org.apache.jasper.runtime
Class TagHandlerPoolImpl
java.lang.Object
|
+--org.apache.jasper.runtime.TagHandlerPoolImpl
- All Implemented Interfaces:
- TagHandlerPool
- public class TagHandlerPoolImpl
- extends java.lang.Object
- implements TagHandlerPool
This class provides a basic implementation of TagHandlerPool.
Its pooling strategy is to grow the pool so that a caller
never has to wait for a tag handler. Therefore in the worst
case, the pool size will be equal to the total number of
concurently used tags (that are at the same reuse scope.) This
implementation does not shrink the pool.
- Author:
- Casey Lucas
- See Also:
TagPoolManagerImpl
Constructor Summary |
TagHandlerPoolImpl(java.lang.Class handlerClass,
java.lang.String poolName)
Create a TagHandlerPoolImpl that will store objects of the given
class type |
Method Summary |
javax.servlet.jsp.tagext.Tag |
getHandler()
Obtain a tag handler. |
void |
releaseHandler(javax.servlet.jsp.tagext.Tag usedTag,
boolean removeFromPool)
This method releases a tag handler obtained from getHandler. |
void |
shutdown()
This method performs pool shutdown. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
TagHandlerPoolImpl
public TagHandlerPoolImpl(java.lang.Class handlerClass,
java.lang.String poolName)
- Create a TagHandlerPoolImpl that will store objects of the given
class type
- Parameters:
handlerClass
- tag handler class
getHandler
public javax.servlet.jsp.tagext.Tag getHandler()
- Obtain a tag handler. This implementation allocates one if one
is not available. So the collection will grow with concurent
tag handler use.
- Specified by:
getHandler
in interface TagHandlerPool
- Returns:
- tag handler
releaseHandler
public void releaseHandler(javax.servlet.jsp.tagext.Tag usedTag,
boolean removeFromPool)
- This method releases a tag handler obtained from getHandler.
The JSP shouls always call this method after finished using a
tag handler.
- Specified by:
releaseHandler
in interface TagHandlerPool
- Parameters:
usedTag
- tag previously obtained from getHandlerremoveFromPool
- Set to true to remove handler from pool. One reason for this
is an exception during tag processing.
shutdown
public void shutdown()
- This method performs pool shutdown. It will call Tag.release
for all of its tag handlers.
- Specified by:
shutdown
in interface TagHandlerPool
Copyright © 2001 Apache Software Foundation. All Rights Reserved.