Question

I am getting a practical issue and the issue can be dascribed as follows.

We are developing a component (Say a plugin) to do some task when an event is triggered within an external CMS using the API provided by them. They have provided some jar libraries, So what we are doing is implementing an Interface provided by them. Then an internal method is called when an event is triggered. (The CMS is creating only one instance of class when the first event triggers, then it just executes the method with each event trigger)

The function can be summarized as follows,

import com.external.ProvidedInterface;


public class MonitorProgram implements ProvidedInterface{

   public void process(){
      //This method is called when an event is triggered in CMS
   }

}

Within our class we are using “javax.net.ssl.HttpsURLConnection” (JAVA 1.5). But HttpsURLConnection migrated to javax.net.ssl from com.sun.net.ssl for 1.4. But it seems the CMS I am referring to (We dont know their implementation actually) uses something like this

System.setProperty("java.protocol.handler.pkgs","com.sun.net.ssl.internal.www.protocol");

leading to a ClassCastException in our code.

I think my question is clear. In our case we cant set VM parameters,

-Djava.protocol.handler.pkgs=

Also we cant set it back using,

System.setProperty("")

because the VM instance is same for CMS and our program.

What can I do for get this problem resolved? And idea or experiences?

Answer 1

This is not clear for me.

Do you want to overwrite a system property?
You can do this.

Overwrite the System.property before calling the external library method and when the method returns you can set the old System.property back

    final String propertyName = "Property";
    String oldProperty = System.getProperty(propertyName);
    System.setProperty(propertyName,"NEW_VALUE");
    monitorProgram.process();
    System.setProperty(propertyName,oldProperty);

Or do you want to prevent, that the called process overwrites the system.property?
And why you can not set the system property by hand?