com.aquenos.cassandra.pvarchiver.server.cluster

Class ServerStatus

java.lang.Object

com.aquenos.cassandra.pvarchiver.server.cluster.ServerStatus

public class ServerStatus
extends Object

Status information for an archive server. The status object represents the state of the server when the object was created and is not updated when the state changes.

Author:

Sebastian Marsching

Constructor Summary

Constructors

Constructor and Description
ServerStatus(UUID serverId, String serverName, boolean online, boolean removable, long lastOnlineTime) Creates a status object encapsulating the specified information.

Method Summary

Modifier and Type	Method and Description
long	getLastOnlineTime() Returns the last time at which the server registered itself with the cluster.
UUID	getServerId() Returns the unique identifier that identifies the server within the cluster.
String	getServerName() Returns a human-readable identifier for the server.
boolean	isOnline() Tells whether this server is currently online.
boolean	isRemovable() Tells whether this server has been offline for a sufficient amount of time so that it may be removed.

Methods inherited from class java.lang.Object

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

Constructor Detail

ServerStatus

public ServerStatus(UUID serverId,
                    String serverName,
                    boolean online,
                    boolean removable,
                    long lastOnlineTime)

Creates a status object encapsulating the specified information.

Parameters:

serverId - unique identifier identifying the server.

serverName - human-readable identifier for the server. Typically, this is the server's host-name. For technical reasons, there is no guarantee that this identifier is unique.

online - true if the server is online, false if it is offline.

removable - true if the server has been offline for a sufficient amount of time and may be removed, false otherwise.

lastOnlineTime - last time the server registered itself with the cluster. The time is specified as the number of milliseconds since January 1st, 1970, 00:00:00 UTC. The time is according to the local clock of the server.

Method Detail

getLastOnlineTime

public long getLastOnlineTime()

Returns the last time at which the server registered itself with the cluster. The time is specified as the number of milliseconds since January 1st, 1970, 00:00:00 UTC. The time is retrieved from the local clock of the server at the time of registration, so it might not be accurate.

Returns:

last registration time for the server.

isOnline

public boolean isOnline()

Tells whether this server is currently online.

Returns:

true if the server is online, false if it is offline.

isRemovable

public boolean isRemovable()

Tells whether this server has been offline for a sufficient amount of time so that it may be removed. If this method returns true, it implies that isOnline() returns false.

Returns:

true if the server has been offline long enough so that it may be removed, false otherwise.

getServerId

public UUID getServerId()

Returns the unique identifier that identifies the server within the cluster.

Returns:

unique identifier identifying the server.

getServerName

public String getServerName()

Returns a human-readable identifier for the server. Typically, this is the server's host-name. For technical reasons, there is no guarantee that this identifier is unique.

Returns:

human-readable identifier for the server.