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Improve ApplicationContextInitializer sorting 

ContextLoader and FrameworkServlet now use
AnnotationAwareOrderComparator to support @Order usage; previously
supported only implementation of the Ordered interface.

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@4381 50f2f4bb-b051-0410-bef5-90022cba6387
This commit is contained in:
Chris Beams 2011-05-30 12:55:33 +00:00
parent bd541aca94
commit c7a7618400
3 changed files with 18 additions and 13 deletions
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8
org.springframework.context/src/main/java/org/springframework/context/ApplicationContextInitializer.java
View File

@ -27,16 +27,16 @@ package org.springframework.context;
* for declaring a "contextInitializerClasses" context-param and init-param, respectively.
*
* <p>{@code ApplicationContextInitializer} processors are encouraged to detect
* whether Spring's {@link org.springframework.core.Ordered Ordered} or
* {@link org.springframework.core.PriorityOrdered PriorityOrdered} interfaces are also
* implemented and sort instances accordingly if so prior to invocation.
* whether Spring's {@link org.springframework.core.Ordered Ordered} interface has been
* implemented or if the @{@link org.springframework.core.annotation.Order Order}
* annotation is present and to sort instances accordingly if so prior to invocation.
*
* @author Chris Beams
* @since 3.1
* @see org.springframework.web.context.ContextLoader#customizeContext
* @see org.springframework.web.context.ContextLoader#CONTEXT_INITIALIZER_CLASSES_PARAM
* @see org.springframework.web.servlet.FrameworkServlet#setContextInitializerClasses
* @see org.springframework.web.servlet.FrameworkServlet#initializeWebApplicationContext
* @see org.springframework.web.servlet.FrameworkServlet#applyInitializers
*/
public interface ApplicationContextInitializer<C extends ConfigurableApplicationContext> {

9
org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/FrameworkServlet.java
View File

@ -18,7 +18,8 @@ package org.springframework.web.servlet;
import java.io.IOException;
import java.security.Principal;
import java.util.TreeSet;
import java.util.ArrayList;
import java.util.Collections;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
@ -184,8 +185,8 @@ public abstract class FrameworkServlet extends HttpServletBean {
private String contextInitializerClasses;
/** Actual ApplicationContextInitializer instances to apply to the context */
private TreeSet<ApplicationContextInitializer<ConfigurableApplicationContext>> contextInitializers =
new TreeSet<ApplicationContextInitializer<ConfigurableApplicationContext>>(new AnnotationAwareOrderComparator());
private ArrayList<ApplicationContextInitializer<ConfigurableApplicationContext>> contextInitializers =
new ArrayList<ApplicationContextInitializer<ConfigurableApplicationContext>>();
/**
@ -652,6 +653,8 @@ public abstract class FrameworkServlet extends HttpServletBean {
}
}
Collections.sort(this.contextInitializers, new AnnotationAwareOrderComparator());
for (ApplicationContextInitializer<ConfigurableApplicationContext> initializer : this.contextInitializers) {
initializer.initialize(wac);
}

14
org.springframework.web/src/main/java/org/springframework/web/context/ContextLoader.java
View File

@ -18,6 +18,7 @@ package org.springframework.web.context;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Properties;
@ -36,8 +37,8 @@ import org.springframework.context.ApplicationContextInitializer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.access.ContextSingletonBeanFactoryLocator;
import org.springframework.core.GenericTypeResolver;
import org.springframework.core.OrderComparator;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.AnnotationAwareOrderComparator;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.support.PropertiesLoaderUtils;
import org.springframework.util.Assert;
@ -348,7 +349,7 @@ public class ContextLoader {
}
catch (ClassNotFoundException ex) {
throw new ApplicationContextException(
"Failed to load context configurer class [" + className + "]", ex);
"Failed to load context initializer class [" + className + "]", ex);
}
}
}
@ -364,8 +365,9 @@ public class ContextLoader {
* {@linkplain #CONTEXT_INITIALIZER_CLASSES_PARAM context init parameters} and
* {@linkplain ApplicationContextInitializer#initialize invokes each} with the
* given web application context.
* <p>Any {@link Ordered} {@code ApplicationContextInitializer} will be sorted
* appropriately.
* <p>Any {@code ApplicationContextInitializers} implementing
* {@link org.springframework.core.Ordered Ordered} or marked with @{@link
* org.springframework.core.annotation.Order Order} will be sorted appropriately.
* @param servletContext the current servlet context
* @param applicationContext the newly created application context
* @see #createWebApplicationContext(ServletContext, ApplicationContext)
@ -373,7 +375,7 @@ public class ContextLoader {
* @see ApplicationContextInitializer#initialize(ConfigurableApplicationContext)
*/
protected void customizeContext(ServletContext servletContext, ConfigurableWebApplicationContext applicationContext) {
List<ApplicationContextInitializer<ConfigurableApplicationContext>> initializerInstances =
ArrayList<ApplicationContextInitializer<ConfigurableApplicationContext>> initializerInstances =
new ArrayList<ApplicationContextInitializer<ConfigurableApplicationContext>>();
for (Class<ApplicationContextInitializer<ConfigurableApplicationContext>> initializerClass :
@ -388,7 +390,7 @@ public class ContextLoader {
initializerInstances.add(BeanUtils.instantiateClass(initializerClass));
}
OrderComparator.sort(initializerInstances);
Collections.sort(initializerInstances, new AnnotationAwareOrderComparator());
for (ApplicationContextInitializer<ConfigurableApplicationContext> initializer : initializerInstances) {
initializer.initialize(applicationContext);