CacheLoader asyncReloading

[micha...@gmail.com]

Is there any code example that is using the method CacheLoader.asyncReloading, to be used for asynchronous loading/refreshing for cache entries.

Basically, I want to use CacheBuilder along with the CacheLoader to load entries to the cache asynchronously without blocking, then at the time of successful load/refresh, I want to do some logic in the callback.

Here is a code I'm using, http://pastebin.com/bwG6eZ7F , The problem is that the 4 sequential calls

1. cache.refresh("x1");
2. cache.refresh("x2");
3. cache.refresh("x3");
4. cache.refresh("x4");

are blocking.

I'm using Guava 17.0, Java 7

Thanks in advance.

[Louis Wasserman]

The issue here is that you're calling refresh on an empty cache.  CacheLoader.reload gets called when there's a preexisting entry for the key being requested, but the normal CacheLoader.load has to get called if the key wasn't already in the cache.

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Louis Wasserman

[micha...@gmail.com]

Ok. That's the case for refreshing, but, how to load values in the cache asynchronously, and after successful loading invoke logic on the value in a callback.

[Louis Wasserman]

I think the honest answer has to be to do the asynchronous loading yourself: submit a task to an Executor that calls cache.load.

To view this discussion on the web visit https://groups.google.com/d/msgid/guava-discuss/e657b23d-0ec2-44ee-8cb1-fad55835050e%40googlegroups.com.

For more options, visit https://groups.google.com/d/optout.

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Louis Wasserman