/**
* Creates Application instance from Tomcat Context object. If ResourceResolver is passed the
* method will also collect additional information about the application such as session count,
* session attribute count, application attribute count, servlet count, servlet stats summary and
* datasource usage summary. Collecting additional information can be CPU intensive and time
* consuming so this should be avoided unless absolutely required. Some datasource implementations
* (c3p0) are known to be prone to internal deadlocks, so this method can also hang is datasource
* usage stats is to be collected.
*
* @param context the context from which to create the Application
* @param resourceResolver the resolver to use for resources associated with the given context
* @param calcSize flag which controls whether to calculate session size
* @param containerWrapper the wrapper for the context's root containing server
* @return Application object
*/
public static Application getApplication(
Context context,
ResourceResolver resourceResolver,
boolean calcSize,
ContainerWrapperBean containerWrapper) {
// ContainerWrapperBean containerWrapper
logger.debug("Querying webapp: " + context.getName());
Application app = new Application();
app.setName(context.getName().length() > 0 ? context.getName() : "/");
app.setDocBase(context.getDocBase());
app.setDisplayName(context.getDisplayName());
app.setAvailable(containerWrapper.getTomcatContainer().getAvailable(context));
app.setDistributable(context.getDistributable());
app.setSessionTimeout(context.getSessionTimeout());
app.setServletVersion(
context.getServletContext().getMajorVersion()
+ "."
+ context.getServletContext().getMinorVersion());
if (resourceResolver != null) {
logger.debug("counting servlet attributes");
int ctxAttrCount = 0;
for (Enumeration e = context.getServletContext().getAttributeNames();
e.hasMoreElements();
e.nextElement()) {
ctxAttrCount++;
}
app.setContextAttributeCount(ctxAttrCount);
if (app.isAvailable()) {
logger.debug("collecting session information");
app.setSessionCount(context.getManager().findSessions().length);
boolean serializable = true;
int sessionAttributeCount = 0;
long size = 0;
for (Session session : context.getManager().findSessions()) {
ApplicationSession appSession = getApplicationSession(session, calcSize, false);
if (appSession != null) {
sessionAttributeCount += appSession.getObjectCount();
serializable = serializable && appSession.isSerializable();
size += appSession.getSize();
}
}
app.setSerializable(serializable);
app.setSessionAttributeCount(sessionAttributeCount);
app.setSize(size);
}
logger.debug("aggregating servlet stats");
collectApplicationServletStats(context, app);
if (resourceResolver.supportsPrivateResources() && app.isAvailable()) {
int[] scores =
getApplicationDataSourceUsageScores(context, resourceResolver, containerWrapper);
app.setDataSourceBusyScore(scores[0]);
app.setDataSourceEstablishedScore(scores[1]);
}
}
return app;
}
