Cache destroy and removing objects based on filter

Hi,
I have lined up a few questions to understand the ways we can destroy/remove cache entries or cache itself on a collective basis and not just the cache.remove(key).
1. How do I remove a group of keys from the cache? Say either I know the keySet or a keySet obtained based on a filter. I can see the Java doc says namedCache also implements queryMap and that supports keySet(Filter) but unlike Map.keySet(), the set returned by this method may not be backed by the map, so changed to the set may not be reflected in the map.
http://download.oracle.com/otn_hosted_doc/coherence/353/com/tangosol/util/QueryMap.html#keySet(com.tangosol.util.Filter)
Now that also means cache.keySet().removeAll() may not work. Can we confirm that, as another article http://wiki.tangosol.com/display/COH35UG/Data+Affinity shows an example way to use entryset or keyset and shows this line:
cacheLineItems.keySet().removeAll(setLineItemKeys).
2. Is namedcache.destroy() a blocking or non-blocking? Coz in one of our tests, we created a for loop of the following code:
     a. create cache.
     b. use cache.
     c. destroy cache.
And we expected at any point of time to have only one cache to be active on the cluster, however with the 500M as the high unit, we never saw evictions and indeed saw out of memory error. We had like 100 iterations. We expected destroy cache to basically delete the cache, thereby freeing the memory on the JVM. We only had one proxy and one storage in our test.
3. Is namedcache.clear() a blocking or non-blocking call? Although this does not necessarily removes the cache, it only unmaps all the entries in the cache.

Hi,
You can remove multiple cache entries based on a filter like this...
Filter filter = ...
cache.invokeAll(filter, new ConditionalRemove(AlwaysFilter.INSTANCE));...or on a collection of keys like this...
Collection keys = ...
cache.invokeAll(keys, new ConditionalRemove(AlwaysFilter.INSTANCE));Regarding non-blocking calls, presumably for clear() I would think that the call will not return until the cache is cleared (i.e. empty) otherwise you would get all sorts of potential problems. For cache.destroy() I am not sure what state the cache will be in when the call returns. I suspect if you call this from a client it only destroys the cache locally on that client and not throughout the rest of the cluste though - but I am sure someone could confirm this.
JK

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Hello, all!
First of all, I guess very strange see interface collection with
add(E) and remove(Object)... Why is there such collision?
LinkedList<String> list = new LinkedList<String>();
Object o = null;
list.remove(o);NetBeans shows a warning for the last line: Expected type String, actual type Object.
Eclipse and java compiler do not point to it. So how can I understand this? Netbeans fixed remove(Object) to remove(E)?
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mfratto wrote:
The only warning I get in netbeans is to assign the return value, a boolean, to a new variable.I use netbeans 6.7. Probably, You use another version of netbeans from me, so you do not get the same warning.
[see screenshort of the netbeans warning|http://i055.radikal.ru/0907/b2/6203e7e22d79.jpg]
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Object-Based Navigation (OBN)is the portalavigation scenerio. the navigation targets are defined by operations of a business object.
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http://help.sap.com/saphelp_erp2004/helpdata/en/3e/97e33d7f9c47af85a2543e3a2cce4c/content.htm
WebdynPro ABAP:
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http://www.urz.uni-heidelberg.de/saphelp/helpdata/DE/dd/f8dd7995ac4100adc9af417e044063/content.htm
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Hi there,
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Oracle JDBC drivers cache array and structure descriptors. This provides enormous performance benefits. However, it means that if you change the underlying type definition of a structure type in the database, the cached descriptor for that structure type will become stale and your application will receive a SQLException exception.http://download.oracle.com/docs/cd/B28359_01/java.111/b31224/oraoot.htm#g1104293
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>
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Cache destroy and removing objects based on filter

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