feat(components): add camel-observability-services

Closes CAMEL-21384

bom/camel-bom/pom.xml

@@ -1512,6 +1512,11 @@
         <artifactId>camel-oaipmh</artifactId>
         <version>4.9.0-SNAPSHOT</version>
       </dependency>
+      <dependency>
+        <groupId>org.apache.camel</groupId>
+        <artifactId>camel-observability-services</artifactId>
+        <version>4.9.0-SNAPSHOT</version>
+      </dependency>
       <dependency>
         <groupId>org.apache.camel</groupId>
         <artifactId>camel-observation</artifactId>

catalog/camel-allcomponents/pom.xml

@@ -1326,6 +1326,11 @@
             <artifactId>camel-oaipmh</artifactId>
             <version>${project.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.camel</groupId>
+            <artifactId>camel-observability-services</artifactId>
+            <version>${project.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.apache.camel</groupId>
             <artifactId>camel-observation</artifactId>

components/camel-observability-services/pom.xml

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    Licensed to the Apache Software Foundation (ASF) under one or more
+    contributor license agreements.  See the NOTICE file distributed with
+    this work for additional information regarding copyright ownership.
+    The ASF licenses this file to You 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.
+
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.apache.camel</groupId>
+        <artifactId>components</artifactId>
+        <version>4.9.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>camel-observability-services</artifactId>
+    <packaging>jar</packaging>
+    <name>Camel :: Observability Services</name>
+    <description>Camel Observability Services for Camel Main</description>
+
+    <properties>
+        <firstVersion>4.9.0</firstVersion>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.camel</groupId>
+            <artifactId>camel-micrometer-prometheus</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

components/camel-observability-services/src/main/docs/observability-services.adoc

@@ -0,0 +1,39 @@
+= Observability Services Component
+:doctitle: Observability Services
+:shortname: observability-services
+:artifactid: camel-observability-services
+:description: Camel Observability Services for Camel Main
+:since: 4.9
+:supportlevel: Stable
+:tabs-sync-option:
+
+*Since Camel {since}*
+
+The Camel Observability Services component is used to run Camel standalone (Camel Main) and provide a set of opinionated components and configuration which simplify operations such as observability on cloud environments. Although the component is mainly targeted for cloud, it can be used in any other environment, giving to the Camel application the capability to expose a set of observability features by default.
+
+== Usage
+
+=== Auto-detection from classpath
+
+All you need to do is to add the `camel-observability-services` dependency to the classpath. There's no need to add any further configuration. Each individual component will be configured using each own default settings except the endpoint which will be exposed in `/camel/<service>` by default.
+
+If you need to customize each of the different components provided within this service, then, you can specify in the `application.properties` each of the configuration as it would be done normally when you provide the individual component.
+
+WARNING: the customization of the configuration for this component is not available for Spring Boot runtime due to a https://github.com/spring-projects/spring-boot/issues/24688[known limitation]. You can use this component in Spring Boot runtime with the default settings only. If you need to provide any customization, you'll need to provide each component and configuration accordingly.
+
+== Components available
+
+The presence of this dependency will provide the following components:
+
+* camel-micrometer-prometheus
+
+=== List of known endpoints
+
+The presence of this dependency will expose the following endpoints:
+
+|====
+|Endpoint | Description
+
+| `/camel/metrics` | metrics exposed as in Micrometer Prometheus Registry
+
+|====

components/camel-observability-services/src/main/resources/observability-services.properties

@@ -0,0 +1,21 @@
+## ---------------------------------------------------------------------------
+## Licensed to the Apache Software Foundation (ASF) under one or more
+## contributor license agreements.  See the NOTICE file distributed with
+## this work for additional information regarding copyright ownership.
+## The ASF licenses this file to You 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.
+## ---------------------------------------------------------------------------
+camel.server.enabled=true
+camel.server.metricsEnabled=true
+camel.metrics.enabled=true
+# Default metrics endpoint
+camel.metrics.path=/camel/metrics

components/pom.xml

@@ -278,7 +278,7 @@
         <module>camel-snakeyaml</module>
         <module>camel-snmp</module>
         <module>camel-soap</module>
-        <module>camel-solr</module>        
+        <module>camel-solr</module>
         <module>camel-splunk</module>
         <module>camel-splunk-hec</module>
         <module>camel-spring-batch</module>
@@ -337,6 +337,8 @@
         <module>camel-rest-openapi</module>
         <!-- build jooq last as it cause component builds to be slower afterwards -->
         <module>camel-jooq</module>
+        <!-- observability-services requires the availability of other components -->
+        <module>camel-observability-services</module>
     </modules>
 
     <properties>

core/camel-main/src/main/java/org/apache/camel/main/BaseMainSupport.java

@@ -145,7 +145,8 @@ public abstract class BaseMainSupport extends BaseService {
     protected final OrderedLocationProperties wildcardProperties = new OrderedLocationProperties();
     protected RoutesCollector routesCollector = new DefaultRoutesCollector();
     protected String propertyPlaceholderLocations;
-    protected String defaultPropertyPlaceholderLocation = MainConstants.DEFAULT_PROPERTY_PLACEHOLDER_LOCATION;
+    protected String defaultPropertyPlaceholderLocation
+            = MainConstants.DEFAULT_PROPERTY_PLACEHOLDER_LOCATION + "," + MainConstants.DEFAULT_OBSERVABILITY_SERVICES_PROPERTY_LOCATION ;
     protected Properties initialProperties;
     protected Properties overrideProperties;
     protected boolean standalone = true;

core/camel-main/src/main/java/org/apache/camel/main/MainConstants.java

@@ -19,6 +19,7 @@
 public final class MainConstants {
 
     public static final String DEFAULT_PROPERTY_PLACEHOLDER_LOCATION = "classpath:application.properties;optional=true";
+    public static final String DEFAULT_OBSERVABILITY_SERVICES_PROPERTY_LOCATION = "classpath:observability-services.properties;optional=true";
     public static final String INITIAL_PROPERTIES_LOCATION = "camel.main.initial-properties-location";
     public static final String OVERRIDE_PROPERTIES_LOCATION = "camel.main.override-properties-location";
     public static final String CLOUD_PROPERTIES_LOCATION = "camel.main.cloud-properties-location";

parent/pom.xml

@@ -275,7 +275,7 @@
         <jedis-client-version>5.2.0</jedis-client-version>
         <jetcd-version>0.8.3</jetcd-version>
         <jetty-version>12.0.15</jetty-version>
-        <jetty-for-solr-version>10.0.20</jetty-for-solr-version>        
+        <jetty-for-solr-version>10.0.20</jetty-for-solr-version>
         <jetty-plugin-version>${jetty-version}</jetty-plugin-version>
         <jetty-runner-groupId>org.eclipse.jetty</jetty-runner-groupId>
         <jettison-version>1.5.4</jettison-version>
@@ -1959,6 +1959,11 @@
                 <artifactId>camel-oaipmh</artifactId>
                 <version>${project.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.apache.camel</groupId>
+                <artifactId>camel-observability-services</artifactId>
+                <version>${project.version}</version>
+            </dependency>
             <dependency>
                 <groupId>org.apache.camel</groupId>
                 <artifactId>camel-observation</artifactId>
@@ -2913,7 +2918,7 @@
             If we import the grpc-bom, we get a lot of duplicate dependencies
             and conflicts between BOMs.  The only way is to manually manage
             those dependencies.
-            
+
             <dependency>
                 <groupId>io.grpc</groupId>
                 <artifactId>grpc-bom</artifactId>