Package com.illumon.iris.db.tables.remotequery.keepalive

Class DispatcherPresenceLeaseHandler

java.lang.Object

com.illumon.iris.db.tables.remotequery.keepalive.DispatcherPresenceLeaseHandler

public class DispatcherPresenceLeaseHandler
extends Object

A DispatcherPresenceLeaseHandler manages an etcd lease that holds key-values that indicate presence to workers.

This should be used in concert with a WorkerTtlCheckJob and a AbstractWorkerStatusServlet.

Constructor Summary

Constructors

Constructor	Description
DispatcherPresenceLeaseHandler(com.fishlib.io.logger.Logger log, io.deephaven.shadow.jetcd.io.etcd.jetcd.Client client, String dispatcherNameForDiscovery, String dispatcherUrl, io.deephaven.enterprise.etcdclient.presence.PresenceKvLeaseHandler.LeaseRecreationListener leaseRecreationListener)	Manages an etcd lease for presence KVs that workers use to control their lifetime.

Method Summary

Modifier and Type	Method	Description
void	close()	Close this object.
void	deleteWorkerStatus(String processInfoId, boolean logWarningIfNoKey)	Delete the presence KV for the given processInfoId.
boolean	isClosed()	Returns true if this object has been closed.
boolean	setWorkerStatus(String processInfoId, String status)	Put a presence KV for the given processInfoId.

Methods inherited from class java.lang.Object

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

Constructor Details

DispatcherPresenceLeaseHandler

public DispatcherPresenceLeaseHandler(com.fishlib.io.logger.Logger log,
 io.deephaven.shadow.jetcd.io.etcd.jetcd.Client client,
 String dispatcherNameForDiscovery,
 String dispatcherUrl,
 io.deephaven.enterprise.etcdclient.presence.PresenceKvLeaseHandler.LeaseRecreationListener leaseRecreationListener)
                               throws ExecutionException,
InterruptedException,
TimeoutException

Manages an etcd lease for presence KVs that workers use to control their lifetime.

Parameters:

log - the log

client - the etcd client to use

dispatcherNameForDiscovery - the name of this dispatcher

dispatcherUrl - the URL that clients connect to for this dispatcher

leaseRecreationListener - the lease recreation callback

Throws:

ExecutionException - thrown by jetcd client

InterruptedException - thrown by jetcd client

TimeoutException - thrown by jetcd client

Method Details

setWorkerStatus

public boolean setWorkerStatus(String processInfoId,
 String status)

Put a presence KV for the given processInfoId.

Parameters:

processInfoId - The processInfoId whose presence KV will be created or overwritten

status - The status to write for the KV

Returns:

true if the put succeeded, false otherwise

deleteWorkerStatus

public void deleteWorkerStatus(String processInfoId,
 boolean logWarningIfNoKey)

Delete the presence KV for the given processInfoId.

Parameters:

processInfoId - The processInfoId whose presence KV will be deleted

logWarningIfNoKey - if true, emit a log warning if the key is not found; if false, ignore the key not found case.

close

public void close()

Close this object. It is safe to call close more than once, but after close has been called, no other method of this object should be called.

isClosed

public boolean isClosed()

Returns true if this object has been closed.

Returns:

true if this object has been closed