java.lang.Object | |
↳ | org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager |
Manages a pool of client connections
.
This class is derived from MultiThreadedHttpConnectionManager
in HttpClient 3. See there for original authors.
Fields | |||||||||||
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connOperator | The operator for opening and updating connections. | ||||||||||
connectionPool | The pool of connections being managed. | ||||||||||
schemeRegistry | The schemes supported by this connection manager. |
Public Constructors | |||||||||||
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Creates a new thread safe 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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Gets the total number of pooled connections for the given route.
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Gets the total number of pooled connections.
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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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Hook for creating the connection operator.
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Hook for creating the connection pool.
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Invoked when the garbage collector has detected that this instance is no longer reachable.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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From interface
org.apache.http.conn.ClientConnectionManager
|
The operator for opening and updating connections.
The pool of connections being managed.
The schemes supported by this connection manager.
Creates a new thread safe connection manager.
params | the parameters for this manager |
---|---|
schreg | the scheme 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.
idleTimeout | the idle time of connections to be closed |
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tunit | the unit for the idletime |
Gets the total number of pooled connections for the given route. This is the total number of connections that have been created and are still in use by this connection manager for the route. This value will not exceed the maximum number of connections per host.
route | the route in question |
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Gets the total number of pooled connections. This is the total number of connections that have been created and are still in use by this connection manager. This value will not exceed the maximum number of connections in total.
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 |
---|---|
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.
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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Hook for creating the connection pool.
Invoked when the garbage collector has detected that this instance is no longer reachable. The default implementation does nothing, but this method can be overridden to free resources.
Note that objects that override finalize
are significantly more expensive than
objects that don't. Finalizers may be run a long time after the object is no longer
reachable, depending on memory pressure, so it's a bad idea to rely on them for cleanup.
Note also that finalizers are run on a single VM-wide finalizer thread,
so doing blocking work in a finalizer is a bad idea. A finalizer is usually only necessary
for a class that has a native peer and needs to call a native method to destroy that peer.
Even then, it's better to provide an explicit close
method (and implement
Closeable
), and insist that callers manually dispose of instances. This
works well for something like files, but less well for something like a BigInteger
where typical calling code would have to deal with lots of temporaries. Unfortunately,
code that creates lots of temporaries is the worst kind of code from the point of view of
the single finalizer thread.
If you must use finalizers, consider at least providing your own
ReferenceQueue
and having your own thread process that queue.
Unlike constructors, finalizers are not automatically chained. You are responsible for
calling super.finalize()
yourself.
Uncaught exceptions thrown by finalizers are ignored and do not terminate the finalizer thread. See Effective Java Item 7, "Avoid finalizers" for more.
Throwable |
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