# Package org.apache.http.impl.execchain

HTTP request execution chain APIs.

See: Description

Interface Summary
Interface | Description
--- | ---
ClientExecChain | This interface represents an element in the HTTP request execution chain.

Class Summary
Class | Description
--- | ---
BackoffStrategyExec |
MainClientExec | The last request executor in the HTTP request execution chain that is responsible for execution of request / response exchanges with the opposite endpoint.
MinimalClientExec | Request executor that implements the most fundamental aspects of the HTTP specification and the most straight-forward request / response exchange with the target server.
ProtocolExec | Request executor in the request execution chain that is responsible for implementation of HTTP specification requirements.
RedirectExec | Request executor in the request execution chain that is responsible for handling of request redirects.
RetryExec | Request executor in the request execution chain that is responsible for making a decision whether a request failed due to an I/O error should be re-executed.
ServiceUnavailableRetryExec | Request executor in the request execution chain that is responsible for making a decision whether a request that received a non-2xx response from the target server should be re-executed.

Exception Summary
Exception | Description
--- | ---
RequestAbortedException | Signals that the request has been aborted.
TunnelRefusedException | Signals that the tunnel request was rejected by the proxy host.

## Package org.apache.http.impl.execchain Description

HTTP request execution chain APIs.