AsyncInvocationInterceptor (Eclipse MicroProfile 4.1)

```
public interface AsyncInvocationInterceptor
```
Implementations of this interface can intercept asynchronous method invocations. The MP Rest Client implementation runtime will obtain instances of this interface by invoking the newInterceptor method of all registered AsyncInvocationInterceptorFactory providers. The MP Rest Client implementation runtime will invoke the pre method on the main thread prior to returning execution back to the calling method of the client interface. The runtime will invoke the prepareContext method on the invocation thread before the client request is sent. The prepareContext method should always be invoked before the applyContext method is invoked, but due to the nature of multithreading, it is possible that applyContext method may be invoked before the prepareContext method has completed. Care should be taken when implementing this interface to avoid race conditions and deadlocks. Note that the order in which instances of the AsyncInvocationInterceptor are invoked are determined by the priority of the AsyncInvocationInterceptorFactory provider. Note that the main and secondary threads handling the request/response may be the same. It depends on how the implementation chooses to implement the asynchronous handling.

Since:

1.1

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`applyContext()`	This method will be invoked by the MP Rest Client runtime on the "async" thread (i.e. the thread used to actually invoke the remote service and wait for the response) prior to sending the request.
`void`	`prepareContext()`	This method will be invoked by the MP Rest Client runtime on the "main" thread (i.e. the thread calling the async Rest Client interface method) prior to returning control to the calling method.
`void`	`removeContext()`	This method will be invoked by the MP Rest Client runtime on the "async" thread (i.e. the thread used to actually invoke the remote service and wait for the response) after all providers on the inbound response flow have been invoked.

- Method Detail
  - prepareContext
```
void prepareContext()
```
    This method will be invoked by the MP Rest Client runtime on the "main" thread (i.e. the thread calling the async Rest Client interface method) prior to returning control to the calling method.
  - applyContext
```
void applyContext()
```
    This method will be invoked by the MP Rest Client runtime on the "async" thread (i.e. the thread used to actually invoke the remote service and wait for the response) prior to sending the request.
  - removeContext
```
void removeContext()
```
    This method will be invoked by the MP Rest Client runtime on the "async" thread (i.e. the thread used to actually invoke the remote service and wait for the response) after all providers on the inbound response flow have been invoked.
    
    Since:
    
    1.2