Package org.apache.jackrabbit.oak.spi.blob

Class AbstractSharedBackend

java.lang.Object

org.apache.jackrabbit.oak.spi.blob.AbstractSharedBackend

All Implemented Interfaces:

SharedBackend

Direct Known Subclasses:

FSBackend

public abstract class AbstractSharedBackend
extends Object
implements SharedBackend

Constructor Summary

Constructors

Constructor	Description
AbstractSharedBackend()

Method Summary

Modifier and Type	Method	Description
byte[]	getOrCreateReferenceKey()	Returns the reference key of this backend.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jackrabbit.oak.spi.blob.SharedBackend

addMetadataRecord, addMetadataRecord, close, deleteAllMetadataRecords, deleteMetadataRecord, deleteRecord, exists, getAllIdentifiers, getAllMetadataRecords, getAllRecords, getMetadataRecord, getRecord, init, metadataRecordExists, read, write

Constructor Details

AbstractSharedBackend

public AbstractSharedBackend()

Method Details

getOrCreateReferenceKey

public byte[] getOrCreateReferenceKey()
                               throws DataStoreException

Returns the reference key of this backend. If one does not already exist, it is automatically created in an implementation-specific way. The default implementation simply creates a temporary random key that's valid only until the data store gets restarted. Subclasses can override and/or decorate this method to support a more persistent reference key.

This method is called only once during the lifetime of a backend instance and the return value is cached in memory, so it's no problem if the implementation is slow.

Returns:

reference key

Throws:

DataStoreException - if the key is not available