[CAMEL-7582] Python scripts with multiple statements return null

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.13.0
• Fix Version/s: 2.14.0
• Component/s: camel-language
• Estimated Complexity: Unknown
• Assignee: Willem Jiang
• Reporter: Tim Dudgeon
• Created: 05/Jul/14 10:31
• Updated: 23/Jul/14 08:18
• Resolved: 23/Jul/14 08:18

Description

As reported here:
http://camel.465427.n5.nabble.com/Return-Value-from-Python-Script-Not-In-Message-Body-tt5724056.html#none

It seems that when calling python script that has more than a single statement the return value from the script is null. Here is a simple example in groovy that shows this:

package com.im.examples

import org.apache.camel.*
import org.apache.camel.impl.*
import org.apache.camel.builder.*

String script = URLEncoder.encode('"Hello world!"', "UTF-8") // this works - script returns "Hello world!"
//String script = URLEncoder.encode('bar = "baz"; "Hello world!"', "UTF-8") // this fails - script returns null

CamelContext camelContext = new DefaultCamelContext()
camelContext.addRoutes(new RouteBuilder() {
        def void configure() {
            from("direct:python")
            .to("language:python:" + script)
        }
    }
)

camelContext.start()

ProducerTemplate t = camelContext.createProducerTemplate()
def result = t.requestBody('direct:python', 'foo')
println result

camelContext.stop()