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HBASE-16948 Fix inconsistency between HRegion and Region javadoc on getRowLock

This commit is contained in:
Michael Stack 2016-10-26 16:09:43 -07:00
parent c776b3144d
commit 8d9b9dc6b7
2 changed files with 16 additions and 18 deletions
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10
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
View File

@ -5247,16 +5247,6 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
return getRowLock(row, false);
}
/**
*
* Get a row lock for the specified row. All locks are reentrant.
*
* Before calling this function make sure that a region operation has already been
* started (the calling thread has already acquired the region-close-guard lock).
* @param row The row actions will be performed against
* @param readLock is the lock reader or writer. True indicates that a non-exlcusive
* lock is requested
*/
@Override
public RowLock getRowLock(byte[] row, boolean readLock) throws IOException {
checkRow(row, "row lock");

24
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Region.java
View File

@ -281,15 +281,23 @@ public interface Region extends ConfigurationObserver {
}
/**
* Tries to acquire a lock on the given row.
* @param waitForLock if true, will block until the lock is available.
* Otherwise, just tries to obtain the lock and returns
* false if unavailable.
* @return the row lock if acquired,
* null if waitForLock was false and the lock was not acquired
* @throws IOException if waitForLock was true and the lock could not be acquired after waiting
*
* Get a row lock for the specified row. All locks are reentrant.
*
* Before calling this function make sure that a region operation has already been
* started (the calling thread has already acquired the region-close-guard lock).
*
* NOTE: the boolean passed here has changed. It used to be a boolean that
* stated whether or not to wait on the lock. Now it is whether it an exclusive
* lock is requested.
*
* @param row The row actions will be performed against
* @param readLock is the lock reader or writer. True indicates that a non-exclusive
* lock is requested
* @see #startRegionOperation()
* @see #startRegionOperation(Operation)
*/
RowLock getRowLock(byte[] row, boolean waitForLock) throws IOException;
RowLock getRowLock(byte[] row, boolean readLock) throws IOException;
/**
* If the given list of row locks is not null, releases all locks.