Package org.apache.hama.graph

Pregel clone graph computing framework on top of Hama.

See: Description

Interface Summary

Interface	Description
Aggregator<M extends org.apache.hadoop.io.Writable,VERTEX extends Vertex<?,?,?>>	Aggregators are a mechanism for global communication, monitoring, and data.
VertexInterface<V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	The vertex interface.
VertexOutputWriter<KEYOUT extends org.apache.hadoop.io.Writable,VALUEOUT extends org.apache.hadoop.io.Writable,V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	The VertexOutputWriter defines what parts of the vertex shall be written to the output format.
VerticesInfo<V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	VerticesInfo interface encapsulates the storage of vertices in a BSP Task.

Class Summary

Class	Description
AbsDiffAggregator	A absolute difference aggregator, it collects values before the compute and after the compute, then calculates the difference and globally accumulates (sums them up) them.
AbstractAggregator<M extends org.apache.hadoop.io.Writable,VERTEX extends Vertex<?,?,M>>	Abstract base case of an aggregator.
AggregationRunner<V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	Runner class to do the tasks that need to be done if aggregation was configured.
AverageAggregator	Averages the result of the AbsDiffAggregator.
DefaultVertexOutputWriter<V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	The VertexOutputWriter defines what parts of the vertex shall be written to the output format.
DiskVerticesInfo<V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>
Edge<VERTEX_ID extends org.apache.hadoop.io.WritableComparable,EDGE_VALUE_TYPE extends org.apache.hadoop.io.Writable>	The edge class
GraphJob
GraphJobMessage	A message that is either MapWritable (for meta communication purposes) or a real message (vertex ID and value).
GraphJobMessage.GraphJobMessageComparator
GraphJobRunner<V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	Fully generic graph job runner.
IDSkippingIterator<V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	Iterator that allows skipping of items on disk based on some given stategy.
ListVerticesInfo<V extends org.apache.hadoop.io.WritableComparable<V>,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	VerticesInfo encapsulates the storage of vertices in a BSP Task.
MaxAggregator
MinAggregator
OffHeapVerticesInfo<V extends org.apache.hadoop.io.WritableComparable<?>,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	An off heap version of a Vertex storage.
SumAggregator	Sums all vertex values globally.
Vertex<V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	Vertex is a abstract definition of Google Pregel Vertex.
VertexInputReader<KEYIN extends org.apache.hadoop.io.Writable,VALUEIN extends org.apache.hadoop.io.Writable,V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>	A reader to read Hama's input files and parses a vertex out of it.
VertexMessageIterable<V,T>	The rationale behind this class is that it polls messages if they are requested and once it finds a message that is not dedicated for this vertex, it breaks the iteration.

Enum Summary

Enum	Description
GraphJobRunner.GraphJobCounter

Package org.apache.hama.graph Description

Pregel clone graph computing framework on top of Hama.