Package org.apache.hadoop.hbase.namequeues.impl

Class BalancerDecisionQueueService

java.lang.Object

org.apache.hadoop.hbase.namequeues.impl.BalancerDecisionQueueService

All Implemented Interfaces:

NamedQueueService

@Private
public class BalancerDecisionQueueService
extends Object
implements NamedQueueService

In-memory Queue service provider for Balancer Decision events

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	BALANCER_DECISION_QUEUE_SIZE
private final Queue<org.apache.hadoop.hbase.shaded.protobuf.generated.RecentLogs.BalancerDecision>	balancerDecisionQueue
private static final int	DEFAULT_BALANCER_DECISION_QUEUE_SIZE
private final boolean	isBalancerDecisionRecording
private static final org.slf4j.Logger	LOG
private static final int	REGION_PLANS_THRESHOLD_PER_BALANCER

Constructor Summary

Constructors

Constructor	Description
BalancerDecisionQueueService(org.apache.hadoop.conf.Configuration conf)

Method Summary

Modifier and Type	Method	Description
boolean	clearNamedQueue()	Cleans up queues maintained by services.
void	consumeEventFromDisruptor(NamedQueuePayload namedQueuePayload)	This implementation is generic for consuming records from LMAX disruptor and inserts records to EvictingQueue which is maintained by each ringbuffer provider.
NamedQueuePayload.NamedQueueEvent	getEvent()	Retrieve event type for NamedQueueService implementation.
NamedQueueGetResponse	getNamedQueueRecords(NamedQueueGetRequest request)	Retrieve in memory queue records from ringbuffer
void	persistAll(Connection connection)	Add all in memory queue records to system table.

Methods inherited from class java.lang.Object

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

Field Details

LOG

private static final org.slf4j.Logger LOG

isBalancerDecisionRecording

private final boolean isBalancerDecisionRecording

BALANCER_DECISION_QUEUE_SIZE

private static final String BALANCER_DECISION_QUEUE_SIZE

See Also:

• Constant Field Values

DEFAULT_BALANCER_DECISION_QUEUE_SIZE

private static final int DEFAULT_BALANCER_DECISION_QUEUE_SIZE

See Also:

• Constant Field Values

REGION_PLANS_THRESHOLD_PER_BALANCER

private static final int REGION_PLANS_THRESHOLD_PER_BALANCER

See Also:

• Constant Field Values

balancerDecisionQueue

private final Queue<org.apache.hadoop.hbase.shaded.protobuf.generated.RecentLogs.BalancerDecision> balancerDecisionQueue

Constructor Details

BalancerDecisionQueueService

public BalancerDecisionQueueService(org.apache.hadoop.conf.Configuration conf)

Method Details

getEvent

public NamedQueuePayload.NamedQueueEvent getEvent()

Description copied from interface: NamedQueueService

Retrieve event type for NamedQueueService implementation.

Specified by:

getEvent in interface NamedQueueService

Returns:

NamedQueuePayload.NamedQueueEvent

consumeEventFromDisruptor

public void consumeEventFromDisruptor(NamedQueuePayload namedQueuePayload)

Description copied from interface: NamedQueueService

This implementation is generic for consuming records from LMAX disruptor and inserts records to EvictingQueue which is maintained by each ringbuffer provider.

Specified by:

consumeEventFromDisruptor in interface NamedQueueService

Parameters:

namedQueuePayload - namedQueue payload from disruptor ring buffer

clearNamedQueue

public boolean clearNamedQueue()

Description copied from interface: NamedQueueService

Cleans up queues maintained by services.

Specified by:

clearNamedQueue in interface NamedQueueService

Returns:

true if slow log payloads are cleaned up, false otherwise

getNamedQueueRecords

public NamedQueueGetResponse getNamedQueueRecords(NamedQueueGetRequest request)

Description copied from interface: NamedQueueService

Retrieve in memory queue records from ringbuffer

Specified by:

getNamedQueueRecords in interface NamedQueueService

Parameters:

request - namedQueue request with event type

Returns:

queue records from ringbuffer after filter (if applied)

persistAll

public void persistAll(Connection connection)

Description copied from interface: NamedQueueService

Add all in memory queue records to system table. The implementors can use system table or direct HDFS file or ZK as persistence system.

Specified by:

persistAll in interface NamedQueueService