Fix path stripper in JolokiaEndpoint to account for management.contextPath

When the user sets management.contextPath=/admin the Jolokia
endpoint gets mapped to /admin/jolokia, but that the path stripper it uses
internally makes a false assumption about the form of the request path.
The fix is simple (just use a smarter search for the endpoint path in the
request path).

Fixes gh-642

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/mvc/JolokiaMvcEndpoint.java

@@ -133,8 +133,8 @@ public class JolokiaMvcEndpoint implements MvcEndpoint, InitializingBean,
 		@Override
 		public String getPathInfo() {
 			String value = super.getRequestURI();
-			if (value.startsWith(this.path)) {
-				value = value.substring(this.path.length());
+			if (value.contains(this.path)) {
+				value = value.substring(value.indexOf(this.path) + this.path.length());
 			}
 			int index = value.indexOf("?");
 			if (index > 0) {

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

@@ -0,0 +1,94 @@
+/*
+ * Copyright 2013-2014 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.mvc;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration;
+import org.springframework.boot.actuate.autoconfigure.JolokiaAutoConfiguration;
+import org.springframework.boot.actuate.autoconfigure.ManagementServerPropertiesAutoConfiguration;
+import org.springframework.boot.actuate.endpoint.mvc.JolokiaEndpointContextPathTests.Config;
+import org.springframework.boot.actuate.endpoint.mvc.JolokiaEndpointContextPathTests.ContextPathListener;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.boot.test.EnvironmentTestUtils;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+/**
+ * @author Christian Dupuis
+ * @author Dave Syer
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = { Config.class }, initializers = ContextPathListener.class)
+@WebAppConfiguration
+public class JolokiaEndpointContextPathTests {
+
+	@Autowired
+	private MvcEndpoints endpoints;
+
+	@Autowired
+	private WebApplicationContext context;
+
+	private MockMvc mvc;
+
+	@Before
+	public void setUp() {
+		this.mvc = MockMvcBuilders.webAppContextSetup(this.context).build();
+		EnvironmentTestUtils.addEnvironment(
+				(ConfigurableApplicationContext) this.context, "foo:bar");
+	}
+
+	@Test
+	public void read() throws Exception {
+		this.mvc.perform(get("/admin/jolokia/read/java.lang:type=Memory"))
+				.andExpect(status().isOk())
+				.andExpect(content().string(containsString("NonHeapMemoryUsage")));
+	}
+
+	@Configuration
+	@EnableConfigurationProperties
+	@EnableWebMvc
+	@Import({ EndpointWebMvcAutoConfiguration.class, JolokiaAutoConfiguration.class,
+			ManagementServerPropertiesAutoConfiguration.class })
+	public static class Config {
+	}
+
+	public static class ContextPathListener implements
+			ApplicationContextInitializer<ConfigurableApplicationContext> {
+		@Override
+		public void initialize(ConfigurableApplicationContext context) {
+			EnvironmentTestUtils.addEnvironment(context, "management.contextPath:/admin");
+		}
+
+	}
+}