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Reference Guide
TSelEventGen.cxx
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1 // @(#)root/proof:$Id$
2 // Author: Sangsu Ryu 22/06/2010
3 
4 /*************************************************************************
5  * Copyright (C) 1995-2005, Rene Brun and Fons Rademakers. *
6  * All rights reserved. *
7  * *
8  * For the licensing terms see $ROOTSYS/LICENSE. *
9  * For the list of contributors see $ROOTSYS/README/CREDITS. *
10  *************************************************************************/
11 
12 /** \class TSelEventGen
13 \ingroup proofbench
14 
15 Selector for event file generation.
16 List of files to be generated for each node is provided by client.
17 And list of files generated is sent back.
18 Existing files are reused if not forced to be regenerated.
19 
20 */
21 
22 #define TSelEventGen_cxx
23 
24 #include "TSelEventGen.h"
25 #include "TParameter.h"
26 #include "TProofNodeInfo.h"
27 #include "TProofBenchTypes.h"
28 #include "TProof.h"
29 #include "TMap.h"
30 #include "TDSet.h"
31 #include "TEnv.h"
32 #include "TFileInfo.h"
33 #include "TFile.h"
34 #include "TSortedList.h"
35 #include "TRandom.h"
36 #include "Event.h"
37 #include "TProofServ.h"
38 #include "TMacro.h"
39 
41 
42 ////////////////////////////////////////////////////////////////////////////////
43 /// Constructor
44 
46  : fBaseDir(""), fNEvents(100000), fNTracks(100), fNTracksMax(-1),
47  fRegenerate(kFALSE), fTotalGen(0), fFilesGenerated(0),
48  fGenerateFun(0), fChain(0)
49 {
50  if (gProofServ){
52  // Two directories up
55  }
56  else{
57  fBaseDir="";
58  }
59 }
60 
61 ////////////////////////////////////////////////////////////////////////////////
62 /// The Begin() function is called at the start of the query.
63 /// When running with PROOF Begin() is only called on the client.
64 /// The tree argument is deprecated (on PROOF 0 is passed).
65 
67 {
68  TString option = GetOption();
69  // Determine the test type
70  TMap *filemap = dynamic_cast<TMap *>
71  (fInput->FindObject("PROOF_FilesToProcess"));
72  if (filemap) {
73  //Info("Begin", "dumping the file map:");
74  //filemap->Print();
75  } else {
76  if (fInput->FindObject("PROOF_FilesToProcess")) {
77  Error("Begin", "object 'PROOF_FilesToProcess' found but not a map"
78  " (%s)", fInput->FindObject("PROOF_FilesToProcess")->ClassName());
79  } else {
80  Error("Begin", "object 'PROOF_FilesToProcess' not found");
81  }
82  }
83 }
84 
85 ////////////////////////////////////////////////////////////////////////////////
86 /// The SlaveBegin() function is called after the Begin() function.
87 /// When running with PROOF SlaveBegin() is called on each slave server.
88 /// The tree argument is deprecated (on PROOF 0 is passed).
89 
91 {
92  Init(tree);
93 
94  TString option = GetOption();
95 
96  //get parameters
97 
98  Bool_t found_basedir=kFALSE;
99  Bool_t found_nevents=kFALSE;
100  Bool_t found_ntracks=kFALSE;
101  Bool_t found_ntrkmax=kFALSE;
102  Bool_t found_regenerate=kFALSE;
103 
104  TIter nxt(fInput);
105  TString sinput;
106  TObject *obj;
107 
108  while ((obj = nxt())){
109 
110  sinput=obj->GetName();
111  //Info("SlaveBegin", "Input list: %s", sinput.Data());
112 
113  if (sinput.Contains("PROOF_BenchmarkBaseDir")){
114  TNamed* a = dynamic_cast<TNamed*>(obj);
115  if (a){
116  TString bdir = a->GetTitle();
117  if (!bdir.IsNull()){
118  TUrl u(bdir, kTRUE);
119  Bool_t isLocal = !strcmp(u.GetProtocol(), "file") ? kTRUE : kFALSE;
120  if (isLocal && !gSystem->IsAbsoluteFileName(u.GetFile()))
121  u.SetFile(TString::Format("%s/%s", fBaseDir.Data(), u.GetFile()));
122  if (isLocal) {
123  if ((gSystem->AccessPathName(u.GetFile()) &&
124  gSystem->mkdir(u.GetFile(), kTRUE) == 0) ||
126  // Directory is writable
127  fBaseDir = u.GetFile();
128  Info("SlaveBegin", "using base directory \"%s\"", fBaseDir.Data());
129  } else{
130  // Directory is not writable or not available, use default directory
131  Warning("SlaveBegin", "\"%s\" directory is not writable or not existing,"
132  " using default directory: %s",
133  bdir.Data(), fBaseDir.Data());
134  }
135  } else {
136  // We assume the user knows what it does
137  fBaseDir = bdir;
138  Info("SlaveBegin", "using non local base directory \"%s\"", fBaseDir.Data());
139  }
140  } else{
141  Info("SlaveBegin", "using default directory: %s",
142  fBaseDir.Data());
143  }
144  found_basedir=kTRUE;
145  }
146  else{
147  Error("SlaveBegin", "PROOF_BenchmarkBaseDir not type TNamed");
148  }
149  continue;
150  }
151  if (sinput.Contains("PROOF_BenchmarkNEvents")){
152  TParameter<Long64_t>* a=dynamic_cast<TParameter<Long64_t>*>(obj);
153  if (a){
154  fNEvents= a->GetVal();
155  found_nevents=kTRUE;
156  }
157  else{
158  Error("SlaveBegin", "PROOF_BenchmarkEvents not type TParameter"
159  "<Long64_t>*");
160  }
161  continue;
162  }
163  if (sinput.Contains("PROOF_BenchmarkNTracks")){
164  TParameter<Int_t>* a=dynamic_cast<TParameter<Int_t>*>(obj);
165  if (a){
166  fNTracks=a->GetVal();
167  found_ntracks=kTRUE;
168  }
169  else{
170  Error("SlaveBegin", "PROOF_BenchmarkNTracks not type TParameter"
171  "<Int_t>*");
172  }
173  continue;
174  }
175  if (sinput.Contains("PROOF_BenchmarkNTracksMax")){
176  TParameter<Int_t>* a=dynamic_cast<TParameter<Int_t>*>(obj);
177  if (a){
178  fNTracksMax=a->GetVal();
179  found_ntrkmax=kTRUE;
180  }
181  else{
182  Error("SlaveBegin", "PROOF_BenchmarkNTracksMax not type TParameter"
183  "<Int_t>*");
184  }
185  continue;
186  }
187  if (sinput.Contains("PROOF_BenchmarkRegenerate")){
188  TParameter<Int_t>* a=dynamic_cast<TParameter<Int_t>*>(obj);
189  if (a){
190  fRegenerate=a->GetVal();
191  found_regenerate=kTRUE;
192  }
193  else{
194  Error("SlaveBegin", "PROOF_BenchmarkRegenerate not type TParameter"
195  "<Int_t>*");
196  }
197  continue;
198  }
199  if (sinput.Contains("PROOF_GenerateFun")){
200  TNamed *a = dynamic_cast<TNamed*>(obj);
201  if (!(fGenerateFun = dynamic_cast<TMacro *>(fInput->FindObject(a->GetTitle())))) {
202  Error("SlaveBegin", "PROOF_GenerateFun requires the TMacro object in the input list");
203  }
204  continue;
205  }
206  }
207 
208  if (!found_basedir){
209  Warning("SlaveBegin", "PROOF_BenchmarkBaseDir not found; using default:"
210  " %s", fBaseDir.Data());
211  }
212  if (!found_nevents){
213  Warning("SlaveBegin", "PROOF_BenchmarkNEvents not found; using default:"
214  " %lld", fNEvents);
215  }
216  if (!found_ntracks){
217  Warning("SlaveBegin", "PROOF_BenchmarkNTracks not found; using default:"
218  " %d", fNTracks);
219  }
220  if (!found_ntrkmax){
221  Warning("SlaveBegin", "PROOF_BenchmarkNTracksMax not found; using default:"
222  " %d", fNTracksMax);
223  } else if (fNTracksMax <= fNTracks) {
224  Warning("SlaveBegin", "PROOF_BenchmarkNTracksMax must be larger then"
225  " fNTracks=%d ; ignoring", fNTracks);
226  fNTracksMax = -1;
227  found_ntrkmax = kFALSE;
228  }
229  if (!found_regenerate){
230  Warning("SlaveBegin", "PROOF_BenchmarkRegenerate not found; using"
231  " default: %d", fRegenerate);
232  }
233 
234  fFilesGenerated = new TList();
235 
236  TString hostname(TUrl(gSystem->HostName()).GetHostFQDN());
237  TString thisordinal = gProofServ ? gProofServ->GetOrdinal() : "n.d";
238  TString sfilegenerated =
239  TString::Format("PROOF_FilesGenerated_%s_%s", hostname.Data(), thisordinal.Data());
240  fFilesGenerated->SetName(sfilegenerated);
242 }
243 
244 ////////////////////////////////////////////////////////////////////////////////
245 ///Generate files for IO-bound run
246 ///Input parameters
247 /// filename: The name of the file to be generated
248 /// sizenevents: Either the number of events to generate when
249 /// filetype==kPBFileBenchmark
250 /// or the size of the file to generate when
251 /// filetype==kPBFileCleanup
252 ///Returns
253 /// Either Number of entries in the file when
254 /// filetype==kPBFileBenchmark
255 /// or bytes written when filetype==kPBFileCleanup
256 ///return 0 in case error
257 
258 Long64_t TSelEventGen::GenerateFiles(const char *filename, Long64_t sizenevents)
259 {
260  Long64_t nentries=0;
261  TDirectory* savedir = gDirectory;
262  //printf("current dir=%s\n", gDirectory->GetPath());
263 
264  TFile *f = TFile::Open(filename, "RECREATE");
265 
266  savedir->cd();
267 
268  if (!f || f->IsZombie()) return 0;
269 
270  Event *event=new Event();
271  Event *ep = event;
272  TTree* eventtree= new TTree("EventTree", "Event Tree");
273  eventtree->SetDirectory(f);
274 
275  const Int_t buffersize=32000;
276  eventtree->Branch("event", "Event", &ep, buffersize, 1);
277  eventtree->AutoSave();
278 
279  Long64_t i=0;
280  Long64_t size_generated=0;
281 
282 // f->SetCompressionLevel(0); //no compression
283  Int_t ntrks = fNTracks;
284 
285  Info("GenerateFiles", "Generating %s", filename);
286  while (sizenevents--){
287  //event->Build(i++,fNTracksBench,0);
288  if (fNTracksMax > fNTracks) {
289  // Required to smear the number of tracks between [min,max]
291  }
292  event->Build(i++, ntrks, 0);
293  size_generated+=eventtree->Fill();
294  }
295  nentries=eventtree->GetEntries();
296  Info("GenerateFiles", "%s generated with %lld entries", filename, nentries);
297  savedir = gDirectory;
298 
299  f = eventtree->GetCurrentFile();
300  f->cd();
301  eventtree->Write();
302  eventtree->SetDirectory(0);
303 
304  f->Close();
305  delete f;
306  f = 0;
307  eventtree->Delete();
308  event->Delete();
309  savedir->cd();
310 
311  return nentries;
312 }
313 
314 ////////////////////////////////////////////////////////////////////////////////
315 /// The Process() function is called for each entry in the tree (or possibly
316 /// keyed object in the case of PROOF) to be processed. The entry argument
317 /// specifies which entry in the currently loaded tree is to be processed.
318 /// It can be passed to either TTree::GetEntry() or TBranch::GetEntry()
319 /// to read either all or the required parts of the data. When processing
320 /// keyed objects with PROOF, the object is already loaded and is available
321 /// via the fObject pointer.
322 ///
323 /// This function should contain the "body" of the analysis. It can contain
324 /// simple or elaborate selection criteria, run algorithms on the data
325 /// of the event and typically fill histograms.
326 
328 {
329  // WARNING when a selector is used with a TChain, you must use
330  // the pointer to the current TTree to call GetEntry(entry).
331  // The entry is always the local entry number in the current tree.
332  // Assuming that fChain is the pointer to the TChain being processed,
333  // use fChain->GetTree()->GetEntry(entry).
334 
335  TDSetElement *fCurrent = 0;
336  TPair *elemPair = 0;
337  if (fInput && (elemPair = dynamic_cast<TPair *>
338  (fInput->FindObject("PROOF_CurrentElement")))) {
339  if ((fCurrent = dynamic_cast<TDSetElement *>(elemPair->Value()))) {
340  Info("Process", "entry %lld: file: '%s'", entry, fCurrent->GetName());
341  } else {
342  Error("Process", "entry %lld: no file specified!", entry);
343  return kFALSE;
344  }
345  }
346 
347  // Generate
348  TString filename(fCurrent->GetName());
349  if (!fBaseDir.IsNull()) {
350  if (fBaseDir.Contains("<fn>")) {
351  filename = fBaseDir;
352  filename.ReplaceAll("<fn>", fCurrent->GetName());
353  } else {
354  filename.Form("%s/%s", fBaseDir.Data(), fCurrent->GetName());
355  }
356  }
357  TString fndset(filename);
358 
359  // Set the Url for remote access
360  TString seed = TString::Format("%s/%s", gSystem->HostName(), filename.Data()), dsrv;
361  TUrl basedirurl(filename, kTRUE);
362  if (!strcmp(basedirurl.GetProtocol(), "file")) {
364  TProofServ::FilterLocalroot(fndset, dsrv);
365  }
366 
367  //generate files
368  Long64_t neventstogenerate = fNEvents;
369 
370  Long64_t entries_file=0;
371  Long64_t filesize=0;
372  Bool_t filefound=kFALSE;
373  FileStat_t filestat;
374  TUUID uuid;
375  if (!fRegenerate && !gSystem->GetPathInfo(filename, filestat)) { //stat'ed
376  TFile *f = TFile::Open(filename);
377  if (f && !f->IsZombie()){
378  TTree* t = (TTree *) f->Get("EventTree");
379  if (t) {
380  entries_file = t->GetEntries();
381  if (entries_file == neventstogenerate) {
382  // File size seems to be correct, skip generation
383  Info("Process", "bench file (%s, entries=%lld) exists:"
384  " skipping generation.", filename.Data(), entries_file);
385  filesize = f->GetSize();
386  uuid = f->GetUUID();
387  filefound = kTRUE;
388  }
389  }
390  f->Close();
391  }
392  SafeDelete(f);
393  }
394 
395  // Make sure there is enough space left of the device, if local
396  TString bdir(fBaseDir);
397  bdir.ReplaceAll("<fn>", "");
398  if (!gSystem->AccessPathName(bdir)) {
399  Long_t devid, devbsz, devbtot, devbfree;
400  gSystem->GetFsInfo(bdir, &devid, &devbsz, &devbtot, &devbfree);
401  // Must be more than 10% of space and at least 1 GB
402  Long_t szneed = 1024 * 1024 * 1024, tomb = 1024 * 1024;
403  if (devbfree * devbsz < szneed || devbfree < 0.1 * devbtot) {
404  Error("Process", "not enough free space on device (%ld MB < {%ld, %ld} MB):"
405  " skipping generation of: %s",
406  (devbfree * devbsz) / tomb,
407  szneed / tomb, (Long_t) (0.1 * devbtot * devbsz / tomb),
408  filename.Data());
410  }
411  }
412 
413  if (!filefound) { // Generate
414  gRandom->SetSeed(static_cast<UInt_t>(TMath::Hash(seed)));
415  if (fGenerateFun) {
416  TString fargs = TString::Format("\"%s\",%lld", filename.Data(), neventstogenerate);
417  entries_file = (Long64_t) fGenerateFun->Exec(fargs);
418  } else {
419  entries_file = GenerateFiles(filename, neventstogenerate);
420  }
421 
422  TFile *f = TFile::Open(filename);
423  if (f && !f->IsZombie()) {
424  filesize = f->GetSize();
425  uuid = f->GetUUID();
426  f->Close();
427  } else {
428  Error("Process", "can not open generated file: %s", filename.Data());
430  return kFALSE;
431  }
432 
433  SafeDelete(f);
434  }
435 
436  // Add meta data to the file info
437  TFileInfoMeta* fimeta = new TFileInfoMeta("/EventTree", "TTree", entries_file);
438  TMD5* md5 = 0;
439  if (!strcmp(TUrl(filename,kTRUE).GetProtocol(), "file"))
440  md5 = TMD5::FileChecksum(filename);
441  TString md5s = (md5) ? md5->AsString() : "";
442  TFileInfo *fi = new TFileInfo(TString::Format("%s%s", dsrv.Data(), fndset.Data()),
443  filesize, uuid.AsString(), md5s.Data(), fimeta);
444  SafeDelete(md5);
445 
446  // Mark it as staged
448 
449  // Add the fileinfo to the list
451 
452  return kTRUE;
453 }
454 
455 ////////////////////////////////////////////////////////////////////////////////
456 /// The SlaveTerminate() function is called after all entries or objects
457 /// have been processed. When running with PROOF SlaveTerminate() is called
458 /// on each slave server
459 
461 {
462  if (fFilesGenerated && fFilesGenerated->GetSize() > 0) {
464  Info("SlaveTerminate",
465  "list '%s' of files generated by this worker added to the output list",
467  } else {
468  if (!fFilesGenerated) {
469  Warning("SlaveTerminate", "no list of generated files defined!");
470  } else {
471  Warning("SlaveTerminate", "list of generated files is empty!");
472  }
473  }
474 }
475 
476 ////////////////////////////////////////////////////////////////////////////////
477 /// The Terminate() function is the last function to be called during
478 /// a query. It always runs on the client, it can be used to present
479 /// the results graphically or save the results to file.
480 
482 {
483 }
484 
485 ////////////////////////////////////////////////////////////////////////////////
486 
488 {
489  Printf("fNEvents=%lld", fNEvents);
490  Printf("fBaseDir=%s", fBaseDir.Data());
491  Printf("fNTracks=%d", fNTracks);
492  Printf("fRegenerate=%d", fRegenerate);
493 }
494 
void SetFile(const char *file)
Definition: TUrl.h:88
virtual Bool_t cd(const char *path=0)
Change current directory to "this" directory.
TString fBaseDir
Definition: TSelEventGen.h:37
virtual const char * GetName() const
Returns name of object.
Definition: TNamed.h:47
virtual Bool_t AccessPathName(const char *path, EAccessMode mode=kFileExists)
Returns FALSE if one can access a file using the specified access mode.
Definition: TSystem.cxx:1276
virtual Bool_t IsAbsoluteFileName(const char *dir)
Return true if dir is an absolute pathname.
Definition: TSystem.cxx:949
virtual void Info(const char *method, const char *msgfmt,...) const
Issue info message.
Definition: TObject.cxx:854
TSelectorList * fOutput
! List of objects created during processing
Definition: TSelector.h:44
long long Long64_t
Definition: RtypesCore.h:69
static TMD5 * FileChecksum(const char *file)
Returns checksum of specified file.
Definition: TMD5.cxx:474
virtual void Delete(Option_t *option="")
Delete this tree from memory or/and disk.
Definition: TTree.cxx:3550
const char Option_t
Definition: RtypesCore.h:62
This class represents a WWW compatible URL.
Definition: TUrl.h:35
TString & ReplaceAll(const TString &s1, const TString &s2)
Definition: TString.h:687
static void FilterLocalroot(TString &path, const char *url="root://dum/")
If &#39;path&#39; is local and &#39;dsrv&#39; is Xrootd, apply &#39;path.Localroot&#39; settings, if any. ...
int GetPathInfo(const char *path, Long_t *id, Long_t *size, Long_t *flags, Long_t *modtime)
Get info about a file: id, size, flags, modification time.
Definition: TSystem.cxx:1374
virtual Int_t Fill()
Fill all branches.
Definition: TTree.cxx:4374
const char * GetProtocol() const
Definition: TUrl.h:67
Long64_t fNEvents
Definition: TSelEventGen.h:39
virtual void SetOwner(Bool_t enable=kTRUE)
Set whether this collection is the owner (enable==true) of its content.
virtual void SlaveBegin(TTree *tree)
The SlaveBegin() function is called after the Begin() function.
virtual void Print(Option_t *option="") const
This method must be overridden when a class wants to print itself.
A ROOT file is a suite of consecutive data records (TKey instances) with a well defined format...
Definition: TFile.h:47
virtual TObject * Get(const char *namecycle)
Return pointer to object identified by namecycle.
virtual Long_t Exec(const char *params=0, Int_t *error=0)
Execute this macro with params, if params is 0, default parameters (set via SetParams) are used...
Definition: TMacro.cxx:266
virtual int GetFsInfo(const char *path, Long_t *id, Long_t *bsize, Long_t *blocks, Long_t *bfree)
Get info about a file system: fs type, block size, number of blocks, number of free blocks...
Definition: TSystem.cxx:1448
Long64_t GenerateFiles(const char *filename, Long64_t sizenevents)
Generate files for IO-bound run Input parameters filename: The name of the file to be generated sizen...
const char * AsString() const
Return message digest as string.
Definition: TMD5.cxx:220
Basic string class.
Definition: TString.h:131
#define f(i)
Definition: RSha256.hxx:104
int Int_t
Definition: RtypesCore.h:41
bool Bool_t
Definition: RtypesCore.h:59
virtual void SlaveTerminate()
The SlaveTerminate() function is called after all entries or objects have been processed.
virtual int mkdir(const char *name, Bool_t recursive=kFALSE)
Make a file system directory.
Definition: TSystem.cxx:904
void SetBit(UInt_t f, Bool_t set)
Set or unset the user status bits as specified in f.
Definition: TObject.cxx:694
virtual TObject * FindObject(const char *name) const
Delete a TObjLink object.
Definition: TList.cxx:574
Int_t fRegenerate
Definition: TSelEventGen.h:42
static TFile * Open(const char *name, Option_t *option="", const char *ftitle="", Int_t compress=1, Int_t netopt=0)
Create / open a file.
Definition: TFile.cxx:3976
This class defines a UUID (Universally Unique IDentifier), also known as GUIDs (Globally Unique IDent...
Definition: TUUID.h:42
const char * GetFile() const
Definition: TUrl.h:72
Manages an element of a TDSet.
Definition: TDSet.h:66
virtual const char * ClassName() const
Returns name of class to which the object belongs.
Definition: TObject.cxx:128
static TString Format(const char *fmt,...)
Static method which formats a string using a printf style format descriptor and return a TString...
Definition: TString.cxx:2286
virtual void Terminate()
The Terminate() function is the last function to be called during a query.
This code implements the MD5 message-digest algorithm.
Definition: TMD5.h:44
The TNamed class is the base class for all named ROOT classes.
Definition: TNamed.h:29
virtual void SetSeed(ULong_t seed=0)
Set the random generator seed.
Definition: TRandom.cxx:589
virtual UInt_t Integer(UInt_t imax)
Returns a random integer on [ 0, imax-1 ].
Definition: TRandom.cxx:341
virtual const char * GetOption() const
Definition: TSelector.h:59
TList * fFilesGenerated
Definition: TSelEventGen.h:45
TObject * Value() const
Definition: TMap.h:121
R__ALWAYS_INLINE Bool_t IsZombie() const
Definition: TObject.h:134
A doubly linked list.
Definition: TList.h:44
virtual Int_t Write(const char *name=0, Int_t option=0, Int_t bufsize=0)
Write this object to the current directory.
Definition: TTree.cxx:9298
TMacro * fGenerateFun
Definition: TSelEventGen.h:47
R__EXTERN TSystem * gSystem
Definition: TSystem.h:540
Long64_t fStatus
Selector status.
Definition: TSelector.h:39
static void GetLocalServer(TString &dsrv)
Extract LOCALDATASERVER info in &#39;dsrv&#39;.
auto * a
Definition: textangle.C:12
void Form(const char *fmt,...)
Formats a string using a printf style format descriptor.
Definition: TString.cxx:2264
virtual void Error(const char *method, const char *msgfmt,...) const
Issue error message.
Definition: TObject.cxx:880
TFile * GetCurrentFile() const
Return pointer to the current file.
Definition: TTree.cxx:5205
void SetName(const char *name)
Definition: TCollection.h:204
R__EXTERN TRandom * gRandom
Definition: TRandom.h:62
ULong_t Hash(const void *txt, Int_t ntxt)
#define Printf
Definition: TGeoToOCC.h:18
const Bool_t kFALSE
Definition: RtypesCore.h:88
#define SafeDelete(p)
Definition: RConfig.h:529
TString & Remove(Ssiz_t pos)
Definition: TString.h:668
long Long_t
Definition: RtypesCore.h:50
Class used by TMap to store (key,value) pairs.
Definition: TMap.h:102
virtual void SetDirectory(TDirectory *dir)
Change the tree&#39;s directory.
Definition: TTree.cxx:8550
#define ClassImp(name)
Definition: Rtypes.h:359
virtual const char * HostName()
Return the system&#39;s host name.
Definition: TSystem.cxx:311
Ssiz_t Last(char c) const
Find last occurrence of a character c.
Definition: TString.cxx:876
Describe directory structure in memory.
Definition: TDirectory.h:34
TMap implements an associative array of (key,value) pairs using a THashTable for efficient retrieval ...
Definition: TMap.h:40
virtual Long64_t GetSize() const
Returns the current file size.
Definition: TFile.cxx:1298
virtual Bool_t Process(Long64_t entry)
The Process() function is called for each entry in the tree (or possibly keyed object in the case of ...
int nentries
Definition: THbookFile.cxx:89
Bool_t Contains(const char *pat, ECaseCompare cmp=kExact) const
Definition: TString.h:619
Int_t fNTracksMax
Definition: TSelEventGen.h:41
const char * AsString() const
Return UUID as string. Copy string immediately since it will be reused.
Definition: TUUID.cxx:533
virtual Long64_t GetEntries() const
Definition: TTree.h:384
Bool_t IsNull() const
Definition: TString.h:402
Int_t fNTracks
Definition: TSelEventGen.h:40
Mother of all ROOT objects.
Definition: TObject.h:37
TSelEventGen()
pointer to the analyzed TTree or TChain
virtual Int_t Branch(TCollection *list, Int_t bufsize=32000, Int_t splitlevel=99, const char *name="")
Create one branch for each element in the collection.
Definition: TTree.cxx:1711
TList * fInput
List of objects available during processing.
Definition: TSelector.h:43
virtual Bool_t cd(const char *path=0)
Change current directory to "this" directory.
Definition: TDirectory.cxx:497
R__EXTERN TProofServ * gProofServ
Definition: TProofServ.h:347
virtual void Add(TObject *obj)
Definition: TList.h:87
TUUID GetUUID() const
Definition: TDirectory.h:160
virtual void Init(TTree *tree)
Selector for event file generation.
Definition: TSelEventGen.h:33
Definition: tree.py:1
A TTree object has a header with a name and a title.
Definition: TTree.h:70
const AParamType & GetVal() const
Definition: TParameter.h:69
#define gDirectory
Definition: TDirectory.h:213
Class describing a generic file including meta information.
Definition: TFileInfo.h:38
virtual void Begin(TTree *)
The Begin() function is called at the start of the query.
virtual const char * GetName() const
Returns name of object.
Definition: TObject.cxx:357
virtual Int_t GetSize() const
Return the capacity of the collection, i.e.
Definition: TCollection.h:182
const char * GetDataDir() const
Definition: TProofServ.h:250
const Bool_t kTRUE
Definition: RtypesCore.h:87
const char * GetOrdinal() const
Definition: TProofServ.h:253
virtual void Warning(const char *method, const char *msgfmt,...) const
Issue warning message.
Definition: TObject.cxx:866
virtual const char * GetName() const
Return name of this collection.
virtual const char * GetTitle() const
Returns title of object.
Definition: TNamed.h:48
virtual void Close(Option_t *option="")
Close a file.
Definition: TFile.cxx:917
virtual Long64_t AutoSave(Option_t *option="")
AutoSave tree header every fAutoSave bytes.
Definition: TTree.cxx:1396
const char * Data() const
Definition: TString.h:364