I have been working with WebLogic Server since 1999 when it was still a BEA Systems product. Though professionally I would characterize myself as an architect/developer, I have been working with WebLogic administrators for more than a decade. In fact, at BEA Systems I was the author of the original BEA WebLogic Administrator Certification exam. As a WebLogic consultant, the primary tools that I use with clients are the WebLogic Scripting Tool (WLST) and the WebLogic Diagnostic Framework (WLDF).
WLST is based on Jython, the all-Java version of Python. Since Jython runs in the JVM it is possible to invoke WLST commands directly form Java code. The possibilities are endless, you could use a Swing Gui front end and a WLST back end to provide automated management and monitoring for WebLogic.
Here is a simple example of WLST commands invoked from Java code. This code example uses a Runtime MBean to check how long the server has been running.
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import java.io.IOException; import java.io.OutputStream; // from weblogic.jar import org.python.core.PyLong; import org.python.util.InteractiveInterpreter; import weblogic.management.scripting.utils.WLSTInterpreter; public class WSTLClient { public static void main(String[] args) { InteractiveInterpreter interpreter = new WLSTInterpreter(); // WLST output to dev/null interpreter.setOut(new NullOutputStream()); // Run commands no results interpreter.exec("connect('user','password','t3://host:port')"); interpreter.exec("serverRuntime()"); // Run command with result PyLong result = (PyLong)interpreter.eval("cmo.getActivationTime()"); // calculate uptime long startTime = result.getValue().longValue(); long currentTime = System.currentTimeMillis(); long uptimeMilli = currentTime - startTime; long uptimeMins = (uptimeMilli / 1000L) / 60L; System.out.println( "Server Uptime: " + uptimeMins + "min"); } // custom class to iplement noop output stream public static class NullOutputStream extends OutputStream { @Override public void write(int b) throws IOException {} @Override public void write(byte[] b) throws IOException {} @Override public void write(byte[] b, int off, int len) throws IOException { } } } |
WLST documentation can be found here. Feel free to use this code as the basis for your own scripts.
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