From 0a6c54a10fce86a62cb6f8f8f36b8ecdd8ffa811 Mon Sep 17 00:00:00 2001
From: marian <marian@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Fri, 30 Apr 2010 08:54:55 +0000
Subject: [PATCH] Example/standard macro  to initialize TPC OCDB entries from
 AliEn OCDB Marian

---
 TPC/macros/ConfigOCDBAlien.C | 76 ++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 TPC/macros/ConfigOCDBAlien.C

diff --git a/TPC/macros/ConfigOCDBAlien.C b/TPC/macros/ConfigOCDBAlien.C
new file mode 100644
index 00000000000..3502b9216b3
--- /dev/null
+++ b/TPC/macros/ConfigOCDBAlien.C
@@ -0,0 +1,76 @@
+//
+// Macro to Setup OCDB  
+// This is just example macro - using the alien OCDB
+// Responsible: marian.ivanov@cern.ch
+// To be used:
+// 1. Before invocation of the calibration - in the calibration trains
+// 2. To setup calibration viewer.
+//  
+// ConfigOCDB  - setup default and specific data storage
+// SetupCustom - user sepcific configuration 
+//             - Values in local cache of OCDB are overwritten
+
+
+
+void SetupCustom(Int_t run);
+
+void ConfigOCDBAlien(Int_t crun=-1){
+  // 
+  TGrid * alien =     TGrid::Connect("alien://",0,0,"t"); 
+  printf("SETUP OCBD for TPC\n");
+  //
+  AliCDBManager::Instance()->SetDefaultStorage("raw://");
+   
+  Int_t run =crun;
+  if (run<0) run =0;
+  AliCDBManager::Instance()->SetRun(run);
+  AliTPCcalibDB::Instance()->SetRun(run);
+  SetupCustom(run);
+}
+
+
+void SetupCustom(Int_t run){
+  //
+  //
+  // Custom part - to be empty once we are happy with the calibration
+  //
+  //
+  // Setup magnetic field - In future this should be part of GRP functionality
+  //
+  AliGRPObject *grp = AliTPCcalibDB::GetGRP(run);
+  Float_t current = 0;
+  Float_t bz      = 0;
+  if (grp){
+    current = grp->GetL3Current((AliGRPObject::Stats)0);
+    bz = 5*current/30000.;
+    printf("Run%d\tL3 current%f\tBz\t%f\n",run,current,bz);
+  }
+  else{
+    printf("Run%d\tL3 current%f\tBz\t%f\n",run,current,bz);
+  }
+  AliMagF::BMap_t smag = AliMagF::k5kG;
+  Double_t bzfac = bz/5;
+  Double_t bzfacOrig=bzfac;
+  if (TMath::Abs(bzfac)<0.01) {  // force default magnetic field if 0 field used
+    bzfac=1;
+    bz=5;
+  }
+  AliMagF * magF = new AliMagF("Maps","Maps", 2, bzfac, 1., smag);
+  TGeoGlobalMagField::Instance()->SetField(magF);
+  printf("\n\nSET EXB FIELD\t\n\n");
+  AliTPCcalibDB::Instance()->SetExBField(magF);
+  
+  AliTPCClusterParam * paramCl = AliTPCcalibDB::Instance()->GetClusterParam(); 
+  AliTPCParam   * paramTPC = AliTPCcalibDB::Instance()->GetParameters();
+  paramCl->SetInstance(paramCl);
+
+   if (TMath::Abs(bzfacOrig)<0.05){
+    tpcRecoParam->SetUseExBCorrection(kFALSE);
+  }
+  //
+  //
+  //
+   printf("END of SETUP OCBD for TPC\n");
+}
+
+
-- 
2.43.0