org.apache.hadoop.hbase.ipc

Class SimpleRpcScheduler

java.lang.Object

org.apache.hadoop.hbase.ipc.SimpleRpcScheduler

All Implemented Interfaces:

RpcScheduler

@InterfaceAudience.Private
@InterfaceStability.Evolving
public class SimpleRpcScheduler
extends Object
implements RpcScheduler

A scheduler that maintains isolated handler pools for general, high-priority and replication requests.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.ipc.RpcScheduler

RpcScheduler.Context

Constructor Summary

Constructors

Constructor and Description
SimpleRpcScheduler(org.apache.hadoop.conf.Configuration conf, int handlerCount, int priorityHandlerCount, int replicationHandlerCount, PriorityFunction priority, int highPriorityLevel)

Method Summary

Methods

Modifier and Type	Method and Description
void	dispatch(CallRunner callTask) Dispatches an RPC request asynchronously.
int	getGeneralQueueLength() Retrieves length of the general queue for metrics.
int	getPriorityQueueLength() Retrieves length of the priority queue for metrics.
int	getReplicationQueueLength() Retrieves length of the replication queue for metrics.
void	init(RpcScheduler.Context context) Does some quick initialization.
void	start() Prepares for request serving.
void	stop() Stops serving new requests.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleRpcScheduler

public SimpleRpcScheduler(org.apache.hadoop.conf.Configuration conf,
                  int handlerCount,
                  int priorityHandlerCount,
                  int replicationHandlerCount,
                  PriorityFunction priority,
                  int highPriorityLevel)

Parameters:

conf -

handlerCount - the number of handler threads that will be used to process calls

priorityHandlerCount - How many threads for priority handling.

replicationHandlerCount - How many threads for replication handling.

highPriorityLevel -

priority - Function to extract request priority.

Method Detail

init

public void init(RpcScheduler.Context context)

Description copied from interface: RpcScheduler

Does some quick initialization. Heavy tasks (e.g. starting threads) should be done in RpcScheduler.start(). This method is called before start.

Specified by:

init in interface RpcScheduler

Parameters:

context - provides methods to retrieve runtime information from

start

public void start()

Description copied from interface: RpcScheduler

Prepares for request serving. An implementation may start some handler threads here.

Specified by:

start in interface RpcScheduler

stop

public void stop()

Description copied from interface: RpcScheduler

Stops serving new requests.

Specified by:

stop in interface RpcScheduler

dispatch

public void dispatch(CallRunner callTask)
              throws InterruptedException

Description copied from interface: RpcScheduler

Dispatches an RPC request asynchronously. An implementation is free to choose to process the request immediately or delay it for later processing.

Specified by:

dispatch in interface RpcScheduler

Parameters:

callTask - the request to be dispatched

Throws:

InterruptedException

getGeneralQueueLength

public int getGeneralQueueLength()

Description copied from interface: RpcScheduler

Retrieves length of the general queue for metrics.

Specified by:

getGeneralQueueLength in interface RpcScheduler

getPriorityQueueLength

public int getPriorityQueueLength()

Description copied from interface: RpcScheduler

Retrieves length of the priority queue for metrics.

Specified by:

getPriorityQueueLength in interface RpcScheduler

getReplicationQueueLength

public int getReplicationQueueLength()

Description copied from interface: RpcScheduler

Retrieves length of the replication queue for metrics.

Specified by:

getReplicationQueueLength in interface RpcScheduler