SlowLogQueueService (Apache HBase 1.7.2 API)

java.lang.Object
- org.apache.hadoop.hbase.namequeues.impl.SlowLogQueueService

All Implemented Interfaces:: NamedQueueService

@InterfaceAudience.Private
public class SlowLogQueueService
extends Object
implements NamedQueueService

In-memory Queue service provider for Slow/LargeLog events

Constructor Summary

Constructors
Constructor and Description

SlowLogQueueService(org.apache.hadoop.conf.Configuration conf)

Constructors
Constructor and Description
`SlowLogQueueService(org.apache.hadoop.conf.Configuration conf)`

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`clearNamedQueue()` Cleans up queues maintained by services.
`void`	`consumeEventFromDisruptor(NamedQueuePayload namedQueuePayload)` This implementation is specific to slowLog event.
`NamedQueuePayload.NamedQueueEvent`	`getEvent()` Retrieve event type for NamedQueueService implementation.
`NamedQueueGetResponse`	`getNamedQueueRecords(NamedQueueGetRequest request)` Retrieve in memory queue records from ringbuffer
`void`	`persistAll()` Add all slowLog events to system table.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SlowLogQueueService
```
public SlowLogQueueService(org.apache.hadoop.conf.Configuration conf)
```
- Method Detail
  - 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)
```
    This implementation is specific to slowLog event. This consumes slowLog event from disruptor and inserts records to EvictingQueue.
    
    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()
```
    Add all slowLog events to system table. This is only for slowLog event's persistence on system table.
    
    Specified by:
    
    persistAll in interface NamedQueueService

Class SlowLogQueueService

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

SlowLogQueueService

Method Detail

getEvent

consumeEventFromDisruptor

clearNamedQueue

getNamedQueueRecords

persistAll