com.graphhopper.routing.subnetwork

Class SubnetworkStorage

java.lang.Object

com.graphhopper.routing.subnetwork.SubnetworkStorage

All Implemented Interfaces:

Storable<SubnetworkStorage>, Closeable, AutoCloseable

public class SubnetworkStorage
extends Object
implements Storable<SubnetworkStorage>

This class handles storage of subnetwork ids for every node. Useful to pick the correct set of landmarks or fail fast for routing when two nodes are from different subnetworks.

Author:

Peter Karich

Constructor Summary

Constructors

Constructor and Description
SubnetworkStorage(Directory dir, String postfix)

Method Summary

Modifier and Type	Method and Description
void	close() This method makes sure that the underlying used resources are released.
SubnetworkStorage	create(long byteCount) Creates the underlying storage.
void	flush() This method makes sure that the underlying data is written to the storage.
long	getCapacity()
int	getSubnetwork(int nodeId) Returns the subnetwork ID for the specified nodeId or 0 if non is associated e.g.
boolean	isClosed()
boolean	loadExisting()
void	setSubnetwork(int nodeId, int subnetwork) This method sets the subnetwork if of the specified nodeId.

Methods inherited from class java.lang.Object

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

Constructor Detail

SubnetworkStorage

public SubnetworkStorage(Directory dir,
                         String postfix)

Method Detail

getSubnetwork

public int getSubnetwork(int nodeId)

Returns the subnetwork ID for the specified nodeId or 0 if non is associated e.g. because the subnetwork is too small.

setSubnetwork

public void setSubnetwork(int nodeId,
                          int subnetwork)

This method sets the subnetwork if of the specified nodeId. Default is 0 and means subnetwork was too small to be useful to be stored.

loadExisting

public boolean loadExisting()

Specified by:

loadExisting in interface Storable<SubnetworkStorage>

Returns:

true if successfully loaded from persistent storage.

create

public SubnetworkStorage create(long byteCount)

Description copied from interface: Storable

Creates the underlying storage. First operation if it cannot be loaded.

Specified by:

create in interface Storable<SubnetworkStorage>

flush

public void flush()

Description copied from interface: Storable

This method makes sure that the underlying data is written to the storage. Keep in mind that a disc normally has an IO cache so that flush() is (less) probably not save against power loses.

Specified by:

flush in interface Storable<SubnetworkStorage>

close

public void close()

Description copied from interface: Storable

This method makes sure that the underlying used resources are released. WARNING: it does NOT flush on close!

Specified by:

close in interface Storable<SubnetworkStorage>

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

isClosed

public boolean isClosed()

Specified by:

isClosed in interface Storable<SubnetworkStorage>

getCapacity

public long getCapacity()

Specified by:

getCapacity in interface Storable<SubnetworkStorage>

Returns:

the allocated storage size in bytes