Package org.apache.cassandra.service.disk.usage

Class DiskUsageBroadcaster

java.lang.Object

org.apache.cassandra.service.disk.usage.DiskUsageBroadcaster

All Implemented Interfaces:

IEndpointStateChangeSubscriber

public class DiskUsageBroadcaster
extends Object
implements IEndpointStateChangeSubscriber

Starts DiskUsageMonitor to monitor local disk usage state and broadcast new state via Gossip. At the same time, it caches cluster's disk usage state received via Gossip.

Field Summary

Fields

Modifier and Type	Field	Description
static final DiskUsageBroadcaster	instance

Constructor Summary

Constructors

Constructor	Description
DiskUsageBroadcaster(DiskUsageMonitor monitor)

Method Summary

Modifier and Type	Method	Description
void	beforeChange(InetAddressAndPort endpoint, EndpointState currentState, ApplicationState newStateKey, VersionedValue newValue)
boolean	hasStuffedOrFullNode()
boolean	isFull(InetAddressAndPort endpoint)
boolean	isStuffed(InetAddressAndPort endpoint)
void	onAlive(InetAddressAndPort endpoint, EndpointState state)
void	onChange(InetAddressAndPort endpoint, ApplicationState state, VersionedValue value)
void	onDead(InetAddressAndPort endpoint, EndpointState state)
void	onJoin(InetAddressAndPort endpoint, EndpointState epState)	Use to inform interested parties about the change in the state for specified endpoint
void	onRemove(InetAddressAndPort endpoint)
void	onRestart(InetAddressAndPort endpoint, EndpointState state)	Called whenever a node is restarted.
void	startBroadcasting()
DiskUsageState	state(InetAddressAndPort endpoint)

Methods inherited from class java.lang.Object

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

Field Details

instance

public static final DiskUsageBroadcaster instance

Constructor Details

DiskUsageBroadcaster

public DiskUsageBroadcaster(DiskUsageMonitor monitor)

Method Details

hasStuffedOrFullNode

public boolean hasStuffedOrFullNode()

Returns:

true if any node in the cluster is STUFFED OR FULL

isFull

public boolean isFull(InetAddressAndPort endpoint)

Returns:

true if given node's disk usage is FULL

isStuffed

public boolean isStuffed(InetAddressAndPort endpoint)

Returns:

true if given node's disk usage is STUFFED

state

public DiskUsageState state(InetAddressAndPort endpoint)

startBroadcasting

public void startBroadcasting()

onChange

public void onChange(InetAddressAndPort endpoint,
 ApplicationState state,
 VersionedValue value)

Specified by:

onChange in interface IEndpointStateChangeSubscriber

onJoin

public void onJoin(InetAddressAndPort endpoint,
 EndpointState epState)

Description copied from interface: IEndpointStateChangeSubscriber

Use to inform interested parties about the change in the state for specified endpoint

Specified by:

onJoin in interface IEndpointStateChangeSubscriber

Parameters:

endpoint - endpoint for which the state change occurred.

epState - state that actually changed for the above endpoint.

beforeChange

public void beforeChange(InetAddressAndPort endpoint,
 EndpointState currentState,
 ApplicationState newStateKey,
 VersionedValue newValue)

Specified by:

beforeChange in interface IEndpointStateChangeSubscriber

onAlive

public void onAlive(InetAddressAndPort endpoint,
 EndpointState state)

Specified by:

onAlive in interface IEndpointStateChangeSubscriber

onDead

public void onDead(InetAddressAndPort endpoint,
 EndpointState state)

Specified by:

onDead in interface IEndpointStateChangeSubscriber

onRestart

public void onRestart(InetAddressAndPort endpoint,
 EndpointState state)

Description copied from interface: IEndpointStateChangeSubscriber

Called whenever a node is restarted. Note that there is no guarantee when that happens that the node was previously marked down. It will have only if state.isAlive() == false as state is from before the restarted node is marked up.

Specified by:

onRestart in interface IEndpointStateChangeSubscriber

onRemove

public void onRemove(InetAddressAndPort endpoint)

Specified by:

onRemove in interface IEndpointStateChangeSubscriber