| Package | Description | 
|---|---|
| org.apache.hc.client5.http.impl.async | Asynchronous HTTP client API implementation that supports both
 HTTP/2 and HTTP/1.1 transport. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | CloseableHttpAsyncClientBase implementation of  HttpAsyncClientthat also implementsModalCloseable. | 
| class  | InternalH2AsyncClientInternal implementation of HTTP/2 only  CloseableHttpAsyncClient. | 
| class  | InternalHttpAsyncClientInternal implementation of  CloseableHttpAsyncClientthat can negotiate
 the most optimal HTTP protocol version during during theTLShandshake
 withALPNextension if supported by the Java runtime. | 
| class  | MinimalH2AsyncClientMinimal implementation of HTTP/2 only  CloseableHttpAsyncClient. | 
| class  | MinimalHttpAsyncClientMinimal implementation of  CloseableHttpAsyncClient. | 
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