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new 7099e66f CAMEL-22214: camel-groovy - Allow to pre-load groovy source
files for shared functions and DTOs
7099e66f is described below
commit 7099e66fc178bad2b98f2e6156ed2ec25fda9a09
Author: Claus Ibsen <[email protected]>
AuthorDate: Mon Jul 14 16:57:32 2025 +0200
CAMEL-22214: camel-groovy - Allow to pre-load groovy source files for
shared functions and DTOs
---
README.adoc | 4 +-
main-groovy/README.adoc | 55 ++++++++
main-groovy/data/order.json | 4 +
main-groovy/pom.xml | 139 +++++++++++++++++++++
.../org/apache/camel/example/MyApplication.java | 33 +++++
.../main/resources/camel-groovy/OrderDTO.groovy | 10 ++
.../resources/camel-groovy/OrderService.groovy | 5 +
.../src/main/resources/camel/my-route.camel.yaml | 24 ++++
main-groovy/src/main/resources/log4j2.properties | 23 ++++
9 files changed, 296 insertions(+), 1 deletion(-)
diff --git a/README.adoc b/README.adoc
index 8e2826c4..bc1af871 100644
--- a/README.adoc
+++ b/README.adoc
@@ -28,7 +28,7 @@ readme's instructions.
== Examples
// examples: START
-Number of Examples: 72 (0 deprecated)
+Number of Examples: 73 (0 deprecated)
[width="100%",cols="4,2,4",options="header"]
|===
@@ -70,6 +70,8 @@ Number of Examples: 72 (0 deprecated)
| link:main-endpointdsl/README.adoc[Main Endpointdsl] (main-endpointdsl) |
Camel Standalone | An example for showing standalone Camel with Endpoint DSL
+| link:main-groovy/README.adoc[Main Groovy] (main-groovy) | Camel Standalone |
An example for showing standalone Camel using YAML with Groovy scripts
+
| link:main-joor/README.adoc[Main Joor] (main-joor) | Camel Standalone | An
example for showing standalone Camel with jOOR runtime Java compiled
| link:main-lambda/README.adoc[Main Lambda] (main-lambda) | Camel Standalone |
Camel routes lambda style
diff --git a/main-groovy/README.adoc b/main-groovy/README.adoc
new file mode 100644
index 00000000..c5939869
--- /dev/null
+++ b/main-groovy/README.adoc
@@ -0,0 +1,55 @@
+== Camel Example Main Groovy
+
+This example shows how to run Camel standalone (YAML routes) with Groovy
scripts
+for small functions and DTO classes.
+
+The Groovy source is located in `src/main/resources/camel-groovy`, which
+are pre-compiled on startup.
+
+This allows Camel routes to use the Groovy classes (as if they were Java
classes).
+The route will then transform a JSon file into a DTO class using Jackson, and
then
+enrich the DTO based on some business logic that are inlined Groovy script in
the Camel route.
+
+=== Build
+
+First compile the example by executing:
+
+[source,sh]
+----
+$ mvn compile
+----
+
+=== How to run
+
+You can run this example using
+
+[source,sh]
+----
+$ mvn camel:run
+----
+
+=== How to configure for Camel Textual Route debugging
+
+Several IDEs are providing support for Camel Textual Route debugging. To
enable this possibility, you need to launch this example with the profile
`camel.debug`.
+
+[source,sh]
+----
+$ mvn camel:run -Pcamel.debug
+----
+
+This profile can also be activated with camel.debug property set to true. For
instance, by setting the property from command-line:
+
+[source,sh]
+----
+$ mvn camel:run -Dcamel.debug=true
+----
+
+=== Help and contributions
+
+If you hit any problem using Camel or have some feedback, then please
+https://camel.apache.org/community/support/[let us know].
+
+We also love contributors, so
+https://camel.apache.org/community/contributing/[get involved] :-)
+
+The Camel riders!
diff --git a/main-groovy/data/order.json b/main-groovy/data/order.json
new file mode 100644
index 00000000..c66544bb
--- /dev/null
+++ b/main-groovy/data/order.json
@@ -0,0 +1,4 @@
+{
+ "id": 432,
+ "name": "Acme"
+}
\ No newline at end of file
diff --git a/main-groovy/pom.xml b/main-groovy/pom.xml
new file mode 100644
index 00000000..b7a547ed
--- /dev/null
+++ b/main-groovy/pom.xml
@@ -0,0 +1,139 @@
+<?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.example</groupId>
+ <artifactId>camel-examples</artifactId>
+ <version>4.14.0-SNAPSHOT</version>
+ </parent>
+
+ <artifactId>camel-example-main-groovy</artifactId>
+ <packaging>jar</packaging>
+ <name>Camel :: Example :: Main :: Groovy</name>
+ <description>An example for showing standalone Camel using YAML with
Groovy scripts</description>
+
+ <properties>
+ <category>Camel Standalone</category>
+ </properties>
+
+ <dependencyManagement>
+ <dependencies>
+ <!-- Add Camel BOM -->
+ <dependency>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-bom</artifactId>
+ <version>${camel.version}</version>
+ <type>pom</type>
+ <scope>import</scope>
+ </dependency>
+ </dependencies>
+ </dependencyManagement>
+
+ <dependencies>
+
+ <!-- use camel-main to bootstrap camel -->
+ <dependency>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-main</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-yaml-dsl</artifactId>
+ </dependency>
+
+ <!-- and we use these components -->
+ <dependency>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-groovy</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-file</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-jackson</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-log</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-timer</artifactId>
+ </dependency>
+
+ <!-- logging -->
+ <dependency>
+ <groupId>org.apache.logging.log4j</groupId>
+ <artifactId>log4j-core</artifactId>
+ <version>${log4j2-version}</version>
+ <scope>runtime</scope>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.logging.log4j</groupId>
+ <artifactId>log4j-slf4j2-impl</artifactId>
+ <version>${log4j2-version}</version>
+ <scope>runtime</scope>
+ </dependency>
+ <!-- for testing -->
+ <dependency>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-test-main-junit5</artifactId>
+ <scope>test</scope>
+ </dependency>
+ </dependencies>
+
+ <build>
+ <plugins>
+ <plugin>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-maven-plugin</artifactId>
+ <version>${camel.version}</version>
+ <configuration>
+ <!-- use built-in logging, instead of logback -->
+ <logLevel>INFO</logLevel>
+
<mainClass>org.apache.camel.example.MyApplication</mainClass>
+ </configuration>
+ </plugin>
+ </plugins>
+ </build>
+
+ <profiles>
+ <profile>
+ <id>camel.debug</id>
+ <activation>
+ <property>
+ <name>camel.debug</name>
+ <value>true</value>
+ </property>
+ </activation>
+ <dependencies>
+ <dependency>
+ <groupId>org.apache.camel</groupId>
+ <artifactId>camel-debug</artifactId>
+ </dependency>
+ </dependencies>
+ </profile>
+ </profiles>
+</project>
diff --git
a/main-groovy/src/main/java/org/apache/camel/example/MyApplication.java
b/main-groovy/src/main/java/org/apache/camel/example/MyApplication.java
new file mode 100644
index 00000000..28cdcddf
--- /dev/null
+++ b/main-groovy/src/main/java/org/apache/camel/example/MyApplication.java
@@ -0,0 +1,33 @@
+/*
+ * 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.
+ */
+package org.apache.camel.example;
+
+import org.apache.camel.main.Main;
+
+/**
+ * Main class that boot the Camel application
+ */
+public class MyApplication {
+
+ public static void main(String[] args) throws Exception {
+ // use Camels Main class
+ Main main = new Main(MyApplication.class);
+ // now keep the application running until the JVM is terminated (ctrl
+ c or sigterm)
+ main.run(args);
+ }
+
+}
diff --git a/main-groovy/src/main/resources/camel-groovy/OrderDTO.groovy
b/main-groovy/src/main/resources/camel-groovy/OrderDTO.groovy
new file mode 100644
index 00000000..a3a371ed
--- /dev/null
+++ b/main-groovy/src/main/resources/camel-groovy/OrderDTO.groovy
@@ -0,0 +1,10 @@
+class OrderDTO {
+
+ int id
+ String name
+ String level;
+
+ String toString() {
+ return "Order " + id + " from " + name + " (" + level + ")"
+ }
+}
diff --git a/main-groovy/src/main/resources/camel-groovy/OrderService.groovy
b/main-groovy/src/main/resources/camel-groovy/OrderService.groovy
new file mode 100644
index 00000000..7eed31a4
--- /dev/null
+++ b/main-groovy/src/main/resources/camel-groovy/OrderService.groovy
@@ -0,0 +1,5 @@
+class OrderService {
+ static boolean isGold(dto) {
+ return dto.id > 1000
+ }
+}
diff --git a/main-groovy/src/main/resources/camel/my-route.camel.yaml
b/main-groovy/src/main/resources/camel/my-route.camel.yaml
new file mode 100644
index 00000000..42d7a914
--- /dev/null
+++ b/main-groovy/src/main/resources/camel/my-route.camel.yaml
@@ -0,0 +1,24 @@
+- route:
+ from:
+ uri: file
+ parameters:
+ directoryName: data
+ noop: true
+ steps:
+ - unmarshal:
+ json:
+ library: Jackson
+ unmarshalType: OrderDTO
+ - setVariable:
+ name: level
+ expression:
+ groovy:
+ expression: |-
+ gold = OrderService.isGold(body)
+ return gold ? "Gold" : "Silver"
+ - script:
+ expression:
+ groovy:
+ expression: body.level = variable.level
+ - log:
+ message: ${body}
diff --git a/main-groovy/src/main/resources/log4j2.properties
b/main-groovy/src/main/resources/log4j2.properties
new file mode 100644
index 00000000..d9f0508a
--- /dev/null
+++ b/main-groovy/src/main/resources/log4j2.properties
@@ -0,0 +1,23 @@
+## ---------------------------------------------------------------------------
+## 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.
+## ---------------------------------------------------------------------------
+
+appender.out.type = Console
+appender.out.name = out
+appender.out.layout.type = PatternLayout
+appender.out.layout.pattern = [%30.30t] %-30.30c{1} %-5p %m%n
+rootLogger.level = INFO
+rootLogger.appenderRef.out.ref = out
