org.ops4j.store.intern

Class TemporaryStore

java.lang.Object

org.ops4j.store.intern.TemporaryStore

All Implemented Interfaces:

Store<InputStream>

public class TemporaryStore
extends Object
implements Store<InputStream>

Entity store like implementation. Stores incoming data (store) to disk at a temporary location. The handle is valid for use (load) only for this instance's lifetime. (tmp storage location) Uses an SHA-1 hash for indexing.

Field Summary

Fields

Modifier and Type	Field and Description
static String	FILENAME_PREFIX
static String	FILENAME_SUFFIX

Constructor Summary

Constructors

Constructor and Description
TemporaryStore(File folder, boolean flushStoreage)

Method Summary

Modifier and Type	Method and Description
URI	getLocation(Handle handle) Fixed location for a resource that has been stored before.
String	hash(InputStream is, OutputStream storeHere)
InputStream	load(Handle handle) Load a T after (successfully) stored it before.
Handle	store(InputStream inp) Read incoming object of type T (for example an InputSteam)

Methods inherited from class java.lang.Object

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

Field Detail

FILENAME_PREFIX

public static final String FILENAME_PREFIX

See Also:

Constant Field Values

FILENAME_SUFFIX

public static final String FILENAME_SUFFIX

See Also:

Constant Field Values

Constructor Detail

TemporaryStore

public TemporaryStore(File folder,
                      boolean flushStoreage)

Method Detail

store

public Handle store(InputStream inp)
             throws IOException

Description copied from interface: Store

Read incoming object of type T (for example an InputSteam)

Specified by:

store in interface Store<InputStream>

Parameters:

inp - object to be stored. Implementations are usually bound to a certain T

Returns:

handle that can be shared. Validity of this handle may be different from implementation to implementation.

Throws:

IOException - in case incoming object cannot be read (if it involves IO)

load

public InputStream load(Handle handle)
                 throws IOException

Description copied from interface: Store

Load a T after (successfully) stored it before.

Specified by:

load in interface Store<InputStream>

Parameters:

handle - identifier that has been returned from a previous srore call.

Returns:

instance of type T that has been stored before.

Throws:

IOException - if loading resource involves IO, things can always go wrong.

getLocation

public URI getLocation(Handle handle)
                throws IOException

Description copied from interface: Store

Fixed location for a resource that has been stored before. Beware, not all BinaryStore implementations may have such thing. Tinybundles.Store is made for programs, not as an end-user library. If possible, use the BinaryHandle you get from store(..) operations. This also gives implementations of this interface greatest freedom and keeps you apps backend independent.

Specified by:

getLocation in interface Store<InputStream>

Parameters:

handle - must refer to a previously stored object.

Returns:

location that is equivalent to the given handle. If possible.

Throws:

IOException - if IO is involved, things may go mad.

hash

public String hash(InputStream is,
                   OutputStream storeHere)
            throws IOException

Throws:

IOException