Package: gij-4.1
Version: 4.1.1-20
Severity: normal
File: /usr/bin/gij-wrapper-4.1
The java API for SelectableChannel requires that attempts to toggle
blocking mode with configureBlocking fail when a channel is registered.
This test program demonstrates that gcj fails to throw the expected
exception...
===
# first use sun jvm
[EMAIL PROTECTED]:~/java/listen$ ~/java/jdk1.5.0_10/bin/java test2
java.nio.channels.IllegalBlockingModeException
at
java.nio.channels.spi.AbstractSelectableChannel.configureBlocking(AbstractSelectableChannel.java:257)
at test2.main(test2.java:19)
# now gcj
[EMAIL PROTECTED]:~/java/listen$ java test2
[EMAIL PROTECTED]:~/java/listen$ reportbug -o blocking.bug `which java`
===
http://java.sun.com/j2se/1.4.2/docs/api/java/nio/channels/SelectableChannel.html
===
Blocking mode
A selectable channel is either in blocking mode or in non-blocking
mode. In blocking mode, every I/O operation invoked upon the channel
will block until it completes. In non-blocking mode an I/O operation
will never block and may transfer fewer bytes than were requested or
possibly no bytes at all. The blocking mode of a selectable channel may
be determined by invoking its isBlocking method.
Newly-created selectable channels are always in blocking
mode. Non-blocking mode is most useful in conjunction with selector-based
multiplexing. A channel must be placed into non-blocking mode before
being registered with a selector, and may not be returned to blocking
mode until it has been deregistered.
===
sample code:
===
import java.net.InetSocketAddress;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.spi.SelectorProvider;
public class test2 {
public static void main(String[] args) {
try {
Selector sel = null;
InetSocketAddress isa = new InetSocketAddress(2300);
ServerSocketChannel ssc = ServerSocketChannel.open();
ssc.configureBlocking(false);
ssc.socket().bind(isa);
sel = SelectorProvider.provider().openSelector();
ssc.register(sel, SelectionKey.OP_ACCEPT);
ssc.configureBlocking(true);
} catch(Exception e) {
e.printStackTrace();
}
}
}
===
-- System Information:
Debian Release: 4.0
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-blitz8
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Versions of packages gij-4.1 depends on:
ii gcj-4.1-base 4.1.1-20 The GNU Compiler Collection (gcj b
ii libc6 2.3.6.ds1-13 GNU C Library: Shared libraries
ii libgcc1 1:4.1.1-21 GCC support library
ii libgcj7-0 4.1.1-20 Java runtime library for use with
ii zlib1g 1:1.2.3-13 compression library - runtime
gij-4.1 recommends no packages.
-- debconf-show failed
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