GraphProcessingObserver (SNAP Engine API)

All Known Implementing Classes:

CommandLineTool
```
public interface GraphProcessingObserver
```
This interface can be implemented and added to the GraphProcessor to get informed about processing steps of a graph.

Since:

4.1

See Also:

GraphProcessor.addObserver(GraphProcessingObserver)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`graphProcessingStarted(GraphContext graphContext)`	It is invoked when the graph starts its processing.
`void`	`graphProcessingStopped(GraphContext graphContext)`	It is invoked when the graph stops its processing.
`void`	`tileProcessingStarted(GraphContext graphContext, Rectangle tileRectangle)`	It is invoked when the processing of the rectangle starts.
`void`	`tileProcessingStopped(GraphContext graphContext, Rectangle tileRectangle)`	It is invoked when the processing of the rectangle is done.

- Method Detail
  - graphProcessingStarted
```
void graphProcessingStarted(GraphContext graphContext)
```
    It is invoked when the graph starts its processing.
    
    Parameters:
    
    graphContext - the graph context being processed
  - graphProcessingStopped
```
void graphProcessingStopped(GraphContext graphContext)
```
    It is invoked when the graph stops its processing.
    
    Parameters:
    
    graphContext - the graph context being processed
  - tileProcessingStarted
```
void tileProcessingStarted(GraphContext graphContext,
                           Rectangle tileRectangle)
```
    It is invoked when the processing of the rectangle starts.
    
    Parameters:
    
    graphContext - the graph context being processed
    
    tileRectangle - the rectangle currently processed
  - tileProcessingStopped
```
void tileProcessingStopped(GraphContext graphContext,
                           Rectangle tileRectangle)
```
    It is invoked when the processing of the rectangle is done.
    
    Parameters:
    
    graphContext - the graph context being processed
    
    tileRectangle - the rectangle currently processed