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https://issues.apache.org/jira/browse/HBASE-19001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16209023#comment-16209023
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Hudson commented on HBASE-19001:
--------------------------------
FAILURE: Integrated in Jenkins build HBase-Trunk_matrix #3908 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/3908/])
HBASE-19001 Remove the hooks in RegionObserver which are designed to (zhangduo:
rev e804dd0b600f898f7519dee7134b68ad04c20a9a)
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestCoprocessorScanPolicy.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Region.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlusher.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedStoreScanner.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HMobStore.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverScannerOpenHook.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/NoOpScanPolicyObserver.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStore.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/Compactor.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/SimpleRegionObserver.java
* (add)
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSideScanExcpetionWithCoprocessor.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionObserver.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAvoidCellReferencesIntoShippedBlocks.java
* (add)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/DelegatingInternalScanner.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
* (add)
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSideScanExcpetion.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java
> Remove the hooks in RegionObserver which are designed to construct a
> StoreScanner which is marked as IA.Private
> ---------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-19001
> URL: https://issues.apache.org/jira/browse/HBASE-19001
> Project: HBase
> Issue Type: Sub-task
> Components: Coprocessors
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Fix For: 2.0.0-alpha-4
>
> Attachments: HBASE-19001-v1.patch, HBASE-19001-v2.patch,
> HBASE-19001.patch
>
>
> There are three methods here
> {code}
> KeyValueScanner
> preStoreScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
> Store store, Scan scan, NavigableSet<byte[]> targetCols,
> KeyValueScanner s, long readPt)
> throws IOException;
> InternalScanner
> preFlushScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
> Store store, List<KeyValueScanner> scanners, InternalScanner s, long
> readPoint)
> throws IOException;
> InternalScanner
> preCompactScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
> Store store, List<? extends KeyValueScanner> scanners, ScanType
> scanType, long earliestPutTs,
> InternalScanner s, CompactionLifeCycleTracker tracker,
> CompactionRequest request,
> long readPoint) throws IOException;
> {code}
> For the flush and compact ones, we've discussed many times, it is not safe to
> let user inject a Filter or even implement their own InternalScanner using
> the store file scanners, as our correctness highly depends on the complicated
> logic in SQM and StoreScanner. CP users are expected to wrap the original
> InternalScanner(it is a StoreScanner anyway) in preFlush/preCompact methods
> to do filtering or something else.
> For preStoreScannerOpen it even returns a KeyValueScanner which is marked as
> IA.Private... This is less hurt but still, we've decided to not expose
> StoreScanner to CP users so here this method is useless. CP users can use
> preGetOp and preScannerOpen method to modify the Get/Scan object passed in to
> inject into the scan operation.
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