Allow multiple endpoint PathMapper beans

Update `WebEndpointDiscoverer` and related classes to that multiple
`PathMapper` beans can be registered. Mappers are now tried in order
until one returns a non-null value.

Closes gh-14841

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/CloudFoundryWebEndpointDiscoverer.java

@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.autoconfigure.cloudfoundry;
 
 import java.util.Collection;
+import java.util.List;
 
 import org.springframework.boot.actuate.endpoint.EndpointFilter;
 import org.springframework.boot.actuate.endpoint.invoke.OperationInvokerAdvisor;
@@ -45,17 +46,17 @@ public class CloudFoundryWebEndpointDiscoverer extends WebEndpointDiscoverer {
 	 * @param applicationContext the source application context
 	 * @param parameterValueMapper the parameter value mapper
 	 * @param endpointMediaTypes the endpoint media types
-	 * @param endpointPathMapper the endpoint path mapper
+	 * @param endpointPathMappers the endpoint path mappers
 	 * @param invokerAdvisors invoker advisors to apply
 	 * @param filters filters to apply
 	 */
 	public CloudFoundryWebEndpointDiscoverer(ApplicationContext applicationContext,
 			ParameterValueMapper parameterValueMapper,
-			EndpointMediaTypes endpointMediaTypes, PathMapper endpointPathMapper,
+			EndpointMediaTypes endpointMediaTypes, List<PathMapper> endpointPathMappers,
 			Collection<OperationInvokerAdvisor> invokerAdvisors,
 			Collection<EndpointFilter<ExposableWebEndpoint>> filters) {
 		super(applicationContext, parameterValueMapper, endpointMediaTypes,
-				endpointPathMapper, invokerAdvisors, filters);
+				endpointPathMappers, invokerAdvisors, filters);
 	}
 
 	@Override

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/ReactiveCloudFoundryActuatorAutoConfiguration.java

@@ -33,7 +33,6 @@ import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
 import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
 import org.springframework.boot.actuate.endpoint.web.ExposableWebEndpoint;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.ControllerEndpointsSupplier;
 import org.springframework.boot.actuate.health.HealthEndpoint;
 import org.springframework.boot.actuate.health.ReactiveHealthEndpointWebExtension;
@@ -95,9 +94,8 @@ public class ReactiveCloudFoundryActuatorAutoConfiguration {
 			WebClient.Builder webClientBuilder,
 			ControllerEndpointsSupplier controllerEndpointsSupplier) {
 		CloudFoundryWebEndpointDiscoverer endpointDiscoverer = new CloudFoundryWebEndpointDiscoverer(
-				this.applicationContext, parameterMapper, endpointMediaTypes,
+				this.applicationContext, parameterMapper, endpointMediaTypes, null,
-				PathMapper.useEndpointId(), Collections.emptyList(),
+				Collections.emptyList(), Collections.emptyList());
-				Collections.emptyList());
 		CloudFoundrySecurityInterceptor securityInterceptor = getSecurityInterceptor(
 				webClientBuilder, this.applicationContext.getEnvironment());
 		Collection<ExposableWebEndpoint> webEndpoints = endpointDiscoverer.getEndpoints();

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/servlet/CloudFoundryActuatorAutoConfiguration.java

@@ -32,7 +32,6 @@ import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
 import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
 import org.springframework.boot.actuate.endpoint.web.ExposableWebEndpoint;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.ControllerEndpointsSupplier;
 import org.springframework.boot.actuate.endpoint.web.annotation.ServletEndpointsSupplier;
 import org.springframework.boot.actuate.health.HealthEndpoint;
@@ -99,9 +98,8 @@ public class CloudFoundryActuatorAutoConfiguration {
 			ServletEndpointsSupplier servletEndpointsSupplier,
 			ControllerEndpointsSupplier controllerEndpointsSupplier) {
 		CloudFoundryWebEndpointDiscoverer discoverer = new CloudFoundryWebEndpointDiscoverer(
-				this.applicationContext, parameterMapper, endpointMediaTypes,
+				this.applicationContext, parameterMapper, endpointMediaTypes, null,
-				PathMapper.useEndpointId(), Collections.emptyList(),
+				Collections.emptyList(), Collections.emptyList());
-				Collections.emptyList());
 		CloudFoundrySecurityInterceptor securityInterceptor = getSecurityInterceptor(
 				restTemplateBuilder, this.applicationContext.getEnvironment());
 		Collection<ExposableWebEndpoint> webEndpoints = discoverer.getEndpoints();

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/MappingWebEndpointPathMapper.java

@@ -21,6 +21,8 @@ import java.util.Map;
 
 import org.springframework.boot.actuate.endpoint.EndpointId;
 import org.springframework.boot.actuate.endpoint.web.PathMapper;
+import org.springframework.core.Ordered;
+import org.springframework.core.annotation.Order;
 import org.springframework.util.StringUtils;
 
 /**
@@ -29,6 +31,7 @@ import org.springframework.util.StringUtils;
  *
  * @author Stephane Nicoll
  */
+@Order(Ordered.HIGHEST_PRECEDENCE)
 class MappingWebEndpointPathMapper implements PathMapper {
 
 	private final Map<EndpointId, String> pathMapping;
@@ -42,8 +45,7 @@ class MappingWebEndpointPathMapper implements PathMapper {
 	@Override
 	public String getRootPath(EndpointId endpointId) {
 		String path = this.pathMapping.get(endpointId);
-		return StringUtils.hasText(path) ? path
+		return StringUtils.hasText(path) ? path : null;
-				: PathMapper.useEndpointId().getRootPath(endpointId);
 	}
 
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/WebEndpointAutoConfiguration.java

@@ -80,7 +80,6 @@ public class WebEndpointAutoConfiguration {
 	}
 
 	@Bean
-	@ConditionalOnMissingBean
 	public PathMapper webEndpointPathMapper() {
 		return new MappingWebEndpointPathMapper(this.properties.getPathMapping());
 	}
@@ -95,11 +94,13 @@ public class WebEndpointAutoConfiguration {
 	@ConditionalOnMissingBean(WebEndpointsSupplier.class)
 	public WebEndpointDiscoverer webEndpointDiscoverer(
 			ParameterValueMapper parameterValueMapper,
-			EndpointMediaTypes endpointMediaTypes, PathMapper webEndpointPathMapper,
+			EndpointMediaTypes endpointMediaTypes,
+			ObjectProvider<PathMapper> endpointPathMappers,
 			ObjectProvider<OperationInvokerAdvisor> invokerAdvisors,
 			ObjectProvider<EndpointFilter<ExposableWebEndpoint>> filters) {
 		return new WebEndpointDiscoverer(this.applicationContext, parameterValueMapper,
-				endpointMediaTypes, webEndpointPathMapper,
+				endpointMediaTypes,
+				endpointPathMappers.orderedStream().collect(Collectors.toList()),
 				invokerAdvisors.orderedStream().collect(Collectors.toList()),
 				filters.orderedStream().collect(Collectors.toList()));
 	}
@@ -107,10 +108,11 @@ public class WebEndpointAutoConfiguration {
 	@Bean
 	@ConditionalOnMissingBean(ControllerEndpointsSupplier.class)
 	public ControllerEndpointDiscoverer controllerEndpointDiscoverer(
-			PathMapper webEndpointPathMapper,
+			ObjectProvider<PathMapper> endpointPathMappers,
 			ObjectProvider<Collection<EndpointFilter<ExposableControllerEndpoint>>> filters) {
 		return new ControllerEndpointDiscoverer(this.applicationContext,
-				webEndpointPathMapper, filters.getIfAvailable(Collections::emptyList));
+				endpointPathMappers.orderedStream().collect(Collectors.toList()),
+				filters.getIfAvailable(Collections::emptyList));
 	}
 
 	@Bean
@@ -144,10 +146,11 @@ public class WebEndpointAutoConfiguration {
 		@Bean
 		@ConditionalOnMissingBean(ServletEndpointsSupplier.class)
 		public ServletEndpointDiscoverer servletEndpointDiscoverer(
-				ApplicationContext applicationContext, PathMapper webEndpointPathMapper,
+				ApplicationContext applicationContext,
+				ObjectProvider<PathMapper> endpointPathMappers,
 				ObjectProvider<EndpointFilter<ExposableServletEndpoint>> filters) {
 			return new ServletEndpointDiscoverer(applicationContext,
-					webEndpointPathMapper,
+					endpointPathMappers.orderedStream().collect(Collectors.toList()),
 					filters.orderedStream().collect(Collectors.toList()));
 		}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/CloudFoundryWebEndpointDiscovererTests.java

@@ -95,7 +95,8 @@ public class CloudFoundryWebEndpointDiscovererTests {
 					Collections.singletonList("application/json"),
 					Collections.singletonList("application/json"));
 			CloudFoundryWebEndpointDiscoverer discoverer = new CloudFoundryWebEndpointDiscoverer(
-					context, parameterMapper, mediaTypes, endpointPathMapper,
+					context, parameterMapper, mediaTypes,
+					Collections.singletonList(endpointPathMapper),
 					Collections.singleton(new CachingOperationInvokerAdvisor(timeToLive)),
 					Collections.emptyList());
 			consumer.accept(discoverer);

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/CloudFoundryWebFluxEndpointIntegrationTests.java

@@ -36,7 +36,6 @@ import org.springframework.boot.actuate.endpoint.invoke.convert.ConversionServic
 import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
 import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.WebEndpointDiscoverer;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.autoconfigure.web.reactive.HttpHandlerAutoConfiguration;
@@ -220,8 +219,8 @@ public class CloudFoundryWebFluxEndpointIntegrationTests {
 			ParameterValueMapper parameterMapper = new ConversionServiceParameterValueMapper(
 					DefaultConversionService.getSharedInstance());
 			return new WebEndpointDiscoverer(applicationContext, parameterMapper,
-					endpointMediaTypes, PathMapper.useEndpointId(),
+					endpointMediaTypes, null, Collections.emptyList(),
-					Collections.emptyList(), Collections.emptyList());
+					Collections.emptyList());
 		}
 
 		@Bean

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/servlet/CloudFoundryMvcWebEndpointIntegrationTests.java

@@ -36,7 +36,6 @@ import org.springframework.boot.actuate.endpoint.invoke.convert.ConversionServic
 import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
 import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.WebEndpointDiscoverer;
 import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
 import org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext;
@@ -219,8 +218,8 @@ public class CloudFoundryMvcWebEndpointIntegrationTests {
 			ParameterValueMapper parameterMapper = new ConversionServiceParameterValueMapper(
 					DefaultConversionService.getSharedInstance());
 			return new WebEndpointDiscoverer(applicationContext, parameterMapper,
-					endpointMediaTypes, PathMapper.useEndpointId(),
+					endpointMediaTypes, null, Collections.emptyList(),
-					Collections.emptyList(), Collections.emptyList());
+					Collections.emptyList());
 		}
 
 		@Bean

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/MappingWebEndpointPathMapperTests.java

@@ -21,6 +21,7 @@ import java.util.Collections;
 import org.junit.Test;
 
 import org.springframework.boot.actuate.endpoint.EndpointId;
+import org.springframework.boot.actuate.endpoint.web.PathMapper;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -35,29 +36,32 @@ public class MappingWebEndpointPathMapperTests {
 	public void defaultConfiguration() {
 		MappingWebEndpointPathMapper mapper = new MappingWebEndpointPathMapper(
 				Collections.emptyMap());
-		assertThat(mapper.getRootPath(EndpointId.of("test"))).isEqualTo("test");
+		assertThat(PathMapper.getRootPath(Collections.singletonList(mapper),
+				EndpointId.of("test"))).isEqualTo("test");
 	}
 
 	@Test
 	public void userConfiguration() {
 		MappingWebEndpointPathMapper mapper = new MappingWebEndpointPathMapper(
 				Collections.singletonMap("test", "custom"));
-		assertThat(mapper.getRootPath(EndpointId.of("test"))).isEqualTo("custom");
+		assertThat(PathMapper.getRootPath(Collections.singletonList(mapper),
+				EndpointId.of("test"))).isEqualTo("custom");
 	}
 
 	@Test
 	public void mixedCaseDefaultConfiguration() {
 		MappingWebEndpointPathMapper mapper = new MappingWebEndpointPathMapper(
 				Collections.emptyMap());
-		assertThat(mapper.getRootPath(EndpointId.of("testEndpoint")))
+		assertThat(PathMapper.getRootPath(Collections.singletonList(mapper),
-				.isEqualTo("testEndpoint");
+				EndpointId.of("testEndpoint"))).isEqualTo("testEndpoint");
 	}
 
 	@Test
 	public void mixedCaseUserConfiguration() {
 		MappingWebEndpointPathMapper mapper = new MappingWebEndpointPathMapper(
 				Collections.singletonMap("test-endpoint", "custom"));
-		assertThat(mapper.getRootPath(EndpointId.of("testEndpoint"))).isEqualTo("custom");
+		assertThat(PathMapper.getRootPath(Collections.singletonList(mapper),
+				EndpointId.of("testEndpoint"))).isEqualTo("custom");
 	}
 
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/WebEndpointAutoConfigurationTests.java

@@ -16,13 +16,21 @@
 
 package org.springframework.boot.actuate.autoconfigure.endpoint.web;
 
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
+import java.util.stream.Collectors;
+
 import org.junit.Test;
 
 import org.springframework.boot.actuate.autoconfigure.endpoint.EndpointAutoConfiguration;
 import org.springframework.boot.actuate.autoconfigure.endpoint.ExposeExcludePropertyEndpointFilter;
 import org.springframework.boot.actuate.endpoint.EndpointId;
+import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
 import org.springframework.boot.actuate.endpoint.http.ActuatorMediaType;
 import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
+import org.springframework.boot.actuate.endpoint.web.ExposableWebEndpoint;
+import org.springframework.boot.actuate.endpoint.web.PathMappedEndpoint;
 import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.ControllerEndpointDiscoverer;
 import org.springframework.boot.actuate.endpoint.web.annotation.ServletEndpointDiscoverer;
@@ -30,6 +38,7 @@ import org.springframework.boot.actuate.endpoint.web.annotation.WebEndpointDisco
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.boot.test.context.runner.WebApplicationContextRunner;
+import org.springframework.stereotype.Component;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -71,6 +80,27 @@ public class WebEndpointAutoConfigurationTests {
 				});
 	}
 
+	@Test
+	public void webApplicationSupportCustomPathMatcher() {
+		this.contextRunner
+				.withPropertyValues("management.endpoints.web.exposure.include=*",
+						"management.endpoints.web.path-mapping.testanotherone=foo")
+				.withUserConfiguration(TestPathMatcher.class, TestOneEndpoint.class,
+						TestAnotherOneEndpoint.class, TestTwoEndpoint.class)
+				.run((context) -> {
+					WebEndpointDiscoverer discoverer = context
+							.getBean(WebEndpointDiscoverer.class);
+					Collection<ExposableWebEndpoint> endpoints = discoverer
+							.getEndpoints();
+					ExposableWebEndpoint[] webEndpoints = endpoints
+							.toArray(new ExposableWebEndpoint[0]);
+					List<String> paths = Arrays.stream(webEndpoints)
+							.map(PathMappedEndpoint::getRootPath)
+							.collect(Collectors.toList());
+					assertThat(paths).containsOnly("1/testone", "foo", "testtwo");
+				});
+	}
+
 	@Test
 	public void webApplicationConfiguresEndpointDiscoverer() {
 		this.contextRunner.run((context) -> {
@@ -100,4 +130,35 @@ public class WebEndpointAutoConfigurationTests {
 						.doesNotHaveBean(ServletEndpointDiscoverer.class));
 	}
 
+	@Component
+	private static class TestPathMatcher implements PathMapper {
+
+		@Override
+		public String getRootPath(EndpointId endpointId) {
+			if (endpointId.toString().endsWith("one")) {
+				return "1/" + endpointId.toString();
+			}
+			return null;
+		}
+
+	}
+
+	@Component
+	@Endpoint(id = "testone")
+	private static class TestOneEndpoint {
+
+	}
+
+	@Component
+	@Endpoint(id = "testanotherone")
+	private static class TestAnotherOneEndpoint {
+
+	}
+
+	@Component
+	@Endpoint(id = "testtwo")
+	private static class TestTwoEndpoint {
+
+	}
+
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/jolokia/JolokiaEndpointAutoConfigurationTests.java

@@ -26,7 +26,6 @@ import org.springframework.boot.actuate.autoconfigure.endpoint.web.ServletEndpoi
 import org.springframework.boot.actuate.autoconfigure.web.server.ManagementContextAutoConfiguration;
 import org.springframework.boot.actuate.autoconfigure.web.servlet.ServletManagementContextAutoConfiguration;
 import org.springframework.boot.actuate.endpoint.web.ExposableServletEndpoint;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.ServletEndpointDiscoverer;
 import org.springframework.boot.actuate.endpoint.web.annotation.ServletEndpointsSupplier;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
@@ -102,8 +101,8 @@ public class JolokiaEndpointAutoConfigurationTests {
 		@Bean
 		public ServletEndpointDiscoverer servletEndpointDiscoverer(
 				ApplicationContext applicationContext) {
-			return new ServletEndpointDiscoverer(applicationContext,
+			return new ServletEndpointDiscoverer(applicationContext, null,
-					PathMapper.useEndpointId(), Collections.emptyList());
+					Collections.emptyList());
 		}
 
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/PathMapper.java

@@ -16,7 +16,11 @@
 
 package org.springframework.boot.actuate.endpoint.web;
 
+import java.util.List;
+
 import org.springframework.boot.actuate.endpoint.EndpointId;
+import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
 
 /**
  * Strategy interface used to provide a mapping between an endpoint ID and the root path
@@ -30,18 +34,42 @@ import org.springframework.boot.actuate.endpoint.EndpointId;
 public interface PathMapper {
 
 	/**
-	 * Resolve the root path for the endpoint with the specified {@code endpointId}.
+	 * Resolve the root path for the specified {@code endpointId}.
 	 * @param endpointId the id of an endpoint
-	 * @return the path of the endpoint
+	 * @return the path of the endpoint or {@code null} if this mapper doesn't support the
+	 * given endpoint ID
 	 */
 	String getRootPath(EndpointId endpointId);
 
 	/**
 	 * Returns an {@link PathMapper} that uses the endpoint ID as the path.
 	 * @return an {@link PathMapper} that uses the lowercase endpoint ID as the path
+	 * @deprecated since 2.1.0 in favor of {@link #getRootPath(List, EndpointId)} with a
+	 * {@code null} list
 	 */
+	@Deprecated
 	static PathMapper useEndpointId() {
 		return (id) -> id.toString();
 	}
 
+	/**
+	 * Resolve the root path for the specified {@code endpointId} from the given path
+	 * mappers. If no mapper matches then the ID itself is returned.
+	 * @param pathMappers the path mappers (may be {@code null})
+	 * @param endpointId the id of an endpoint
+	 * @return the path of the endpoint
+	 */
+	static String getRootPath(List<PathMapper> pathMappers, EndpointId endpointId) {
+		Assert.notNull(endpointId, "EndpointId must not be null");
+		if (pathMappers != null) {
+			for (PathMapper mapper : pathMappers) {
+				String path = mapper.getRootPath(endpointId);
+				if (StringUtils.hasText(path)) {
+					return path;
+				}
+			}
+		}
+		return endpointId.toString();
+	}
+
 }

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/annotation/ControllerEndpointDiscoverer.java

@@ -18,6 +18,7 @@ package org.springframework.boot.actuate.endpoint.web.annotation;
 
 import java.util.Collection;
 import java.util.Collections;
+import java.util.List;
 
 import org.springframework.boot.actuate.endpoint.EndpointFilter;
 import org.springframework.boot.actuate.endpoint.EndpointId;
@@ -29,7 +30,6 @@ import org.springframework.boot.actuate.endpoint.invoke.ParameterValueMapper;
 import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.context.ApplicationContext;
 import org.springframework.core.annotation.AnnotatedElementUtils;
-import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 
 /**
@@ -43,21 +43,20 @@ public class ControllerEndpointDiscoverer
 		extends EndpointDiscoverer<ExposableControllerEndpoint, Operation>
 		implements ControllerEndpointsSupplier {
 
-	private final PathMapper endpointPathMapper;
+	private final List<PathMapper> endpointPathMappers;
 
 	/**
 	 * Create a new {@link ControllerEndpointDiscoverer} instance.
 	 * @param applicationContext the source application context
-	 * @param endpointPathMapper the endpoint path mapper
+	 * @param endpointPathMappers the endpoint path mappers
 	 * @param filters filters to apply
 	 */
 	public ControllerEndpointDiscoverer(ApplicationContext applicationContext,
-			PathMapper endpointPathMapper,
+			List<PathMapper> endpointPathMappers,
 			Collection<EndpointFilter<ExposableControllerEndpoint>> filters) {
 		super(applicationContext, ParameterValueMapper.NONE, Collections.emptyList(),
 				filters);
-		Assert.notNull(endpointPathMapper, "EndpointPathMapper must not be null");
+		this.endpointPathMappers = endpointPathMappers;
-		this.endpointPathMapper = endpointPathMapper;
 	}
 
 	@Override
@@ -70,7 +69,7 @@ public class ControllerEndpointDiscoverer
 	@Override
 	protected ExposableControllerEndpoint createEndpoint(Object endpointBean,
 			EndpointId id, boolean enabledByDefault, Collection<Operation> operations) {
-		String rootPath = this.endpointPathMapper.getRootPath(id);
+		String rootPath = PathMapper.getRootPath(this.endpointPathMappers, id);
 		return new DiscoveredControllerEndpoint(this, endpointBean, id, rootPath,
 				enabledByDefault);
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/annotation/ServletEndpointDiscoverer.java

@@ -18,6 +18,7 @@ package org.springframework.boot.actuate.endpoint.web.annotation;
 
 import java.util.Collection;
 import java.util.Collections;
+import java.util.List;
 
 import org.springframework.boot.actuate.endpoint.EndpointFilter;
 import org.springframework.boot.actuate.endpoint.EndpointId;
@@ -30,7 +31,6 @@ import org.springframework.boot.actuate.endpoint.web.ExposableServletEndpoint;
 import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.context.ApplicationContext;
 import org.springframework.core.annotation.AnnotatedElementUtils;
-import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 
 /**
@@ -43,21 +43,20 @@ public class ServletEndpointDiscoverer
 		extends EndpointDiscoverer<ExposableServletEndpoint, Operation>
 		implements ServletEndpointsSupplier {
 
-	private final PathMapper endpointPathMapper;
+	private final List<PathMapper> endpointPathMappers;
 
 	/**
 	 * Create a new {@link ServletEndpointDiscoverer} instance.
 	 * @param applicationContext the source application context
-	 * @param endpointPathMapper the endpoint path mapper
+	 * @param endpointPathMappers the endpoint path mappers
 	 * @param filters filters to apply
 	 */
 	public ServletEndpointDiscoverer(ApplicationContext applicationContext,
-			PathMapper endpointPathMapper,
+			List<PathMapper> endpointPathMappers,
 			Collection<EndpointFilter<ExposableServletEndpoint>> filters) {
 		super(applicationContext, ParameterValueMapper.NONE, Collections.emptyList(),
 				filters);
-		Assert.notNull(endpointPathMapper, "EndpointPathMapper must not be null");
+		this.endpointPathMappers = endpointPathMappers;
-		this.endpointPathMapper = endpointPathMapper;
 	}
 
 	@Override
@@ -69,7 +68,7 @@ public class ServletEndpointDiscoverer
 	@Override
 	protected ExposableServletEndpoint createEndpoint(Object endpointBean, EndpointId id,
 			boolean enabledByDefault, Collection<Operation> operations) {
-		String rootPath = this.endpointPathMapper.getRootPath(id);
+		String rootPath = PathMapper.getRootPath(this.endpointPathMappers, id);
 		return new DiscoveredServletEndpoint(this, endpointBean, id, rootPath,
 				enabledByDefault);
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/annotation/WebEndpointDiscoverer.java

@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.endpoint.web.annotation;
 
 import java.util.Collection;
+import java.util.List;
 
 import org.springframework.boot.actuate.endpoint.EndpointFilter;
 import org.springframework.boot.actuate.endpoint.EndpointId;
@@ -32,7 +33,6 @@ import org.springframework.boot.actuate.endpoint.web.WebEndpointsSupplier;
 import org.springframework.boot.actuate.endpoint.web.WebOperation;
 import org.springframework.boot.actuate.endpoint.web.WebOperationRequestPredicate;
 import org.springframework.context.ApplicationContext;
-import org.springframework.util.Assert;
 
 /**
  * {@link EndpointDiscoverer} for {@link ExposableWebEndpoint web endpoints}.
@@ -44,7 +44,7 @@ public class WebEndpointDiscoverer
 		extends EndpointDiscoverer<ExposableWebEndpoint, WebOperation>
 		implements WebEndpointsSupplier {
 
-	private final PathMapper endpointPathMapper;
+	private final List<PathMapper> endpointPathMappers;
 
 	private final RequestPredicateFactory requestPredicateFactory;
 
@@ -53,25 +53,24 @@ public class WebEndpointDiscoverer
 	 * @param applicationContext the source application context
 	 * @param parameterValueMapper the parameter value mapper
 	 * @param endpointMediaTypes the endpoint media types
-	 * @param endpointPathMapper the endpoint path mapper
+	 * @param endpointPathMappers the endpoint path mappers
 	 * @param invokerAdvisors invoker advisors to apply
 	 * @param filters filters to apply
 	 */
 	public WebEndpointDiscoverer(ApplicationContext applicationContext,
 			ParameterValueMapper parameterValueMapper,
-			EndpointMediaTypes endpointMediaTypes, PathMapper endpointPathMapper,
+			EndpointMediaTypes endpointMediaTypes, List<PathMapper> endpointPathMappers,
 			Collection<OperationInvokerAdvisor> invokerAdvisors,
 			Collection<EndpointFilter<ExposableWebEndpoint>> filters) {
 		super(applicationContext, parameterValueMapper, invokerAdvisors, filters);
-		Assert.notNull(endpointPathMapper, "EndpointPathMapper must not be null");
+		this.endpointPathMappers = endpointPathMappers;
-		this.endpointPathMapper = endpointPathMapper;
 		this.requestPredicateFactory = new RequestPredicateFactory(endpointMediaTypes);
 	}
 
 	@Override
 	protected ExposableWebEndpoint createEndpoint(Object endpointBean, EndpointId id,
 			boolean enabledByDefault, Collection<WebOperation> operations) {
-		String rootPath = this.endpointPathMapper.getRootPath(id);
+		String rootPath = PathMapper.getRootPath(this.endpointPathMappers, id);
 		return new DiscoveredWebEndpoint(this, endpointBean, id, rootPath,
 				enabledByDefault, operations);
 	}
@@ -79,7 +78,7 @@ public class WebEndpointDiscoverer
 	@Override
 	protected WebOperation createOperation(EndpointId endpointId,
 			DiscoveredOperationMethod operationMethod, OperationInvoker invoker) {
-		String rootPath = this.endpointPathMapper.getRootPath(endpointId);
+		String rootPath = PathMapper.getRootPath(this.endpointPathMappers, endpointId);
 		WebOperationRequestPredicate requestPredicate = this.requestPredicateFactory
 				.getRequestPredicate(endpointId, rootPath, operationMethod);
 		return new DiscoveredWebOperation(endpointId, operationMethod, invoker,

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/annotation/BaseConfiguration.java

@@ -24,7 +24,6 @@ import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
 import org.springframework.boot.actuate.endpoint.invoke.ParameterValueMapper;
 import org.springframework.boot.actuate.endpoint.invoke.convert.ConversionServiceParameterValueMapper;
 import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.Bean;
@@ -68,7 +67,7 @@ class BaseConfiguration {
 		ParameterValueMapper parameterMapper = new ConversionServiceParameterValueMapper(
 				DefaultConversionService.getSharedInstance());
 		return new WebEndpointDiscoverer(applicationContext, parameterMapper,
-				endpointMediaTypes(), PathMapper.useEndpointId(), Collections.emptyList(),
+				endpointMediaTypes(), null, Collections.emptyList(),
 				Collections.emptyList());
 	}
 

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/annotation/ControllerEndpointDiscovererTests.java

@@ -29,7 +29,6 @@ import org.springframework.boot.actuate.endpoint.ExposableEndpoint;
 import org.springframework.boot.actuate.endpoint.annotation.DiscoveredEndpoint;
 import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
 import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration;
 import org.springframework.boot.test.context.assertj.AssertableApplicationContext;
@@ -153,7 +152,7 @@ public class ControllerEndpointDiscovererTests {
 			Consumer<ControllerEndpointDiscoverer> consumer) {
 		return (context) -> {
 			ControllerEndpointDiscoverer discoverer = new ControllerEndpointDiscoverer(
-					context, PathMapper.useEndpointId(), Collections.emptyList());
+					context, null, Collections.emptyList());
 			consumer.accept(discoverer);
 		};
 	}

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/annotation/ServletEndpointDiscovererTests.java

@@ -38,7 +38,6 @@ import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
 import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
 import org.springframework.boot.actuate.endpoint.web.EndpointServlet;
 import org.springframework.boot.actuate.endpoint.web.ExposableServletEndpoint;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration;
 import org.springframework.boot.test.context.assertj.AssertableApplicationContext;
@@ -152,7 +151,7 @@ public class ServletEndpointDiscovererTests {
 			Consumer<ServletEndpointDiscoverer> consumer) {
 		return (context) -> {
 			ServletEndpointDiscoverer discoverer = new ServletEndpointDiscoverer(context,
-					PathMapper.useEndpointId(), Collections.emptyList());
+					null, Collections.emptyList());
 			consumer.accept(discoverer);
 		};
 	}

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/annotation/WebEndpointDiscovererTests.java

@@ -261,7 +261,8 @@ public class WebEndpointDiscovererTests {
 					Collections.singletonList("application/json"),
 					Collections.singletonList("application/json"));
 			WebEndpointDiscoverer discoverer = new WebEndpointDiscoverer(context,
-					parameterMapper, mediaTypes, endpointPathMapper,
+					parameterMapper, mediaTypes,
+					Collections.singletonList(endpointPathMapper),
 					Collections.singleton(new CachingOperationInvokerAdvisor(timeToLive)),
 					Collections.emptyList());
 			consumer.accept(discoverer);

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/reactive/ControllerEndpointHandlerMappingIntegrationTests.java

@@ -25,7 +25,6 @@ import java.util.function.Consumer;
 import org.junit.Test;
 
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.ControllerEndpointDiscoverer;
 import org.springframework.boot.actuate.endpoint.web.annotation.ControllerEndpointsSupplier;
 import org.springframework.boot.actuate.endpoint.web.annotation.RestControllerEndpoint;
@@ -128,8 +127,8 @@ public class ControllerEndpointHandlerMappingIntegrationTests {
 		@Bean
 		public ControllerEndpointDiscoverer webEndpointDiscoverer(
 				ApplicationContext applicationContext) {
-			return new ControllerEndpointDiscoverer(applicationContext,
+			return new ControllerEndpointDiscoverer(applicationContext, null,
-					PathMapper.useEndpointId(), Collections.emptyList());
+					Collections.emptyList());
 		}
 
 		@Bean

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/servlet/ControllerEndpointHandlerMappingIntegrationTests.java

@@ -25,7 +25,6 @@ import java.util.function.Consumer;
 import org.junit.Test;
 
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.ControllerEndpointDiscoverer;
 import org.springframework.boot.actuate.endpoint.web.annotation.ControllerEndpointsSupplier;
 import org.springframework.boot.actuate.endpoint.web.annotation.RestControllerEndpoint;
@@ -122,8 +121,8 @@ public class ControllerEndpointHandlerMappingIntegrationTests {
 		@Bean
 		public ControllerEndpointDiscoverer webEndpointDiscoverer(
 				ApplicationContext applicationContext) {
-			return new ControllerEndpointDiscoverer(applicationContext,
+			return new ControllerEndpointDiscoverer(applicationContext, null,
-					PathMapper.useEndpointId(), Collections.emptyList());
+					Collections.emptyList());
 		}
 
 		@Bean

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/test/JerseyEndpointsRunner.java

@@ -34,7 +34,6 @@ import org.springframework.boot.actuate.endpoint.invoke.convert.ConversionServic
 import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
 import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.WebEndpointDiscoverer;
 import org.springframework.boot.actuate.endpoint.web.jersey.JerseyEndpointResourceFactory;
 import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
@@ -102,8 +101,8 @@ class JerseyEndpointsRunner extends AbstractWebEndpointRunner {
 					mediaTypes);
 			WebEndpointDiscoverer discoverer = new WebEndpointDiscoverer(
 					this.applicationContext, new ConversionServiceParameterValueMapper(),
-					endpointMediaTypes, PathMapper.useEndpointId(),
+					endpointMediaTypes, null, Collections.emptyList(),
-					Collections.emptyList(), Collections.emptyList());
+					Collections.emptyList());
 			Collection<Resource> resources = new JerseyEndpointResourceFactory()
 					.createEndpointResources(new EndpointMapping("/actuator"),
 							discoverer.getEndpoints(), endpointMediaTypes,

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/test/WebFluxEndpointsRunner.java

@@ -28,7 +28,6 @@ import org.springframework.boot.actuate.endpoint.invoke.convert.ConversionServic
 import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
 import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.WebEndpointDiscoverer;
 import org.springframework.boot.actuate.endpoint.web.reactive.WebFluxEndpointHandlerMapping;
 import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
@@ -108,8 +107,8 @@ class WebFluxEndpointsRunner extends AbstractWebEndpointRunner {
 					mediaTypes);
 			WebEndpointDiscoverer discoverer = new WebEndpointDiscoverer(
 					this.applicationContext, new ConversionServiceParameterValueMapper(),
-					endpointMediaTypes, PathMapper.useEndpointId(),
+					endpointMediaTypes, null, Collections.emptyList(),
-					Collections.emptyList(), Collections.emptyList());
+					Collections.emptyList());
 			return new WebFluxEndpointHandlerMapping(new EndpointMapping("/actuator"),
 					discoverer.getEndpoints(), endpointMediaTypes,
 					new CorsConfiguration(),

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/test/WebMvcEndpointRunner.java

@@ -28,7 +28,6 @@ import org.springframework.boot.actuate.endpoint.invoke.convert.ConversionServic
 import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
 import org.springframework.boot.actuate.endpoint.web.EndpointMediaTypes;
-import org.springframework.boot.actuate.endpoint.web.PathMapper;
 import org.springframework.boot.actuate.endpoint.web.annotation.WebEndpointDiscoverer;
 import org.springframework.boot.actuate.endpoint.web.servlet.WebMvcEndpointHandlerMapping;
 import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
@@ -91,8 +90,8 @@ class WebMvcEndpointRunner extends AbstractWebEndpointRunner {
 					mediaTypes);
 			WebEndpointDiscoverer discoverer = new WebEndpointDiscoverer(
 					this.applicationContext, new ConversionServiceParameterValueMapper(),
-					endpointMediaTypes, PathMapper.useEndpointId(),
+					endpointMediaTypes, null, Collections.emptyList(),
-					Collections.emptyList(), Collections.emptyList());
+					Collections.emptyList());
 			return new WebMvcEndpointHandlerMapping(new EndpointMapping("/actuator"),
 					discoverer.getEndpoints(), endpointMediaTypes,
 					new CorsConfiguration(),