Finish implementing MetaStore file system abstraction layer (MetaStoreFS and
HiveMetaStoreFSImpl)
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Key: HIVE-1895
URL: https://issues.apache.org/jira/browse/HIVE-1895
Project: Hive
Issue Type: Improvement
Components: Metastore
Affects Versions: 0.7.0
Reporter: Carl Steinbach
HIVE-1881 added MetaStoreFS which is a pluggable extension point for
altering how the MetaStore interacts with the warehouse file system. This
interface needs to be extended so that it is possible to route all MetaStore
interaction with the warehouse file system through an implementation of this
interface.
{quote}
The other problem I see is that the MetaStoreFS interface that this patch added
is incomplete -
it only defines a deleteDir() method. What about createDir(), isDir(), etc? It
seems like any MetaStore
code that directly references Hadoop's FileSystem class needs to get moved into
HiveMetaStoreFsImpl.
I don't think this needs to be done right away, but the problem with waiting is
that any changes to MetaStoreFS
will break classes that implement older versions of that interface. Since
MetaStoreFS is a public API we
need to get this done before it appears in an official release.
{quote}
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