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8241072: Reimplement the Legacy DatagramSocket API

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Replace the underlying implementations of the java.net.DatagramSocket and java.net.MulticastSocket APIs with simpler and more modern implementations that are easy to maintain and debug.

Co-authored-by: Alan Bateman <alan.bateman@oracle.com>
Co-authored-by: Chris Hegarty <chris.hegarty@oracle.com>
Co-authored-by: Daniel Fuchs <daniel.fuchs@oracle.com>
Reviewed-by: alanb, chegar, dfuchs
This commit is contained in:
Patrick Concannon 2020-05-12 21:51:53 +01:00
parent 3930460af5
commit fad2cf51ba
34 changed files with 1478 additions and 909 deletions
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22
src/java.base/share/classes/sun/nio/ch/DatagramSocketAdaptor.java
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@ -74,7 +74,7 @@ public class DatagramSocketAdaptor
private volatile int timeout;
private DatagramSocketAdaptor(DatagramChannelImpl dc) throws IOException {
super(/*SocketAddress*/null);
super(/*SocketAddress*/ DatagramSockets.NO_DELEGATE);
this.dc = dc;
}
@ -769,4 +769,24 @@ public class DatagramSocketAdaptor
}
}
}
/**
* Provides access to the value of the private static DatagramSocket.NO_DELEGATE
*/
private static class DatagramSockets {
private static final SocketAddress NO_DELEGATE;
static {
try {
PrivilegedExceptionAction<Lookup> pa = () ->
MethodHandles.privateLookupIn(DatagramSocket.class, MethodHandles.lookup());
MethodHandles.Lookup l = AccessController.doPrivileged(pa);
NO_DELEGATE = (SocketAddress)
l.findStaticVarHandle(DatagramSocket.class, "NO_DELEGATE",
SocketAddress.class).get();
} catch (Exception e) {
throw new ExceptionInInitializerError(e);
}
}
}
}