Package org.apache.storm.blobstore

Class FileBlobStoreImpl

java.lang.Object

org.apache.storm.blobstore.FileBlobStoreImpl

public class FileBlobStoreImpl
extends Object

Very basic blob store impl with no ACL handling.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	FileBlobStoreImpl.KeyInHashDirIterator

Constructor Summary

Constructors

Constructor	Description
FileBlobStoreImpl(File path, Map<String,Object> conf)

Method Summary

Modifier and Type	Method	Description
protected void	delete(File path)
void	deleteKey(String key)	Delete a key from the blob store.
boolean	exists(String key)	Check if the key exists in the blob store.
void	fullCleanup(long age)
protected Iterator<LocalFsBlobStoreFile>	listBlobStoreFiles(File path)
Iterator<String>	listKeys()	List keys.
protected Iterator<String>	listKeys(File path)
LocalFsBlobStoreFile	read(String key)	Get an input stream for reading a part.
void	shutdown()
LocalFsBlobStoreFile	write(String key, boolean create)	Get an object tied to writing the data.

Methods inherited from class java.lang.Object

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

Constructor Details

FileBlobStoreImpl

public FileBlobStoreImpl(File path,
 Map<String,Object> conf)
                  throws IOException

Throws:

IOException

Method Details

listKeys

public Iterator<String> listKeys()
                          throws IOException

List keys.

Returns:

all keys that are available for reading

Throws:

IOException - on any error

listKeys

protected Iterator<String> listKeys(File path)
                             throws IOException

Throws:

IOException

read

public LocalFsBlobStoreFile read(String key)
                          throws IOException

Get an input stream for reading a part.

Parameters:

key - the key of the part to read.

Returns:

the where to read the data from.

Throws:

IOException - on any error

write

public LocalFsBlobStoreFile write(String key,
 boolean create)
                           throws IOException

Get an object tied to writing the data.

Parameters:

key - the key of the part to write to.

Returns:

an object that can be used to both write to, but also commit/cancel the operation.

Throws:

IOException - on any error

exists

public boolean exists(String key)

Check if the key exists in the blob store.

Parameters:

key - the key to check for

Returns:

true if it exists else false.

deleteKey

public void deleteKey(String key)
               throws IOException

Delete a key from the blob store.

Parameters:

key - the key to delete

Throws:

IOException - on any error

fullCleanup

public void fullCleanup(long age)
                 throws IOException

Throws:

IOException

listBlobStoreFiles

protected Iterator<LocalFsBlobStoreFile> listBlobStoreFiles(File path)
                                                     throws IOException

Throws:

IOException

delete

protected void delete(File path)
               throws IOException

Throws:

IOException

shutdown

public void shutdown()