com.goldencode.graphdb

Class JanusGraphDB

java.lang.Object

com.goldencode.graphdb.GraphDB

com.goldencode.graphdb.JanusGraphDB

class JanusGraphDB
extends GraphDB

An adapter to obtain connections and create indexes in a JanusGraph graph DB

Field Summary

Fields

Modifier and Type	Field and Description
private static CentralLogger	LOG Logger

Constructor Summary

Constructors

Constructor and Description
JanusGraphDB()

Method Summary

Modifier and Type	Method and Description
protected org.apache.tinkerpop.gremlin.structure.Graph	connectGraphDBImpl(org.apache.commons.configuration2.Configuration configuration) Obtain a graph DB with the connection details specified in the given Configuration.
protected void	createIndexImpl(org.apache.tinkerpop.gremlin.structure.Graph db, java.lang.String[] keys, java.lang.Class<?>[] datatypes, boolean element, boolean uniq, boolean mixed) Create a single-property index in the given graph DB.
protected void	createIndexImpl(org.apache.tinkerpop.gremlin.structure.Graph db, java.lang.String key, java.lang.Class<?> datatype, boolean element, boolean uniq, boolean mixed) Create a single-property index in the given graph DB.
private boolean	reindex(org.janusgraph.core.JanusGraph graph, org.janusgraph.core.schema.JanusGraphManagement mgmt, java.lang.String idx) Attempt to reindex the specified index (which was newly created).

Methods inherited from class com.goldencode.graphdb.GraphDB

createIndex, createIndex, createIndex, createIndex, obtainGraphDB

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final CentralLogger LOG

Logger

Constructor Detail

JanusGraphDB

JanusGraphDB()

Method Detail

connectGraphDBImpl

protected org.apache.tinkerpop.gremlin.structure.Graph connectGraphDBImpl(org.apache.commons.configuration2.Configuration configuration)

Obtain a graph DB with the connection details specified in the given Configuration.

Specified by:

connectGraphDBImpl in class GraphDB

Parameters:

configuration - The connection details.

Returns:

A connected graph DB.

createIndexImpl

protected void createIndexImpl(org.apache.tinkerpop.gremlin.structure.Graph db,
                               java.lang.String[] keys,
                               java.lang.Class<?>[] datatypes,
                               boolean element,
                               boolean uniq,
                               boolean mixed)

Create a single-property index in the given graph DB.

Specified by:

createIndexImpl in class GraphDB

Parameters:

db - The graph DB.

keys - The property key names to be indexed. This will also be the index name.

datatypes - The keys' types.

element - true if the vertex element should be indexed, otherwise the edge element will be indexed.

uniq - true if the index should enforce uniqueness of the given key.

mixed - Flag indicating this index will be created in 'mixed' mode, using an external index.

createIndexImpl

protected void createIndexImpl(org.apache.tinkerpop.gremlin.structure.Graph db,
                               java.lang.String key,
                               java.lang.Class<?> datatype,
                               boolean element,
                               boolean uniq,
                               boolean mixed)

Create a single-property index in the given graph DB.

Specified by:

createIndexImpl in class GraphDB

Parameters:

db - The graph DB.

key - The property key name to be indexed. This will also be the index name.

datatype - The key's type.

element - true if the vertex element should be indexed, otherwise the edge element will be indexed.

uniq - true if the index should enforce uniqueness of the given key.

mixed - Flag indicating this index will be created in 'mixed' mode, using an external index.

reindex

private boolean reindex(org.janusgraph.core.JanusGraph graph,
                        org.janusgraph.core.schema.JanusGraphManagement mgmt,
                        java.lang.String idx)

Attempt to reindex the specified index (which was newly created).

Parameters:

graph - The graph database instance.

mgmt - The current management object in which the index was created.

idx - The name of the index.

Returns:

true if the reindexing was successful, false otherwise.