/**
* Doing the start, stop, reload and lazy unload of webapps inside all hosts respectively when
* getting request.
*
* @param nameOfOperation the operation to be performed in oder to hot update the host
* @throws CarbonException if errors occurs when hot update the host
*/
private void handleHotUpdateToHost(String nameOfOperation) throws CarbonException {
if (DataHolder.getHotUpdateService() != null) {
List<String> mappings =
URLMappingHolder.getInstance().getUrlMappingsPerApplication(this.context.getName());
Engine engine = DataHolder.getCarbonTomcatService().getTomcat().getEngine();
Context hostContext;
Host host;
for (String hostName : mappings) {
host = (Host) engine.findChild(hostName);
if (host != null) {
hostContext = (Context) host.findChild("/");
if (hostContext != null) {
if (nameOfOperation.equalsIgnoreCase("start")) {
start(hostContext);
} else if (nameOfOperation.equalsIgnoreCase("stop")) {
stop(hostContext);
} else if (nameOfOperation.equalsIgnoreCase("reload")) {
reload(hostContext);
} else if (nameOfOperation.equalsIgnoreCase("lazyunload")) {
lazyUnload(hostContext);
DataHolder.getHotUpdateService().removeHost(hostName);
} else if (nameOfOperation.equalsIgnoreCase("delete")) {
DataHolder.getHotUpdateService().deleteHost(hostName);
}
}
}
}
}
}
/**
* Return a File object representing the "application root" directory for our associated Host.
*
* @return The AppBase //TODO - when webapp exploding is supported for stratos, this should return
* the tenant's webapp dir
*/
protected File getAppBase() {
File appBase = null;
File file = new File(DataHolder.getCarbonTomcatService().getTomcat().getHost().getAppBase());
/*if (!file.isAbsolute()) {
file = new File(System.getProperty("catalina.base"),
host.getAppBase());
}*/
try {
appBase = file.getCanonicalFile();
} catch (IOException e) {
appBase = file;
}
return appBase;
}
private void lazyUnload(Context context) throws CarbonException {
Host host = DataHolder.getCarbonTomcatService().getTomcat().getHost();
try {
if (context.getAvailable()) {
// If the following is not done, the Realm will throw a LifecycleException, because
// Realm.stop is called for each context.
context.setRealm(null);
context.stop();
context.destroy();
host.removeChild(context);
log.info("Unloaded webapp: " + context);
}
// if the webapp is stopped above context.getAvailable() becomes false.
// So to unload stopped webapps this is done.
else if (LifecycleState.STOPPED.equals(context.getState())) {
context.setRealm(null);
context.destroy();
host.removeChild(context);
log.info("Unloaded webapp: " + context);
}
} catch (Exception e) {
throw new CarbonException("Cannot lazy unload webapp " + this.context, e);
}
}
