org.apache.giraph.io.formats.multi

Class VertexInputFormatDescription<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

java.lang.Object

org.apache.giraph.io.formats.multi.InputFormatDescription<VertexInputFormat<I,V,E>>

org.apache.giraph.io.formats.multi.VertexInputFormatDescription<I,V,E>

Type Parameters:

I - Vertex id

V - Vertex data

E - Edge data

public class VertexInputFormatDescription<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>
extends InputFormatDescription<VertexInputFormat<I,V,E>>

Description of the vertex input format - holds vertex input format class and all parameters specifically set for that vertex input format. Used only with MultiVertexInputFormat

Field Summary

Fields

Modifier and Type	Field and Description
static StrConfOption	VERTEX_INPUT_FORMAT_DESCRIPTIONS VertexInputFormats description - JSON array containing a JSON array for each vertex input.

Constructor Summary

Constructors

Constructor and Description
VertexInputFormatDescription(Class<? extends VertexInputFormat<I,V,E>> vertexInputFormatClass) Constructor with vertex input format class
VertexInputFormatDescription(String description) Constructor with json string describing this input format

Method Summary

Modifier and Type	Method and Description
static <I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable> List<VertexInputFormat<I,V,E>>	createVertexInputFormats(ImmutableClassesGiraphConfiguration<I,V,E> conf) Create all vertex input formats
static <I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable> List<VertexInputFormatDescription<I,V,E>>	getVertexInputFormatDescriptions(org.apache.hadoop.conf.Configuration conf) Get descriptions of vertex input formats from configuration.

Methods inherited from class org.apache.giraph.io.formats.multi.InputFormatDescription

addParameter, addParameters, getInputFormatClass, putParametersToConfiguration, setInputFormatClass, toJsonArray, toJsonString, toString

Methods inherited from class java.lang.Object

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

Field Detail

VERTEX_INPUT_FORMAT_DESCRIPTIONS

public static final StrConfOption VERTEX_INPUT_FORMAT_DESCRIPTIONS

VertexInputFormats description - JSON array containing a JSON array for each vertex input. Vertex input JSON arrays contain one or two elements - first one is the name of vertex input class, and second one is JSON object with all specific parameters for this vertex input. For example: [["VIF1",{"p":"v1"}],["VIF2",{"p":"v2","q":"v"}]]

Constructor Detail

VertexInputFormatDescription

public VertexInputFormatDescription(Class<? extends VertexInputFormat<I,V,E>> vertexInputFormatClass)

Constructor with vertex input format class

Parameters:

vertexInputFormatClass - Vertex input format class

VertexInputFormatDescription

public VertexInputFormatDescription(String description)

Constructor with json string describing this input format

Parameters:

description - Json string describing this input format

Method Detail

getVertexInputFormatDescriptions

public static <I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable> List<VertexInputFormatDescription<I,V,E>> getVertexInputFormatDescriptions(org.apache.hadoop.conf.Configuration conf)

Get descriptions of vertex input formats from configuration.

Type Parameters:

I - Vertex id

V - Vertex data

E - Edge data

Parameters:

conf - Configuration

Returns:

List of vertex input format descriptions

createVertexInputFormats

public static <I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable> List<VertexInputFormat<I,V,E>> createVertexInputFormats(ImmutableClassesGiraphConfiguration<I,V,E> conf)

Create all vertex input formats

Type Parameters:

I - Vertex id

V - Vertex data

E - Edge data

Parameters:

conf - Configuration

Returns:

List with all vertex input formats