org.apache.catalina.tribes.util.JreCompat 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;
/**
* This is the base implementation class for JRE compatibility and provides an implementation based on Java 11.
* Sub-classes may extend this class and provide alternative implementations for later JRE versions
*/
public class JreCompat {
private static final JreCompat instance;
static {
// This is Tomcat 11.0.x with a minimum Java version of Java 11.
// Look for the highest supported JVM first
if (Jre14Compat.isSupported()) {
instance = new Jre14Compat();
} else {
instance = new JreCompat();
}
}
public static JreCompat getInstance() {
return instance;
}
// Java 11 implementations of Java 14 methods
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));
}
}