How to read script from a file ?

[labo32_delaboe]

Hello,

I have a route where I want to read a groovy script from a file.

from("quartz://timerName?cron=0/5 * * * * ?")
            .bean(groovy("file://test.txt"))
            .to("log:ExampleRouter");  

fails with

org.springframework.beans.factory.BeanCreationException: Error creating bean wit
h name 'camel-1': Invocation of init method failed; nested exception is org.code
haus.groovy.control.MultipleCompilationErrorsException: startup failed:<|script1
3198099994491557003854.groovy: 1: unexpected token:  @ line 1, column 16.<|   fi
le://test.txt<|                  ^<|<|1 error<|

How can I read a script from a file ?

Thanks

labo

[davsclaus]

Hi

This is currently not supported directly, something which we should possible add. I think this has been asked before in the Camel user list.

What you can do is to use the language component and provide the script as a header which is the file.

http://camel.apache.org/language

First set a header with the file name

.setHeader("CamelLanguageScript", new File("test.txt"))

And then call the language component

.to("language:groovy")

.to("log:xxx")

[labo32_delaboe]

Hi,

thanks for the response but

.setHeader("CamelLanguageScript", new File("test.txt"))

is not possible with my camel 2.8.2 route.

Code like

.....
InputStream in = getContext().getApplicationContextClassLoader().getResourceAsStream("/test.txt");
          from("quartz://TimerGroup/matchUpdateTimer?cron=0/5 * * * * ?")               .setHeader("CamelLanguageScript",constant(convertStreamToString(in)))
               .to("language:groovy")
               .to("log:################### QUARTZ-log");
......
...


 public String convertStreamToString(InputStream is) {

        try {
               if (is != null) {
                   Writer writer = new StringWriter();

                   char[] buffer = new char[1024];
                   try {
                       Reader reader = new BufferedReader(
                               new InputStreamReader(is, "UTF-8"));
                       int n;
                       while ((n = reader.read(buffer)) != -1) {
                           writer.write(buffer, 0, n);
                       }
                   } finally {
                       is.close();
                   }
                   return writer.toString();
               } else {        
                   return "";
               }
          } catch (UnsupportedEncodingException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
               return "";
          } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
               return "";
          }

works fine but I think this is not the most elegant way.....

Can I use the file component after the quartz trigger and load the file which is located in my war file ?

Greetz

labo

[davsclaus]

Ah the file is in the WAR file?

Then you need to load it from the classpath. Which is a bit more tricky. The language component in Camel doesn't support this, but we could add support for that.

I will create a ticket.

There is a API on CamelContext to load resources from the classpath, eg ClassResolver on CamelContext.

[davsclaus]

The ticket is http://fusesource.com/issues/browse/MR-542

[labo32_delaboe]

That's the way I do it at the moment.

Thanks a lot

labo