Writer

All Known Subinterfaces:

ETLDest, StoragePlugin

All Known Implementing Classes:

BlackholeStoragePlugin, ChannelArchiverReadOnlyPlugin, MergeDedupStoragePlugin, PBOverHTTPStoragePlugin, PlainPBStoragePlugin
```
public interface Writer
```
The main data consumption interface, this represents objects which take an event stream and write it to a (potentially permanent) store.

Author:

mshankar

Method Summary

Modifier and Type	Method	Description
`boolean`	`appendData(BasicContext context, String pvName, EventStream stream)`
`Event`	`getLastKnownEvent(BasicContext context, String pvName)`	Gets the last known event in this destination.

- Method Detail
  - appendData
```
boolean appendData(BasicContext context,
                   String pvName,
                   EventStream stream)
            throws IOException
```
    Throws:
    
    IOException
  - getLastKnownEvent
```
Event getLastKnownEvent(BasicContext context,
                        String pvName)
                 throws IOException
```
    Gets the last known event in this destination. Future events will be appended to this destination only if their timestamp is more recent than the timestamp of this event. If there is no last known event, then a null is returned.
    
    Parameters:
    
    context -
    
    pvName - The PV name
    
    Returns:
    
    Event The last known event of pvName
    
    Throws:
    
    IOException -