no.priv.garshol.duke
Class InMemoryLinkDatabase

java.lang.Object
  no.priv.garshol.duke.InMemoryLinkDatabase

All Implemented Interfaces:

LinkDatabase

public class InMemoryLinkDatabase
extends Object
implements LinkDatabase

A link database implementation which keeps everything in memory.

Constructor Summary

InMemoryLinkDatabase()

Method Summary

void	assertLink(Link link) Assert a link.
void	checkConsistency()
void	clear() Removes all links from the database.
void	close() Shuts down the database, releasing resources.
void	commit() Commit asserted links to persistent store.
List<Link>	getAllLinks() Get all links.
Collection<Link>	getAllLinksFor(String id) Get all links for this identity.
List<Link>	getChangesSince(long since) Returns all links modified since the given time.
Link	inferLink(String id1, String id2) Can we work out, based on what we know, the relationship between these two? Returns null if we don't know the relationship.
void	setDoInference(boolean infer)
String	toString()
Set<String>	traverseAll(String id, Set<String> seen)
void	validateConnection() Verifies that we still have a connection to the database, and reestablishes it, if not.

Methods inherited from class java.lang.Object

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

Constructor Detail

InMemoryLinkDatabase

public InMemoryLinkDatabase()

Method Detail

setDoInference

public void setDoInference(boolean infer)

getAllLinks

public List<Link> getAllLinks()

Description copied from interface: LinkDatabase

Get all links.

Specified by:

getAllLinks in interface LinkDatabase

getChangesSince

public List<Link> getChangesSince(long since)

Description copied from interface: LinkDatabase

Returns all links modified since the given time.

Specified by:

getChangesSince in interface LinkDatabase

getAllLinksFor

public Collection<Link> getAllLinksFor(String id)

Description copied from interface: LinkDatabase

Get all links for this identity. If there are no links it returns an empty collection, never null.

Specified by:

getAllLinksFor in interface LinkDatabase

assertLink

public void assertLink(Link link)

Description copied from interface: LinkDatabase

Assert a link.

Specified by:

assertLink in interface LinkDatabase

inferLink

public Link inferLink(String id1,
                      String id2)

Description copied from interface: LinkDatabase

Can we work out, based on what we know, the relationship between these two? Returns null if we don't know the relationship.

Specified by:

inferLink in interface LinkDatabase

checkConsistency

public void checkConsistency()

traverseAll

public Set<String> traverseAll(String id,
                               Set<String> seen)

validateConnection

public void validateConnection()

Description copied from interface: LinkDatabase

Verifies that we still have a connection to the database, and reestablishes it, if not. Useful when connections live a long time and are rarely used.

Specified by:

validateConnection in interface LinkDatabase

commit

public void commit()

Description copied from interface: LinkDatabase

Commit asserted links to persistent store.

Specified by:

commit in interface LinkDatabase

clear

public void clear()

Description copied from interface: LinkDatabase

Removes all links from the database.

Specified by:

clear in interface LinkDatabase

close

public void close()

Description copied from interface: LinkDatabase

Shuts down the database, releasing resources.

Specified by:

close in interface LinkDatabase

toString

public String toString()

Overrides:

toString in class Object