# 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.

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