November 7, 2024
July 31, 2023
AbstractInterruptibleChannel (Java SE 22 & JDK 22) in Java with Examples.
You will find code samples for most of the AbstractInterruptibleChannel methods.
Summary
Base implementation class for interruptible channels.
try (final var executor = Executors.newSingleThreadExecutor()) {
final var future = executor.submit(() -> {
try (final var channel = ServerSocketChannel.open()) {
System.out.println("AbstractInterruptibleChannel : "
+ (channel instanceof AbstractInterruptibleChannel));
System.out.println("bind ...");
channel.bind(new InetSocketAddress("127.0.0.1", 8000));
System.out.println("bind OK!");
System.out.println("accept ...");
channel.accept();
System.out.println("accept OK!");
} catch (ClosedByInterruptException e) {
System.out.println("ClosedByInterruptException!");
} catch (IOException e) {
System.out.println("IOException!");
}
});
TimeUnit.SECONDS.sleep(2);
System.out.println("-- future.cancel --");
future.cancel(true);
}
// Result
// ↓
//AbstractInterruptibleChannel : true
//bind ...
//bind OK!
//accept ...
//-- future.cancel --
//ClosedByInterruptException!
try (final var executor = Executors.newSingleThreadExecutor()) {
try (final var channel = ServerSocketChannel.open()) {
executor.submit(() -> {
try {
System.out.println("bind ...");
channel.bind(new InetSocketAddress("127.0.0.1", 8000));
System.out.println("bind OK!");
System.out.println("accept ...");
channel.accept();
System.out.println("accept OK!");
} catch (AsynchronousCloseException e) {
System.out.println("AsynchronousCloseException!");
} catch (IOException e) {
System.out.println("IOException!");
}
});
TimeUnit.SECONDS.sleep(2);
System.out.println("-- channel.close --");
}
}
// Result
// ↓
//bind ...
//bind OK!
//accept ...
//-- channel.close --
//AsynchronousCloseException!
Constructors
AbstractInterruptibleChannel ()
Initializes a new instance of this class.
protected. I think it's rare to create a subclass of this class. Therefore, the code example is omitted.
Methods
protected final void begin ()
Marks the beginning of an I/O operation that might block indefinitely.
protected. I think it's rare to create a subclass of this class. Therefore, the code example is omitted.
final void close ()
Closes this channel.
final var path = Path.of("R:", "java-work", "test.data");
System.out.println(path); // R:\java-work\test.data
AbstractInterruptibleChannel channel;
try (final var fc = FileChannel.open(path,
StandardOpenOption.CREATE, StandardOpenOption.WRITE)) {
channel = fc;
System.out.println(channel.isOpen()); // true
}
System.out.println(channel.isOpen()); // false
// An example without a try-with-resources statement.
final var path = Path.of("R:", "java-work", "test.data");
System.out.println(path); // R:\java-work\test.data
final AbstractInterruptibleChannel channel = FileChannel.open(path,
StandardOpenOption.CREATE, StandardOpenOption.WRITE);
try {
System.out.println(channel.isOpen()); // true
} finally {
channel.close();
}
System.out.println(channel.isOpen()); // false
protected final void end (boolean completed)
Marks the end of an I/O operation that might block indefinitely.
protected. I think it's rare to create a subclass of this class. Therefore, the code example is omitted.
protected abstract void implCloseChannel ()
Closes this channel.
protected. I think it's rare to create a subclass of this class. Therefore, the code example is omitted.
final boolean isOpen ()
Tells whether or not this channel is open.
final var path = Path.of("R:", "java-work", "test.data");
System.out.println(path); // R:\java-work\test.data
AbstractInterruptibleChannel channel;
try (final var fc = FileChannel.open(path,
StandardOpenOption.CREATE, StandardOpenOption.WRITE)) {
channel = fc;
System.out.println(channel.isOpen()); // true
}
System.out.println(channel.isOpen()); // false
// An example without a try-with-resources statement.
final var path = Path.of("R:", "java-work", "test.data");
System.out.println(path); // R:\java-work\test.data
final AbstractInterruptibleChannel channel = FileChannel.open(path,
StandardOpenOption.CREATE, StandardOpenOption.WRITE);
try {
System.out.println(channel.isOpen()); // true
} finally {
channel.close();
}
System.out.println(channel.isOpen()); // false