org.springframework.boot.web.context.WebServerGracefulShutdownLifecycle Maven / Gradle / Ivy
/*
* Copyright 2012-2022 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.web.context;
import org.springframework.boot.web.server.WebServer;
import org.springframework.context.SmartLifecycle;
/**
* {@link SmartLifecycle} to trigger {@link WebServer} graceful shutdown.
*
* @author Andy Wilkinson
* @since 2.5.0
*/
public final class WebServerGracefulShutdownLifecycle implements SmartLifecycle {
/**
* {@link SmartLifecycle#getPhase() SmartLifecycle phase} in which graceful shutdown
* of the web server is performed.
*/
public static final int SMART_LIFECYCLE_PHASE = SmartLifecycle.DEFAULT_PHASE - 1024;
private final WebServer webServer;
private volatile boolean running;
/**
* Creates a new {@code WebServerGracefulShutdownLifecycle} that will gracefully shut
* down the given {@code webServer}.
* @param webServer web server to shut down gracefully
*/
public WebServerGracefulShutdownLifecycle(WebServer webServer) {
this.webServer = webServer;
}
@Override
public void start() {
this.running = true;
}
@Override
public void stop() {
throw new UnsupportedOperationException("Stop must not be invoked directly");
}
@Override
public void stop(Runnable callback) {
this.running = false;
this.webServer.shutDownGracefully((result) -> callback.run());
}
@Override
public boolean isRunning() {
return this.running;
}
@Override
public int getPhase() {
return SMART_LIFECYCLE_PHASE;
}
}