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Execute HandlerInterceptors in registration order

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Prior to this commit, registering `HandlerInterceptor`s using the
`InterceptorRegistry` would not guarantee their order of execution. In
fact, `HandlerInterceptor`s would always be executed before
`MappedInterceptor`s.

This change makes `MappedInterceptor` implement the `HandlerInterceptor`
interface, in order to register all interceptors in a single ordered
list. The order of execution of interceptors is now guaranteed in the
`HandlerExecutionChain` built by `AbstractHandlerMapping`.

Issue: SPR-12673
This commit is contained in:
Brian Clozel
2015-05-19 12:21:35 +02:00
parent cf391f5ce1
commit c36435c042
4 changed files with 190 additions and 28 deletions
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55
spring-webmvc/src/main/java/org/springframework/web/servlet/handler/AbstractHandlerMapping.java
View File

@@ -19,7 +19,6 @@ package org.springframework.web.servlet.handler;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
@@ -78,9 +77,9 @@ public abstract class AbstractHandlerMapping extends WebApplicationObjectSupport
private final List<Object> interceptors = new ArrayList<Object>();
private final List<HandlerInterceptor> adaptedInterceptors = new ArrayList<HandlerInterceptor>();
private final List<HandlerInterceptor> handlerInterceptors = new ArrayList<HandlerInterceptor>();
private final List<MappedInterceptor> mappedInterceptors = new ArrayList<MappedInterceptor>();
private final List<MappedInterceptor> detectedMappedInterceptors = new ArrayList<MappedInterceptor>();
private CorsProcessor corsProcessor = new DefaultCorsProcessor();
@@ -246,7 +245,7 @@ public abstract class AbstractHandlerMapping extends WebApplicationObjectSupport
@Override
protected void initApplicationContext() throws BeansException {
extendInterceptors(this.interceptors);
detectMappedInterceptors(this.mappedInterceptors);
detectMappedInterceptors(this.detectedMappedInterceptors);
initInterceptors();
}
@@ -288,14 +287,11 @@ public abstract class AbstractHandlerMapping extends WebApplicationObjectSupport
if (interceptor == null) {
throw new IllegalArgumentException("Entry number " + i + " in interceptors array is null");
}
if (interceptor instanceof MappedInterceptor) {
this.mappedInterceptors.add((MappedInterceptor) interceptor);
}
else {
this.adaptedInterceptors.add(adaptInterceptor(interceptor));
}
this.handlerInterceptors.add(adaptInterceptor(interceptor));
}
}
this.handlerInterceptors.addAll(this.detectedMappedInterceptors);
this.interceptors.clear();
}
/**
@@ -327,8 +323,14 @@ public abstract class AbstractHandlerMapping extends WebApplicationObjectSupport
* @return the array of {@link HandlerInterceptor}s, or {@code null} if none
*/
protected final HandlerInterceptor[] getAdaptedInterceptors() {
int count = this.adaptedInterceptors.size();
return (count > 0 ? this.adaptedInterceptors.toArray(new HandlerInterceptor[count]) : null);
List<HandlerInterceptor> adaptedInterceptors = new ArrayList<HandlerInterceptor>();
for (HandlerInterceptor interceptor : this.handlerInterceptors) {
if (!(interceptor instanceof MappedInterceptor)) {
adaptedInterceptors.add(interceptor);
}
}
int count = adaptedInterceptors.size();
return (count > 0 ? adaptedInterceptors.toArray(new HandlerInterceptor[count]) : null);
}
/**
@@ -336,8 +338,14 @@ public abstract class AbstractHandlerMapping extends WebApplicationObjectSupport
* @return the array of {@link MappedInterceptor}s, or {@code null} if none
*/
protected final MappedInterceptor[] getMappedInterceptors() {
int count = this.mappedInterceptors.size();
return (count > 0 ? this.mappedInterceptors.toArray(new MappedInterceptor[count]) : null);
List<MappedInterceptor> mappedInterceptors = new ArrayList<MappedInterceptor>();
for (HandlerInterceptor interceptor : this.handlerInterceptors) {
if (interceptor instanceof MappedInterceptor) {
mappedInterceptors.add((MappedInterceptor) interceptor);
}
}
int count = mappedInterceptors.size();
return (count > 0 ? mappedInterceptors.toArray(new MappedInterceptor[count]) : null);
}
/**
@@ -397,8 +405,9 @@ public abstract class AbstractHandlerMapping extends WebApplicationObjectSupport
* applicable interceptors.
* <p>The default implementation builds a standard {@link HandlerExecutionChain}
* with the given handler, the handler mapping's common interceptors, and any
* {@link MappedInterceptor}s matching to the current request URL. Subclasses
* may override this in order to extend/rearrange the list of interceptors.
* {@link MappedInterceptor}s matching to the current request URL. Interceptors
* are added in the order they were registered. Subclasses may override this
* in order to extend/rearrange the list of interceptors.
* <p><b>NOTE:</b> The passed-in handler object may be a raw handler or a
* pre-built {@link HandlerExecutionChain}. This method should handle those
* two cases explicitly, either building a new {@link HandlerExecutionChain}
@@ -414,15 +423,19 @@ public abstract class AbstractHandlerMapping extends WebApplicationObjectSupport
protected HandlerExecutionChain getHandlerExecutionChain(Object handler, HttpServletRequest request) {
HandlerExecutionChain chain = (handler instanceof HandlerExecutionChain ?
(HandlerExecutionChain) handler : new HandlerExecutionChain(handler));
chain.addInterceptors(getAdaptedInterceptors());
String lookupPath = this.urlPathHelper.getLookupPathForRequest(request);
for (MappedInterceptor mappedInterceptor : this.mappedInterceptors) {
if (mappedInterceptor.matches(lookupPath, this.pathMatcher)) {
chain.addInterceptor(mappedInterceptor.getInterceptor());
for (HandlerInterceptor interceptor : this.handlerInterceptors) {
if (interceptor instanceof MappedInterceptor) {
MappedInterceptor mappedInterceptor = (MappedInterceptor) interceptor;
if (mappedInterceptor.matches(lookupPath, this.pathMatcher)) {
chain.addInterceptor(mappedInterceptor.getInterceptor());
}
}
else {
chain.addInterceptor(interceptor);
}
}
return chain;
}

30
spring-webmvc/src/main/java/org/springframework/web/servlet/handler/MappedInterceptor.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2002-2012 the original author or authors.
* Copyright 2002-2015 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.
@@ -16,14 +16,18 @@
package org.springframework.web.servlet.handler;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.util.PathMatcher;
import org.springframework.web.context.request.WebRequestInterceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
/**
* Contains a {@link HandlerInterceptor} along with include (and optionally
* exclude) path patterns to which the interceptor should apply. Also provides
* matching logic to test if the interceptor applies to a given request path.
* Contains and delegates calls to a {@link HandlerInterceptor} along with
* include (and optionally exclude) path patterns to which the interceptor should apply.
* Also provides matching logic to test if the interceptor applies to a given request path.
*
* <p>A MappedInterceptor can be registered directly with any
* {@link org.springframework.web.servlet.handler.AbstractHandlerMethodMapping
@@ -34,9 +38,10 @@ import org.springframework.web.servlet.HandlerInterceptor;
*
* @author Keith Donald
* @author Rossen Stoyanchev
* @author Brian Clozel
* @since 3.0
*/
public final class MappedInterceptor {
public final class MappedInterceptor implements HandlerInterceptor {
private final String[] includePatterns;
@@ -122,6 +127,21 @@ public final class MappedInterceptor {
return this.interceptor;
}
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
return this.interceptor.preHandle(request, response, handler);
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
this.interceptor.postHandle(request, response, handler, modelAndView);
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
this.interceptor.afterCompletion(request, response, handler, ex);
}
/**
* Returns {@code true} if the interceptor applies to the given request path.
* @param lookupPath the current request path