[CAMEL-17516] Environment variables takes precedence over route template parameter

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 3.11.1, 3.11.5
• Fix Version/s: 3.14.0
• Component/s: came-core

Environment

Windows 10
Java 8.0.282

• Estimated Complexity: Unknown

Language

java

• Assignee: Unassigned
• Reporter: Stefano Rocca
• Created: 19/Jan/22 18:34
• Updated: 19/Jan/22 19:41
• Resolved: 19/Jan/22 19:41

Description

While setting up a route template, if you use a parameter named like an environment variable, camel resolves first the environment variable and ignores the value of the parameter set using the TemplateRouteBuilder.

Here follows a short program that exhibit this behaviour (this code is also attached to this issue as "sample_code.txt")

import org.apache.camel.CamelContext;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.builder.TemplatedRouteBuilder;
import org.apache.camel.main.ConfigureRouteTemplates;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Main {
    
    public static final Logger LOG = LoggerFactory.getLogger(Main.class);
    
    public static class MyRouteBuilder extends RouteBuilder {
        
        public void configure() throws Exception {
            routeTemplate("myTemplate")
                .templateParameter("name")
                .templateParameter("path")
                .templateParameter("myPeriod", "3s")
                .from("timer:{{name}}?period={{myPeriod}}")
                    .log("{{path}}");
        }
    }

    public static class MyTemplateBuilder implements ConfigureRouteTemplates {
        public void configure(CamelContext context)

{             TemplatedRouteBuilder.builder(context, "myTemplate")                 .parameter("name", "one")                 .parameter("path", "test path")             .add();         }

    }
    public static void main(String[] args) throws Exception

{         org.apache.camel.main.Main m = new org.apache.camel.main.Main();         m.configure().addRoutesBuilder(MyRouteBuilder.class);         m.bind("myTemplateBuilder", new MyTemplateBuilder());         m.run(args);     }

}

This sample code, when run with Camell 3.11.1 or 3.11.5, outputs the content of the PATH variable.
If you run it with Camel 3.14.0, it outputs "test path".

Issue Links

• duplicates: CAMEL-16788 camel-kamelet - Local parameters get overridden by environment variable