Interface AsyncExecChainHandler

All Known Implementing Classes:

AsyncCachingExec, AsyncConnectExec, AsyncHttpRequestRetryExec, AsyncProtocolExec, AsyncRedirectExec, H2AsyncMainClientExec, HttpAsyncMainClientExec

@Contract(threading=STATELESS)
public interface AsyncExecChainHandler

Abstract request execution handler in an asynchronous client side request execution chain. Handlers can either be a decorator around another element that implements a cross cutting aspect or a self-contained executor capable of producing a response for the given request.

For information regarding the handler chain behaviour in case of a request re-execution, please refer to the AsyncHttpRequestRetryExec javadoc.

Well known request execution handlers could be referred to by name using one of the ChainElement enum values.

Since:

5.0

See Also:

• ChainElement
• HttpAsyncClientBuilder.addExecInterceptorFirst(String, AsyncExecChainHandler)
• HttpAsyncClientBuilder.addExecInterceptorBefore(String, String, AsyncExecChainHandler)
• HttpAsyncClientBuilder.addExecInterceptorAfter(String, String, AsyncExecChainHandler)
• HttpAsyncClientBuilder.addExecInterceptorLast(String, AsyncExecChainHandler)

Method Summary

Modifier and Type	Method	Description
void	execute(org.apache.hc.core5.http.HttpRequest request, org.apache.hc.core5.http.nio.AsyncEntityProducer entityProducer, AsyncExecChain.Scope scope, AsyncExecChain chain, AsyncExecCallback asyncExecCallback)	Executes the actual HTTP request.

Method Details

execute

void execute(org.apache.hc.core5.http.HttpRequest request,
 org.apache.hc.core5.http.nio.AsyncEntityProducer entityProducer,
 AsyncExecChain.Scope scope,
 AsyncExecChain chain,
 AsyncExecCallback asyncExecCallback)
      throws org.apache.hc.core5.http.HttpException,
IOException

Executes the actual HTTP request. The handler can choose to return a response message immediately inside the call or asynchronously at some later point or delegate request execution to the next element in the execution chain.

Parameters:

request - the actual request.

entityProducer - the request entity producer or null if the request does not enclose an entity.

scope - the execution scope .

chain - the next element in the request execution chain.

asyncExecCallback - the execution callback.

Throws:

org.apache.hc.core5.http.HttpException

IOException