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pull/14460/merge
Phillip Webb 6 years ago
parent cdc6cfcaa8
commit 456d1af443
3 changed files with 65 additions and 57 deletions
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6
spring-boot-project/spring-boot-starters/pom.xml
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@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
@ -145,6 +146,9 @@
<ignoredResourcePatterns>
<ignoredResourcePattern>changelog.txt</ignoredResourcePattern>
</ignoredResourcePatterns>
<ignoredClassPatterns>
<ignoredClassPattern>module-info</ignoredClassPattern>
</ignoredClassPatterns>
</configuration>
</execution>
</executions>

63
spring-boot-project/spring-boot/src/main/java/org/springframework/boot/SpringApplication.java
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@ -164,12 +164,9 @@ public class SpringApplication {
* The class name of application context that will be used by default for web
* environments.
*/
public static final String DEFAULT_WEB_CONTEXT_CLASS = "org.springframework.boot."
public static final String DEFAULT_SERVLET_WEB_CONTEXT_CLASS = "org.springframework.boot."
+ "web.servlet.context.AnnotationConfigServletWebServerApplicationContext";
private static final String[] WEB_ENVIRONMENT_CLASSES = { "javax.servlet.Servlet",
"org.springframework.web.context.ConfigurableWebApplicationContext" };
/**
* The class name of application context that will be used by default for reactive web
* environments.
@ -177,14 +174,6 @@ public class SpringApplication {
public static final String DEFAULT_REACTIVE_WEB_CONTEXT_CLASS = "org.springframework."
+ "boot.web.reactive.context.AnnotationConfigReactiveWebServerApplicationContext";
private static final String REACTIVE_WEB_ENVIRONMENT_CLASS = "org.springframework."
+ "web.reactive.DispatcherHandler";
private static final String MVC_WEB_ENVIRONMENT_CLASS = "org.springframework."
+ "web.servlet.DispatcherServlet";
private static final String JERSEY_WEB_ENVIRONMENT_CLASS = "org.glassfish.jersey.server.ResourceConfig";
/**
* Default banner location.
*/
@ -266,27 +255,13 @@ public class SpringApplication {
this.resourceLoader = resourceLoader;
Assert.notNull(primarySources, "PrimarySources must not be null");
this.primarySources = new LinkedHashSet<>(Arrays.asList(primarySources));
this.webApplicationType = deduceWebApplicationType();
this.webApplicationType = WebApplicationType.deduceFromClasspath();
setInitializers((Collection) getSpringFactoriesInstances(
ApplicationContextInitializer.class));
setListeners((Collection) getSpringFactoriesInstances(ApplicationListener.class));
this.mainApplicationClass = deduceMainApplicationClass();
}
private WebApplicationType deduceWebApplicationType() {
if (ClassUtils.isPresent(REACTIVE_WEB_ENVIRONMENT_CLASS, null)
&& !ClassUtils.isPresent(MVC_WEB_ENVIRONMENT_CLASS, null)
&& !ClassUtils.isPresent(JERSEY_WEB_ENVIRONMENT_CLASS, null)) {
return WebApplicationType.REACTIVE;
}
for (String className : WEB_ENVIRONMENT_CLASSES) {
if (!ClassUtils.isPresent(className, null)) {
return WebApplicationType.NONE;
}
}
return WebApplicationType.SERVLET;
}
private Class<?> deduceMainApplicationClass() {
try {
StackTraceElement[] stackTrace = new RuntimeException().getStackTrace();
@ -596,7 +571,7 @@ public class SpringApplication {
try {
switch (this.webApplicationType) {
case SERVLET:
contextClass = Class.forName(DEFAULT_WEB_CONTEXT_CLASS);
contextClass = Class.forName(DEFAULT_SERVLET_WEB_CONTEXT_CLASS);
break;
case REACTIVE:
contextClass = Class.forName(DEFAULT_REACTIVE_WEB_CONTEXT_CLASS);
@ -1173,38 +1148,16 @@ public class SpringApplication {
/**
* Sets the type of Spring {@link ApplicationContext} that will be created. If not
* specified defaults to {@link #DEFAULT_WEB_CONTEXT_CLASS} for web based applications
* or {@link AnnotationConfigApplicationContext} for non web based applications.
* specified defaults to {@link #DEFAULT_SERVLET_WEB_CONTEXT_CLASS} for web based
* applications or {@link AnnotationConfigApplicationContext} for non web based
* applications.
* @param applicationContextClass the context class to set
*/
public void setApplicationContextClass(
Class<? extends ConfigurableApplicationContext> applicationContextClass) {
this.applicationContextClass = applicationContextClass;
this.webApplicationType = deduceWebApplicationType(applicationContextClass);
}
private WebApplicationType deduceWebApplicationType(
Class<?> applicationContextClass) {
if (safeIsAssignableFrom("org.springframework.web.context.WebApplicationContext",
applicationContextClass)) {
return WebApplicationType.SERVLET;
}
if (safeIsAssignableFrom(
"org.springframework.boot.web.reactive.context.ReactiveWebApplicationContext",
applicationContextClass)) {
return WebApplicationType.REACTIVE;
}
return WebApplicationType.NONE;
}
private boolean safeIsAssignableFrom(String target, Class<?> type) {
try {
Class<?> targetClass = ClassUtils.forName(target, getClassLoader());
return targetClass.isAssignableFrom(type);
}
catch (Throwable ex) {
return false;
}
this.webApplicationType = WebApplicationType
.deduceFromApplicationContext(applicationContextClass);
}
/**

53
spring-boot-project/spring-boot/src/main/java/org/springframework/boot/WebApplicationType.java
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@ -16,6 +16,8 @@
package org.springframework.boot;
import org.springframework.util.ClassUtils;
/**
* An enumeration of possible types of web application.
*
@ -41,6 +43,55 @@ public enum WebApplicationType {
* The application should run as a reactive web application and should start an
* embedded reactive web server.
*/
REACTIVE
REACTIVE;
private static final String[] SERVLET_INDICATOR_CLASSES = { "javax.servlet.Servlet",
"org.springframework.web.context.ConfigurableWebApplicationContext" };
private static final String WEBMVC_INDICATOR_CLASS = "org.springframework."
+ "web.servlet.DispatcherServlet";
private static final String WEBFLUX_INDICATOR_CLASS = "org."
+ "springframework.web.reactive.DispatcherHandler";
private static final String JERSEY_INDICATOR_CLASS = "org.glassfish.jersey.server.ResourceConfig";
private static final String SERVLET_APPLICATION_CONTEXT_CLASS = "org.springframework.web.context.WebApplicationContext";
private static final String REACTIVE_APPLICATION_CONTEXT_CLASS = "org.springframework.boot.web.reactive.context.ReactiveWebApplicationContext";
static WebApplicationType deduceFromClasspath() {
if (ClassUtils.isPresent(WEBFLUX_INDICATOR_CLASS, null)
&& !ClassUtils.isPresent(WEBMVC_INDICATOR_CLASS, null)
&& !ClassUtils.isPresent(JERSEY_INDICATOR_CLASS, null)) {
return WebApplicationType.REACTIVE;
}
for (String className : SERVLET_INDICATOR_CLASSES) {
if (!ClassUtils.isPresent(className, null)) {
return WebApplicationType.NONE;
}
}
return WebApplicationType.SERVLET;
}
static WebApplicationType deduceFromApplicationContext(
Class<?> applicationContextClass) {
if (isAssignable(SERVLET_APPLICATION_CONTEXT_CLASS, applicationContextClass)) {
return WebApplicationType.SERVLET;
}
if (isAssignable(REACTIVE_APPLICATION_CONTEXT_CLASS, applicationContextClass)) {
return WebApplicationType.REACTIVE;
}
return WebApplicationType.NONE;
}
private static boolean isAssignable(String target, Class<?> type) {
try {
return ClassUtils.resolveClassName(target, null).isAssignableFrom(type);
}
catch (Throwable ex) {
return false;
}
}
}

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