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CAMEL-22214: camel-groovy - Allow to pre-load groovy source files for shared functions and DTOs
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‎README.adoc‎

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=== Examples
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// examples: START
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Number of Examples: 63 (0 deprecated)
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Number of Examples: 64 (0 deprecated)
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[width="100%",cols="4,2,4",options="header"]
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|===
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| link:endpointdsl/readme.adoc[Endpointdsl] (endpointdsl) | Beginner | Using type-safe Endpoint DSL
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| link:groovy/README.adoc[Groovy] (groovy) | Beginner | An example for showing Camel Spring Boot using YAML with Groovy scripts
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| link:kamelet-chucknorris/readme.adoc[Kamelet Chucknorris] (kamelet-chucknorris) | Beginner | How easy it is to create your own Kamelets
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| link:pojo/README.adoc[Pojo] (pojo) | Beginner | An example showing how to work with Camel POJO routing with Spring Boot
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| link:fhir/readme.adoc[Fhir] (fhir) | Health Care | An example showing how to work with Camel, FHIR and Spring Boot
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| link:fhir-auth-tx/readme.adoc[Fhir Auth Tx] (fhir-auth-tx) | Health Care | An example showing how to work with Camel, FHIR Authorization, FHIR Transaction and Spring Boot
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| link:validator/readme.adoc[Validator Spring Boot] (validator) | Input/Output Type Contract | An example showing how to work with declarative validation and Spring Boot
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| link:metrics/README.adoc[Metrics] (metrics) | Management and Monitoring | An example showing how to work with Camel and Spring Boot and report metrics to Graphite
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| link:observation/README.adoc[Micrometer Observation] (observation) | Management and Monitoring | An example showing how to trace incoming and outgoing messages from Camel with Micrometer Observation
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| link:opentelemetry/README.adoc[OpenTelemetry] (opentelemetry) | Management and Monitoring | An example showing how to use Camel with OpenTelemetry
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| link:widget-gadget/README.adoc[Widget Gadget] (widget-gadget) | Messaging | The widget and gadget example from EIP book, running on Spring Boot
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| link:reactive-streams/readme.adoc[Reactive Streams] (reactive-streams) | Reactive | An example that shows how Camel can exchange data using reactive streams with Spring Boot reactor
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| link:http-ssl/README.adoc[Http Ssl] (http-ssl) | Rest | An example showing the Camel HTTP component with Spring Boot and SSL
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| link:http-streaming/README.adoc[Http Streaming] (http-streaming) | Rest | An example showing large data stream scenario using Camel Platform HTTP component
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| link:openapi-contract-first/readme.adoc[Openapi Contract First] (openapi-contract-first) | Rest | Contract First OpenAPI example
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| link:platform-http/README.adoc[Platform Http] (platform-http) | Rest | An example showing Camel REST DSL with platform HTTP
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| link:http-streaming/README.adoc[Http Streaming] (http-streaming) | Rest | This example shows how to stream large files using platform HTTP component
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| link:rest-cxf/README.adoc[Rest Cxf] (rest-cxf) | Rest | An example showing Camel REST using CXF with Spring Boot
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| link:rest-openapi/README.adoc[Rest Openapi] (rest-openapi) | Rest | An example showing Camel REST DSL and OpenApi with Spring Boot

‎groovy/README.adoc‎

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== Spring Boot Example with Yaml DSL and Groovy
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=== Introduction
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This example shows how to run Camel Spring Boot (YAML routes) with Groovy scripts
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for small functions and DTO classes.
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The Groovy source is located in `src/main/resources/camel-groovy`, which
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are pre-compiled on startup.
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This allows Camel routes to use the Groovy classes (as if they were Java classes).
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The route will then transform a JSon file into a DTO class using Jackson, and then
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enrich the DTO based on some business logic that are inlined Groovy script in the Camel route.
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=== Build
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You can build this example using:
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$ mvn package
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=== Run
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You can run this example using:
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$ mvn spring-boot:run
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And you should see output in the console.
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=== Help and contributions
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If you hit any problem using Camel or have some feedback, then please
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https://camel.apache.org/community/support/[let us know].
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We also love contributors, so
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https://camel.apache.org/community/contributing/[get involved] :-)
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The Camel riders!

‎groovy/data/order.json‎

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{
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"id": 432,
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"name": "Acme"
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}

‎groovy/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<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">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.apache.camel.springboot.example</groupId>
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<artifactId>examples</artifactId>
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<version>4.14.0-SNAPSHOT</version>
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</parent>
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<artifactId>camel-example-spring-boot-groovy</artifactId>
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<name>Camel SB Examples :: Groovy</name>
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<description>An example for showing Camel Spring Boot using YAML with Groovy scripts</description>
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<properties>
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<category>Beginner</category>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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</properties>
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<dependencyManagement>
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<dependencies>
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<!-- Camel BOM -->
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<dependency>
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<groupId>org.apache.camel.springboot</groupId>
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<artifactId>camel-spring-boot-bom</artifactId>
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<version>${project.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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<!-- Spring Boot BOM -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-dependencies</artifactId>
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<version>${spring-boot-version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<!-- Spring Boot -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter</artifactId>
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</dependency>
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<!-- Camel -->
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<dependency>
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<groupId>org.apache.camel.springboot</groupId>
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<artifactId>camel-spring-boot-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.camel.springboot</groupId>
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<artifactId>camel-yaml-dsl-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.camel.springboot</groupId>
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<artifactId>camel-groovy-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.camel.springboot</groupId>
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<artifactId>camel-file-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.camel.springboot</groupId>
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<artifactId>camel-jackson-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.camel.springboot</groupId>
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<artifactId>camel-log-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.camel.springboot</groupId>
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<artifactId>camel-timer-starter</artifactId>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<version>${spring-boot-version}</version>
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<executions>
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<execution>
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<goals>
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<goal>repackage</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</project>

‎groovy/src/main/java/sample/camel/MyApplication.java‎

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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.camel;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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/**
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* A sample Spring Boot application that starts the Camel routes.
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*/
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@SpringBootApplication
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public class MyApplication {
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/**
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* A main method to start this application.
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*/
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public static void main(String[] args) {
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SpringApplication.run(MyApplication.class, args);
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}
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}

‎groovy/src/main/resources/application.properties‎

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## ---------------------------------------------------------------------------
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## Licensed to the Apache Software Foundation (ASF) under one or more
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## contributor license agreements. See the NOTICE file distributed with
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## this work for additional information regarding copyright ownership.
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## The ASF licenses this file to You under the Apache License, Version 2.0
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## (the "License"); you may not use this file except in compliance with
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## the License. You may obtain a copy of the License at
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##
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## http://www.apache.org/licenses/LICENSE-2.0
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##
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## Unless required by applicable law or agreed to in writing, software
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## distributed under the License is distributed on an "AS IS" BASIS,
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## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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## See the License for the specific language governing permissions and
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## limitations under the License.
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## ---------------------------------------------------------------------------
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# give Camel a name
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camel.main.name = GroovyExample
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# keep camel running
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camel.main.run-controller = true

‎groovy/src/main/resources/camel-groovy/OrderDTO.groovy‎

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class OrderDTO {
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int id
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String name
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String level;
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String toString() {
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return "Order " + id + " from " + name + " (" + level + ")"
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}
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}

‎groovy/src/main/resources/camel-groovy/OrderService.groovy‎

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class OrderService {
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static boolean isGold(dto) {
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return dto.id > 1000
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}
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}

‎groovy/src/main/resources/camel/my-route.camel.yaml‎

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- route:
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from:
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uri: file
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parameters:
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directoryName: data
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noop: true
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steps:
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- unmarshal:
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json:
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library: Jackson
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unmarshalType: OrderDTO
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- setVariable:
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name: level
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expression:
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groovy:
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expression: |-
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gold = OrderService.isGold(body)
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return gold ? "Gold" : "Silver"
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- script:
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expression:
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groovy:
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expression: body.level = variable.level
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- log:
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message: ${body}

‎groovy/src/main/resources/log4j2.properties‎

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## ---------------------------------------------------------------------------
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## Licensed to the Apache Software Foundation (ASF) under one or more
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## contributor license agreements. See the NOTICE file distributed with
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## this work for additional information regarding copyright ownership.
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## The ASF licenses this file to You under the Apache License, Version 2.0
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## (the "License"); you may not use this file except in compliance with
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## the License. You may obtain a copy of the License at
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##
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## http://www.apache.org/licenses/LICENSE-2.0
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##
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## Unless required by applicable law or agreed to in writing, software
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## distributed under the License is distributed on an "AS IS" BASIS,
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## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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## See the License for the specific language governing permissions and
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## limitations under the License.
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## ---------------------------------------------------------------------------
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appender.out.type = Console
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appender.out.name = out
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appender.out.layout.type = PatternLayout
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appender.out.layout.pattern = [%30.30t] %-30.30c{1} %-5p %m%n
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rootLogger.level = INFO
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rootLogger.appenderRef.out.ref = out

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