com.thinkaurelius.titan.diskstorage.idmanagement

Class AbstractIDAuthority

java.lang.Object

com.thinkaurelius.titan.diskstorage.idmanagement.AbstractIDAuthority

All Implemented Interfaces:

IDAuthority

Direct Known Subclasses:

ConsistentKeyIDAuthority

public abstract class AbstractIDAuthority
extends Object
implements IDAuthority

Base Class for IDAuthority implementations. Handles common aspects such as maintaining the IDBlockSizer and shared configuration options

Author:

Matthias Broecheler (me@matthiasb.com)

Field Summary

Fields

Modifier and Type	Field and Description
protected static long	BASE_ID
protected Duration	idApplicationWaitMS
protected String	metricsPrefix
protected String	uid
protected byte[]	uidBytes

Constructor Summary

Constructors

Constructor and Description
AbstractIDAuthority(Configuration config)

Method Summary

Methods

Modifier and Type	Method and Description
protected long	getBlockSize(int idNamespace) Returns the block size of the specified partition as determined by the configured IDBlockSizer.
protected long	getIdUpperBound(int idNamespace)
protected StaticBuffer	getPartitionKey(int partition) Returns a byte buffer representation for the given partition id
String	getUniqueID() Return the globally unique string used by this IDAuthority instance to recognize its ID allocations and distinguish its allocations from those belonging to other IDAuthority instances.
void	setIDBlockSizer(IDBlockSizer sizer) Sets the IDBlockSizer to be used by this IDAuthority.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.thinkaurelius.titan.diskstorage.IDAuthority

close, getIDBlock, getLocalIDPartition

Field Detail

BASE_ID

protected static final long BASE_ID

See Also:

Constant Field Values

idApplicationWaitMS

protected final Duration idApplicationWaitMS

uid

protected final String uid

uidBytes

protected final byte[] uidBytes

metricsPrefix

protected final String metricsPrefix

Constructor Detail

AbstractIDAuthority

public AbstractIDAuthority(Configuration config)

Method Detail

setIDBlockSizer

public void setIDBlockSizer(IDBlockSizer sizer)

Description copied from interface: IDAuthority

Sets the IDBlockSizer to be used by this IDAuthority. The IDBlockSizer specifies the block size for each partition guaranteeing that the same partition will always be assigned the same block size.

The IDBlockSizer cannot be changed for an IDAuthority that has already been used (i.e. after invoking #getIDBlock(int).

Specified by:

setIDBlockSizer in interface IDAuthority

Parameters:

sizer - The IDBlockSizer to be used by this IDAuthority

getUniqueID

public String getUniqueID()

Description copied from interface: IDAuthority

Return the globally unique string used by this IDAuthority instance to recognize its ID allocations and distinguish its allocations from those belonging to other IDAuthority instances. This should normally be the value of GraphDatabaseConfiguration.UNIQUE_INSTANCE_ID, though that's not strictly technically necessary.

Specified by:

getUniqueID in interface IDAuthority

Returns:

unique ID string

getPartitionKey

protected StaticBuffer getPartitionKey(int partition)

Returns a byte buffer representation for the given partition id

Parameters:

partition -

Returns:

getBlockSize

protected long getBlockSize(int idNamespace)

Returns the block size of the specified partition as determined by the configured IDBlockSizer.

Parameters:

idNamespace -

Returns:

getIdUpperBound

protected long getIdUpperBound(int idNamespace)