Hi,
I am a Lucene user and I have a few questions about Lucene filters.
I appreciate it if someone can shed light on this.
1. Is Lucene filters such as TermsFilter thread-safe in general?
The semantics of a Filter is fixed, unless a filter maintains some
private state information, theoretically it could be thread-safe and
the same Filter can be used by multiple queries at the same time.
2. Does Lucene has a global Caching mechanism for filters or even
queries? Or a user has to manage them by himself?
It probably can better use resource if the cached filters/queries
are managed at a central place. I noticed FilterManager was removed
from Lucene 4. Is there another class replacing FilterManager?
Thanks!
Wei
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