example3()

void example3

(

)

Definition at line 127 of file example++.cc.

References example3sub1().

Referenced by main().

{
  libtime::TAbsoluteTime first("2000/12/8 9:35:1.2671"),
                      reqstart("2000/12/8 12:37:14"),
                        reqend("2000/12/8 12:43:52"),
                        exstart, exend;
  libtime::TRelativeTime interval(0,0,0,0,5), reqspan, exspan;

  cout << "\n"
       << "Example 3: Serving a data request\n"
       << "----------\n"
       << "\n";

  cout << "  Imagine that you might have a database file that starts\n"
       << "  with a first sample at "
       << std::string(first) << ".\n"
       << "  A client requests a time series that should start at\n"
       << "  " << std::string(reqstart) << " and end at "
       << "  " << std::string(reqend) << ".\n"
       << "  The sampling interval is " << std::string(interval) << endl;

  long int offset1=(reqstart-first)/interval;
  long int offset2=(reqend-first)/interval;
  exstart=first+interval*(offset1);
  exend=first+interval*(offset2);
  reqspan=reqend-reqstart;
  exspan=exend-exstart;
  
  cout << "  The requested time span is "
       << std::string(reqspan) << endl;

  cout << "\n"
       << "  The client will receive a data segment from offset "
       << offset1 << " to " << offset2 << ".\n";

  cout << "  The segment's first sample is at " << std::string(exstart) << "\n"
       << "  and it's last one is at " << std::string(exend) << endl;

  example3sub1("the first requested sample",
               "the first delivered sample",
               reqstart, exstart, interval);

  example3sub1("the last requested sample",
               "the last delivered sample",
               reqend, exend, interval);

  example3sub1("the first requested sample",
               "the sample before the first delivered one",
               reqstart, exstart-interval, interval);

  example3sub1("the first requested sample",
               "the sample after the first delivered one",
               reqstart, exstart+interval, interval);

}

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