org.apache.jasper.runtime
Class TagHandlerPool

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

Direct Known Subclasses:

PerThreadTagHandlerPool

public class TagHandlerPool
extends Object

Pool of tag handlers that can be reused.

Author:

Jan Luehe

Field Summary

protected InstanceManager	instanceManager
static String	OPTION_MAXSIZE
static String	OPTION_TAGPOOL

Constructor Summary

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

Method Summary

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 Detail

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 Detail

TagHandlerPool

public TagHandlerPool()

Constructs a tag handler pool with the default capacity.

Method Detail

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)