Package com.inductiveautomation.gateway.tags.history.tsdb.localhistorian

Class InternalDbSyncIdTracker

java.lang.Object

com.inductiveautomation.gateway.tags.history.tsdb.localhistorian.InternalDbSyncIdTracker

All Implemented Interfaces:

SyncIdTracker

public class InternalDbSyncIdTracker
extends java.lang.Object
implements SyncIdTracker

This class tracks the last local historian id sync'd to remote systems. The value is keyed off of the provider name, the remote server name, and the remote provider name. Since the historians are local, we don't sync the storage through redundancy. If we start allowing sync of outside historians, this could get tricky and we'd probably need a different implementation. Also, we book keep the trackers in an interesting way to ensure that we never have two of them trying to read and store for the same row at a time.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	InternalDbSyncIdTracker.SyncIdRecord

Method Summary

Modifier and Type	Method	Description
long	getLastSyncId()
static InternalDbSyncIdTracker	getOrCreate(GatewayContext context, java.lang.String historyProvider, java.lang.String remoteServer, java.lang.String remoteProvider)
void	setLastSyncId(long value)

Methods inherited from class java.lang.Object

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

Method Detail

getOrCreate

public static InternalDbSyncIdTracker getOrCreate(GatewayContext context,
                                                  java.lang.String historyProvider,
                                                  java.lang.String remoteServer,
                                                  java.lang.String remoteProvider)
                                           throws java.lang.Exception

Throws:

java.lang.Exception

getLastSyncId

public long getLastSyncId()

Specified by:

getLastSyncId in interface SyncIdTracker

setLastSyncId

public void setLastSyncId(long value)

Specified by:

setLastSyncId in interface SyncIdTracker