Package org.redisson.mapreduce

Class RedissonMapReduce<KIn,VIn,KOut,VOut>

java.lang.Object

org.redisson.mapreduce.RedissonMapReduce<KIn,VIn,KOut,VOut>

Type Parameters:

KIn - input key type

VIn - input value type

KOut - output key type

VOut - output value type

All Implemented Interfaces:

RMapReduce<KIn,VIn,KOut,VOut>, RMapReduceExecutor<VIn,KOut,VOut>

public class RedissonMapReduce<KIn,VIn,KOut,VOut>
extends Object
implements RMapReduce<KIn,VIn,KOut,VOut>

Author:

Nikita Koksharov

Constructor Summary

Constructors

Constructor	Description
RedissonMapReduce(RObject object, RedissonClient redisson, CommandAsyncExecutor commandExecutor)

Method Summary

Modifier and Type	Method	Description
protected void	check(Object task)
protected Callable<Object>	createTask(String resultMapName, RCollator<KOut,VOut,Object> collator)
Map<KOut,VOut>	execute()	Executes MapReduce process across Redisson Nodes
void	execute(String resultMapName)	Executes MapReduce process across Redisson Nodes and stores result in map with resultMapName
<R> R	execute(RCollator<KOut,VOut,R> collator)	Executes MapReduce process across Redisson Nodes and collides result using defined collator
RFuture<Map<KOut,VOut>>	executeAsync()	Executes MapReduce process across Redisson Nodes in asynchronous mode
RFuture<Void>	executeAsync(String resultMapName)	Executes MapReduce process across Redisson Nodes in asynchronous mode and stores result in map with resultMapName
<R> RFuture<R>	executeAsync(RCollator<KOut,VOut,R> collator)	Executes MapReduce process across Redisson Nodes in asynchronous mode and collides result using defined collator
RMapReduce<KIn,VIn,KOut,VOut>	mapper(RMapper<KIn,VIn,KOut,VOut> mapper)	Setup Mapper object
RMapReduce<KIn,VIn,KOut,VOut>	reducer(RReducer<KOut,VOut> reducer)	Setup Reducer object
RMapReduce<KIn,VIn,KOut,VOut>	timeout(long timeout, TimeUnit unit)	Defines timeout for MapReduce process.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.redisson.api.mapreduce.RMapReduceExecutor

execute, execute, execute, executeAsync, executeAsync, executeAsync

Constructor Details

RedissonMapReduce

public RedissonMapReduce(RObject object,
 RedissonClient redisson,
 CommandAsyncExecutor commandExecutor)

Method Details

timeout

public RMapReduce<KIn,VIn,KOut,VOut> timeout(long timeout,
 TimeUnit unit)

Description copied from interface: RMapReduce

Defines timeout for MapReduce process. 0 means infinity timeout.

Specified by:

timeout in interface RMapReduce<KIn,VIn,KOut,VOut>

Parameters:

timeout - for process

unit - of timeout

Returns:

self instance

mapper

public RMapReduce<KIn,VIn,KOut,VOut> mapper(RMapper<KIn,VIn,KOut,VOut> mapper)

Description copied from interface: RMapReduce

Setup Mapper object

Specified by:

mapper in interface RMapReduce<KIn,VIn,KOut,VOut>

Parameters:

mapper - used during MapReduce

Returns:

self instance

reducer

public RMapReduce<KIn,VIn,KOut,VOut> reducer(RReducer<KOut,VOut> reducer)

Description copied from interface: RMapReduce

Setup Reducer object

Specified by:

reducer in interface RMapReduce<KIn,VIn,KOut,VOut>

Parameters:

reducer - used during MapReduce

Returns:

self instance

createTask

protected Callable<Object> createTask(String resultMapName,
 RCollator<KOut,VOut,Object> collator)

check

protected void check(Object task)

execute

public Map<KOut,VOut> execute()

Description copied from interface: RMapReduceExecutor

Executes MapReduce process across Redisson Nodes

Specified by:

execute in interface RMapReduceExecutor<M,VIn,KOut>

Returns:

map containing reduced keys and values

executeAsync

public RFuture<Map<KOut,VOut>> executeAsync()

Description copied from interface: RMapReduceExecutor

Executes MapReduce process across Redisson Nodes in asynchronous mode

Specified by:

executeAsync in interface RMapReduceExecutor<M,VIn,KOut>

Returns:

map containing reduced keys and values

execute

public void execute(String resultMapName)

Description copied from interface: RMapReduceExecutor

Executes MapReduce process across Redisson Nodes and stores result in map with resultMapName

Specified by:

execute in interface RMapReduceExecutor<M,VIn,KOut>

Parameters:

resultMapName - - destination map name

executeAsync

public RFuture<Void> executeAsync(String resultMapName)

Description copied from interface: RMapReduceExecutor

Executes MapReduce process across Redisson Nodes in asynchronous mode and stores result in map with resultMapName

Specified by:

executeAsync in interface RMapReduceExecutor<M,VIn,KOut>

Parameters:

resultMapName - - destination map name

Returns:

void

execute

public <R> R execute(RCollator<KOut,VOut,R> collator)

Description copied from interface: RMapReduceExecutor

Executes MapReduce process across Redisson Nodes and collides result using defined collator

Specified by:

execute in interface RMapReduceExecutor<M,VIn,KOut>

Type Parameters:

R - result type

Parameters:

collator - applied to result

Returns:

collated result

executeAsync

public <R> RFuture<R> executeAsync(RCollator<KOut,VOut,R> collator)

Description copied from interface: RMapReduceExecutor

Executes MapReduce process across Redisson Nodes in asynchronous mode and collides result using defined collator

Specified by:

executeAsync in interface RMapReduceExecutor<M,VIn,KOut>

Type Parameters:

R - result type

Parameters:

collator - applied to result

Returns:

collated result