Add /mappings endpoint

Lists AbstractUrlMappings and AbstractHandlerMethodMappings
in a loose Map structure. E.g.

{
  "/**/favicon.ico": {
    "bean": "faviconHandlerMapping"
  },
  "/**": {
    "bean": "resourceHandlerMapping"
  },
  "/webjars/**": {
    "bean": "resourceHandlerMapping"
  },
  "{[/error],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}":
     {
       "bean": "requestMappingHandlerMapping",
       "method": "public java.util.Map<java.lang.String, java.lang.Object> org.springframework.boot.actuate.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)"
...
}

Fixes gh-378

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/EndpointAutoConfigurationTests.java

@@ -28,6 +28,7 @@ import org.springframework.boot.actuate.endpoint.EnvironmentEndpoint;
 import org.springframework.boot.actuate.endpoint.HealthEndpoint;
 import org.springframework.boot.actuate.endpoint.InfoEndpoint;
 import org.springframework.boot.actuate.endpoint.MetricsEndpoint;
+import org.springframework.boot.actuate.endpoint.RequestMappingEndpoint;
 import org.springframework.boot.actuate.endpoint.ShutdownEndpoint;
 import org.springframework.boot.actuate.endpoint.TraceEndpoint;
 import org.springframework.boot.autoconfigure.condition.ConditionEvaluationReport;
@@ -75,6 +76,7 @@ public class EndpointAutoConfigurationTests {
 		assertNotNull(this.context.getBean(MetricsEndpoint.class));
 		assertNotNull(this.context.getBean(ShutdownEndpoint.class));
 		assertNotNull(this.context.getBean(TraceEndpoint.class));
+		assertNotNull(this.context.getBean(RequestMappingEndpoint.class));
 	}
 
 	@Test

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/RequestMappingEndpointTests.java

@@ -0,0 +1,107 @@
+/*
+ * Copyright 2012-2013 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.endpoint;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Map;
+
+import org.junit.Test;
+import org.springframework.boot.actuate.endpoint.mvc.EndpointHandlerMapping;
+import org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter;
+import org.springframework.context.support.StaticApplicationContext;
+import org.springframework.web.servlet.handler.AbstractHandlerMethodMapping;
+import org.springframework.web.servlet.handler.AbstractUrlHandlerMapping;
+import org.springframework.web.servlet.handler.SimpleUrlHandlerMapping;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * @author Dave Syer
+ */
+public class RequestMappingEndpointTests {
+
+	private RequestMappingEndpoint endpoint = new RequestMappingEndpoint();
+
+	@Test
+	public void concreteUrlMappings() {
+		SimpleUrlHandlerMapping mapping = new SimpleUrlHandlerMapping();
+		mapping.setUrlMap(Collections.singletonMap("/foo", new Object()));
+		mapping.setApplicationContext(new StaticApplicationContext());
+		mapping.initApplicationContext();
+		this.endpoint.setHandlerMappings(Collections
+				.<AbstractUrlHandlerMapping> singletonList(mapping));
+		Map<String, Object> result = this.endpoint.invoke();
+		assertEquals(1, result.size());
+		@SuppressWarnings("unchecked")
+		Map<String, Object> map = (Map<String, Object>) result.get("/foo");
+		assertEquals("java.lang.Object", map.get("type"));
+	}
+
+	@Test
+	public void beanUrlMappings() {
+		StaticApplicationContext context = new StaticApplicationContext();
+		SimpleUrlHandlerMapping mapping = new SimpleUrlHandlerMapping();
+		mapping.setUrlMap(Collections.singletonMap("/foo", new Object()));
+		mapping.setApplicationContext(context);
+		mapping.initApplicationContext();
+		context.getDefaultListableBeanFactory().registerSingleton("mapping", mapping);
+		this.endpoint.setApplicationContext(context);
+		Map<String, Object> result = this.endpoint.invoke();
+		assertEquals(1, result.size());
+		@SuppressWarnings("unchecked")
+		Map<String, Object> map = (Map<String, Object>) result.get("/foo");
+		assertEquals("mapping", map.get("bean"));
+	}
+
+	@Test
+	public void beanMethodMappings() {
+		StaticApplicationContext context = new StaticApplicationContext();
+		EndpointHandlerMapping mapping = new EndpointHandlerMapping(
+				Arrays.asList(new EndpointMvcAdapter(new DumpEndpoint())));
+		mapping.setApplicationContext(new StaticApplicationContext());
+		mapping.afterPropertiesSet();
+		context.getDefaultListableBeanFactory().registerSingleton("mapping", mapping);
+		this.endpoint.setApplicationContext(context);
+		Map<String, Object> result = this.endpoint.invoke();
+		assertEquals(1, result.size());
+		assertTrue(result.keySet().iterator().next().contains("/dump"));
+		@SuppressWarnings("unchecked")
+		Map<String, Object> handler = (Map<String, Object>) result.values().iterator()
+				.next();
+		assertTrue(handler.containsKey("method"));
+	}
+
+	@Test
+	public void concreteMethodMappings() {
+		EndpointHandlerMapping mapping = new EndpointHandlerMapping(
+				Arrays.asList(new EndpointMvcAdapter(new DumpEndpoint())));
+		mapping.setApplicationContext(new StaticApplicationContext());
+		mapping.afterPropertiesSet();
+		this.endpoint.setMethodMappings(Collections
+				.<AbstractHandlerMethodMapping<?>> singletonList(mapping));
+		Map<String, Object> result = this.endpoint.invoke();
+		assertEquals(1, result.size());
+		assertTrue(result.keySet().iterator().next().contains("/dump"));
+		@SuppressWarnings("unchecked")
+		Map<String, Object> handler = (Map<String, Object>) result.values().iterator()
+				.next();
+		assertTrue(handler.containsKey("method"));
+	}
+
+}