[JBoss-dev] [JBossCache] - Re: YACL (Yet Another CacheLoader) question
"nine_mirrors" wrote : | I've checked out jboss-head and rebuilt it. Calling the cache loader is now done from the interceptor. | However, is calling TreeCache.get(Fqn) supposed to result in a call to CacheLoader.get(Fqn) if the node doesn't exist or the map empty? | Yes, because the node might have been evicted, and we need to ask the CacheLoader whether it has the node and its attrs in store. anonymous wrote : | If invoke is called with the source method GetNodeMethodLocal then load_attributes is NOT set to true. | Good question. The reason I don't load attributes here is that get(FQN) returns a Node, and is used for traversal of the tree. If you just want to traverse, then each node's attributes along the traversal will be loaded, which is bad. If you want to load attrs as well, use either preload(FQN) for a subtree, or access any key (the attrs will be loaded just-in-time then). So Node get(FQN) just loads the Node into memory, but *not* the attributes. Bela View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3857036#3857036 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3857036 --- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ ___ JBoss-Development mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-development
[JBoss-dev] [JBossCache] - Re: YACL (Yet Another CacheLoader) question
"[EMAIL PROTECTED]" wrote : This may be a bug in 1.1, but it is definitely
calling the CacheLoader in 1.2:
|public Node get(Fqn fqn) throws CacheException {
| | MethodCall m=new MethodCall(getNodeMethodLocal, new
Object[]{fqn});
| | return (Node)invokeMethod(m);
| |}
|
| The invokeMethod() passes the call through the interceptor chain, one of
the interceptors is the CacheLoader.
| Can you try with 1.2 (either from CVS head, or wait until mid December) ?
|
|
| Bela
I've checked out jboss-head and rebuilt it. Calling the cache loader is now
done from the interceptor.
However, is calling TreeCache.get(Fqn) supposed to result in a call to
CacheLoader.get(Fqn) if the node doesn't exist or the map empty?
If invoke is called with the source method GetNodeMethodLocal then
load_attributes is NOT set to true.
/Erik
ps somehthing seems to be screwed with this forum (behaviour-wise). I tried to
pm you byt that doesn't work.
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[JBoss-dev] [JBossCache] - Re: YACL (Yet Another CacheLoader) question
2 solutions if you can't wait: #1 Change the code in 1.1.1 #2 Check out 1.2 from CVS (1 bug remains to be fixed though with non-shared CacheLoaders): cd jboss-head/build build.sh cd ../cache/output/lib cp jboss-cache.jar JBOSS_HOME/server//lib View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3856873#3856873 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3856873 --- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ ___ JBoss-Development mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-development
[JBoss-dev] [JBossCache] - Re: YACL (Yet Another CacheLoader) question
"[EMAIL PROTECTED]" wrote : This may be a bug in 1.1, but it is definitely
calling the CacheLoader in 1.2:
|public Node get(Fqn fqn) throws CacheException {
| | MethodCall m=new MethodCall(getNodeMethodLocal, new
Object[]{fqn});
| | return (Node)invokeMethod(m);
| |}
|
| The invokeMethod() passes the call through the interceptor chain, one of
the interceptors is the CacheLoader.
| Can you try with 1.2 (either from CVS head, or wait until mid December) ?
|
|
| Bela
In the code I'm looking (I dl:ed jboss-3.2.7RC1 src) there is no
'getMethodNodeLocal' in TreeCache.java.
In 1.2, does the interceptor also do get() rather than just put() (as it did in
1.1)?
I don't think I can wait until december. I'll try and dl head and build it
myself.
/Erik
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[JBoss-dev] [JBossCache] - Re: YACL (Yet Another CacheLoader) question
What you can do as a workaround is:
cache.getKeys("/a/b/c");
| Node n=cache.get("/a/b/c");
then the node n will have read its attributes from the CacheLoader.
Bela
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[JBoss-dev] [JBossCache] - Re: YACL (Yet Another CacheLoader) question
BTW: once you have a Node, note that if you update it, the method calls are not intercepted, therefore all the properties provided by the interceptors (locking, cacheloading, replication etc) are not applied ! Bela View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3856833#3856833 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3856833 --- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ ___ JBoss-Development mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-development
[JBoss-dev] [JBossCache] - Re: YACL (Yet Another CacheLoader) question
This may be a bug in 1.1, but it is definitely calling the CacheLoader in 1.2:
public Node get(Fqn fqn) throws CacheException {
| MethodCall m=new MethodCall(getNodeMethodLocal, new Object[]{fqn});
| return (Node)invokeMethod(m);
|}
The invokeMethod() passes the call through the interceptor chain, one of the
interceptors is the CacheLoader.
Can you try with 1.2 (either from CVS head, or wait until mid December) ?
Bela
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[JBoss-dev] [JBossCache] - Re: YACL (Yet Another CacheLoader) question
Since my original posting was truncated, here comes the rest: it executes the n.createChild(...) but never calls the CacheLoader to get the data. Do I misunderstand what the TreeCache.get(Fqn) method is supposed to do (ie fetch the data from 2nd store if not available in the local cache)? I'm rather confused at this point. Also, looking at the TreeCache code it seems like TreeCache.get(Fqn, key) would result in calling CacheLoader.get(Fqn) which means that I could use this method instead. On the other hand this only increases my confusion. Grateful for any help Erik Svensson View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3856729#3856729 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3856729 --- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ ___ JBoss-Development mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-development
[JBoss-dev] [JBossCache] - Re: YACL (Yet Another CacheLoader) question
Is there a specific reason why my posting was truncated?
Is there something wrong with the forum code?
/Erik
"nine_mirrors" wrote : Howdy all,
|
| I'm (still) implementing a cache loader and trying to get a feel for how it
works.
| I'm wondering about TreeCache.get(Fqn). It does not seem to call
CacheLoader.get(Fqn) (which it should in my opinion).
|
| My code:
|
| TreeCache cache = new TreeCache();
| .
| .
| Node node = cache.get(new Fqn("top_node");
|
| I trace the excution to TreeCache.findNode() and to this snippet:
|
| // try CacheLoader if node is not in cache
| if(child_node == null && cache_loader != null) {
| try {
|if(cache_loader.exists(fqn)) {
| child_node=n.createChild(child_name, tmp_fqn, n,
UNINITIALIZED, null);
| notifyNodeLoaded(tmp_fqn);
|}
| }
|
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