IMessageHandler (Atoti Server Java API - 6.0.26)

Type Parameters:

I - The indentifier of the handled messages.

All Known Implementing Classes:

AFeedLoadingHandler, FileInfoLogMessageHandler, LogExternalFeedLoadingHandler, LogMessageHandler
```
public interface IMessageHandler<I>
```
Callback when there is an event on the message.

Author:

ActiveViam

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onError(I key, Throwable ex)`	The method that is called when there is an error.
`void`	`onMessagePublished(I key, IPublicationInfo info)`	Called after the message has been successfully published.
`void`	`onMessageStarted(I key)`	Called when the message starts.

- Method Detail
  - onMessageStarted
```
void onMessageStarted(I key)
```
    Called when the message starts.
    
    Parameters:
    
    key - the key of the message
  - onMessagePublished
```
void onMessagePublished(I key,
                        IPublicationInfo info)
```
    Called after the message has been successfully published.
    
    Parameters:
    
    key - the key of the message
    
    info - information about the publication of the message (optional, may be null if the data source does not support this feature)
  - onError
```
void onError(I key,
             Throwable ex)
```
    The method that is called when there is an error.
    This method is supposed to gracefully handle the error without failure. Particularly, throwing in this method results in an undefined behaviour, including the unexpected stoppage of the channel processing.
    
    Parameters:
    
    key - the key of the message
    
    ex - the exception