io.inbot.xmltools

Class XPathExpressionCache

java.lang.Object

io.inbot.xmltools.XPathExpressionCache

public class XPathExpressionCache
extends Object

Per thread caching of xpath expressions. Compiling expressions is way more expensive than reusing them. Unfortunately, they are not thread safe. So this class provides a per thread cache of XPathExpression. The thread cache uses the thread ids for storing the per thread expresssion cache. Each expression is stored with the uncompiled string as its key.

Constructor Summary

Constructors

Constructor and Description
XPathExpressionCache(int threadCacheSize, int threadCacheExpireMinutes, int cacheSize, int evictionOfUnusedInMinutes)

Method Summary

Modifier and Type	Method and Description
XPathExpression	getExpression(String expression)

Methods inherited from class java.lang.Object

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

Constructor Detail

XPathExpressionCache

public XPathExpressionCache(int threadCacheSize,
                            int threadCacheExpireMinutes,
                            int cacheSize,
                            int evictionOfUnusedInMinutes)

Method Detail

getExpression

public XPathExpression getExpression(String expression)
                              throws XPathExpressionException

Throws:

XPathExpressionException