clear cached logger objects when necessary

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/ec/trunk@38086 72102866-910b-0410-8b05-ffd578937521

EcLogger.h

@@ -112,5 +112,9 @@
 
 @end
 
+/** Notification sent when the logging set of cached loggers is emptied.
+ */
+extern NSString* const EcLoggersDidChangeNotification;
+
 #endif
 

EcLogger.m

@@ -33,6 +33,9 @@
 #import "EcProcess.h"
 #import "EcLogger.h"
 
+NSString* const EcLoggersDidChangeNotification
+  = @"EcLoggersDidChangeNotification";
+
 @implementation	EcLogger
 
 static Class            loggersClass;
@@ -100,11 +103,25 @@ static NSArray          *modes;
 
 + (void) setFactory: (Class)c
 {
+  NSMutableArray        *old = nil;
+
   if (Nil == c) c = [self class];
   NSAssert([c isSubclassOfClass: self], NSInvalidArgumentException);
   [loggersLock lock];
-  loggersClass = c;
+  if (loggersClass != c)
+    {
+      old = loggers;
+      loggers = [NSMutableArray new];
+      loggersClass = c;
+    }
   [loggersLock unlock];
+  if (nil != old)
+    {
+      [old makeObjectsPerformSelector: @selector(flush)];
+      [old release];
+      [[NSNotificationCenter defaultCenter] postNotificationName:
+	EcLoggersDidChangeNotification object: self];
+    }
 }
 
 /* Should only be called on main thread, but doesn't matter.

EcProcess.m

@@ -1495,6 +1495,15 @@ static NSString	*noFiles = @"No log files to archive";
   return cmdSignalled;
 }
 
+- (void) ecLoggersChanged: (NSNotification*)n
+{
+  DESTROY(alertLogger);
+  DESTROY(auditLogger);
+  DESTROY(debugLogger);
+  DESTROY(errorLogger);
+  DESTROY(warningLogger);
+}
+
 - (NSDate*) ecStarted
 {
   return started;
@@ -3814,6 +3823,12 @@ NSLog(@"Ignored attempt to set timer interval to %g ... using 10.0", interval);
 	name: NSUserDefaultsDidChangeNotification
 	object: [NSUserDefaults standardUserDefaults]];
 
+      [[NSNotificationCenter defaultCenter]
+	addObserver: self
+	selector: @selector(ecLoggersChanged:)
+	name: EcLoggersDidChangeNotification
+	object: nil];
+
       [self cmdMesgCache];
 
       [self cmdDefaultsChanged: nil];