Hi Celeste,
I wanted to test out the runtime feature, so I set out to test it on
Tomcat 4b6, win 2000 server.
I created a bat file called hello.bat that simply echoed hello into a
hello.txt file. I dont have the printer LWPPrint, and I dont know how
to print from dos command prompt.
The code is very similar to yours, except that I have put the Print
method inside a main Utils class, and packaged it due to my environemnt
setup. The other difference is that the hello.bat file returns very
quickly, and I do not know how to put a timer in the DOS batch files in
order to test the wait feature. The other difference is since I dont
have the writer.* log feature, I simply used e.printStackTrace methods
instead.
It seems to work fine. Below is the code:
************** Start Utils.java
package andrewbruno;
import java.io.*;
public class Utils {
public int Print() {
Runtime rt = Runtime.getRuntime();
Process proc;
try {
proc = rt.exec("F:\\myWork\\bin\\hello.bat");
} catch (IOException e) {
e.printStackTrace();
//("--* exec failed: error " + e.getMessage());
return (-1);
}
int exitStatus = -1000000;
do {
try {
exitStatus = proc.waitFor();
} catch (InterruptedException e) {
//writer.writeDebug("wait interrupted "
+ e.getMessage());
e.printStackTrace();
}
} while (exitStatus == -1000000);
return (exitStatus);
}//end Print
}//end Utils
************** End Utils.java
************** Start JSP file
<jsp:useBean id="test" scope="session" class="andrewbruno.Utils"/>
<%
int yes = test.Print();
if ( yes == (-1) ) { %>
<H1> Error occurred trying to execute LMWPrint</H1>
<%} else %>
<h1>Automation of LMWPrint completed</h1>
************** End JSP file
I am happy to expand on the above if you'd like me to test any thing
else.
Thanks for your code example ;)
:ab
-----Original Message-----
From: Haseltine, Celeste [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, 29 August 2001 9:21 AM
To: [EMAIL PROTECTED]
Subject: Error: JSP Page threw a non-Exception Throwable????
Has anyone every experienced the following exception from a JSP:
Exception javax.servlet.ServletException: JSP Page threw a non-Exception
Throwable.
I am trying to access a method in a Java class bean called Print from
within
my JSP. The Print method resides in a Java class bean (non-visual) that
contains the following code :
public int Print()
{
Runtime rt = Runtime.getRuntime();
Process proc;
try {
proc = rt.exec("LMWPrint /L=C:\\Program
Files\\lmw3\\LabelFiles\\thirty.qdf /P=2");
} catch (IOException e) {
writer.writeDebug("--* exec failed: error " +
e.getMessage());
return (-1);
}
int exitStatus = -1000000;
do {
try {
exitStatus = proc.waitFor();
} catch (InterruptedException e) {
writer.writeDebug("wait interrupted " +
e.getMessage());
}
} while (exitStatus == -1000000);
return (exitStatus);
}//end Print
The Print method launches another executable called LMWPrint.exe, which
resides on the same machine as my JSP, Java class bean code and JRUN
Server.
Can you NOT start another executable on the same machine from a call
within
a JSP to a method in a JavaBean? If I run the JavaBean as a stand alone
Java class, the Print method works, and spawns off another process that
opens LMWPrint.exe. But when I call the Print method from a JSP as
follows:
<jsp:useBean id="Test" scope="session" class="TestProcess"/>
<%
int yes = Test.Print();
if ( yes == (-1) ) {%>
<H1>Error occurred trying to execute LMWPrint</H1>
<%} else %>
<h1>Automation of LMWPrint completed</h1>
I get the above error message.
Anyone have an ideas/suggestions?
Celeste
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