Hello Donie and all others,
I think static classes are once per Java Virtual Machine. So
your question could be extended to: Is it compatible with the
specs to run all webapps within the same JVM? Is this behaviour
supposed to be portable to other servlet containers and later
versions of Tomcat?
I looked through the servlet spec and didn't find anything about
it. As I'm very interested in this I would really appreciate if
some of the list's specialists could answer this.
If this behaviour is portable: Couldn't this be used to easily
communicate between webapps?
Donie, I think the easiest solution for you would be to have one
static class with it's own class name per webapp, e.g.
vMmscWebApp1, vMmscWebApp2.
A nicer solution would be a static class which holds references
to instances (one per webapp) of the vMmsc-class.
Regards.
Andreas
On 15 Oct 2002 at 11:11, Donie Kelly wrote:
> Hi
> I have written a static class which is populated with data on startup of my
> servlets and is suppose to be use in the context of the request. However,
> the static class seems to return the same information for all webapps and
> holds the configuration of the last servlet run on startup. Here is the
> code... As you can see I want to use something that looks like the
> System.Properties but System.Properties is gloabal so it's no use to me. I
> want to be able to set the webapp name here so it's used during processing
> but at the moment it's only returning the last name configured for the last
> webapp.
>
> Any ideas why this is happening. What have I done wrong to make this class
> appear global?
> Thanks
> Donie
>
>
> import org.apache.log4j.Category;
> import java.util.Hashtable;
> import java.util.Properties;
> import java.io.InputStream;
>
> public class vMmsc
> {
> static Category log = Category.getInstance(vMmsc.class.getName());
> public final static String version = "$Revision: 1.3 $$Date: 10 Oct
> 2002 11:57:48 $";
> public static String getVersion() { return version; }
> private static Properties props=new Properties();
>
> // Defeats instantiation
> private vMmsc(){}
>
> public static void load(InputStream is)
> {
> try
> {
> props.load(is);
> }
> catch(Exception ex)
> {
> log.error("Problem loading property file: " + ex.getMessage());
>
> }
> }
>
> public static void setProperty(String Name, String Value)
> {
> props.setProperty(Name, Value);
> }
>
> public static String getProperty(String Name)
> {
> String Value = props.getProperty(Name);
> if(Value==null || Value.equalsIgnoreCase(""))
> log.debug("The property value " + Name + " is not defined");
> return Value;
> }
>
> public static String getProperty(String Name, String defaultValue)
> {
> String Value = props.getProperty(Name);
> if(Value==null || Value.equalsIgnoreCase(""))
> {
> log.debug("The property value " + Name + " is returning it's
> default value");
> return defaultValue;
> }
> return Value;
> }
>
> public static Integer getInteger(String Name)
> {
> String Value = getProperty(Name);
> if(Value==null || Value.equalsIgnoreCase(""))
> log.debug("The property value " + Name + " is not defined");
>
> return new Integer(Value);
> }
>
> public static Integer getInteger(String Name, int defaultValue)
> {
> String Value = getProperty(Name);
> if(Value==null || Value.equalsIgnoreCase(""))
> {
> log.debug("The property value " + Name + " is returning it's
> default value");
> return new Integer(defaultValue);
> }
> return new Integer(Value);
> }
>
> // Return true if property is enabled/yes/true
> public static boolean isEnabled(String Name)
> {
> String Value = getProperty(Name);
>
> if(Value!=null)
> if(Value.equalsIgnoreCase("yes") ||
> Value.equalsIgnoreCase("true") ||
> Value.equalsIgnoreCase("enabled") ||
> Value.equalsIgnoreCase("1"))
> return true;
> return false;
> }
> }
>
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