org.neo4j.cypher.internal.javacompat

Class ExecutionEngine

java.lang.Object

org.neo4j.cypher.internal.javacompat.ExecutionEngine

All Implemented Interfaces:

org.neo4j.kernel.impl.query.QueryExecutionEngine

public class ExecutionEngine
extends Object
implements org.neo4j.kernel.impl.query.QueryExecutionEngine

To run a Cypher query, use this class. This class construct and initialize both the cypher compiler and the cypher runtime, which is a very expensive operation so please make sure this will be constructed only once and properly reused.

Constructor Summary

Constructors

Constructor and Description
ExecutionEngine(org.neo4j.kernel.GraphDatabaseQueryService queryService, org.neo4j.logging.LogProvider logProvider) Creates an execution engine around the give graph database

Method Summary

Modifier and Type	Method and Description
org.neo4j.graphdb.Result	executeQuery(String query, Map<String,Object> parameters, org.neo4j.kernel.impl.query.TransactionalContext context)
boolean	isPeriodicCommit(String query)
String	prettify(String query) Turns a valid Cypher query and returns it with keywords in uppercase, and new-lines in the appropriate places.
org.neo4j.graphdb.Result	profileQuery(String query, Map<String,Object> parameters, org.neo4j.kernel.impl.query.TransactionalContext context)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExecutionEngine

public ExecutionEngine(org.neo4j.kernel.GraphDatabaseQueryService queryService,
                       org.neo4j.logging.LogProvider logProvider)

Creates an execution engine around the give graph database

Parameters:

queryService - The database to wrap

logProvider - A LogProvider for cypher-statements

Method Detail

executeQuery

public org.neo4j.graphdb.Result executeQuery(String query,
                                             Map<String,Object> parameters,
                                             org.neo4j.kernel.impl.query.TransactionalContext context)
                                      throws org.neo4j.kernel.impl.query.QueryExecutionKernelException

Specified by:

executeQuery in interface org.neo4j.kernel.impl.query.QueryExecutionEngine

Throws:

org.neo4j.kernel.impl.query.QueryExecutionKernelException

profileQuery

public org.neo4j.graphdb.Result profileQuery(String query,
                                             Map<String,Object> parameters,
                                             org.neo4j.kernel.impl.query.TransactionalContext context)
                                      throws org.neo4j.kernel.impl.query.QueryExecutionKernelException

Specified by:

profileQuery in interface org.neo4j.kernel.impl.query.QueryExecutionEngine

Throws:

org.neo4j.kernel.impl.query.QueryExecutionKernelException

isPeriodicCommit

public boolean isPeriodicCommit(String query)

Specified by:

isPeriodicCommit in interface org.neo4j.kernel.impl.query.QueryExecutionEngine

prettify

public String prettify(String query)

Turns a valid Cypher query and returns it with keywords in uppercase, and new-lines in the appropriate places.

Specified by:

prettify in interface org.neo4j.kernel.impl.query.QueryExecutionEngine

Parameters:

query - The query to make pretty

Returns:

The same query, but prettier