org.apache.catalina.tribes.util.Jre14Compat Maven / Gradle / Ivy
/*
* 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.catalina.tribes.util;
import java.io.IOException;
import java.net.MulticastSocket;
import java.net.StandardSocketOptions;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
public class Jre14Compat extends JreCompat {
private static final Log log = LogFactory.getLog(Jre14Compat.class);
private static final StringManager sm = StringManager.getManager(Jre14Compat.class);
private static final boolean supported;
static {
// Don't need any Java 19 specific classes (yet) so just test for one of
// the new ones for now.
Class c1 = null;
try {
c1 = Class.forName("java.io.Serial");
} catch (ClassNotFoundException cnfe) {
// Must be pre-Java 16
log.debug(sm.getString("jre14Compat.javaPre14"), cnfe);
}
supported = (c1 != null);
}
static boolean isSupported() {
return supported;
}
@Override
public void setSocketoptionIpMulticastLoop(MulticastSocket socket, boolean enabled) throws IOException {
/*
* Java < 14, a value of true means loopback is disabled. Java 14+ a value of true means loopback is enabled.
*/
socket.setOption(StandardSocketOptions.IP_MULTICAST_LOOP, Boolean.valueOf(enabled));
}
}