moved from BASE/util

diff --git a/HLT/rec/AliHLTDynamicAliLog.cxx b/HLT/rec/AliHLTDynamicAliLog.cxx
new file mode 100644 (file)
index 0000000..50e770c
--- /dev/null
+++ b/HLT/rec/AliHLTDynamicAliLog.cxx
@@ -0,0 +1,103 @@
+// @(#) $Id$
+
+/**************************************************************************
+ * This file is property of and copyright by the ALICE HLT Project        * 
+ * ALICE Experiment at CERN, All rights reserved.                         *
+ *                                                                        *
+ * Primary Authors: Matthias Richter <Matthias.Richter@ift.uib.no>        *
+ *                  for The ALICE HLT Project.                            *
+ *                                                                        *
+ * Permission to use, copy, modify and distribute this software and its   *
+ * documentation strictly for non-commercial purposes is hereby granted   *
+ * without fee, provided that the above copyright notice appears in all   *
+ * copies and that both the copyright notice and this permission notice   *
+ * appear in the supporting documentation. The authors make no claims     *
+ * about the suitability of this software for any purpose. It is          *
+ * provided "as is" without express or implied warranty.                  *
+ **************************************************************************/
+
+/** @file   AliHLTDynamicAliLog.cxx
+    @author Matthias Richter
+    @date   
+    @brief  Implementation of dynamically loaded AliLog functionality
+*/
+
+#include <sstream>
+#include <iostream>
+#include "AliLog.h"
+#include "AliHLTLogging.h"
+#include "AliHLTDataTypes.h"
+
+/**
+ * Notification callback for AliRoot logging methods
+ */
+void LogNotification(AliLog::EType_t /*level*/, const char* /*message*/)
+{
+  // Notification callback for AliRoot logging methods
+
+  AliHLTLogging hltlog;
+  // in case of the initialized callback we never want to redirect
+  // HLT logging messages to AliLog (that would be a circular function call)
+  hltlog.SwitchAliLog(0);
+  hltlog.Logging(kHLTLogInfo, "NotificationHandler", "AliLog", AliHLTLogging::fgLogstr.str().c_str());
+  AliHLTLogging::fgLogstr.clear();
+  string empty("");
+  AliHLTLogging::fgLogstr.str(empty);
+}
+
+/**
+ * This is the entry point for AliLog messages.
+ * The function pointer is fetched by the AliLogging class after libAliHLTUtil
+ * was loaded dynamically. By that we can keep libHLTbase free of AliRoot
+ * libraries.
+ */
+extern "C" int AliDynamicMessage(AliHLTComponentLogSeverity severity, 
+                                const char* originClass, const char* originFunc,
+                                const char* file, int line, const char* message) 
+{
+  // see header file for class documentation
+
+  switch (severity) {
+  case kHLTLogBenchmark: 
+    AliLog::Message(AliLog::kInfo, message, "HLT", originClass, originFunc, file, line);
+    break;
+  case kHLTLogDebug:
+    AliLog::Message(AliLog::kDebug, message, "HLT", originClass, originFunc, file, line);
+    break;
+  case kHLTLogInfo:
+    AliLog::Message(AliLog::kInfo, message, "HLT", originClass, originFunc, file, line);
+    break;
+  case kHLTLogWarning:
+    AliLog::Message(AliLog::kWarning, message, "HLT", originClass, originFunc, file, line);
+    break;
+  case kHLTLogError:
+    AliLog::Message(AliLog::kError, message, "HLT", originClass, originFunc, file, line);
+    break;
+  case kHLTLogFatal:
+    AliLog::Message(AliLog::kWarning, message, "HLT", originClass, originFunc, file, line);
+    break;
+  default:
+    break;
+  }
+  return 0;
+}
+
+/**
+ * Init the AliLog callback.
+ * If libHLTbase is used within AliRoot, no message callback is initialized since
+ * all logging happens through AliRoot. If externally used by other frameworks (e.g.
+ * PubSub), all messages from components to AliLog must be trapped and redirected
+ * to the external callback.
+ */
+extern "C" int InitAliDynamicMessageCallback() 
+{
+  // older versions of AliLog does not support the notification callback and
+  // stringstreams, but they support the logging macros in general
+#ifndef NO_ALILOG_NOTIFICATION
+  AliLog* log=new AliLog;
+  log->SetLogNotification(LogNotification);
+  log->SetStreamOutput(&AliHLTLogging::fgLogstr);
+  return 0;
+#endif // NO_ALILOG_NOTIFICATION
+  return -ENOSYS;
+}