InitializeOnMaster (Flink : Core 1.18.1-cp1 API)

All Known Implementing Classes:

BinaryOutputFormat, FileOutputFormat, SerializedOutputFormat
```
@Public
public interface InitializeOnMaster
```
This interface may be implemented by OutputFormats to have the master initialize them globally.
For example, the FileOutputFormat implements this behavior for distributed file systems and creates/deletes target directories if necessary.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`initializeGlobal(int parallelism)`	The method is invoked on the master (JobManager) before the distributed program execution starts.

- Method Detail
  - initializeGlobal
```
void initializeGlobal(int parallelism)
               throws IOException
```
    The method is invoked on the master (JobManager) before the distributed program execution starts.
    
    Parameters:
    
    parallelism - The parallelism with which the format or functions will be run.
    
    Throws:
    
    IOException - The initialization may throw exceptions, which may cause the job to abort.