NettyConnectionWriter (Flink : Runtime 2.0-preview1 API)

All Known Implementing Classes:

NettyConnectionWriterImpl
```
public interface NettyConnectionWriter
```
NettyConnectionWriter is used by TierProducerAgent to write buffers to netty connection. Buffers in the writer will be written to a queue structure and netty server will send buffers from it.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close(Throwable error)`	If error is null, remove and recycle all buffers in the writer.
`NettyConnectionId`	`getNettyConnectionId()`	Get the id of connection in the writer.
`void`	`notifyAvailable()`	Notify the buffer is available in writer.
`int`	`numQueuedBufferPayloads()`	Get the number of written but unsent buffer netty payloads.
`int`	`numQueuedPayloads()`	Get the number of written but unsent netty payloads.
`void`	`writeNettyPayload(NettyPayload nettyPayload)`	Write a buffer to netty connection.

- Method Detail
  - writeNettyPayload
```
void writeNettyPayload(NettyPayload nettyPayload)
```
    Write a buffer to netty connection.
    
    Parameters:
    
    nettyPayload - the payload send to netty connection.
  - getNettyConnectionId
```
NettyConnectionId getNettyConnectionId()
```
    Get the id of connection in the writer.
    
    Returns:
    
    the id of connection.
  - notifyAvailable
```
void notifyAvailable()
```
    Notify the buffer is available in writer.
  - numQueuedPayloads
```
int numQueuedPayloads()
```
    Get the number of written but unsent netty payloads.
    
    Returns:
    
    the buffer number.
  - numQueuedBufferPayloads
```
int numQueuedBufferPayloads()
```
    Get the number of written but unsent buffer netty payloads.
    
    Returns:
    
    the buffer number.
  - close
```
void close(@Nullable
           Throwable error)
```
    If error is null, remove and recycle all buffers in the writer. If error is not null, the error will be written after all buffers are removed and recycled.
    
    Parameters:
    
    error - error represents the exception information.