Java Doc for Selector.java in  » Apache-Harmony-Java-SE » java-package » java » nio » channels » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Apache Harmony Java SE » java package » java.nio.channels   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    java.nio.channels.Selector All known Subclasses:   java.nio.channels.spi.AbstractSelector, Selector abstract public class Selector (Code) A controller for selection of SelectableChannel objects. Selectable channels can be registered with a selector, and get SelectionKey as a linkage. The keys are also added to the selector's keyset. The SelectionKey can be cancelled so that the corresponding channel is no longer registered with the selector. By invoking the select operation, the keyset is checked and all keys that are cancelled since last select operation are moved to cancelledKey set. During the select operation, the channels registered with this selector are checked to see whether they are ready for operation according to their interesting operation. Constructor Summary protected   Selector()      The constructor. Method Summary abstract public  void close()      Closes this selector. abstract public  boolean isOpen()      Tells whether this selector is open. abstract public  Set<SelectionKey> keys()      Gets the set of registered keys. public static  Selector open()      The factory method for selector. abstract public  SelectorProvider provider()      Gets the provider of this selector. abstract public  int select()      Detects if any of the registered channels are ready for I/O operations according to their interesting operation. abstract public  int select(long timeout)      Detects if any of the registered channels are ready for I/O operations according to their interesting operation.This operation will not return until some of the channels are ready or wakeup is invoked or timeout expired. abstract public  int selectNow()      Detects if any of the registered channels are ready for I/O operations according to their interesting operation.This operation will not return immediately. abstract public  Set<SelectionKey> selectedKeys()      Gets the keys whose channels are ready for operation. abstract public  Selector wakeup()      Forces the blocked select operation to return immediately. Constructor Detail Selector protected Selector()(Code) The constructor. Method Detail close abstract public void close() throws IOException(Code) Closes this selector. throws:   IOException - if I/O error occurs isOpen abstract public boolean isOpen()(Code) Tells whether this selector is open. true if this selector is not closed keys abstract public Set<SelectionKey> keys()(Code) Gets the set of registered keys. the keyset of registered keys open public static Selector open() throws IOException(Code) The factory method for selector. a new selector throws:   IOException - if I/O error occurs provider abstract public SelectorProvider provider()(Code) Gets the provider of this selector. the provider of this selector select abstract public int select() throws IOException(Code) Detects if any of the registered channels are ready for I/O operations according to their interesting operation. This operation will not return until some of the channels are ready or wakeup is invoked. the number of channels that are ready for operation throws:   IOException - if I/O error occurs throws:   ClosedSelectorException - If the selector is closed select abstract public int select(long timeout) throws IOException(Code) Detects if any of the registered channels are ready for I/O operations according to their interesting operation.This operation will not return until some of the channels are ready or wakeup is invoked or timeout expired. Parameters:   timeout - the timeout in millisecond the number of channels that are ready for operation throws:   IOException - if I/O error occurs throws:   ClosedSelectorException - If the selector is closed throws:   IllegalArgumentException - If the given timeout argument is less than zero selectNow abstract public int selectNow() throws IOException(Code) Detects if any of the registered channels are ready for I/O operations according to their interesting operation.This operation will not return immediately. the number of channels that are ready for operation throws:   IOException - if I/O error occur throws:   ClosedSelectorException - If the selector is closed selectedKeys abstract public Set<SelectionKey> selectedKeys()(Code) Gets the keys whose channels are ready for operation. the keys whose channels are ready for operation wakeup abstract public Selector wakeup()(Code) Forces the blocked select operation to return immediately. If no select operation is blocked currently, the next select operation shall return immediately. this selector throws:   ClosedSelectorException - If the selector is closed Methods inherited from java.lang.Object protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object object)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final public Class<? extends Object> getClass()(Code)(Java Doc) public int hashCode()(Code)(Java Doc) final public void notify()(Code)(Java Doc) final public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final public void wait(long millis, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait(long millis) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)