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Welcome to my blog, which was once a mailing list of the same name and is still generated by mail. Please reply via the "comment" links.

Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

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Lepl parser for Python.

Colorless Green.

Photography around Santiago.

SVG experiment.

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Calibration of seismometers.

Data access via web services.

Cache rewrite.

Extending OpenSSH.

C-ORM: docs, API.

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© 2006-2015 Andrew Cooke (site) / post authors (content).

Useful Mule Hack

From: "andrew cooke" <andrew@...>

Date: Sun, 5 Mar 2006 13:58:50 -0300 (CLST)

Here's a useful hack for the Mule ESB.  The HTTP/REST receiver is "too
integrated" in that it generates a UMOMessage whose properties are the
post parameters.  Which is a huge security hole, but, more urgently, means
that simple components cannot access the values.

This gets the "foo" parameter and returns it as a String payload:

  import org.mule.umo.UMOEventContext;
  import org.mule.umo.UMOMessage;
  import org.mule.umo.lifecycle.Callable;

  public class UglyHack implements Callable {

    public Object onCall(UMOEventContext context) {
        UMOMessage message = context.getMessage();
        String[] foos = (String[])message.getProperty("foo");
        return foos[0];


Warning - May Confuse Mule

From: "andrew cooke" <andrew@...>

Date: Tue, 7 Mar 2006 11:04:40 -0300 (CLST)

After using the above we had to insert a repeating isolator -
http://www.ctio.noao.edu/~andrew/mule-patterns/Isolating-Repeater.html -
immediately after the transformation described in the messaging chain. 
However, it was a rather complex chain (mixing synchronous and
asynchronous messaging), and it's not clear exactly what the problem was.

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