WatcherStreamFileReader Class Reference

#include <WatcherStreamFileReader.h>

Public Member Functions
void	closeFile ()
const InitMsgView *	getHeader ()
edm::StreamerInputFile *	getInputFile ()
const EventMsgView *	getNextEvent ()
const bool	newHeader ()
	WatcherStreamFileReader (edm::ParameterSet const &pset)
	~WatcherStreamFileReader ()

Private Attributes
std::string	corruptedDir_
bool	end_
std::vector< std::string >	filePatterns_
std::deque< std::string >	filesInQueue_
std::string	inprocessDir_
std::string	inputDir_
std::string	processedDir_
std::auto_ptr < edm::StreamerInputFile >	streamerInputFile_
int	timeOut_
std::string	tokenFile_
int	verbosity_

Static Private Attributes
static std::string	fileName_

Detailed Description

Definition at line 26 of file WatcherStreamFileReader.h.

Constructor & Destructor Documentation

WatcherStreamFileReader::WatcherStreamFileReader

(

edm::ParameterSet const &

pset

)

Definition at line 124 of file WatcherStreamFileReader.cc.

References corruptedDir_, dir, edm::hlt::Exception, f, i, inprocessDir_, processedDir_, and tokenFile_.

                                                                           :
  inputDir_(pset.getParameter<std::string>("inputDir")),
  filePatterns_(pset.getParameter<std::vector<std::string> >("filePatterns")),
  inprocessDir_(pset.getParameter<std::string>("inprocessDir")),
  processedDir_(pset.getParameter<std::string>("processedDir")),
  corruptedDir_(pset.getParameter<std::string>("corruptedDir")),
  tokenFile_(pset.getUntrackedParameter<std::string>("tokenFile",
                             "watcherSourceToken")),
  timeOut_(pset.getParameter<int>("timeOutInSec")),
  end_(false),
  verbosity_(pset.getUntrackedParameter<int>("verbosity", 0)){
  struct stat buf;
  if(stat(tokenFile_.c_str(), &buf)){
    FILE* f = fopen(tokenFile_.c_str(), "w");
    if(f){
      fclose(f);
    } else{
      throw cms::Exception("WatcherSource") << "Failed to create token file.";
    }
  }
  vector<string> dirs;
  dirs.push_back(inprocessDir_);
  dirs.push_back(processedDir_);
  dirs.push_back(corruptedDir_);
  
  for(unsigned i = 0; i < dirs.size(); ++i){
    const string& dir = dirs[i];
    struct stat fileStat;
    if(0==stat(dir.c_str(), &fileStat)){
      if(!S_ISDIR(fileStat.st_mode)){
    throw cms::Exception("[WatcherSource]")
      << "File " << dir << " exists but is not a directory "
      << " as expected.";
      }
    } else {//directory does not exists, let's try to create it
      if(0!=mkdir(dir.c_str(), 0755)){
    throw cms::Exception("[WatcherSource]")
      << "Failed to create directory " << dir
      << " for writing data.";
      }
    }
  }
}

WatcherStreamFileReader::~WatcherStreamFileReader

(

)

Definition at line 168 of file WatcherStreamFileReader.cc.

                                                 {
}

Member Function Documentation

void WatcherStreamFileReader::closeFile

(

)

Definition at line 397 of file WatcherStreamFileReader.cc.

References asciidump::cmd, gather_cfg::cout, end_, edm::hlt::Exception, fileName_, i, now(), processedDir_, streamerInputFile_, and verbosity_.

Referenced by getNextEvent(), and Vispa.Main.Application.Application::tabCloseRequest().

                                       {
  if(streamerInputFile_.get()==0) return;
  //delete the streamer input file:
  streamerInputFile_.reset();
  stringstream cmd;
  //TODO: validation of processDir
  cmd << "/bin/mv -f \"" << fileName_ << "\" \"" << processedDir_ << "/.\"";
  if(verbosity_) cout << "[WatcherSource " << now() << "]" 
              << " Excuting " << cmd.str() << "\n"; 
  int i = system(cmd.str().c_str());
  if(i!=0){
    throw cms::Exception("WatcherSource")
      << "Failed to move processed file '" << fileName_ << "'"
      << " to processed directory '" << processedDir_ << "'\n";
    //Stop further processing to prevent endless loop:
    end_ = true;
  }
  cout << flush;
}

const InitMsgView * WatcherStreamFileReader::getHeader

(

)

Definition at line 176 of file WatcherStreamFileReader.cc.

References InitMsgView::code(), edm::hlt::Exception, getInputFile(), errorMatrix2Lands::header, Header::INIT, analyzePatCOC_cfg::inputFile, and edm::StreamerInputFile::startMessage().

                                                     {

  edm::StreamerInputFile* inputFile = getInputFile();

  //TODO: shall better send an exception...
  if(inputFile==0){
    throw cms::Exception("WatcherSource") << "No input file found.";
  }
  
  const InitMsgView* header = inputFile->startMessage();
  
  if(header->code() != Header::INIT) //INIT Msg
    throw cms::Exception("readHeader","WatcherStreamFileReader")
      << "received wrong message type: expected INIT, got "
      << header->code() << "\n";
    
  return header;
}

edm::StreamerInputFile * WatcherStreamFileReader::getInputFile

(

)

Definition at line 209 of file WatcherStreamFileReader.cc.

References trackerHits::c, asciidump::cmd, filterCSVwithJSON::copy, corruptedDir_, gather_cfg::cout, alignCSCRings::dest, combineCards::dirname, dt, end_, edm::hlt::Exception, f, convertXMLtoSQLite_cfg::fileName, fileName_, filePatterns_, filesInQueue_, i, inprocessDir_, inputDir_, n, now(), alignCSCRings::s, findQualityFiles::size, stor::utils::sleep(), streamerInputFile_, lumiQTWidget::t, cond::rpcobgas::time, timeOut_, tokenFile_, and verbosity_.

Referenced by getHeader(), getNextEvent(), and newHeader().

                                                           {
  char* lineptr = 0;
  size_t n = 0;
  static stringstream cmd;
  static bool cmdSet = false;
  static char curDir[PATH_MAX>0?PATH_MAX:4096];

  if(!cmdSet){
    cmd.str("");
    cmd << "/bin/ls -rt " << inputDir_ << " | egrep '(";
    //TODO: validate patternDir (see ;, &&, ||) and escape special character
    if(filePatterns_.size()==0) return 0;
    if(getcwd(curDir, sizeof(curDir))==0){
      throw cms::Exception("WatcherSource")
    << "Failed to retreived working directory path: "
    << strerror(errno);
    }
    
    for(unsigned i = 0 ; i < filePatterns_.size(); ++i){
      if(i>0) cmd << "|";
      //     if(filePatterns_[i].size()>0 && filePatterns_[0] != "/"){//relative path
      //       cmd << curDir << "/";
      //     }
      cmd << filePatterns_[i];
    }
    cmd << ")'";
    
    cout << "[WatcherSource " << now() << "]" 
     << " Command to retrieve input files: "
     << cmd.str() << "\n";
    cmdSet = true;
  }

  struct stat buf;
  
  if(stat(tokenFile_.c_str(), &buf)!=0){ 
    end_ = true; 
  }
  
  bool waiting = false;
  static bool firstWait = true;
  timeval waitStart;
  //if no cached input file, look for new files until one is found:
  if(!end_ && streamerInputFile_.get()==0){
    fileName_.assign("");
    
    //check if we have file in the queue, if not look for new files:
    while(filesInQueue_.size()==0){
      if(stat(tokenFile_.c_str(), &buf)!=0){ 
    end_ = true; 
    break;
      }
      FILE* s = popen(cmd.str().c_str(), "r");
      if(s==0){
    throw cms::Exception("WatcherSource")
      << "Failed to retrieve list of input file: " << strerror(errno);
      }
      
      ssize_t len;
      while(!feof(s)){
    if((len=getline(&lineptr, &n, s))>0){
      //remove end-of-line character:
      lineptr[len-1] = 0;
      string fileName;
      if(inputDir_.size()>0 && inputDir_[0] != '/'){//relative path
        fileName.assign(curDir);
        fileName.append("/");
        fileName.append(inputDir_);
      } else{
        fileName.assign(inputDir_);
      }
      fileName.append("/");
      fileName.append(lineptr);
      filesInQueue_.push_back(fileName);
      if(verbosity_) cout << "[WatcherSource " << now() << "]" 
                  << " File to process: '"
                  << fileName << "'\n";
    }
      }
      while(!feof(s)) fgetc(s);
      pclose(s);
      if(filesInQueue_.size()==0){
    if(!waiting){
      cout << "[WatcherSource " << now() << "]" 
           << " No file found. Waiting for new file...\n";
      cout << flush;
      waiting = true;
      gettimeofday(&waitStart, 0);
    } else if(!firstWait){
      timeval t;
      gettimeofday(&t, 0);
      float dt = (t.tv_sec-waitStart.tv_sec) * 1.
        + (t.tv_usec-waitStart.tv_usec) * 1.e-6;
      if((timeOut_ >= 0) && (dt > timeOut_)){
        cout << "[WatcherSource " << now() << "]"
         << " Having waited for new file for " << (int)dt << " sec. "
         << "Timeout exceeded. Exits.\n";
        //remove(tokenFile_.c_str()); //we do not delete the token, otherwise sorting process on the monitoring farm will not be restarted by the runloop.sh script.
        end_ = true;
        break;
      }
    }
      }
      sleep(1);
    } //end of file queue update
    firstWait = false;
    free(lineptr); lineptr=0;
    
    while(streamerInputFile_.get()==0 && !filesInQueue_.empty()){

      fileName_ = filesInQueue_.front();
      filesInQueue_.pop_front();
      int fd = open(fileName_.c_str(), 0);
      if(fd!=0){
    struct stat buf;
    off_t size = -1;
    //check that file transfer is finished, by monitoring its size:
    time_t t = time(0);
    for(;;){
      fstat(fd, &buf);
      if(verbosity_) cout << "file size: " << buf.st_size << ", prev size: "  << size << "\n";
      if(buf.st_size==size) break; else size = buf.st_size;
      if(difftime(t,buf.st_mtime)>60) break; //file older then 1 min=> tansfer must be finished
      sleep(1);
    }

    if(fd!=0 && buf.st_size == 0){//file is empty. streamer reader 
      //                   does not like empty file=> skip it
      stringstream c;
      c << "/bin/mv -f \"" << fileName_ << "\" \"" << corruptedDir_
        << "/.\"";
      if(verbosity_) cout << "[WatcherSource " << now() << "]" 
                  << " Excuting "
                  << c.str() << "\n"; 
      int i = system(c.str().c_str());
      if(i!=0){
        //throw cms::Exception("WatcherSource")
        cout << "[WatcherSource " << now() << "] "
         << "Failed to move empty file '" << fileName_ << "'"
         << " to corrupted directory '" << corruptedDir_ << "'\n";
      }
      continue;
    }
    
    close(fd);

    vector<char> buf1(fileName_.size()+1);
    copy(fileName_.begin(), fileName_.end(), buf1.begin());
    buf1[buf1.size()-1] = 0;
    
    vector<char> buf2(fileName_.size()+1);
    copy(fileName_.begin(), fileName_.end(), buf2.begin());
    buf2[buf1.size()-1] = 0;
    
    string dirnam(dirname(&buf1[0]));
    string filenam(basename(&buf2[0]));
    
    string dest  = inprocessDir_ + "/" + filenam;
    
    if(verbosity_) cout << "[WatcherSource " << now() << "]" 
                << " Moving file "
                << fileName_ << " to " << dest << "\n";
    
    if(0!=rename(fileName_.c_str(), dest.c_str())){
      throw cms::Exception("WatcherSource")
        << "Failed to move file '" << fileName_ << "' "
        << "to processing directory " << inprocessDir_
        << ": " << strerror(errno);
    }
    
    fileName_ = dest;

    cout << "[WatcherSource " << now() << "]" 
         << " Opening file " << fileName_ << "\n" << flush;
    streamerInputFile_
      = auto_ptr<edm::StreamerInputFile>(new edm::StreamerInputFile(fileName_));

    ofstream f(".watcherfile");
    f << fileName_; 
      } else{
    cout << "[WatcherSource " << now() << "]" 
         << " Failed to open file " << fileName_ << endl;
      }
    } //loop on file queue to find one file which opening succeeded
  }
  return streamerInputFile_.get();
}

const EventMsgView * WatcherStreamFileReader::getNextEvent

(

)

Definition at line 195 of file WatcherStreamFileReader.cc.

References closeFile(), edm::StreamerInputFile::currentRecord(), end_, getInputFile(), analyzePatCOC_cfg::inputFile, and edm::StreamerInputFile::next().

                                                         {
  if(end_){ closeFile(); return 0;}
  
  edm::StreamerInputFile* inputFile;

  //go to next input file, till no new event is found
  while((inputFile=getInputFile())!=0
    && inputFile->next()==0){
    closeFile();
  }

  return inputFile==0?0:inputFile->currentRecord();
}

const bool WatcherStreamFileReader::newHeader

(

)

Definition at line 171 of file WatcherStreamFileReader.cc.

References getInputFile(), analyzePatCOC_cfg::inputFile, and edm::StreamerInputFile::newHeader().

                                              {
  edm::StreamerInputFile* inputFile = getInputFile();
  return inputFile?inputFile->newHeader():false;
}

Member Data Documentation

std::string WatcherStreamFileReader::corruptedDir_

private

Directory where file must be moved if file is unreadble (e.g empty size)

Definition at line 59 of file WatcherStreamFileReader.h.

Referenced by getInputFile(), and WatcherStreamFileReader().

bool WatcherStreamFileReader::end_

private

Definition at line 73 of file WatcherStreamFileReader.h.

Referenced by closeFile(), getInputFile(), and getNextEvent().

std::string WatcherStreamFileReader::fileName_

staticprivate

Definition at line 65 of file WatcherStreamFileReader.h.

Referenced by closeFile(), and getInputFile().

std::vector<std::string> WatcherStreamFileReader::filePatterns_

private

Streamer file name pattern list

Definition at line 46 of file WatcherStreamFileReader.h.

Referenced by getInputFile().

std::deque<std::string> WatcherStreamFileReader::filesInQueue_

private

Definition at line 71 of file WatcherStreamFileReader.h.

Referenced by getInputFile().

std::string WatcherStreamFileReader::inprocessDir_

private

Directory where file are moved during processing

Definition at line 50 of file WatcherStreamFileReader.h.

Referenced by getInputFile(), and WatcherStreamFileReader().

std::string WatcherStreamFileReader::inputDir_

private

Directory to look for streamer files

Definition at line 42 of file WatcherStreamFileReader.h.

Referenced by getInputFile().

std::string WatcherStreamFileReader::processedDir_

private

Directory where file must be moved once processed

Definition at line 55 of file WatcherStreamFileReader.h.

Referenced by closeFile(), and WatcherStreamFileReader().

std::auto_ptr<edm::StreamerInputFile> WatcherStreamFileReader::streamerInputFile_

private

Cached input file stream

Definition at line 63 of file WatcherStreamFileReader.h.

Referenced by closeFile(), and getInputFile().

int WatcherStreamFileReader::timeOut_

private

Definition at line 69 of file WatcherStreamFileReader.h.

Referenced by getInputFile().

std::string WatcherStreamFileReader::tokenFile_

private

Definition at line 67 of file WatcherStreamFileReader.h.

Referenced by getInputFile(), and WatcherStreamFileReader().

int WatcherStreamFileReader::verbosity_

private

Definition at line 75 of file WatcherStreamFileReader.h.

Referenced by closeFile(), and getInputFile().