java.lang.Object | |
↳ | org.apache.http.impl.conn.SingleClientConnManager |
A connection "manager" for a single connection.
This manager is good only for single-threaded use.
Allocation always returns the connection immediately,
even if it has not been released after the previous allocation.
In that case, a warning
is logged
and the previously issued connection is revoked.
This class is derived from SimpleHttpConnectionManager
in HttpClient 3. See there for original authors.
Nested Classes | |||||||||||
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SingleClientConnManager.ConnAdapter | The connection adapter used by this manager. | ||||||||||
SingleClientConnManager.PoolEntry | The pool entry for this connection manager. |
Constants | |||||||||||
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String | MISUSE_MESSAGE | The message to be logged on multiple allocation. |
Fields | |||||||||||
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alwaysShutDown | Whether the connection should be shut down on release. | ||||||||||
connOperator | The operator for opening and updating connections. | ||||||||||
connectionExpiresTime | The time the last released connection expires and shouldn't be reused. | ||||||||||
isShutDown | Indicates whether this connection manager is shut down. | ||||||||||
lastReleaseTime | The time of the last connection release, or -1. | ||||||||||
managedConn | The currently issued managed connection, if any. | ||||||||||
schemeRegistry | The schemes supported by this connection manager. | ||||||||||
uniquePoolEntry | The one and only entry in this pool. |
Public Constructors | |||||||||||
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Creates a new simple connection manager.
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Public Methods | |||||||||||
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Closes all expired connections in the pool.
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Closes idle connections in the pool.
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Obtains a connection.
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Obtains the scheme registry used by this manager.
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Releases a connection for use by others.
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Returns a new
ClientConnectionRequest , from which a
ManagedClientConnection can be obtained or the request can be
aborted. | |||||||||||
Shuts down this connection manager and releases allocated resources.
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Protected Methods | |||||||||||
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Asserts that this manager is not shut down.
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Hook for creating the connection operator.
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Called before the object's memory is reclaimed by the VM.
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Revokes the currently issued connection.
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[Expand]
Inherited Methods | |||||||||||
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From class java.lang.Object
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From interface org.apache.http.conn.ClientConnectionManager
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The message to be logged on multiple allocation.
Whether the connection should be shut down on release.
The operator for opening and updating connections.
The time the last released connection expires and shouldn't be reused.
Indicates whether this connection manager is shut down.
The currently issued managed connection, if any.
The schemes supported by this connection manager.
The one and only entry in this pool.
Creates a new simple connection manager.
params | the parameters for this manager |
---|---|
schreg | the scheme registry, or
null for the default registry
|
Closes all expired connections in the pool. Open connections in the pool that have not been used for the timespan defined when the connection was released will be closed. Currently allocated connections are not subject to this method. Times will be checked with milliseconds precision.
Closes idle connections in the pool. Open connections in the pool that have not been used for the timespan given by the argument will be closed. Currently allocated connections are not subject to this method. Times will be checked with milliseconds precision All expired connections will also be closed.
idletime | the idle time of connections to be closed |
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tunit | the unit for the idletime |
Obtains a connection. This method does not block.
route | where the connection should point to |
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Obtains the scheme registry used by this manager.
null
Releases a connection for use by others. You may optionally specify how long the connection is valid to be reused. Values <= 0 are considered to be valid forever. If the connection is not marked as reusable, the connection will not be reused regardless of the valid duration. If the connection has been released before, the call will be ignored.
conn | the connection to release |
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validDuration | the duration of time this connection is valid for reuse |
timeUnit | the unit of time validDuration is measured in |
Returns a new ClientConnectionRequest
, from which a
ManagedClientConnection
can be obtained or the request can be
aborted.
Shuts down this connection manager and releases allocated resources. This includes closing all connections, whether they are currently used or not.
Asserts that this manager is not shut down.
IllegalStateException | if this manager is shut down |
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Hook for creating the connection operator.
It is called by the constructor.
Derived classes can override this method to change the
instantiation of the operator.
The default implementation here instantiates
DefaultClientConnectionOperator
.
schreg | the scheme registry to use, or null |
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Called before the object's memory is reclaimed by the VM. This can only happen once the garbage collector has detected that the object is no longer reachable by any thread of the running application.
The method can be used to free system resources or perform other cleanup
before the object is garbage collected. The default implementation of the
method is empty, which is also expected by the VM, but subclasses can
override finalize()
as required. Uncaught exceptions which are
thrown during the execution of this method cause it to terminate
immediately but are otherwise ignored.
Note that the VM does guarantee that finalize()
is called at most
once for any object, but it doesn't guarantee when (if at all) finalize()
will be called. For example, object B's finalize()
can delay the execution of object A's finalize()
method and
therefore it can delay the reclamation of A's memory. To be safe, use a
ReferenceQueue
, because it provides more control
over the way the VM deals with references during garbage collection.
Throwable |
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Revokes the currently issued connection. The adapter gets disconnected, the connection will be shut down.