org.janusgraph.graphdb.olap

Interface VertexScanJob

All Superinterfaces:

Cloneable

All Known Implementing Classes:

IndexRepairJob, VertexMapJob, VertexProgramScanJob

public interface VertexScanJob
extends Cloneable

Expresses a computation over all vertices ina a graph database. Process is called for each vertex that is previously loaded from disk. To limit the data that needs to be pulled out of the database, the query can specify the queries (which need to be vertex-centric) for the data that is needed. Only this data is then pulled. If the user attempts to access additional data during processing, the behavior is undefined.

Author:

Matthias Broecheler ([email protected])

Method Summary

Modifier and Type	Method and Description
VertexScanJob	clone() Returns a clone of this VertexScanJob.
void	getQueries(QueryContainer queries) Specify the queries for the data to be loaded into the vertices prior to processing.
void	process(JanusGraphVertex vertex, ScanMetrics metrics) Process the given vertex with its adjacency list and properties pre-loaded.
default void	workerIterationEnd(ScanMetrics metrics)
default void	workerIterationStart(JanusGraph graph, Configuration config, ScanMetrics metrics)

Method Detail

workerIterationStart

default void workerIterationStart(JanusGraph graph,
                                  Configuration config,
                                  ScanMetrics metrics)

Parameters:

graph -

config -

metrics -

See Also:

ScanJob

workerIterationEnd

default void workerIterationEnd(ScanMetrics metrics)

Parameters:

metrics -

See Also:

ScanJob

process

void process(JanusGraphVertex vertex,
             ScanMetrics metrics)

Process the given vertex with its adjacency list and properties pre-loaded.

Parameters:

vertex -

metrics -

getQueries

void getQueries(QueryContainer queries)

Specify the queries for the data to be loaded into the vertices prior to processing.

Parameters:

queries -

clone

VertexScanJob clone()

Returns a clone of this VertexScanJob. The clone will not yet be initialized for computation but all of its internal state (if any) must match that of the original copy.

Returns:

A clone of this job