Help building the logic for a script Post: 302212801

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Top Forums Shell Programming and Scripting Help building the logic for a script Post 302212801 by quine on Tuesday 8th of July 2008 11:28:28 AM

07-08-2008

Registered User

So the essence of the problem is that when a USE for the credit (the "success" message) for a particular msisdn, you want to record all the "line" information for that msisdn. But the USE record comes AFTER the recording record. Is that the core of it?

I have a few questions...

1) Is this all being recorded moment by moment in one file like a log, or are the "USE" records in a separate file?

2) It makes sense that if there is a USE record where there has been no line record it would be an error.

3) Can you get two "line records" with the same msisdn without a USE record in between? If yes, you must account for this. How about the reverse? Two or mor uses for each recording? Either that is an error too, or you add up the credits or something, etc.

4) What happens if a line record never gets used? That is, how long do you hold (store) un-used "line records" before they become errors (if they ever do)?

I would start by storing the "line records" in a hash (perl). Basically you read along this file and every time you encounter a "line record" you store it using the msisdn as the index of the hash. As you come across a USE record (I'm assuming one log file here that is growing was you are reading it), you look for it's msisdn already in the hash (exists() in perl). If found, you have the line data as the value of the hash, and you can DELETE that value from the hash since it is accounted for, etc. That would be one way to approach it. If you don't have hashes, you will have to use an array, search it, etc. So long as the number of un-used line records stays low, performance shouldn't degrade.

quine

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LEARN ABOUT DEBIAN

lire::dlfstream

DlfStream(3pm)						  LogReport's Lire Documentation					    DlfStream(3pm)

NAME

       Lire::DlfStream - Interface to DLF data stream

SYNOPSIS

	 use Lire::DlfStore;

	 my $store = Lire::DlfStore->open( "mystore" );
	 my $dlf_stream = $store->open_dlf_stream( "www", "r" );

	 print "Data begins on ", scalar localtime $dlf_stream->start_time(), "
";
	 print "Data ends on   ", scalar localtime $dlf_stream->end_time(), "
";
	 while ( my $dlf = $dlf_stream->read_dlf() ) {
	   ...
	 }

DESCRIPTION

       This object encapsulates DLF stream.

   name
       Returns the schema's name of the DlfStream.

   mode()
       Returns the mode in which the DlfStream was opened.

   sort_spec()
       Returns the sort specification that is set on the stream.

   close()
       This method should be called when the Lire::DlfStream isn't needed anymore, otherwise the same DlfStream cannot be opened until then.

   nrecords()
       Returs the number of DLF records in the stream.

   start_time()
       Returns the timestamp of the oldest DLF record in the stream in seconds since the epoch.

   end_time()
       Returns the timestamp of the newest DLF record in the stream in seconds since the epoch.

   read_dlf()
       Returns an hash reference containing the next DLF record in the stream. It returns undef once the end of the stream is reached.

       This method will throw an exception if the DlfStream isn't open in 'r' mode or if there is an error reading the DLF record.

   read_dlf_aref()
       Returns the next DLF record in the stream as an array reference. The fields are in the order specified by the schema.

       This method will throw an exception if the DlfStream isn't open in 'r' mode or if there is an error reading the DLF record.

   write_dlf( $dlf, [ $link_ids ] )
       Writes the fields contained in the hash ref $dlf to the DLF stream.

       This method will throw an exception if there is an error writing the DLF record or if the stream isn't opened in 'w' mode.

       The $link_ids parameter is used when the stream's schema is a Lire::DerivedSchema. It should be an array reference containing the DLF ids
       of the records which are linked to this record.

   clean( [ $time ] )
       This method will remove all DLF records older than $time. It $time is omitted, all Dlf records will be removed.

Lire 2.1.1							    2006-07-23							    DlfStream(3pm)