public final class ReaderManager extends ReferenceManager<DirectoryReader>
DirectoryReader
instances across
multiple threads, while periodically reopening. This class ensures each
reader is closed only once all threads have finished using it.SearcherManager
ReferenceManager.RefreshListener
current
Constructor and Description |
---|
ReaderManager(Directory dir)
Creates and returns a new ReaderManager from the given
Directory . |
ReaderManager(IndexWriter writer,
boolean applyAllDeletes)
Creates and returns a new ReaderManager from the given
IndexWriter . |
Modifier and Type | Method and Description |
---|---|
protected void |
decRef(DirectoryReader reference)
Decrement reference counting on the given reference.
|
protected int |
getRefCount(DirectoryReader reference)
Returns the current reference count of the given reference.
|
protected DirectoryReader |
refreshIfNeeded(DirectoryReader referenceToRefresh)
Refresh the given reference if needed.
|
protected boolean |
tryIncRef(DirectoryReader reference)
Try to increment reference counting on the given reference.
|
acquire, addListener, afterClose, afterMaybeRefresh, close, maybeRefresh, maybeRefreshBlocking, release, removeListener
public ReaderManager(IndexWriter writer, boolean applyAllDeletes) throws IOException
IndexWriter
.writer
- the IndexWriter to open the IndexReader from.applyAllDeletes
- If true
, all buffered deletes will be applied (made
visible) in the IndexSearcher
/ DirectoryReader
.
If false
, the deletes may or may not be applied, but
remain buffered (in IndexWriter) so that they will be applied in
the future. Applying deletes can be costly, so if your app can
tolerate deleted documents being returned you might gain some
performance by passing false
. See
DirectoryReader.openIfChanged(DirectoryReader, IndexWriter, boolean)
.IOException
- If there is a low-level I/O errorpublic ReaderManager(Directory dir) throws IOException
Directory
.dir
- the directory to open the DirectoryReader on.IOException
- If there is a low-level I/O errorprotected void decRef(DirectoryReader reference) throws IOException
ReferenceManager
decRef
in class ReferenceManager<DirectoryReader>
IOException
- if reference decrement on the given resource failed.protected DirectoryReader refreshIfNeeded(DirectoryReader referenceToRefresh) throws IOException
ReferenceManager
null
if no refresh
was needed, otherwise a new refreshed reference.refreshIfNeeded
in class ReferenceManager<DirectoryReader>
IOException
- if the refresh operation failedprotected boolean tryIncRef(DirectoryReader reference)
ReferenceManager
tryIncRef
in class ReferenceManager<DirectoryReader>
protected int getRefCount(DirectoryReader reference)
ReferenceManager
getRefCount
in class ReferenceManager<DirectoryReader>
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