Package org.apache.tinkerpop.gremlin.process.computer.util

Class MapMemory

java.lang.Object

org.apache.tinkerpop.gremlin.process.computer.util.MapMemory

All Implemented Interfaces:

Serializable, Memory, Memory.Admin

public final class MapMemory
extends Object
implements Memory.Admin, Serializable

Author:

Marko A. Rodriguez (http://markorodriguez.com)

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.process.computer.Memory

Memory.Admin, Memory.Exceptions

Constructor Summary

Constructors

Constructor	Description
MapMemory()
MapMemory(Memory otherMemory)

Method Summary

Modifier and Type	Method	Description
void	add(String key, Object value)	Set the value of the provided key.
void	addMapReduceMemoryKey(MapReduce mapReduce)
void	addVertexProgramMemoryComputeKeys(VertexProgram<?> vertexProgram)
<R> R	get(String key)	Get the value associated with the provided key.
int	getIteration()	Get the current iteration number.
long	getRuntime()	Get the amount of milliseconds the GraphComputer has been executing thus far.
void	incrIteration()
Set<String>	keys()	The set of keys currently associated with this memory.
void	set(String key, Object value)
void	setIteration(int iteration)
void	setRuntime(long runtime)
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tinkerpop.gremlin.process.computer.Memory

asMap, exists, isInitialIteration

Methods inherited from interface org.apache.tinkerpop.gremlin.process.computer.Memory.Admin

asImmutable

Constructor Detail

MapMemory

public MapMemory()

MapMemory

public MapMemory(Memory otherMemory)

Method Detail

addVertexProgramMemoryComputeKeys

public void addVertexProgramMemoryComputeKeys(VertexProgram<?> vertexProgram)

addMapReduceMemoryKey

public void addMapReduceMemoryKey(MapReduce mapReduce)

keys

public Set<String> keys()

Description copied from interface: Memory

The set of keys currently associated with this memory.

Specified by:

keys in interface Memory

Returns:

the memory's key set.

get

public <R> R get(String key)
          throws IllegalArgumentException

Description copied from interface: Memory

Get the value associated with the provided key.

Specified by:

get in interface Memory

Type Parameters:

R - the type of the value

Parameters:

key - the key of the value

Returns:

the value

Throws:

IllegalArgumentException - is thrown if the key does not exist

set

public void set(String key,
                Object value)

Specified by:

set in interface Memory

getIteration

public int getIteration()

Description copied from interface: Memory

Get the current iteration number.

Specified by:

getIteration in interface Memory

Returns:

the current iteration

getRuntime

public long getRuntime()

Description copied from interface: Memory

Get the amount of milliseconds the GraphComputer has been executing thus far.

Specified by:

getRuntime in interface Memory

Returns:

the total time in milliseconds

add

public void add(String key,
                Object value)

Description copied from interface: Memory

Set the value of the provided key. This is typically called in setup() and/or terminate() of the VertexProgram. If this is called during execute(), there is no guarantee as to the ultimately stored value as call order is indeterminate. It is up to the implementation to determine the states in which this method can be called.

Specified by:

add in interface Memory

Parameters:

key - they key to set a value for

value - the value to set for the key

toString

public String toString()

Overrides:

toString in class Object

incrIteration

public void incrIteration()

Specified by:

incrIteration in interface Memory.Admin

setIteration

public void setIteration(int iteration)

Specified by:

setIteration in interface Memory.Admin

setRuntime

public void setRuntime(long runtime)

Specified by:

setRuntime in interface Memory.Admin