tag handler)`
  Adds the given tag handler to this tag handler pool, unless this tag handler pool has already reached its capacity, in which case the tag handler's release() method is called.

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

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

- ## Field Details

  - ### OPTION_TAGPOOL

    public static final String OPTION_TAGPOOL
    See Also:
      - Constant Field Values

  - ### OPTION_MAXSIZE

    public static final String OPTION_MAXSIZE
    See Also:
      - Constant Field Values

  - ### instanceManager

    protected InstanceManager instanceManager

- ## Constructor Details

  - ### TagHandlerPool

    public TagHandlerPool()
    Constructs a tag handler pool with the default capacity.

- ## Method Details

  - ### getTagHandlerPool

    public static TagHandlerPool getTagHandlerPool(ServletConfig config)

  - ### init

    protected void init(ServletConfig config)

  - ### get

    public Tag get(Class<? extends Tag> handlerClass) throws JspException
    Gets the next available tag handler from this tag handler pool, instantiating one if this tag handler pool is empty.
    Parameters:
      `handlerClass` - Tag handler class
    Returns:
      Reused or newly instantiated tag handler
    Throws:
      `JspException` - if a tag handler cannot be instantiated

  - ### reuse

    public void reuse(Tag handler)
    Adds the given tag handler to this tag handler pool, unless this tag handler pool has already reached its capacity, in which case the tag handler's release() method is called.
    Parameters:
      `handler` - Tag handler to add to this tag handler pool

  - ### release

    public void release()
    Calls the release() method of all available tag handlers in this tag handler pool.

  - ### getOption

    protected static String getOption(ServletConfig config, String name, String defaultV)