NIO2 API

org.classpath.icedtea.java.nio.channels.spi
Class SelectorProvider

java.lang.Object
  extended by java.nio.channels.spi.SelectorProvider
      extended by org.classpath.icedtea.java.nio.channels.spi.SelectorProvider

public abstract class SelectorProvider
extends java.nio.channels.spi.SelectorProvider

Service-provider class for selectors and selectable channels.

A selector provider is a concrete subclass of this class that has a zero-argument constructor and implements the abstract methods specified below. A given invocation of the Java virtual machine maintains a single system-wide default provider instance, which is returned by the provider method. The first invocation of that method will locate the default provider as specified below.

The system-wide default provider is used by the static open methods of the DatagramChannel, Pipe, Selector, ServerSocketChannel, and SocketChannel classes. It is also used by the System.inheritedChannel() method. A program may make use of a provider other than the default provider by instantiating that provider and then directly invoking the open methods defined in this class.

All of the methods in this class are safe for use by multiple concurrent threads.

Since:
1.4

Constructor Summary
SelectorProvider()
           
 
Method Summary
abstract  DatagramChannel openDatagramChannel()
          Opens a datagram channel.
abstract  DatagramChannel openDatagramChannel(ProtocolFamily family)
           Opens a datagram channel.
static SelectorProvider provider()
          Returns the system-wide default selector provider for this invocation of the Java virtual machine.
 
Methods inherited from class java.nio.channels.spi.SelectorProvider
inheritedChannel, openPipe, openSelector, openServerSocketChannel, openSocketChannel
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SelectorProvider

public SelectorProvider()
Method Detail

openDatagramChannel

public abstract DatagramChannel openDatagramChannel()
                                             throws java.io.IOException
Opens a datagram channel.

Specified by:
openDatagramChannel in class java.nio.channels.spi.SelectorProvider
Returns:
The new channel
Throws:
java.io.IOException

openDatagramChannel

public abstract DatagramChannel openDatagramChannel(ProtocolFamily family)
                                             throws java.io.IOException
Opens a datagram channel.

Parameters:
family - The protocol family
Returns:
A new datagram channel
Throws:
java.lang.UnsupportedOperationException - If the specified protocol family is not supported
java.io.IOException - If an I/O error occurs
Since:
1.7

provider

public static SelectorProvider provider()
Returns the system-wide default selector provider for this invocation of the Java virtual machine.

The first invocation of this method locates the default provider object as follows:

  1. If the system property java.nio.channels.spi.SelectorProvider is defined then it is taken to be the fully-qualified name of a concrete provider class. The class is loaded and instantiated; if this process fails then an unspecified error is thrown.

  2. If a provider class has been installed in a jar file that is visible to the system class loader, and that jar file contains a provider-configuration file named java.nio.channels.spi.SelectorProvider in the resource directory META-INF/services, then the first class name specified in that file is taken. The class is loaded and instantiated; if this process fails then an unspecified error is thrown.

  3. Finally, if no provider has been specified by any of the above means then the system-default provider class is instantiated and the result is returned.

Subsequent invocations of this method return the provider that was returned by the first invocation.

Returns:
The system-wide default selector provider

NIO2 API

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Copyright 2010 Sun Microsystems, Inc. All rights reserved. Use is subject to the terms of the GNU General Public License.