public class NoDeletionPolicy extends java.lang.Object implements IndexDeletionPolicy
Constructor and Description |
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NoDeletionPolicy() |
Modifier and Type | Method and Description |
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void |
onCommit(java.util.List commits)
This is called each time the writer completed a commit.
|
void |
onInit(java.util.List commits)
This is called once when a writer is first
instantiated to give the policy a chance to remove old
commit points.
|
public void onCommit(java.util.List commits) throws java.io.IOException
IndexDeletionPolicy
This is called each time the writer completed a commit. This gives the policy a chance to remove old commit points with each commit.
The policy may now choose to delete old commit points
by calling method delete()
of IndexCommit
.
If writer has autoCommit = true
then
this method will in general be called many times during
one instance of IndexWriter
. If
autoCommit = false
then this method is
only called once when IndexWriter.close()
is
called, or not at all if the IndexWriter.abort()
is called.
Note: the last CommitPoint is the most recent one, i.e. the "front index state". Be careful not to delete it, unless you know for sure what you are doing, and unless you can afford to lose the index content while doing that.
onCommit
in interface IndexDeletionPolicy
commits
- List of IndexCommit
,
sorted by age (the 0th one is the oldest commit).java.io.IOException
public void onInit(java.util.List commits) throws java.io.IOException
IndexDeletionPolicy
This is called once when a writer is first instantiated to give the policy a chance to remove old commit points.
The writer locates all index commits present in the
index directory and calls this method. The policy may
choose to delete some of the commit points, doing so by
calling method delete()
of IndexCommit
.
Note: the last CommitPoint is the most recent one, i.e. the "front index state". Be careful not to delete it, unless you know for sure what you are doing, and unless you can afford to lose the index content while doing that.
onInit
in interface IndexDeletionPolicy
commits
- List of current
point-in-time commits
,
sorted by age (the 0th one is the oldest commit).java.io.IOException
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