Syncable

All Known Implementing Classes:

SQLiteHistorian
```
public interface Syncable
```
This interface provides sync'ing functions for a historian. "Syncing" means that we can query data in a way that ensures we will get everything, and not get repeat data, in order to send it or store it to a different location.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`getSyncableData(long syncId)`	Returns the number of data points that could be synchronized from the given point.
`long`	`getSyncIdTimestamp(long syncId)`	Returns the timestamp of the start of the sync group.
`boolean`	`hasSyncableData(long syncId)`	Returns whether there is data available to sync based on the provided id.
`SyncQueryResults`	`sync(long syncId)`	This returns a set of data- it's up to the implementation to decide what makes sense.

- Method Detail
  - hasSyncableData
```
boolean hasSyncableData(long syncId)
```
    Returns whether there is data available to sync based on the provided id.
  - getSyncableData
```
int getSyncableData(long syncId)
```
    Returns the number of data points that could be synchronized from the given point.
  - getSyncIdTimestamp
```
long getSyncIdTimestamp(long syncId)
```
    Returns the timestamp of the start of the sync group.
  - sync
```
SyncQueryResults sync(long syncId)
```
    This returns a set of data- it's up to the implementation to decide what makes sense. If the caller wants more data, it can just call again.
    
    Parameters:
    
    syncId - if 0, returns next set of available data based on last query. Otherwise, starts at the given time period.