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https://issues.apache.org/jira/browse/HBASE-18747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16204428#comment-16204428
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Hudson commented on HBASE-18747:
--------------------------------
FAILURE: Integrated in Jenkins build HBase-2.0 #682 (See
[https://builds.apache.org/job/HBase-2.0/682/])
HBASE-18747 Introduce new example and helper classes to tell CP users
(zhangduo: rev 104595137eec5cac9756eb12ed56759a001ea337)
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/compactions/TestStripeCompactionPolicy.java
* (add)
hbase-examples/src/test/java/org/apache/hadoop/hbase/coprocessor/example/TestZooKeeperScanPolicyObserver.java
* (edit) hbase-examples/pom.xml
* (edit)
hbase-examples/src/main/java/org/apache/hadoop/hbase/coprocessor/example/ZooKeeperScanPolicyObserver.java
* (edit) pom.xml
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/InternalScanner.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/compactions/TestCompactor.java
* (add)
hbase-examples/src/main/java/org/apache/hadoop/hbase/coprocessor/example/DelegatingInternalScanner.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverScannerOpenHook.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java
> Introduce new example and helper classes to tell CP users how to do filtering
> on scanners
> -----------------------------------------------------------------------------------------
>
> Key: HBASE-18747
> URL: https://issues.apache.org/jira/browse/HBASE-18747
> Project: HBase
> Issue Type: Sub-task
> Components: Coprocessors
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Critical
> Fix For: 2.0.0-alpha-4
>
> Attachments: HBASE-18747-v1.patch, HBASE-18747.patch
>
>
> Finally we decided that CP users should not have the ability to create
> {{StoreScanner}} or {{StoreFileScanner}}, so it is impossible for them to
> filter out some cells when flush or compaction by simply provide a filter
> when constructing {{StoreScanner}}.
> But I think filtering out some cells is a very important usage for CP users,
> so we need to provide the ability in another way. Theoretically it can be
> done with wrapping an {{InternalScanner}}, but I think we need to give an
> example, or even some helper classes to help CP users.
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