| java.lang.Object | |
| ↳ | java.nio.channels.Selector |
 Known Direct Subclasses
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A controller for the selection of SelectableChannel objects.
Selectable channels can be registered with a selector and get a
SelectionKey that represents the registration. The keys are also
added to the selector's key set. Selection keys can be canceled so that the
corresponding channel is no longer registered with the selector.
By invoking the select method, the key set is checked and all keys
that have been canceled since last select operation are moved to the set of
canceled keys. During the select operation, the channels registered with this
selector are checked to see whether they are ready for operation according to
their interest set.
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Constructs a new
Selector.
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| Public Methods | |||||||||||
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Closes this selector.
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Indicates whether this selector is open.
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Gets the set of registered keys.
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Returns a selector returned by
provider()'s
openSelector() method.
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Gets the provider of this selector.
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Detects if any of the registered channels is ready for I/O operations
according to its
interest set.
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Detects if any of the registered channels is ready for I/O operations
according to its
interest set.
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Detects if any of the registered channels is ready for I/O operations
according to its
interest set.
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Gets the selection keys whose channels are ready for operation.
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Forces blocked
select operations to return immediately.
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[Expand]
Inherited Methods | |||||||||||
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From class
java.lang.Object
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From interface
java.io.Closeable
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From interface
java.lang.AutoCloseable
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Closes this selector. Ongoing calls to the select methods of this
selector will get interrupted. This interruption behaves as if the
wakeup() method of this selector is called. After this, all keys
that are still valid are invalidated and their channels are unregistered.
All resources held by this selector are released.
Any further attempt of using this selector after this method has been
called (except calling close() or wakeup()) results in
a ClosedSelectorException being thrown.
| IOException | if an I/O error occurs. |
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Indicates whether this selector is open.
Developers
true if this selector is not closed, false
otherwise.
Gets the set of registered keys.
The returned set cannot be changed directly but can be modified indirectly by operations on the Selector. It should therefore not be treated as thread-safe.
Returns a selector returned by provider()'s
openSelector() method.
| IOException | if an I/O error occurs. |
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Gets the provider of this selector.
Detects if any of the registered channels is ready for I/O operations
according to its interest set. This method does not
return until at least one channel is ready, wakeup() is
invoked or the calling thread is interrupted.
| IOException | if an I/O error occurs. |
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| ClosedSelectorException | if the selector is closed. |
Detects if any of the registered channels is ready for I/O operations
according to its interest set. This method does not
return until at least one channel is ready, wakeup() is invoked,
the calling thread is interrupted or the specified timeout
expires.
| timeout | the non-negative timeout in millisecond; 0 will block forever if no channels get ready. |
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| ClosedSelectorException | if the selector is closed. |
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| IllegalArgumentException | if the given timeout argument is less than zero. |
| IOException | if an I/O error occurs. |
Detects if any of the registered channels is ready for I/O operations
according to its interest set. This operation will
return immediately.
| IOException | if an I/O error occurrs. |
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| ClosedSelectorException | if the selector is closed. |
Gets the selection keys whose channels are ready for operation.
Keys cannot be added to the set directly. Keys can be removed. The set can be modified indirectly by operations on the Selector. It should therefore not be treated as thread-safe.
| ClosedSelectorException | if the selector is closed. |
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Forces blocked select operations to return immediately.
If no select operation is blocked when wakeup() is called
then the next select operation will return immediately. This can
be undone by a call to selectNow(); after calling
selectNow(), a subsequent call of select can block
again.
| ClosedSelectorException | if the selector is closed. |
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