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Odi's astoundingly incomplete notes

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How not to design an API

Reading up on how to remotely connect to a JMX port, I wonder how one can possibly design such a horrible API. According to that document you need to create an URI string and pass that to the API. The URI string looks like this:
service:jmx:rmi:///jndi/rmi://hostName:portNum/jmxrmi
Utterly unintuitive, error prone and unreadable. And why assemble an URI string, pass it through an underpowered API and then parse that apart in the implementation again? Like somebody deliberately wanted to piss people off.

It could have been as simple as this:
JMXConnectorFactory.connect(host, port);
Because that's all people normally do! Yes, there may be one person in the Universe that wants to exchange the RMI transport with something else. But the API makes everybody pay with that:
MXServiceURL u = new JMXServiceURL(
  "service:jmx:rmi:///jndi/rmi://" + hostName + ":" + portNum +  "/jmxrmi");
  JMXConnector c = JMXConnectorFactory.connect(u);

posted on 2014-07-14 09:59 CEST in Code | 0 comments | permalink