It can also find properties as well. If you specify a property file name loaded via CLASSPATH, it will retrieve the value. The Class Check can find the property file too, but only names with the suffix ".properties", otherwise it treats it as a class.
I use this for debugging web environments.
Let me know if you have any questions.
Best Wishes, Dave
David Thielen wrote:
I will pass this on. However, what seems real strange is they cannot find dom4j in any of the jar files used in their system.
Is there a program somewhere which can walk the list of all jars loaded and see all locations of a given class? I'm guessing this would be hard to do in an application server as it does not use the classpath.
??? - thanks - dave
--
+------------------------------------------------------------+ | David Lucas mailto: ddlucas @ lse.com | | Lucas Software Engineering, Inc. (740) 964-6248 Voice | | Unix,Java,C++,CORBA,XML,EJB (614) 668-4020 Mobile | | Middleware,Frameworks (888) 866-4728 Fax/Msg | +------------------------------------------------------------+ | GPS Location: 40.0150 deg Lat, -82.6378 deg Long | | IMHC: "Jesus Christ is the way, the truth, and the life." | | IMHC: "I know where I am; I know where I'm going." <>< | +------------------------------------------------------------+
Notes: PGP Key Block=http://www.lse.com/~ddlucas/pgpblock.txt IMHO="in my humble opinion" IMHC="in my humble conviction" All trademarks above are those of their respective owners.
<%@ page import="java.net.URL,
java.util.Properties,
java.io.InputStream"
%>
<%@ page contentType="text/html;charset=iso-8859-1"%>
<jsp:useBean id='retrieveParms' class='java.util.HashMap' scope='session'/>
<%
int columns=60;
String checkClassName=(String)retrieveParms.get("className");
String checkClassLocation=(String)retrieveParms.get("classLocation");
if (checkClassName==null) {
checkClassName="";
retrieveParms.put("className",checkClassName);
}
if (checkClassLocation==null || checkClassName.length()==0) {
checkClassLocation="";
retrieveParms.put("classLocation",checkClassLocation);
}
String checkPropertyName=(String)retrieveParms.get("propertyName");
String checkPropertyFile=(String)retrieveParms.get("propertyFile");
String checkPropertyValue=(String)retrieveParms.get("propertyValue");
if (checkPropertyName==null) {
checkPropertyName="";
retrieveParms.put("propertyName",checkPropertyName);
}
if (checkPropertyFile==null) {
checkPropertyFile="";
retrieveParms.put("propertyFile",checkPropertyFile);
}
if (checkPropertyValue==null|| checkPropertyName.length()==0) {
checkPropertyValue="";
retrieveParms.put("propertyValue",checkPropertyValue);
}
%>
<html>
<head>
<title>
Check Class Location
</title>
<META http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<META http-equiv="Content-Style-Type" content="text/css">
</head>
<body>
<FORM NAME="Class" ACTION="<%=response.encodeURL("CheckClass.jsp")%>"
METHOD="post">
<P>Enter fully qualified class to look up.</P>
<TABLE>
<TR VALIGN=TOP ALIGN=LEFT>
<TD><B><I>Class Name:</I></B></TD>
<TD><INPUT TYPE="text" SIZE="<%=columns%>" MAXLENGTH="256" NAME="ClassName"
VALUE='<%=
(String)retrieveParms.get("className")
%>' /><BR></TD>
</TR>
<TR VALIGN=TOP ALIGN=LEFT>
<TD><B><I>Location:</I></B></TD>
<TD><TEXTAREA TYPE="textarea" ROWS="10" COLS="<%=columns%>"
NAME="ClassLocation" READONLY="true" >
<%=(String)retrieveParms.get("classLocation")%>
</TEXTAREA><BR></TD>
</TR>
<TR VALIGN=TOP ALIGN=CENTER>
<TD><INPUT TYPE="SUBMIT" NAME="CheckClass" VALUE="CheckClass" /></TD>
</TR>
</TABLE>
</FORM>
<br/>
<HR/>
<br/>
<P>Enter property name ( and property file if loaded from classpath) to get
value.</P>
<FORM>
<TABLE>
<TR VALIGN=TOP ALIGN=LEFT>
<TD><B><I>Property Name:</I></B></TD>
<TD><INPUT TYPE="text" SIZE="<%=columns%>" MAXLENGTH="256" NAME="PropertyName"
VALUE='<%=
(String)retrieveParms.get("propertyName")
%>' /><BR></TD>
</TR>
<TR VALIGN=TOP ALIGN=LEFT>
<TD><B><I>Property File:</I></B></TD>
<TD><INPUT TYPE="text" SIZE="<%=columns%>" MAXLENGTH="256" NAME="PropertyFile"
VALUE='<%=
(String)retrieveParms.get("propertyFile")
%>' /><BR></TD>
</TR>
<TR VALIGN=TOP ALIGN=LEFT>
<TD><B><I>Value:</I></B></TD>
<TD><TEXTAREA TYPE="textarea" ROWS="2" COLS="<%=columns%>" NAME="PropertyValue"
READONLY="true" >
<%=(String)retrieveParms.get("propertyValue")%>
</TEXTAREA><BR></TD>
</TR>
<TR VALIGN=TOP ALIGN=CENTER>
<TD><INPUT TYPE="SUBMIT" NAME="GetProperty" VALUE="GetProperty" /></TD>
</TR>
</TABLE>
</FORM>
<HR/>
<%
int rc=200;
String redirect=null;
String submit=request.getParameter("CheckClass");
if (submit==null) submit=request.getParameter("GetProperty");
if (submit==null) submit="";
if ( "CheckClass".equals(submit)) {
String className = request.getParameter("ClassName");
String classLocation = request.getParameter("ClassLocation");
out.println("<br/><p>Checking for class "+className+" ...</p>");
retrieveParms.put("className",className);
retrieveParms.put("classLocation","");
try{
String search;
if (className.indexOf(".properties")==-1) {
search ="/"+className.replace('.','/')+".class";
}
else {
search=className;
}
URL url;
url = search.getClass().getResource(search);
if (url==null) {
url=Thread.currentThread().getContextClassLoader().getResource(search);
}
if (url==null) {
Class c;
try {
c =
Thread.currentThread().getContextClassLoader().loadClass(className);
url = c.getResource(search);
}
catch(Exception ignore) {}
}
if (url==null) {
ClassLoader
cl=Thread.currentThread().getContextClassLoader().getParent();
if (cl!=null) {
url = cl.getResource(search);
}
}
out.println("<br/><p>found under "+url+" ...</p>");
if (url!=null) {
classLocation=url.getPath();
}
else {
classLocation="NOT FOUND
!\n\nclasspath=\n"+System.getProperty("java.class.path")+
"\n\nbootclasspath=\n"+System.getProperty("sun.boot.class.path");
String pathSeparator=System.getProperty("path.separator");
classLocation=classLocation+"\n\nenv=\n"+System.getProperties().toString().replace(',','\n');
classLocation=classLocation.replaceAll(pathSeparator,pathSeparator+"\n") ;
}
retrieveParms.put("classLocation",classLocation);
//now clear bottom by refresh
redirect=response.encodeRedirectURL("CheckClass.jsp");
}
catch(Exception e) {
rc=500;
e.printStackTrace();
out.println("<br/>Error trying to find class:
"+e.getMessage()+"<br/>");
out.println("<br/>"+e+"<br/>");
}
}
else if ("GetProperty".equals(submit)) {
try{
String propertyName = request.getParameter("PropertyName");
String propertyFile = request.getParameter("PropertyFile");
String propertyValue = request.getParameter("PropertyValue");
out.println("<br/><p>Checking for property "+propertyName+" ...</p>");
retrieveParms.put("propertyFile",propertyFile);
retrieveParms.put("propertyValue","");
retrieveParms.put("propertyName",propertyName);
propertyValue=null;
Properties props=System.getProperties();
if (propertyFile.length()>0) {
String search="/"+propertyFile;
URL url;
url = search.getClass().getResource(search);
if (url==null) {
url=Thread.currentThread().getContextClassLoader().getResource(search);
}
if (url==null) {
ClassLoader
cl=Thread.currentThread().getContextClassLoader().getParent();
if (cl!=null) {
url = cl.getResource(search);
}
}
out.println("<br/><p>found under "+url+" ...</p>");
if (url!=null) {
props=new Properties();
InputStream is=null;
String error=null;
try {
props.clear();
is = url.openStream();
props.load(is);
}
catch(Exception e){
error=""+e;
out.println("<br/><p>"+error+"</p><br/>");
propertyValue=" ### ERROR loading property file
"+propertyFile+" from classpath!\n"+error;
}
finally{
if (is!=null) {
is.close();
}
}
}
}
//find the value
if (propertyValue==null) {
propertyValue=props.getProperty(propertyName);
if (propertyValue==null) {
propertyValue=" ### no property defined ";
}
}
out.println("<br/><p>propertyValue="+propertyValue+"</p><br/>");
out.println("<br/><p>requestParms="+retrieveParms+"</p><br/>");
retrieveParms.put("propertyValue",propertyValue);
//now clear bottom by refresh
redirect=response.encodeRedirectURL("CheckClass.jsp");
}
catch(Exception e) {
rc=500;
e.printStackTrace();
out.println("<br/>Error trying to find class:
"+e.getMessage()+"<br/>");
out.println("<br/>"+e+"<br/>");
}
}
response.setStatus(rc);
if (redirect!=null) {
response.sendRedirect(redirect);
}
%>
<br/>
<p/><p/>
This simple utility provided AS IS from <a href="http://www.lse.com";>Lucas
Software Engineering, Inc.</a>, Copyright 2005<br/>
No WARRANTIES, expressed or implied.<br/>
</body>
</html>
