org.springframework.boot.reactor.ReactorEnvironmentPostProcessor Maven / Gradle / Ivy
/*
* Copyright 2012-2023 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.reactor;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.env.EnvironmentPostProcessor;
import org.springframework.boot.system.JavaVersion;
import org.springframework.core.Ordered;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.util.ClassUtils;
/**
* {@link EnvironmentPostProcessor} to enable the Reactor global features as early as
* possible in the startup process.
*
* If the "reactor-tools" dependency is available, the debug agent is enabled by default,
* unless the {@code "spring.reactor.debug-agent.enabled"} configuration property is set
* to false.
*
* If the {@code "spring.threads.virtual.enabled"} property is enabled and the current JVM
* is 21 or later, then the Reactor System property is set to configure the Bounded
* Elastic Scheduler to use Virtual Threads globally.
*
* @author Brian Clozel
* @since 3.2.0
*/
public class ReactorEnvironmentPostProcessor implements EnvironmentPostProcessor, Ordered {
private static final String REACTOR_DEBUGAGENT_CLASS = "reactor.tools.agent.ReactorDebugAgent";
@Override
public void postProcessEnvironment(ConfigurableEnvironment environment, SpringApplication application) {
if (ClassUtils.isPresent(REACTOR_DEBUGAGENT_CLASS, null)) {
Boolean agentEnabled = environment.getProperty("spring.reactor.debug-agent.enabled", Boolean.class);
if (agentEnabled != Boolean.FALSE) {
try {
Class debugAgent = Class.forName(REACTOR_DEBUGAGENT_CLASS);
debugAgent.getMethod("init").invoke(null);
}
catch (Exception ex) {
throw new RuntimeException("Failed to init Reactor's debug agent", ex);
}
}
}
if (environment.getProperty("spring.threads.virtual.enabled", boolean.class, false)
&& JavaVersion.getJavaVersion().isEqualOrNewerThan(JavaVersion.TWENTY_ONE)) {
System.setProperty("reactor.schedulers.defaultBoundedElasticOnVirtualThreads", "true");
}
}
@Override
public int getOrder() {
return Ordered.LOWEST_PRECEDENCE;
}
}