Propagate exceptions in security matchers

Update `ApplicationContextRequestMatcher` and
`ApplicationContextServerWebExchangeMatcher` to use a supplier for
the context, rather than the context itself.

This allow exceptions to be propagated to subclasses which may choose
to deal with them.

See gh-12238

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/security/reactive/EndpointRequest.java

@@ -23,6 +23,7 @@ import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Objects;
 import java.util.Set;
+import java.util.function.Supplier;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
@@ -132,10 +133,10 @@ public final class EndpointRequest {
 		}
 
 		@Override
-		protected void initialized(PathMappedEndpoints pathMappedEndpoints) {
+		protected void initialized(Supplier<PathMappedEndpoints> pathMappedEndpoints) {
 			Set<String> paths = new LinkedHashSet<>();
 			if (this.includes.isEmpty()) {
-				paths.addAll(pathMappedEndpoints.getAllPaths());
+				paths.addAll(pathMappedEndpoints.get().getAllPaths());
 			}
 			streamPaths(this.includes, pathMappedEndpoints).forEach(paths::add);
 			streamPaths(this.excludes, pathMappedEndpoints).forEach(paths::remove);
@@ -143,9 +144,9 @@ public final class EndpointRequest {
 		}
 
 		private Stream<String> streamPaths(List<Object> source,
-				PathMappedEndpoints pathMappedEndpoints) {
+				Supplier<PathMappedEndpoints> pathMappedEndpoints) {
 			return source.stream().filter(Objects::nonNull).map(this::getEndpointId)
-					.map(pathMappedEndpoints::getPath);
+					.map(pathMappedEndpoints.get()::getPath);
 		}
 
 		private String getEndpointId(Object source) {
@@ -173,7 +174,7 @@ public final class EndpointRequest {
 
 		@Override
 		protected Mono<MatchResult> matches(ServerWebExchange exchange,
-				PathMappedEndpoints context) {
+				Supplier<PathMappedEndpoints> context) {
 			return this.delegate.matches(exchange);
 		}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/security/servlet/EndpointRequest.java

@@ -23,6 +23,7 @@ import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Objects;
 import java.util.Set;
+import java.util.function.Supplier;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
@@ -129,13 +130,13 @@ public final class EndpointRequest {
 		}
 
 		@Override
-		protected void initialized(PathMappedEndpoints pathMappedEndpoints) {
+		protected void initialized(Supplier<PathMappedEndpoints> pathMappedEndpoints) {
 			Set<String> paths = new LinkedHashSet<>();
 			if (this.includes.isEmpty()) {
-				paths.addAll(pathMappedEndpoints.getAllPaths());
+				paths.addAll(pathMappedEndpoints.get().getAllPaths());
 			}
-			streamPaths(this.includes, pathMappedEndpoints).forEach(paths::add);
-			streamPaths(this.excludes, pathMappedEndpoints).forEach(paths::remove);
+			streamPaths(this.includes, pathMappedEndpoints.get()).forEach(paths::add);
+			streamPaths(this.excludes, pathMappedEndpoints.get()).forEach(paths::remove);
 			this.delegate = new OrRequestMatcher(getDelegateMatchers(paths));
 		}
 
@@ -169,7 +170,7 @@ public final class EndpointRequest {
 
 		@Override
 		protected boolean matches(HttpServletRequest request,
-				PathMappedEndpoints context) {
+				Supplier<PathMappedEndpoints> context) {
 			return this.delegate.matches(request);
 		}
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/servlet/PathRequest.java

@@ -16,6 +16,8 @@
 
 package org.springframework.boot.autoconfigure.security.servlet;
 
+import java.util.function.Supplier;
+
 import javax.servlet.http.HttpServletRequest;
 
 import org.springframework.boot.autoconfigure.h2.H2ConsoleProperties;
@@ -69,14 +71,14 @@ public final class PathRequest {
 		}
 
 		@Override
-		protected void initialized(H2ConsoleProperties h2ConsoleProperties) {
+		protected void initialized(Supplier<H2ConsoleProperties> h2ConsoleProperties) {
 			this.delegate = new AntPathRequestMatcher(
-					h2ConsoleProperties.getPath() + "/**");
+					h2ConsoleProperties.get().getPath() + "/**");
 		}
 
 		@Override
 		protected boolean matches(HttpServletRequest request,
-				H2ConsoleProperties context) {
+				Supplier<H2ConsoleProperties> context) {
 			return this.delegate.matches(request);
 		}
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/servlet/StaticResourceRequest.java

@@ -20,6 +20,7 @@ import java.util.EnumSet;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.function.Supplier;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
@@ -133,8 +134,9 @@ public final class StaticResourceRequest {
 		}
 
 		@Override
-		protected void initialized(ServerProperties serverProperties) {
-			this.delegate = new OrRequestMatcher(getDelegateMatchers(serverProperties));
+		protected void initialized(Supplier<ServerProperties> serverProperties) {
+			this.delegate = new OrRequestMatcher(
+					getDelegateMatchers(serverProperties.get()));
 		}
 
 		private List<RequestMatcher> getDelegateMatchers(
@@ -149,7 +151,8 @@ public final class StaticResourceRequest {
 		}
 
 		@Override
-		protected boolean matches(HttpServletRequest request, ServerProperties context) {
+		protected boolean matches(HttpServletRequest request,
+				Supplier<ServerProperties> context) {
 			return this.delegate.matches(request);
 		}
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/security/reactive/ApplicationContextServerWebExchangeMatcher.java

@@ -16,9 +16,10 @@
 
 package org.springframework.boot.security.reactive;
 
+import java.util.function.Supplier;
+
 import reactor.core.publisher.Mono;
 
-import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
 import org.springframework.context.ApplicationContext;
 import org.springframework.security.web.server.util.matcher.ServerWebExchangeMatcher;
@@ -32,9 +33,8 @@ import org.springframework.web.server.ServerWebExchange;
  * that is autowired in the usual way.
  *
  * @param <C> The type of the context that the match method actually needs to use. Can be
- * an {@link ApplicationContext}, a class of an {@link ApplicationContext#getBean(Class)
- * existing bean} or a custom type that will be
- * {@link AutowireCapableBeanFactory#createBean(Class, int, boolean) created} on demand.
+ * an {@link ApplicationContext} or a class of an {@link ApplicationContext#getBean(Class)
+ * existing bean}.
  * @author Madhura Bhave
  * @since 2.0.0
  */
@@ -43,7 +43,7 @@ public abstract class ApplicationContextServerWebExchangeMatcher<C>
 
 	private final Class<? extends C> contextClass;
 
-	private volatile C context;
+	private volatile Supplier<C> context;
 
 	private final Object contextLock = new Object();
 
@@ -60,12 +60,13 @@ public abstract class ApplicationContextServerWebExchangeMatcher<C>
 	/**
 	 * Decides whether the rule implemented by the strategy matches the supplied exchange.
 	 * @param exchange the source exchange
-	 * @param context the context instance
+	 * @param context a supplier for the initialized context (may throw an exception)
 	 * @return if the exchange matches
 	 */
-	protected abstract Mono<MatchResult> matches(ServerWebExchange exchange, C context);
+	protected abstract Mono<MatchResult> matches(ServerWebExchange exchange,
+			Supplier<C> context);
 
-	protected C getContext(ServerWebExchange exchange) {
+	protected Supplier<C> getContext(ServerWebExchange exchange) {
 		if (this.context == null) {
 			synchronized (this.contextLock) {
 				if (this.context == null) {
@@ -79,26 +80,19 @@ public abstract class ApplicationContextServerWebExchangeMatcher<C>
 
 	/**
 	 * Called once the context has been initialized.
-	 * @param context the initialized context
+	 * @param context a supplier for the initialized context (may throw an exception)
 	 */
-	protected void initialized(C context) {
+	protected void initialized(Supplier<C> context) {
 	}
 
 	@SuppressWarnings("unchecked")
-	private C createContext(ServerWebExchange exchange) {
+	private Supplier<C> createContext(ServerWebExchange exchange) {
 		ApplicationContext context = exchange.getApplicationContext();
 		Assert.state(context != null, "No WebApplicationContext found.");
 		if (this.contextClass.isInstance(context)) {
-			return (C) context;
-		}
-		try {
-			return context.getBean(this.contextClass);
-		}
-		catch (NoSuchBeanDefinitionException ex) {
-			return (C) context.getAutowireCapableBeanFactory().createBean(
-					this.contextClass, AutowireCapableBeanFactory.AUTOWIRE_CONSTRUCTOR,
-					false);
+			return () -> (C) context;
 		}
+		return () -> context.getBean(this.contextClass);
 	}
 
 }

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/security/servlet/ApplicationContextRequestMatcher.java

@@ -16,9 +16,10 @@
 
 package org.springframework.boot.security.servlet;
 
+import java.util.function.Supplier;
+
 import javax.servlet.http.HttpServletRequest;
 
-import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
 import org.springframework.context.ApplicationContext;
 import org.springframework.security.web.util.matcher.RequestMatcher;
@@ -33,9 +34,8 @@ import org.springframework.web.context.support.WebApplicationContextUtils;
  * that is autowired in the usual way.
  *
  * @param <C> The type of the context that the match method actually needs to use. Can be
- * an {@link ApplicationContext}, a class of an {@link ApplicationContext#getBean(Class)
- * existing bean} or a custom type that will be
- * {@link AutowireCapableBeanFactory#createBean(Class, int, boolean) created} on demand.
+ * an {@link ApplicationContext} or a class of an {@link ApplicationContext#getBean(Class)
+ * existing bean}.
  * @author Phillip Webb
  * @since 2.0.0
  */
@@ -43,7 +43,7 @@ public abstract class ApplicationContextRequestMatcher<C> implements RequestMatc
 
 	private final Class<? extends C> contextClass;
 
-	private volatile C context;
+	private volatile Supplier<C> context;
 
 	private final Object contextLock = new Object();
 
@@ -60,12 +60,12 @@ public abstract class ApplicationContextRequestMatcher<C> implements RequestMatc
 	/**
 	 * Decides whether the rule implemented by the strategy matches the supplied request.
 	 * @param request the source request
-	 * @param context the context instance
+	 * @param context a supplier for the initialized context (may throw an exception)
 	 * @return if the request matches
 	 */
-	protected abstract boolean matches(HttpServletRequest request, C context);
+	protected abstract boolean matches(HttpServletRequest request, Supplier<C> context);
 
-	private C getContext(HttpServletRequest request) {
+	private Supplier<C> getContext(HttpServletRequest request) {
 		if (this.context == null) {
 			synchronized (this.contextLock) {
 				if (this.context == null) {
@@ -79,26 +79,19 @@ public abstract class ApplicationContextRequestMatcher<C> implements RequestMatc
 
 	/**
 	 * Called once the context has been initialized.
-	 * @param context the initialized context
+	 * @param context a supplier for the initialized context (may throw an exception)
 	 */
-	protected void initialized(C context) {
+	protected void initialized(Supplier<C> context) {
 	}
 
 	@SuppressWarnings("unchecked")
-	private C createContext(HttpServletRequest request) {
+	private Supplier<C> createContext(HttpServletRequest request) {
 		WebApplicationContext context = WebApplicationContextUtils
 				.getRequiredWebApplicationContext(request.getServletContext());
 		if (this.contextClass.isInstance(context)) {
-			return (C) context;
-		}
-		try {
-			return context.getBean(this.contextClass);
-		}
-		catch (NoSuchBeanDefinitionException ex) {
-			return (C) context.getAutowireCapableBeanFactory().createBean(
-					this.contextClass, AutowireCapableBeanFactory.AUTOWIRE_CONSTRUCTOR,
-					false);
+			return () -> (C) context;
 		}
+		return () -> context.getBean(this.contextClass);
 	}
 
 }

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/security/reactive/ApplicationContextServerWebExchangeMatcherTests.java

@@ -16,11 +16,14 @@
 
 package org.springframework.boot.security.reactive;
 
+import java.util.function.Supplier;
+
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 import reactor.core.publisher.Mono;
 
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.StaticApplicationContext;
 import org.springframework.http.server.reactive.ServerHttpRequest;
@@ -58,8 +61,8 @@ public class ApplicationContextServerWebExchangeMatcherTests {
 		StaticApplicationContext context = (StaticApplicationContext) exchange
 				.getApplicationContext();
 		assertThat(new TestApplicationContextServerWebExchangeMatcher<>(
-				ApplicationContext.class).callMatchesAndReturnProvidedContext(exchange))
-						.isEqualTo(context);
+				ApplicationContext.class).callMatchesAndReturnProvidedContext(exchange)
+						.get()).isEqualTo(context);
 	}
 
 	@Test
@@ -70,19 +73,17 @@ public class ApplicationContextServerWebExchangeMatcherTests {
 		context.registerSingleton("existingBean", ExistingBean.class);
 		assertThat(
 				new TestApplicationContextServerWebExchangeMatcher<>(ExistingBean.class)
-						.callMatchesAndReturnProvidedContext(exchange))
+						.callMatchesAndReturnProvidedContext(exchange).get())
 								.isEqualTo(context.getBean(ExistingBean.class));
 	}
 
 	@Test
-	public void matchesWhenContextClassIsNewBeanShouldProvideBean() {
+	public void matchesWhenContextClassIsMissingBeanShouldProvideException() {
 		ServerWebExchange exchange = createHttpWebHandlerAdapter();
-		StaticApplicationContext context = (StaticApplicationContext) exchange
-				.getApplicationContext();
-		context.registerSingleton("existingBean", ExistingBean.class);
-		assertThat(new TestApplicationContextServerWebExchangeMatcher<>(NewBean.class)
-				.callMatchesAndReturnProvidedContext(exchange).getBean())
-						.isEqualTo(context.getBean(ExistingBean.class));
+		Supplier<ExistingBean> supplier = new TestApplicationContextServerWebExchangeMatcher<>(
+				ExistingBean.class).callMatchesAndReturnProvidedContext(exchange);
+		this.thrown.expect(NoSuchBeanDefinitionException.class);
+		supplier.get();
 	}
 
 	@Test
@@ -139,24 +140,25 @@ public class ApplicationContextServerWebExchangeMatcherTests {
 	static class TestApplicationContextServerWebExchangeMatcher<C>
 			extends ApplicationContextServerWebExchangeMatcher<C> {
 
-		private C providedContext;
+		private Supplier<C> providedContext;
 
 		TestApplicationContextServerWebExchangeMatcher(Class<? extends C> context) {
 			super(context);
 		}
 
-		C callMatchesAndReturnProvidedContext(ServerWebExchange exchange) {
+		Supplier<C> callMatchesAndReturnProvidedContext(ServerWebExchange exchange) {
 			matches(exchange);
 			return getProvidedContext();
 		}
 
 		@Override
-		protected Mono<MatchResult> matches(ServerWebExchange exchange, C context) {
+		protected Mono<MatchResult> matches(ServerWebExchange exchange,
+				Supplier<C> context) {
 			this.providedContext = context;
 			return MatchResult.match();
 		}
 
-		C getProvidedContext() {
+		Supplier<C> getProvidedContext() {
 			return this.providedContext;
 		}
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/security/servlet/ApplicationContextRequestMatcherTests.java

@@ -16,12 +16,15 @@
 
 package org.springframework.boot.security.servlet;
 
+import java.util.function.Supplier;
+
 import javax.servlet.http.HttpServletRequest;
 
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.context.ApplicationContext;
 import org.springframework.mock.web.MockHttpServletRequest;
 import org.springframework.mock.web.MockServletContext;
@@ -51,7 +54,7 @@ public class ApplicationContextRequestMatcherTests {
 	public void matchesWhenContextClassIsApplicationContextShouldProvideContext() {
 		StaticWebApplicationContext context = createWebApplicationContext();
 		assertThat(new TestApplicationContextRequestMatcher<>(ApplicationContext.class)
-				.callMatchesAndReturnProvidedContext(context)).isEqualTo(context);
+				.callMatchesAndReturnProvidedContext(context).get()).isEqualTo(context);
 	}
 
 	@Test
@@ -59,17 +62,17 @@ public class ApplicationContextRequestMatcherTests {
 		StaticWebApplicationContext context = createWebApplicationContext();
 		context.registerSingleton("existingBean", ExistingBean.class);
 		assertThat(new TestApplicationContextRequestMatcher<>(ExistingBean.class)
-				.callMatchesAndReturnProvidedContext(context))
+				.callMatchesAndReturnProvidedContext(context).get())
 						.isEqualTo(context.getBean(ExistingBean.class));
 	}
 
 	@Test
-	public void matchesWhenContextClassIsNewBeanShouldProvideBean() {
+	public void matchesWhenContextClassIsBeanThatDoesntExistShouldSupplyException() {
 		StaticWebApplicationContext context = createWebApplicationContext();
-		context.registerSingleton("existingBean", ExistingBean.class);
-		assertThat(new TestApplicationContextRequestMatcher<>(NewBean.class)
-				.callMatchesAndReturnProvidedContext(context).getBean())
-						.isEqualTo(context.getBean(ExistingBean.class));
+		Supplier<ExistingBean> supplier = new TestApplicationContextRequestMatcher<>(
+				ExistingBean.class).callMatchesAndReturnProvidedContext(context);
+		this.thrown.expect(NoSuchBeanDefinitionException.class);
+		supplier.get();
 	}
 
 	private StaticWebApplicationContext createWebApplicationContext() {
@@ -102,29 +105,31 @@ public class ApplicationContextRequestMatcherTests {
 	static class TestApplicationContextRequestMatcher<C>
 			extends ApplicationContextRequestMatcher<C> {
 
-		private C providedContext;
+		private Supplier<C> providedContext;
 
 		TestApplicationContextRequestMatcher(Class<? extends C> context) {
 			super(context);
 		}
 
-		public C callMatchesAndReturnProvidedContext(WebApplicationContext context) {
+		public Supplier<C> callMatchesAndReturnProvidedContext(
+				WebApplicationContext context) {
 			return callMatchesAndReturnProvidedContext(
 					new MockHttpServletRequest(context.getServletContext()));
 		}
 
-		public C callMatchesAndReturnProvidedContext(HttpServletRequest request) {
+		public Supplier<C> callMatchesAndReturnProvidedContext(
+				HttpServletRequest request) {
 			matches(request);
 			return getProvidedContext();
 		}
 
 		@Override
-		protected boolean matches(HttpServletRequest request, C context) {
+		protected boolean matches(HttpServletRequest request, Supplier<C> context) {
 			this.providedContext = context;
 			return false;
 		}
 
-		public C getProvidedContext() {
+		public Supplier<C> getProvidedContext() {
 			return this.providedContext;
 		}