e0d67ae703
Unlike Java 8, 9, and 10, Java 11 does not tolerate a null URL being used to create a URLClassLoader. The Atmosphere sample looks for a resource named /WEB-INF/classes which only exists in a packaged war application. In all other cases the resulting URL is null. Atmosphere uses this to create a URLClassLoader which fails on Java 11. This commit updates the sample to customize the handlers path. There are other web application-specific assumptions in Atmosphere, such as the scanning of WEB-INF/lib by default. This change appears to get the sample going, but we should, perhaps, consider removing it in the longer term, particularly as Boot itself has no Atmosphere integration. See gh-14028
89 lines
3.1 KiB
Java
89 lines
3.1 KiB
Java
/*
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* Copyright 2012-2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.atmosphere;
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import java.util.Collections;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import org.atmosphere.cpr.AtmosphereServlet;
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import org.atmosphere.cpr.ContainerInitializer;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.SpringBootConfiguration;
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import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
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import org.springframework.boot.web.servlet.ServletContextInitializer;
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import org.springframework.boot.web.servlet.ServletRegistrationBean;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.core.Ordered;
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import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
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import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
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@SpringBootConfiguration
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@EnableAutoConfiguration
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public class SampleAtmosphereApplication {
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@Bean
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public EmbeddedAtmosphereInitializer atmosphereInitializer() {
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return new EmbeddedAtmosphereInitializer();
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}
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@Bean
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public ServletRegistrationBean<AtmosphereServlet> atmosphereServlet() {
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// Dispatcher servlet is mapped to '/home' to allow the AtmosphereServlet
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// to be mapped to '/chat'
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AtmosphereServlet atmosphereServlet = new AtmosphereServlet();
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atmosphereServlet.framework().setHandlersPath("/");
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ServletRegistrationBean<AtmosphereServlet> registration = new ServletRegistrationBean<>(
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atmosphereServlet, "/chat/*");
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registration.addInitParameter("org.atmosphere.cpr.packages", "sample");
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registration.addInitParameter("org.atmosphere.interceptor.HeartbeatInterceptor"
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+ ".clientHeartbeatFrequencyInSeconds", "10");
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registration.setLoadOnStartup(0);
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// Need to occur before the EmbeddedAtmosphereInitializer
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registration.setOrder(Ordered.HIGHEST_PRECEDENCE);
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return registration;
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}
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public static void main(String[] args) throws Exception {
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SpringApplication.run(SampleAtmosphereApplication.class, args);
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}
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@Configuration
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static class MvcConfiguration implements WebMvcConfigurer {
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@Override
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public void addViewControllers(ViewControllerRegistry registry) {
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registry.addViewController("/").setViewName("forward:/home/home.html");
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}
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}
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private static class EmbeddedAtmosphereInitializer extends ContainerInitializer
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implements ServletContextInitializer {
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@Override
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public void onStartup(ServletContext servletContext) throws ServletException {
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onStartup(Collections.emptySet(), servletContext);
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}
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}
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}
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