org.apache.hc.client5.http.io

Interface HttpClientConnectionManager

All Known Implementing Classes:

BasicHttpClientConnectionManager, PoolingHttpClientConnectionManager

public interface HttpClientConnectionManager

Represents a manager of persistent 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:

4.3

Method Summary

Modifier and Type	Method and Description
void	connect(ConnectionEndpoint endpoint, TimeValue connectTimeout, HttpContext context) 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).
LeaseRequest	lease(java.lang.String id, HttpRoute route, Timeout requestTimeout, java.lang.Object state) Returns a LeaseRequest object which can be used to obtain a ConnectionEndpoint to cancel the request by calling LeaseRequest#cancel().
void	release(ConnectionEndpoint endpoint, java.lang.Object newState, TimeValue validDuration) Releases the endpoint back to the manager making it potentially re-usable by other consumers.
void	upgrade(ConnectionEndpoint endpoint, HttpContext context) Upgrades transport security of the given endpoint by using the TLS security protocol.

Method Detail

lease

LeaseRequest lease(java.lang.String id,
                   HttpRoute route,
                   Timeout requestTimeout,
                   java.lang.Object state)

Returns a LeaseRequest object which can be used to obtain a ConnectionEndpoint to cancel the request by calling LeaseRequest#cancel().

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(ConnectionEndpoint, TimeValue, HttpContext) in order to connect directly to the target or to the first proxy hop, and optionally calling upgrade(ConnectionEndpoint, 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.

requestTimeout - lease request timeout.

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

Since:

5.0

release

void release(ConnectionEndpoint 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

void connect(ConnectionEndpoint endpoint,
             TimeValue connectTimeout,
             HttpContext context)
      throws java.io.IOException

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.

Throws:

java.io.IOException

upgrade

void upgrade(ConnectionEndpoint endpoint,
             HttpContext context)
      throws java.io.IOException

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

Parameters:

endpoint - the managed endpoint.

context - the actual HTTP context.

Throws:

java.io.IOException