Caching / Static Variables

Question

Can anyone suggest a strategy for caching the results of an expensive operation, and making them available from one invocation of a bpel process to the next?
I have a Java Embedding Task running custom code to do proprietary authentication, and I'd like to cache the results.
Any mechanism for getting a handle to something static? Any way to cache something in memory, and access it across bpel processes invocations?
thanks!
Mike

Answer 1

Here's one solution. Clearly a hack, but seems to work for now.
1- Create a java class to be your static cache:
package com.uglyhack.Cache;
import java.util.*;
public class Cache{
private static HashMap map = new HashMap();
public static synchronized void put (String key, Object val){
map.put(key, val);
public static Object get(String key){
return map.get(key);
2- Compile it, and package it up in a jar file
2a. Add jar to JDev by putting a reference to it in ProjectProperties/libraries
2b. Add class to server with Copy/Paste to OracleAS_1/bpel/system/classes/com/uglyhack/Cache.class
3- Create a Java Embedding task to store or retrieve your static vars:
String myKey=(String)getVariableData("myBpelVar1");
String myVal=(String)getVariableData("myBpelVar2");
com.uglyhack.Cache.put(myKey, myVal);
and later
String myKey=(String)getVariableData("myBpelVar1");
String cachedVal = (String)com.uglyhack.Cache.get(myKey);
setVariableData("myBpelVar2", cachedVal);
Message was edited by:
Mike_(523682)