oracle.pg.common

Class VertexCache

java.lang.Object

oracle.pg.common.VertexCache

public class VertexCache
extends java.lang.Object

This class implements a cache layer for OracleVertexBase objects. Note that by design each graph will have its own vertices cache.

Method Summary

Modifier and Type	Method and Description
void	clearCache() This method empties the cache
void	dumpStatistics(java.io.PrintStream ps)
OracleVertexBase	get(java.lang.Long lID) Fetch one vertex from the cache using its ID.
static VertexCache	getInstance(OraclePropertyGraphBase opg) This method returns an instance of VertexCache.
void	put(java.lang.Long lID, OracleVertexBase v) Add one vertex to the cache.
void	put(OracleVertexBase v) Add one vertex to the cache
OracleVertexBase	remove(java.lang.Long lID) Remove one Vertex from the cache
OracleVertexBase	remove(OracleVertexBase v) Remove one Vertex from the cache

Methods inherited from class java.lang.Object

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

Method Detail

clearCache

public void clearCache()

This method empties the cache

dumpStatistics

public void dumpStatistics(java.io.PrintStream ps)

get

public OracleVertexBase get(java.lang.Long lID)

Fetch one vertex from the cache using its ID. If the vertex is not in the cache, then return NULL.

getInstance

public static VertexCache getInstance(OraclePropertyGraphBase opg)

This method returns an instance of VertexCache. Note that there is a 1:1 mapping between property graph names and VertexCache objects

put

public void put(java.lang.Long lID,
                OracleVertexBase v)

Add one vertex to the cache. TODO: avoid two separate calls to this API with the same IDs but different vertices.

put

public void put(OracleVertexBase v)

Add one vertex to the cache

remove

public OracleVertexBase remove(java.lang.Long lID)

Remove one Vertex from the cache

remove

public OracleVertexBase remove(OracleVertexBase v)

Remove one Vertex from the cache