org.springframework.boot.devtools.restart.AgentReloader Maven / Gradle / Ivy
/*
* Copyright 2012-2021 the original author or authors.
*
* 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
*
* https://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.springframework.boot.devtools.restart;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;
import org.springframework.util.ClassUtils;
/**
* Utility to determine if a Java agent based reloader (e.g. JRebel) is being used.
*
* @author Phillip Webb
* @since 1.3.0
*/
public abstract class AgentReloader {
private static final Set AGENT_CLASSES;
static {
Set agentClasses = new LinkedHashSet<>();
agentClasses.add("org.zeroturnaround.javarebel.Integration");
agentClasses.add("org.zeroturnaround.javarebel.ReloaderFactory");
agentClasses.add("org.hotswap.agent.HotswapAgent");
AGENT_CLASSES = Collections.unmodifiableSet(agentClasses);
}
private AgentReloader() {
}
/**
* Determine if any agent reloader is active.
* @return true if agent reloading is active
*/
public static boolean isActive() {
return isActive(null) || isActive(AgentReloader.class.getClassLoader())
|| isActive(ClassLoader.getSystemClassLoader());
}
private static boolean isActive(ClassLoader classLoader) {
for (String agentClass : AGENT_CLASSES) {
if (ClassUtils.isPresent(agentClass, classLoader)) {
return true;
}
}
return false;
}
}