/*
* Copyright ( c ) 2003 , 2016 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
import javax.sound.midi.MidiDevice;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.Sequencer;
import javax.sound.midi.Synthesizer;
/**
* @ test
* @ key sound
* @ bug 4914667
* @ summary Closing and reopening MIDI IN device on Linux throws
* MidiUnavailableException
*/
public class Reopen {
private static boolean isTestExecuted;
private static boolean isTestPassed;
/*
* run manually :
* java Reopen 100 in for 100 iterations on the MIDI IN device
* java Reopen 16 out for 16 iterations on the MIDI OUT device
*/
public static void main(String[] args) throws Exception {
if (args.length == 0 ) {
doAllTests();
} else if (args.length == 2 ) {
int numIterations = Integer.parseInt(args[0 ]);
if (args[1 ].equals("in" )) {
doTest(numIterations, true );
} else {
doTest(numIterations, false );
}
} else {
out("usage: java Reopen <iterations> in|out" );
}
}
private static void doAllTests() throws Exception {
out("#4914667: Closing and reopening MIDI IN device on Linux throws MidiUnavailableException" );
boolean success = true ;
try {
success &= doTest(20 , true ); // MIDI IN
success &= doTest(20 , false ); // MIDI OUT
isTestExecuted = true ;
} catch (Exception e) {
out(e);
isTestExecuted = false ;
}
isTestPassed = success;
if (isTestExecuted) {
if (isTestPassed) {
out("Test PASSED." );
} else {
throw new Exception("Test FAILED." );
}
} else {
out("Test NOT FAILED" );
}
}
private static boolean doTest(int numIterations, boolean input) throws Exception {
MidiDevice.Info[] infos = MidiSystem.getMidiDeviceInfo();
MidiDevice outDevice = null ;
MidiDevice inDevice = null ;
for (int i = 0 ; i < infos.length; i++) {
MidiDevice device = MidiSystem.getMidiDevice(infos[i]);
if (! (device instanceof Sequencer) &&
! (device instanceof Synthesizer)) {
if (device.getMaxReceivers() != 0 ) {
outDevice = device;
}
if (device.getMaxTransmitters() != 0 ) {
inDevice = device;
}
}
}
MidiDevice testDevice = null ;
if (input) {
testDevice = inDevice;
} else {
testDevice = outDevice;
}
if (testDevice == null ) {
out("Cannot test: device not available." );
return true ;
}
out("Using Device: " + testDevice);
for (int i = 0 ; i < numIterations; i++) {
out("@@@ ITERATION: " + i);
testDevice.open();
// This sleep ensures that the thread of MidiInDevice is started.
sleep(50 );
testDevice.close();
}
return true ;
}
private static void sleep(int milliseconds) {
try {
Thread .sleep(milliseconds);
} catch (InterruptedException e) {
}
}
private static void out(Throwable t) {
t.printStackTrace(System.out);
}
private static void out(String message) {
System.out.println(message);
}
}
Messung V0.5 in Prozent C=93 H=90 G=91
¤ Dauer der Verarbeitung: 0.18 Sekunden
(vorverarbeitet am 2026-06-10)
¤
*© Formatika GbR, Deutschland