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
static final String	OPTION_USEIMFORTAGS
protected boolean	useInstanceManagerForTags

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

OPTION_USEIMFORTAGS

public static final String OPTION_USEIMFORTAGS

See Also:

• Constant Field Values

instanceManager

protected InstanceManager instanceManager

useInstanceManagerForTags

protected boolean useInstanceManagerForTags

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)