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https://issues.apache.org/jira/browse/HDFS-9616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16410417#comment-16410417
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Hudson commented on HDFS-9616:
------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #13869 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/13869/])
HDFS-9616. libhdfs++: Add runtime hooks to allow a client application
(james.clampffer: rev 427edae365ab0ce77f83af942c1c9a3ee0e7efcc)
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/connection/datanodeconnection.cc
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/tests/bad_datanode_test.cc
* (add)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/include/hdfspp/events.h
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/bindings/c/hdfs.cc
* (add)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/libhdfs_events_impl.h
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/fs/filehandle.cc
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/rpc/rpc_engine.h
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/include/hdfspp/hdfs_ext.h
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/rpc/rpc_connection.cc
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/include/hdfspp/hdfspp.h
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/CMakeLists.txt
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/connection/datanodeconnection.h
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/fs/filesystem.cc
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/fs/filesystem.h
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/rpc/rpc_connection.h
* (add)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/libhdfs_events_impl.cc
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/rpc/rpc_engine.cc
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/tests/rpc_engine_test.cc
* (edit)
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/fs/filehandle.h
> libhdfs++ Add runtime hooks to allow a client application to add low level
> monitoring and tests.
> ------------------------------------------------------------------------------------------------
>
> Key: HDFS-9616
> URL: https://issues.apache.org/jira/browse/HDFS-9616
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Reporter: James Clampffer
> Assignee: Bob Hansen
> Priority: Major
> Attachments: HDFS-9616.HDFS-8707.002.patch,
> HDFS-9616.HDFS-8707.003.patch, HDFS-9616.HDFS-8707.004.patch
>
>
> It would be nice to have a set of callable objects and corresponding event
> hooks in useful places that can be set by a client application at runtime.
> This is intended to provide a scalable mechanism for implementing counters
> (#retries, #namenode requests) or application specific testing e.g. simulate
> a dropped connection when the test system running the client application
> requests.
> Current implementation plan is a struct full of callbacks (std::functions)
> owned by the FileSystemImpl. A callback could be set (or left as a no-op)
> and when the code hits the corresponding event it will be invoked with a
> reference to the object (for context) and each method argument by reference.
> The callback returns a bool: true to continue execution or false to bail out
> of the calling method.
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