org.apache.hc.client5.http.nio

Interface AsyncClientConnectionManager

All Known Implementing Classes:

PoolingAsyncClientConnectionManager

public interface AsyncClientConnectionManager

Represents a manager of persistent non-blocking client connections.

The purpose of an HTTP connection manager is to serve as a factory for new HTTP connections, manage persistent connections and synchronize access to persistent connections making sure that only one thread of execution can have access to a connection at a time.

Implementations of this interface must be thread-safe. Access to shared data must be synchronized as methods of this interface may be executed from multiple threads.

Since:

5.0

Method Summary

Modifier and Type	Method and Description
java.util.concurrent.Future<AsyncConnectionEndpoint>	connect(AsyncConnectionEndpoint endpoint, ConnectionInitiator connectionInitiator, Timeout connectTimeout, java.lang.Object attachment, HttpContext context, <any> callback) Connects the endpoint to the initial hop (connection target in case of a direct route or to the first proxy hop in case of a route via a proxy or multiple proxies).
java.util.concurrent.Future<AsyncConnectionEndpoint>	lease(java.lang.String id, HttpRoute route, java.lang.Object state, Timeout requestTimeout, <any> callback) Returns a Future object which can be used to obtain an AsyncConnectionEndpoint or to cancel the request by calling Future.cancel(boolean).
void	release(AsyncConnectionEndpoint endpoint, java.lang.Object newState, TimeValue validDuration) Releases the endpoint back to the manager making it potentially re-usable by other consumers.
void	upgrade(AsyncConnectionEndpoint endpoint, java.lang.Object attachment, HttpContext context) Upgrades transport security of the given endpoint by using the TLS security protocol.

Method Detail

lease

java.util.concurrent.Future<AsyncConnectionEndpoint> lease(java.lang.String id,
                                                           HttpRoute route,
                                                           java.lang.Object state,
                                                           Timeout requestTimeout,
                                                           <any> callback)

Returns a Future object which can be used to obtain an AsyncConnectionEndpoint or to cancel the request by calling Future.cancel(boolean).

Please note that newly allocated endpoints can be leased disconnected. The consumer of the endpoint is responsible for fully establishing the route to the endpoint target by calling #connect(AsyncConnectionEndpoint, ConnectionInitiator, Timeout, Object, HttpContext, FutureCallback) in order to connect directly to the target or to the first proxy hop, and optionally calling upgrade(AsyncConnectionEndpoint, Object, HttpContext) method to upgrade the underlying transport to Transport Layer Security after having executed a CONNECT method to all intermediate proxy hops.

Parameters:

id - unique operation ID or null.

route - HTTP route of the requested connection.

state - expected state of the connection or null if the connection is not expected to carry any state.

requestTimeout - lease request timeout.

callback - result callback.

release

void release(AsyncConnectionEndpoint endpoint,
             java.lang.Object newState,
             TimeValue validDuration)

Releases the endpoint back to the manager making it potentially re-usable by other consumers. Optionally, the maximum period of how long the manager should keep the connection alive can be defined using validDuration and timeUnit parameters.

Parameters:

endpoint - the managed endpoint.

newState - the new connection state of null if state-less.

validDuration - the duration of time this connection is valid for reuse.

connect

java.util.concurrent.Future<AsyncConnectionEndpoint> connect(AsyncConnectionEndpoint endpoint,
                                                             ConnectionInitiator connectionInitiator,
                                                             Timeout connectTimeout,
                                                             java.lang.Object attachment,
                                                             HttpContext context,
                                                             <any> callback)

Connects the endpoint to the initial hop (connection target in case of a direct route or to the first proxy hop in case of a route via a proxy or multiple proxies).

Parameters:

endpoint - the managed endpoint.

connectTimeout - connect timeout.

context - the actual HTTP context.

attachment - connect request attachment.

callback - result callback.

upgrade

void upgrade(AsyncConnectionEndpoint endpoint,
             java.lang.Object attachment,
             HttpContext context)

Upgrades transport security of the given endpoint by using the TLS security protocol.

Parameters:

endpoint - the managed endpoint.

attachment - the attachment the upgrade attachment object.

context - the actual HTTP context.