org.apache.storm.hdfs.blobstore

Class HdfsClientBlobStore

java.lang.Object

org.apache.storm.blobstore.ClientBlobStore

org.apache.storm.hdfs.blobstore.HdfsClientBlobStore

All Implemented Interfaces:

Shutdownable

public class HdfsClientBlobStore
extends ClientBlobStore

Client to access the HDFS blobStore. At this point, this is meant to only be used by the supervisor. Don’t trust who the client says they are so pass null for all Subjects.

The HdfsBlobStore implementation takes care of the null Subjects. It assigns Subjects based on what hadoop says who the users are. These users must be configured accordingly in the SUPERVISOR_ADMINS for ACL validation and for the supervisors to download the blobs. This API is only used by the supervisor in order to talk directly to HDFS.

Field Summary

Fields inherited from class org.apache.storm.blobstore.ClientBlobStore

conf

Constructor Summary

Constructors

Constructor and Description
HdfsClientBlobStore()

Method Summary

Modifier and Type	Method and Description
AtomicOutputStream	createBlobToExtend(String key, SettableBlobMeta meta)
void	createStateInZookeeper(String key)
void	deleteBlob(String key)
InputStreamWithMeta	getBlob(String key)
ReadableBlobMeta	getBlobMeta(String key)
int	getBlobReplication(String key)
Iterator<String>	listKeys()
void	prepare(Map conf)
void	setBlobMetaToExtend(String key, SettableBlobMeta meta)
boolean	setClient(Map conf, NimbusClient client)
void	shutdown()
AtomicOutputStream	updateBlob(String key)
int	updateBlobReplication(String key, int replication)

Methods inherited from class org.apache.storm.blobstore.ClientBlobStore

createBlob, setBlobMeta

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HdfsClientBlobStore

public HdfsClientBlobStore()

Method Detail

prepare

public void prepare(Map conf)

Specified by:

prepare in class ClientBlobStore

createBlobToExtend

public AtomicOutputStream createBlobToExtend(String key,
                                             SettableBlobMeta meta)
                                      throws AuthorizationException,
                                             KeyAlreadyExistsException

Specified by:

createBlobToExtend in class ClientBlobStore

Throws:

AuthorizationException

KeyAlreadyExistsException

updateBlob

public AtomicOutputStream updateBlob(String key)
                              throws AuthorizationException,
                                     KeyNotFoundException

Specified by:

updateBlob in class ClientBlobStore

Throws:

AuthorizationException

KeyNotFoundException

getBlobMeta

public ReadableBlobMeta getBlobMeta(String key)
                             throws AuthorizationException,
                                    KeyNotFoundException

Specified by:

getBlobMeta in class ClientBlobStore

Throws:

AuthorizationException

KeyNotFoundException

setBlobMetaToExtend

public void setBlobMetaToExtend(String key,
                                SettableBlobMeta meta)
                         throws AuthorizationException,
                                KeyNotFoundException

Specified by:

setBlobMetaToExtend in class ClientBlobStore

Throws:

AuthorizationException

KeyNotFoundException

deleteBlob

public void deleteBlob(String key)
                throws AuthorizationException,
                       KeyNotFoundException

Specified by:

deleteBlob in class ClientBlobStore

Throws:

AuthorizationException

KeyNotFoundException

getBlob

public InputStreamWithMeta getBlob(String key)
                            throws AuthorizationException,
                                   KeyNotFoundException

Specified by:

getBlob in class ClientBlobStore

Throws:

AuthorizationException

KeyNotFoundException

listKeys

public Iterator<String> listKeys()

Specified by:

listKeys in class ClientBlobStore

getBlobReplication

public int getBlobReplication(String key)
                       throws AuthorizationException,
                              KeyNotFoundException

Specified by:

getBlobReplication in class ClientBlobStore

Throws:

AuthorizationException

KeyNotFoundException

updateBlobReplication

public int updateBlobReplication(String key,
                                 int replication)
                          throws AuthorizationException,
                                 KeyNotFoundException

Specified by:

updateBlobReplication in class ClientBlobStore

Throws:

AuthorizationException

KeyNotFoundException

setClient

public boolean setClient(Map conf,
                         NimbusClient client)

Specified by:

setClient in class ClientBlobStore

createStateInZookeeper

public void createStateInZookeeper(String key)

Specified by:

createStateInZookeeper in class ClientBlobStore

shutdown

public void shutdown()