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.
  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private int
     
    private javax.servlet.jsp.tagext.JspTag[]
     
    static final String
     
    static final String
     
     
  • Constructor Summary

    Constructors
    Constructor
    Description
    Constructs a tag handler pool with the default capacity.
    TagHandlerPool(int capacity)
    Deprecated.
    Use static getTagHandlerPool
  • Method Summary

    Modifier and Type
    Method
    Description
    <T extends javax.servlet.jsp.tagext.JspTag>
    javax.servlet.jsp.tagext.JspTag
    get(Class<T> 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(javax.servlet.ServletConfig config, String name, String defaultV)
     
    getTagHandlerPool(javax.servlet.ServletConfig config)
     
    protected void
    init(javax.servlet.ServletConfig config)
     
    void
    Calls the release() method of all available tag handlers in this tag handler pool.
    void
    reuse(javax.servlet.jsp.tagext.JspTag 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

  • Constructor Details

    • TagHandlerPool

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

      public TagHandlerPool(int capacity)
      Deprecated.
      Use static getTagHandlerPool
      Constructs a tag handler pool with the given capacity.
      Parameters:
      capacity - Tag handler pool capacity
  • Method Details

    • getTagHandlerPool

      public static TagHandlerPool getTagHandlerPool(javax.servlet.ServletConfig config)
    • init

      protected void init(javax.servlet.ServletConfig config)
    • get

      public <T extends javax.servlet.jsp.tagext.JspTag> javax.servlet.jsp.tagext.JspTag get(Class<T> handlerClass) throws javax.servlet.jsp.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:
      javax.servlet.jsp.JspException - if a tag handler cannot be instantiated
    • reuse

      public void reuse(javax.servlet.jsp.tagext.JspTag 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 - JspTag 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(javax.servlet.ServletConfig config, String name, String defaultV)