eu.ehri.project.core.impl

Class TxNeo4jGraph

java.lang.Object

eu.ehri.project.core.impl.neo4j.Neo4j2Graph

eu.ehri.project.core.impl.TxNeo4jGraph

All Implemented Interfaces:

com.tinkerpop.blueprints.Graph, com.tinkerpop.blueprints.MetaGraph<org.neo4j.graphdb.GraphDatabaseService>, com.tinkerpop.blueprints.TransactionalGraph, TxGraph

public class TxNeo4jGraph
extends Neo4j2Graph
implements TxGraph

Wraps Neo4jGraph and adds an extra method to allow asserting that it should not be in a transaction.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	TxNeo4jGraph.Neo4jTx
static class	TxNeo4jGraph.UnderlyingTxRemovedError

Nested classes/interfaces inherited from interface com.tinkerpop.blueprints.TransactionalGraph

com.tinkerpop.blueprints.TransactionalGraph.Conclusion

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	logger

Fields inherited from class eu.ehri.project.core.impl.neo4j.Neo4j2Graph

checkElementsInTransaction, tx

Constructor Summary

Constructors

Constructor and Description
TxNeo4jGraph(org.neo4j.graphdb.GraphDatabaseService rawGraph)
TxNeo4jGraph(String directory)

Method Summary

Modifier and Type	Method and Description
void	autoStartTransaction(boolean forWrite) This overridden function is now a no-op.
Tx	beginTx() Obtain a wrapped transaction object.
void	commit()
void	init() Since we override autoStartTx to do nothing, we must also override this function (which loads key indices and sneakily commits them) when the graph is constructed.
boolean	isInTransaction() Checks if the graph is currently in a transaction.
void	shutdown()

Methods inherited from class eu.ehri.project.core.impl.neo4j.Neo4j2Graph

addEdge, addVertex, checkElementsInTransaction, getEdge, getEdges, getEdges, getFeatures, getRawGraph, getVertex, getVertices, getVertices, getVerticesByLabel, getVerticesByLabelKeyValue, getVerticesByQuery, query, query, removeEdge, removeVertex, rollback, stopTransaction, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.tinkerpop.blueprints.TransactionalGraph

rollback, stopTransaction

Methods inherited from interface com.tinkerpop.blueprints.Graph

addEdge, addVertex, getEdge, getEdges, getEdges, getFeatures, getVertex, getVertices, getVertices, query, removeEdge, removeVertex

Field Detail

logger

public static final org.slf4j.Logger logger

Constructor Detail

TxNeo4jGraph

public TxNeo4jGraph(String directory)

TxNeo4jGraph

public TxNeo4jGraph(org.neo4j.graphdb.GraphDatabaseService rawGraph)

Method Detail

beginTx

public Tx beginTx()

Description copied from interface: TxGraph

Obtain a wrapped transaction object.

Specified by:

beginTx in interface TxGraph

Returns:

a transaction wrapper

commit

public void commit()

Specified by:

commit in interface com.tinkerpop.blueprints.TransactionalGraph

Overrides:

commit in class Neo4j2Graph

shutdown

public void shutdown()

Specified by:

shutdown in interface com.tinkerpop.blueprints.Graph

Overrides:

shutdown in class Neo4j2Graph

autoStartTransaction

public void autoStartTransaction(boolean forWrite)

This overridden function is now a no-op.

Overrides:

autoStartTransaction in class Neo4j2Graph

Parameters:

forWrite - unused parameter

init

public void init()

Since we override autoStartTx to do nothing, we must also override this function (which loads key indices and sneakily commits them) when the graph is constructed. We do not use key indexable functionality so nothing is lost (unless the base class is changed, but, can't do much about that.)

Overrides:

init in class Neo4j2Graph

isInTransaction

public boolean isInTransaction()

Checks if the graph is currently in a transaction.

Specified by:

isInTransaction in interface TxGraph

Returns:

whether a transaction is held in this thread.