/********************************************************************************
* CruiseControl, a Continuous Integration Toolkit
* Copyright (c) 2003, ThoughtWorks, Inc.
* 200 E. Randolph, 25th Floor
* Chicago, IL 60601 USA
* All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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package net.sourceforge.cruisecontrol.taglib;
import java.net.MalformedURLException;
import java.net.URL;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.Tag;
import net.sourceforge.cruisecontrol.util.ServerNameSingleton;
/**
* Extracts the base JMX HTTP URL from System properties and application context.
* @author <a href="mailto:hak@2mba.dk">Hack Kampbjorn</a>
*/
public class JmxBaseTag extends CruiseControlTagSupport {
private static final String JMX_HOST = "cruisecontrol.jmxhost";
static final String JMX_PORT = "cruisecontrol.jmxport";
private static final String DEFAULT_JMX_HOST = "localhost";
private static final String DEFAULT_JMX_PATH = "/";
static final int DEFAULT_JMX_PORT = 8000;
public int doStartTag() throws JspException {
URL jmxBase;
try {
jmxBase = createJmxUrl();
} catch (MalformedURLException muex) {
try {
jmxBase = new URL("http", DEFAULT_JMX_HOST, DEFAULT_JMX_PORT, DEFAULT_JMX_PATH);
} catch (MalformedURLException e2) {
throw new AssertionError(e2);
}
}
getPageContext().setAttribute(getId(), jmxBase);
return Tag.SKIP_BODY;
}
private String getParameter(String param) {
String value = System.getProperty(param);
if (value == null) {
value = getContextParam(param);
}
return value;
}
URL createJmxUrl() throws JspException, MalformedURLException {
String jmxHost = getParameter(JMX_HOST);
if (jmxHost == null) {
jmxHost = ServerNameSingleton.getServerName();
}
String jmxPortNumber = getParameter(JMX_PORT);
int jmxPort;
if (jmxPortNumber == null) {
jmxPort = DEFAULT_JMX_PORT;
} else {
try {
jmxPort = Integer.parseInt(jmxPortNumber);
} catch (NumberFormatException e) {
debug("Error parsing jmxPortNumber: " + jmxPortNumber, e);
jmxPort = DEFAULT_JMX_PORT;
debug("Using default jmx port: " + jmxPort);
}
}
return new URL("http", jmxHost, jmxPort, DEFAULT_JMX_PATH);
}
}