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/*
* 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.embedded.jetty;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.jetty.http2.server.HTTP2CServerConnectionFactory;
import org.eclipse.jetty.server.AbstractConnector;
import org.eclipse.jetty.server.ConnectionFactory;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.HttpConfiguration;
import org.eclipse.jetty.server.HttpConnectionFactory;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.server.handler.HandlerWrapper;
import org.eclipse.jetty.server.handler.StatisticsHandler;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.util.thread.ThreadPool;
import org.springframework.boot.web.reactive.server.AbstractReactiveWebServerFactory;
import org.springframework.boot.web.reactive.server.ReactiveWebServerFactory;
import org.springframework.boot.web.server.Shutdown;
import org.springframework.boot.web.server.WebServer;
import org.springframework.http.client.reactive.JettyResourceFactory;
import org.springframework.http.server.reactive.HttpHandler;
import org.springframework.http.server.reactive.JettyHttpHandlerAdapter;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* {@link ReactiveWebServerFactory} that can be used to create {@link JettyWebServer}s.
*
* @author Brian Clozel
* @since 2.0.0
*/
public class JettyReactiveWebServerFactory extends AbstractReactiveWebServerFactory
implements ConfigurableJettyWebServerFactory {
private static final Log logger = LogFactory.getLog(JettyReactiveWebServerFactory.class);
/**
* The number of acceptor threads to use.
*/
private int acceptors = -1;
/**
* The number of selector threads to use.
*/
private int selectors = -1;
private boolean useForwardHeaders;
private Set jettyServerCustomizers = new LinkedHashSet<>();
private JettyResourceFactory resourceFactory;
private ThreadPool threadPool;
/**
* Create a new {@link JettyServletWebServerFactory} instance.
*/
public JettyReactiveWebServerFactory() {
}
/**
* Create a new {@link JettyServletWebServerFactory} that listens for requests using
* the specified port.
* @param port the port to listen on
*/
public JettyReactiveWebServerFactory(int port) {
super(port);
}
@Override
public void setUseForwardHeaders(boolean useForwardHeaders) {
this.useForwardHeaders = useForwardHeaders;
}
@Override
public void setAcceptors(int acceptors) {
this.acceptors = acceptors;
}
@Override
public WebServer getWebServer(HttpHandler httpHandler) {
JettyHttpHandlerAdapter servlet = new JettyHttpHandlerAdapter(httpHandler);
Server server = createJettyServer(servlet);
return new JettyWebServer(server, getPort() >= 0);
}
@Override
public void addServerCustomizers(JettyServerCustomizer... customizers) {
Assert.notNull(customizers, "Customizers must not be null");
this.jettyServerCustomizers.addAll(Arrays.asList(customizers));
}
/**
* Sets {@link JettyServerCustomizer}s that will be applied to the {@link Server}
* before it is started. Calling this method will replace any existing customizers.
* @param customizers the Jetty customizers to apply
*/
public void setServerCustomizers(Collection customizers) {
Assert.notNull(customizers, "Customizers must not be null");
this.jettyServerCustomizers = new LinkedHashSet<>(customizers);
}
/**
* Returns a mutable collection of Jetty {@link JettyServerCustomizer}s that will be
* applied to the {@link Server} before it is created.
* @return the Jetty customizers
*/
public Collection getServerCustomizers() {
return this.jettyServerCustomizers;
}
/**
* Returns a Jetty {@link ThreadPool} that should be used by the {@link Server}.
* @return a Jetty {@link ThreadPool} or {@code null}
*/
public ThreadPool getThreadPool() {
return this.threadPool;
}
@Override
public void setThreadPool(ThreadPool threadPool) {
this.threadPool = threadPool;
}
@Override
public void setSelectors(int selectors) {
this.selectors = selectors;
}
/**
* Set the {@link JettyResourceFactory} to get the shared resources from.
* @param resourceFactory the server resources
* @since 2.1.0
*/
public void setResourceFactory(JettyResourceFactory resourceFactory) {
this.resourceFactory = resourceFactory;
}
protected JettyResourceFactory getResourceFactory() {
return this.resourceFactory;
}
protected Server createJettyServer(JettyHttpHandlerAdapter servlet) {
int port = Math.max(getPort(), 0);
InetSocketAddress address = new InetSocketAddress(getAddress(), port);
Server server = new Server(getThreadPool());
server.addConnector(createConnector(address, server));
server.setStopTimeout(0);
ServletHolder servletHolder = new ServletHolder(servlet);
servletHolder.setAsyncSupported(true);
ServletContextHandler contextHandler = new ServletContextHandler(server, "/", false, false);
contextHandler.addServlet(servletHolder, "/");
server.setHandler(addHandlerWrappers(contextHandler));
JettyReactiveWebServerFactory.logger.info("Server initialized with port: " + port);
if (getSsl() != null && getSsl().isEnabled()) {
customizeSsl(server, address);
}
for (JettyServerCustomizer customizer : getServerCustomizers()) {
customizer.customize(server);
}
if (this.useForwardHeaders) {
new ForwardHeadersCustomizer().customize(server);
}
if (getShutdown() == Shutdown.GRACEFUL) {
StatisticsHandler statisticsHandler = new StatisticsHandler();
statisticsHandler.setHandler(server.getHandler());
server.setHandler(statisticsHandler);
}
return server;
}
private AbstractConnector createConnector(InetSocketAddress address, Server server) {
HttpConfiguration httpConfiguration = new HttpConfiguration();
httpConfiguration.setSendServerVersion(false);
List connectionFactories = new ArrayList<>();
connectionFactories.add(new HttpConnectionFactory(httpConfiguration));
if (getHttp2() != null && getHttp2().isEnabled()) {
connectionFactories.add(new HTTP2CServerConnectionFactory(httpConfiguration));
}
JettyResourceFactory resourceFactory = getResourceFactory();
ServerConnector connector;
if (resourceFactory != null) {
connector = new ServerConnector(server, resourceFactory.getExecutor(), resourceFactory.getScheduler(),
resourceFactory.getByteBufferPool(), this.acceptors, this.selectors,
connectionFactories.toArray(new ConnectionFactory[0]));
}
else {
connector = new ServerConnector(server, this.acceptors, this.selectors,
connectionFactories.toArray(new ConnectionFactory[0]));
}
connector.setHost(address.getHostString());
connector.setPort(address.getPort());
return connector;
}
private Handler addHandlerWrappers(Handler handler) {
if (getCompression() != null && getCompression().getEnabled()) {
handler = applyWrapper(handler, JettyHandlerWrappers.createGzipHandlerWrapper(getCompression()));
}
if (StringUtils.hasText(getServerHeader())) {
handler = applyWrapper(handler, JettyHandlerWrappers.createServerHeaderHandlerWrapper(getServerHeader()));
}
return handler;
}
private Handler applyWrapper(Handler handler, HandlerWrapper wrapper) {
wrapper.setHandler(handler);
return wrapper;
}
private void customizeSsl(Server server, InetSocketAddress address) {
new SslServerCustomizer(address, getSsl(), getOrCreateSslStoreProvider(), getHttp2()).customize(server);
}
}