Add autoconfiguration for Micrometer tracing

This will activate in a Spring Boot 3 application if there is a
dependency on one of the micrometer bridge jars, e.g.
io.micrometer:micrometer-tracing-bridge-{otel,brave}.

Author: Dave Syer

build.gradle

@@ -186,9 +186,11 @@ allprojects { project ->
             }
         }
 
+        ext['micrometer.version'] = '1.10.3'
+
         ext {
-            micrometerVersion = '1.10.3'
             // not explicitly needed in subprojects, as the BOM for Spring Boot sets this version
+            micrometerVersion = dependencyManagement.importedProperties['micrometer.version']
             springFrameworkVersion = dependencyManagement.importedProperties['spring-framework.version']
             springSecurityVersion = dependencyManagement.importedProperties['spring-security.version']
             springCloudCommonsVersion = dependencyManagement.importedProperties['spring-cloud-commons.version']

grpc-client-spring-boot-autoconfigure/build.gradle

@@ -16,6 +16,7 @@ dependencies {
     api project(':grpc-common-spring-boot')
     api 'org.springframework.boot:spring-boot-starter'
     api 'jakarta.validation:jakarta.validation-api'
+    optionalSupportImplementation "io.micrometer:micrometer-observation"
     optionalSupportImplementation 'org.springframework.boot:spring-boot-starter-actuator'
     optionalSupportImplementation 'org.springframework.cloud:spring-cloud-starter-consul-discovery'
     optionalSupportImplementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client'

grpc-client-spring-boot-autoconfigure/src/main/java/net/devh/boot/grpc/client/autoconfigure/GrpcClientMicrometerTraceAutoConfiguration.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2016-2022 Michael Zhang <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package net.devh.boot.grpc.client.autoconfigure;
+
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.annotation.Order;
+
+import io.grpc.ClientInterceptor;
+import io.micrometer.core.instrument.binder.grpc.ObservationGrpcClientInterceptor;
+import io.micrometer.observation.ObservationRegistry;
+import net.devh.boot.grpc.client.interceptor.GrpcGlobalClientInterceptor;
+import net.devh.boot.grpc.common.autoconfigure.GrpcCommonTraceAutoConfiguration;
+import net.devh.boot.grpc.common.util.InterceptorOrder;
+
+/**
+ * The configuration used to configure micrometer tracing for grpc.
+ *
+ * @author Dave Syer ([email protected])
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnProperty(value = "management.tracing.grpc.enabled", matchIfMissing = true)
+@AutoConfigureAfter(value = GrpcCommonTraceAutoConfiguration.class,
+        name = "org.springframework.boot.actuate.autoconfigure.observation.ObservationAutoConfiguration")
+@ConditionalOnBean(ObservationRegistry.class)
+public class GrpcClientMicrometerTraceAutoConfiguration {
+
+    /**
+     * Configures a global client interceptor that applies micrometer tracing logic to the requests.
+     *
+     * @param observations The observation registry bean.
+     * @return The tracing client interceptor bean.
+     */
+    @GrpcGlobalClientInterceptor
+    @Order(InterceptorOrder.ORDER_TRACING_METRICS + 1)
+    ClientInterceptor globalObservationClientInterceptorConfigurer(final ObservationRegistry observations) {
+        return new ObservationGrpcClientInterceptor(observations);
+    }
+
+}

grpc-client-spring-boot-autoconfigure/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

@@ -1,5 +1,6 @@
 net.devh.boot.grpc.client.autoconfigure.GrpcClientAutoConfiguration
 net.devh.boot.grpc.client.autoconfigure.GrpcClientMetricAutoConfiguration
 net.devh.boot.grpc.client.autoconfigure.GrpcClientHealthAutoConfiguration
+net.devh.boot.grpc.client.autoconfigure.GrpcClientMicrometerTraceAutoConfiguration
 net.devh.boot.grpc.client.autoconfigure.GrpcClientSecurityAutoConfiguration
 net.devh.boot.grpc.client.autoconfigure.GrpcDiscoveryClientAutoConfiguration

grpc-server-spring-boot-autoconfigure/build.gradle

@@ -15,6 +15,7 @@ dependencies {
 
     api project(':grpc-common-spring-boot')
     api 'org.springframework.boot:spring-boot-starter'
+    optionalSupportImplementation "io.micrometer:micrometer-observation"
     optionalSupportImplementation 'org.springframework.boot:spring-boot-starter-actuator'
     optionalSupportImplementation 'org.springframework.security:spring-security-core'
     optionalSupportImplementation 'org.springframework.cloud:spring-cloud-starter-consul-discovery'

grpc-server-spring-boot-autoconfigure/src/main/java/net/devh/boot/grpc/server/autoconfigure/GrpcServerMicrometerTraceAutoConfiguration.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2016-2022 Michael Zhang <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package net.devh.boot.grpc.server.autoconfigure;
+
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.annotation.Order;
+
+import io.grpc.ServerInterceptor;
+import io.micrometer.core.instrument.binder.grpc.ObservationGrpcServerInterceptor;
+import io.micrometer.observation.ObservationRegistry;
+import net.devh.boot.grpc.common.autoconfigure.GrpcCommonTraceAutoConfiguration;
+import net.devh.boot.grpc.common.util.InterceptorOrder;
+import net.devh.boot.grpc.server.interceptor.GrpcGlobalServerInterceptor;
+
+/**
+ * The configuration used to configure micrometer tracing for grpc.
+ *
+ * @author Dave Syer ([email protected])
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnProperty(value = "management.tracing.grpc.enabled", matchIfMissing = true)
+@AutoConfigureAfter(value = GrpcCommonTraceAutoConfiguration.class,
+        name = "org.springframework.boot.actuate.autoconfigure.observation.ObservationAutoConfiguration")
+@ConditionalOnBean(ObservationRegistry.class)
+public class GrpcServerMicrometerTraceAutoConfiguration {
+
+    /**
+     * Configures a global server interceptor that applies micrometer tracing logic to the requests.
+     *
+     * @param observations The observation registry.
+     * @return The tracing server interceptor bean.
+     */
+    @GrpcGlobalServerInterceptor
+    @Order(InterceptorOrder.ORDER_TRACING_METRICS + 1)
+    public ServerInterceptor globalObservationGrpcServerInterceptorConfigurer(final ObservationRegistry observations) {
+        return new ObservationGrpcServerInterceptor(observations);
+    }
+
+}

grpc-server-spring-boot-autoconfigure/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

@@ -8,4 +8,5 @@ net.devh.boot.grpc.server.autoconfigure.GrpcReflectionServiceAutoConfiguration
 net.devh.boot.grpc.server.autoconfigure.GrpcServerAutoConfiguration
 net.devh.boot.grpc.server.autoconfigure.GrpcServerFactoryAutoConfiguration
 net.devh.boot.grpc.server.autoconfigure.GrpcServerMetricAutoConfiguration
+net.devh.boot.grpc.server.autoconfigure.GrpcServerMicrometerTraceAutoConfiguration
 net.devh.boot.grpc.server.autoconfigure.GrpcServerSecurityAutoConfiguration