com.groiss.ds
Class RingBuffer

java.lang.Object
  com.groiss.ds.RingBuffer

public class RingBuffer
extends java.lang.Object

ring buffer for caching the objects the maximum size is provided by removing the oldest element

Constructor Summary

RingBuffer(int size, long timeout)

Method Summary

void	clear()
void	emptyCache(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res)
java.lang.Object	get(java.lang.String key) return the bufferd element with the appropriate key; null, if no element is bufferd with the key
void	put(java.lang.Object element, java.lang.String key) inserts an object into the ring buffer.
void	showBuffer(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res)

Methods inherited from class java.lang.Object

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

Constructor Detail

RingBuffer

public RingBuffer(int size,
                  long timeout)

Method Detail

put

public void put(java.lang.Object element,
                java.lang.String key)

inserts an object into the ring buffer. if the buffer is full, the oldest element is removed oldest element: the element, that was referred by put() or get() the longest time ago

Parameters:

element - an element to be cached

key - the key for the cached element

get

public java.lang.Object get(java.lang.String key)

return the bufferd element with the appropriate key; null, if no element is bufferd with the key

clear

public void clear()

showBuffer

public void showBuffer(javax.servlet.http.HttpServletRequest req,
                       javax.servlet.http.HttpServletResponse res)
                throws java.lang.Exception

Throws:

java.lang.Exception

emptyCache

public void emptyCache(javax.servlet.http.HttpServletRequest req,
                       javax.servlet.http.HttpServletResponse res)
                throws java.lang.Exception

Throws:

java.lang.Exception