public abstract class AsynchronousChannelProvider extends Object
An asynchronous channel 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.
All of the methods in this class are safe for use by multiple concurrent threads.
| Modifier | Constructor and Description |
|---|---|
protected |
AsynchronousChannelProvider()
Initializes a new instance of this class.
|
| Modifier and Type | Method and Description |
|---|---|
abstract AsynchronousChannelGroup |
openAsynchronousChannelGroup(ExecutorService executor,
int initialSize)
Constructs a new asynchronous channel group with the given thread pool.
|
abstract AsynchronousChannelGroup |
openAsynchronousChannelGroup(int nThreads,
ThreadFactory threadFactory)
Constructs a new asynchronous channel group with a fixed thread pool.
|
abstract AsynchronousServerSocketChannel |
openAsynchronousServerSocketChannel(AsynchronousChannelGroup group)
Opens an asynchronous server-socket channel.
|
abstract AsynchronousSocketChannel |
openAsynchronousSocketChannel(AsynchronousChannelGroup group)
Opens an asynchronous socket channel.
|
static AsynchronousChannelProvider |
provider()
Returns the system-wide default asynchronous channel provider for this
invocation of the Java virtual machine.
|
protected AsynchronousChannelProvider()
SecurityException - If a security manager has been installed and it denies
RuntimePermission("asynchronousChannelProvider")public static AsynchronousChannelProvider provider()
The first invocation of this method locates the default provider object as follows:
If the system property java.nio.channels.spi.AsynchronousChannelProvider 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.
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.AsynchronousChannelProvider 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.
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.
public abstract AsynchronousChannelGroup openAsynchronousChannelGroup(int nThreads, ThreadFactory threadFactory) throws IOException
nThreads - The number of threads in the poolthreadFactory - The factory to use when creating new threadsIllegalArgumentException - If nThreads <= 0IOException - If an I/O error occursAsynchronousChannelGroup.withFixedThreadPool(int, java.util.concurrent.ThreadFactory)public abstract AsynchronousChannelGroup openAsynchronousChannelGroup(ExecutorService executor, int initialSize) throws IOException
executor - The thread poolinitialSize - A value >=0 or a negative value for implementation
specific defaultIOException - If an I/O error occursAsynchronousChannelGroup.withCachedThreadPool(java.util.concurrent.ExecutorService, int)public abstract AsynchronousServerSocketChannel openAsynchronousServerSocketChannel(AsynchronousChannelGroup group) throws IOException
group - The group to which the channel is bound, or null to
bind to the default groupIllegalChannelGroupException - If the provider that created the group differs from this providerShutdownChannelGroupException - The group is shutdownIOException - If an I/O error occurspublic abstract AsynchronousSocketChannel openAsynchronousSocketChannel(AsynchronousChannelGroup group) throws IOException
group - The group to which the channel is bound, or null to
bind to the default groupIllegalChannelGroupException - If the provider that created the group differs from this providerShutdownChannelGroupException - The group is shutdownIOException - If an I/O error occurs Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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