PersistenceService (Siddhi Core 4.0.0-alpha25 API)

```
public class PersistenceService
extends Object
```
Persistence Service is the service layer to handle state persistence tasks such as persisting current state and restoring previous states.

Constructors
Constructor and Description
`PersistenceService(SiddhiAppContext siddhiAppContext)`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`String`	`persist()`
`void`	`restore(byte[] snapshot)`
`String`	`restoreLastRevision()`
`void`	`restoreRevision(String revision)`

public PersistenceService(SiddhiAppContext siddhiAppContext)

public void restoreRevision(String revision)
                     throws CannotRestoreSiddhiAppStateException

public String restoreLastRevision()
                           throws CannotRestoreSiddhiAppStateException

public void restore(byte[] snapshot)
             throws CannotRestoreSiddhiAppStateException

Class PersistenceService