https://issues.apache.org/bugzilla/show_bug.cgi?id=51445
Bug #: 51445
Summary: Tomcat 7 SingleThreadModel Problem
Product: Tomcat 7
Version: 7.0.12
Platform: PC
OS/Version: Linux
Status: NEW
Severity: critical
Priority: P2
Component: Catalina
AssignedTo: [email protected]
ReportedBy: [email protected]
Classification: Unclassified
I have noticed that in tomcat 7 if we implement SingleThreadModel and
initialize some variables into init(ServletConfig config) method, in that case
values initialized in init(ServletConfig config) not reflected into service
block.
For Example : Following code will print "0".
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.SingleThreadModel;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class test extends HttpServlet implements SingleThreadModel
{
int i = 0;
@Override
public void init(ServletConfig config) throws ServletException
{
super.init(config);
i = 10;
}
protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try
{
out.println(i);
}
finally
{
out.close();
}
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException
{
processRequest(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException
{
processRequest(request, response);
}
@Override
public String getServletInfo()
{
return "Short description";
}
}
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