com.aspectran.core.util.Win32ConsoleCtrlCloseHook Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2022 The Aspectran Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.aspectran.core.util;
import com.aspectran.core.util.logging.Logger;
import com.aspectran.core.util.logging.LoggerFactory;
import com.sun.jna.Native;
import com.sun.jna.win32.StdCallLibrary;
public class Win32ConsoleCtrlCloseHook implements StdCallLibrary.StdCallCallback {
private static final Logger logger = LoggerFactory.getLogger(Win32ConsoleCtrlCloseHook.class);
private static final boolean IS_WIN = System.getProperty("os.name").toLowerCase().contains("win");
private static final int CTRL_CLOSE_EVENT = 2;
private final Thread hook;
private Win32ConsoleCtrlCloseHook(Thread hook) {
this.hook = hook;
}
public boolean callback(long dwCtrlType) {
if ((int)dwCtrlType == CTRL_CLOSE_EVENT) {
if (logger.isDebugEnabled()) {
logger.debug("Win32ConsoleCtrlHandler receives event " + dwCtrlType);
}
hook.start();
while (true) {
try {
hook.join();
break;
} catch (InterruptedException ignored) {
}
}
return true;
}
return false;
}
private Win32ConsoleCtrlCloseHook register() {
SetConsoleCtrlHandler(this, true);
return this;
}
public void release() {
SetConsoleCtrlHandler(this, false);
}
private native boolean SetConsoleCtrlHandler(StdCallLibrary.StdCallCallback handler, boolean add);
public static Win32ConsoleCtrlCloseHook register(Thread hook) {
if (!IS_WIN) {
return null;
}
try {
Native.register("kernel32");
if (logger.isDebugEnabled()) {
logger.debug("Windows/Kernel32 library loaded");
}
Win32ConsoleCtrlCloseHook win32ConsoleCtrlCloseHook = new Win32ConsoleCtrlCloseHook(hook);
return win32ConsoleCtrlCloseHook.register();
} catch (NoClassDefFoundError e) {
logger.warn("JNA not found. Native methods and handlers will be disabled.");
} catch (UnsatisfiedLinkError e) {
logger.warn("Unable to link Windows/Kernel32 library. Native methods and handlers will be disabled.");
}
return null;
}
}