org.graylog2.shared.messageq

Class AbstractMessageQueueReader

java.lang.Object

com.google.common.util.concurrent.AbstractExecutionThreadService

org.graylog2.shared.messageq.AbstractMessageQueueReader

All Implemented Interfaces:

com.google.common.util.concurrent.Service, MessageQueueReader

Direct Known Subclasses:

LocalKafkaMessageQueueReader

public abstract class AbstractMessageQueueReader
extends com.google.common.util.concurrent.AbstractExecutionThreadService
implements MessageQueueReader

Nested Class Summary

Nested classes/interfaces inherited from interface org.graylog2.shared.messageq.MessageQueueReader

MessageQueueReader.Metrics

Nested classes/interfaces inherited from interface com.google.common.util.concurrent.Service

com.google.common.util.concurrent.Service.Listener, com.google.common.util.concurrent.Service.State

Constructor Summary

Constructors

Constructor and Description
AbstractMessageQueueReader(com.google.common.eventbus.EventBus eventBus)

Method Summary

Modifier and Type	Method and Description
void	listenForLifecycleChanges(Lifecycle lifecycle)
protected boolean	shouldBeReading() Indicates if the reader should read from the message queue or if it should currently pause reading.
protected void	shutDown()
protected void	startUp()

Methods inherited from class com.google.common.util.concurrent.AbstractExecutionThreadService

addListener, awaitRunning, awaitRunning, awaitTerminated, awaitTerminated, executor, failureCause, isRunning, run, serviceName, startAsync, state, stopAsync, toString, triggerShutdown

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.common.util.concurrent.Service

addListener, awaitRunning, awaitRunning, awaitRunning, awaitTerminated, awaitTerminated, awaitTerminated, failureCause, isRunning, startAsync, state, stopAsync

Constructor Detail

AbstractMessageQueueReader

public AbstractMessageQueueReader(com.google.common.eventbus.EventBus eventBus)

Method Detail

startUp

protected void startUp()
                throws Exception

Overrides:

startUp in class com.google.common.util.concurrent.AbstractExecutionThreadService

Throws:

Exception

shutDown

protected void shutDown()
                 throws Exception

Overrides:

shutDown in class com.google.common.util.concurrent.AbstractExecutionThreadService

Throws:

Exception

listenForLifecycleChanges

public void listenForLifecycleChanges(Lifecycle lifecycle)

shouldBeReading

protected boolean shouldBeReading()

Indicates if the reader should read from the message queue or if it should currently pause reading. The returned value is affected by lifecycle changes, e.g. during server startup or when processing has stopped it will be false, during normal operation mode it will be true.