PubrelInboundInterceptor (HiveMQ Extension SDK 4.27.0 API)

All Superinterfaces:

Interceptor

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface PubrelInboundInterceptor
extends Interceptor
```
Interface for the inbound PUBREL interception.
Interceptors are always called by the same Thread for all messages from the same client.
If the same instance is shared between multiple clients it can be called in different Threads and must therefore be thread-safe.
When the method onInboundPubrel(PubrelInboundInput, PubrelInboundOutput) throws an exception or a call to PubrelInboundOutput.async(Duration) times out with TimeoutFallback.FAILURE, HiveMQ will ignore this interceptor and will:
1. Log the exception
2. Revert the changes to the ModifiablePubrelPacket made by the interceptor
3. Call the next PubrelInboundInterceptor or send the PUBREL to the server if no interceptor is left
Since:

4.3.0, CE 2020.1

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onInboundPubrel(@NotNull PubrelInboundInput pubrelInboundInput, @NotNull PubrelInboundOutput pubrelInboundOutput)`	When a `PubrelInboundInterceptor` is set through any extension, this method gets called for every inbound PUBREL packet from any MQTT client.

- Method Detail
  - onInboundPubrel
```
void onInboundPubrel(@NotNull PubrelInboundInput pubrelInboundInput,
                     @NotNull PubrelInboundOutput pubrelInboundOutput)
```
    When a PubrelInboundInterceptor is set through any extension, this method gets called for every inbound PUBREL packet from any MQTT client.
    When the extension is enabled after HiveMQ is already running, this method will also be called for future PUBRELs of clients that are already connected.
    
    Parameters:
    
    pubrelInboundInput - The PubrelInboundInput parameter.
    
    pubrelInboundOutput - The PubrelInboundOutput parameter.
    
    Since:
    
    4.3.0, CE 2020.1