org.apache.tomcat.util.compat.Jre21Compat Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.tomcat.util.compat;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.res.StringManager;
public class Jre21Compat extends Jre19Compat {
private static final Log log = LogFactory.getLog(Jre21Compat.class);
private static final StringManager sm = StringManager.getManager(Jre21Compat.class);
private static final Method nameMethod;
private static final Method startMethod;
private static final Method ofVirtualMethod;
static {
Class> c1 = null;
Method m1 = null;
Method m2 = null;
Method m3 = null;
try {
c1 = Class.forName("java.lang.Thread$Builder");
m1 = c1.getMethod("name", String.class, long.class);
m2 = c1.getMethod("start", Runnable.class);
m3 = Thread.class.getMethod("ofVirtual", (Class>[]) null);
} catch (ClassNotFoundException e) {
// Must be pre-Java 21
log.debug(sm.getString("jre21Compat.javaPre21"), e);
} catch (ReflectiveOperationException e) {
// Should never happen
log.error(sm.getString("jre21Compat.unexpected"), e);
}
nameMethod = m1;
startMethod = m2;
ofVirtualMethod = m3;
}
static boolean isSupported() {
return ofVirtualMethod != null;
}
@Override
public Object createVirtualThreadBuilder(String name) {
try {
Object threadBuilder = ofVirtualMethod.invoke(null, (Object[]) null);
nameMethod.invoke(threadBuilder, name, Long.valueOf(0));
return threadBuilder;
} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
throw new UnsupportedOperationException(e);
}
}
@Override
public void threadBuilderStart(Object threadBuilder, Runnable command) {
try {
startMethod.invoke(threadBuilder, command);
} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
throw new UnsupportedOperationException(e);
}
}
}
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