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new 3849e69 CAMEL-14963: Route Template example.
3849e69 is described below
commit 3849e696aca2840ec5c297d715ee99421961585b
Author: Claus Ibsen <claus.ib...@gmail.com>
AuthorDate: Thu Jul 2 19:05:52 2020 +0200
CAMEL-14963: Route Template example.
---
examples/camel-example-routetemplate/readme.adoc | 8 +++++-
.../org/apache/camel/example/MyApplication.java | 4 +--
.../{MyMainListener.java => MyConfiguration.java} | 33 +++++++++++++---------
.../org/apache/camel/example/MyRouteTemplates.java | 10 +++++++
4 files changed, 38 insertions(+), 17 deletions(-)
diff --git a/examples/camel-example-routetemplate/readme.adoc
b/examples/camel-example-routetemplate/readme.adoc
index 4aa2f92..3cb8476 100644
--- a/examples/camel-example-routetemplate/readme.adoc
+++ b/examples/camel-example-routetemplate/readme.adoc
@@ -1,6 +1,12 @@
== Camel Example Route Template
-TODO: Update
+This examples shows how to use Route Templates (parameterized routes) to
specify a skeleton route
+which can be used for creating and adding new routes via parameters.
+
+The route template is defined via Java or XML DSL (RouteBuilder) in the
`MyRouteTemplates.java` source file.
+The `MyConfiguration.java` is used to create two routes from the template
using different set of parameters.
+
+The example runs standalone via Camel Main in the `MyApplication.java` source
file.
=== How to run
diff --git
a/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyApplication.java
b/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyApplication.java
index d39aad9..955b0a2 100644
---
a/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyApplication.java
+++
b/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyApplication.java
@@ -29,10 +29,10 @@ public final class MyApplication {
public static void main(String[] args) throws Exception {
// use Camels Main class
Main main = new Main();
- // add listener that create routes from the template
- main.addMainListener(new MyMainListener());
// and add route templates via routes builder
main.configure().addRoutesBuilder(MyRouteTemplates.class);
+ // add configuration class which setup the routes from the route
templates
+ main.configure().addConfigurationClass(MyConfiguration.class);
// now keep the application running until the JVM is terminated (ctrl
+ c or sigterm)
main.run(args);
}
diff --git
a/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyMainListener.java
b/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyConfiguration.java
similarity index 52%
rename from
examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyMainListener.java
rename to
examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyConfiguration.java
index 959b234..a3aa603 100644
---
a/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyMainListener.java
+++
b/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyConfiguration.java
@@ -16,23 +16,28 @@
*/
package org.apache.camel.example;
-import org.apache.camel.main.BaseMainSupport;
-import org.apache.camel.main.MainListenerSupport;
+import org.apache.camel.CamelContext;
-public class MyMainListener extends MainListenerSupport {
+public class MyConfiguration {
- @Override
- public void beforeStart(BaseMainSupport main) {
+ /**
+ * Configure and adds routes from route templates.
+ *
+ * The method name <tt>configureRouteTemplates</tt> is detected from
camel-main
+ * and invoked after routes and route templates has been loaded which
allows
+ * to create and add routes from the route templates during bootstrap
+ */
+ public void configureRouteTemplates(CamelContext context) {
// create two routes from the template
- main.getCamelContext().addRouteFromTemplate("myTemplate")
- .parameter("name", "one")
- .parameter("greeting", "Hello")
- .build();
+ context.addRouteFromTemplate("myTemplate")
+ .parameter("name", "one")
+ .parameter("greeting", "Hello")
+ .build();
- main.getCamelContext().addRouteFromTemplate("myTemplate")
- .parameter("name", "two")
- .parameter("greeting", "Bonjour")
- .parameter("myPeriod", "5s")
- .build();
+ context.addRouteFromTemplate("myTemplate")
+ .parameter("name", "two")
+ .parameter("greeting", "Bonjour")
+ .parameter("myPeriod", "5s")
+ .build();
}
}
diff --git
a/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyRouteTemplates.java
b/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyRouteTemplates.java
index 79cba25..6040577 100644
---
a/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyRouteTemplates.java
+++
b/examples/camel-example-routetemplate/src/main/java/org/apache/camel/example/MyRouteTemplates.java
@@ -18,14 +18,24 @@ package org.apache.camel.example;
import org.apache.camel.builder.RouteBuilder;
+/**
+ * Route templates using {@link RouteBuilder} which allows
+ * us to define a number of templates (parameterized routes)
+ * which we can create routes from.
+ */
public class MyRouteTemplates extends RouteBuilder {
@Override
public void configure() throws Exception {
+ // create a route template with the given name
routeTemplate("myTemplate")
+ // here we define the required input parameters (can have default
values)
.templateParameter("name")
.templateParameter("greeting")
.templateParameter("myPeriod", "3s")
+ // here comes the route in the template
+ // notice how we use {{name}} to refer to the template parameters
+ // we can also use {{propertyName}} to refer to property
placeholders
.from("timer:{{name}}?period={{myPeriod}}")
.setBody(simple("{{greeting}} ${body}"))
.log("${body}");
