RE: Cache returning unexpected items.

[paulo caroli]

Matt,

I advice you to test your key comparison to ensure it is working.
For some cases you need to implement the public int hashCode() method as
well as the public boolean equals(Object obj) method.
Thanks,

Paulo


-----Original Message-----
From: Matthew Cooke [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, February 24, 2004 6:01 AM
To: Turbine JCS Users List
Subject: Re: Cache returning unexpected items.

> How are you comparing the keys?
> Thanks,
> 
> Paulo

Paulo,

Maybe that is the problem. Does the key object need to be comparable or
something?
(appologies for long post - I've tried to include most of the relevant key
related code)

Here are the important parts of the key object we use:

public class RealCacheKey implements CacheKey {
     private Collection myMultipartKey = new HashSet();

     public RealCacheKey(HttpServletRequest aServletRequest) {
         addURIParametersInto(myMultipartKey, aServletRequest);
     }

<...snip...>

     public static void addURIParametersInto(Collection aCollection, 
HttpServletRequest aRequest) {
         Enumeration names = aRequest.getParameterNames();

         while (names.hasMoreElements()) {
             String aKey = (String) names.nextElement();
             if (!isCacheBuster(aKey)) {
                 String[] values = aRequest.getParameterValues(aKey);
                 aCollection.add(new MapEntry(aKey, Arrays.asList(values)));
             }
         }
     }

     private boolean equals(RealCacheKey another) {
         return myMultipartKey.equals(another.myMultipartKey);
     }

     public boolean equals(Object another) {
         return (another instanceof CacheKey) && equals((RealCacheKey)
another);
     }
<...snip...>
}

The cachekey interface extends serializable.
The map entries are serializable and look like this:

public class MapEntry implements java.util.Map.Entry, Comparable,
Serializable {
     private static final String NULL = "null";
     private Object key;
     private Object value;

     public MapEntry(Object aKey, Object aValue) {
         super();
         this.key = (aKey == null) ? NULL : aKey;
         this.value = (aValue == null) ? NULL : aValue;
     }

<...snip...>


Cheers,
Matt.

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