public void IrbisConnection_PushDatabase_1()
{
IrbisConnection connection = new IrbisConnection();
connection.ParseConnectionString(ConnectionString);
const string ibis = "IBIS";
const string rdr = "RDR";
Assert.AreEqual(ibis, connection.Database);
Assert.AreEqual(ibis, connection.PushDatabase(rdr));
Assert.AreEqual(rdr, connection.PopDatabase());
Assert.AreEqual(ibis, connection.Database);
}
static void Main()
{
try
{
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
Threshold = new DateTime(DateTime.Today.Year, 1, 1);
string thresholdString = CM.AppSettings["threshold"];
if (!string.IsNullOrEmpty(thresholdString))
{
Threshold = DateTime.Parse(thresholdString);
}
TailDb = CM.AppSettings["tail-db"];
int total = 0;
int cropped = 0;
string connectionString = CM.AppSettings["connection-string"];
using (IrbisConnection connection
= new IrbisConnection(connectionString))
{
int[] mfns = connection.Search
(
"RI=$"
);
const int delta = 1000;
for (int i = 0; i < mfns.Length; i += delta)
{
int[] sub = mfns
.Skip(i)
.Take(delta)
.ToArray();
MarcRecord[] records = connection.ReadRecords
(
connection.Database,
sub
);
foreach (MarcRecord record in records)
{
if (record.Deleted)
{
continue;
}
total++;
Console.WriteLine("ELAPSED: {0}", FormatSpan(stopwatch.Elapsed));
ReaderInfo reader = ReaderInfo.Parse(record);
Console.WriteLine(reader);
VisitInfo[] visits = record
.Fields
.GetField(40)
.Select(VisitInfo.Parse)
.Where(loan => loan.IsVisit ||
loan.IsReturned)
.ToArray();
VisitInfo[] old = visits
.Where(visit => visit.DateGiven < Threshold)
.ToArray();
Console.WriteLine("VISITS TOTAL: {0}", visits.Length);
Console.WriteLine("VISITS TO DELETE: {0}", old.Length);
if (old.Length != 0)
{
if (!string.IsNullOrEmpty(TailDb))
{
connection.PushDatabase(TailDb);
int[] tailMfns = new int[0];
try
{
tailMfns = connection.Search("\"RI={0}\"", reader.Ticket);
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
MarcRecord copy;
if (tailMfns.Length != 0)
{
copy = connection.ReadRecord(tailMfns[0]);
Console.WriteLine("USING OLD RECORD {0}", tailMfns[0]);
}
else
{
copy = new MarcRecord();
RecordField[] non40 = record
.Fields
.Where(field => field.Tag != 40)
.ToArray();
copy.Fields.AddRange(non40);
Console.WriteLine("COPY CREATED");
}
RecordField[] old40 = old.Select(loan => loan.Field).ToArray();
copy.Fields.AddRange(old40);
try
{
connection.WriteRecord(copy, false, true);
}
catch (Exception ex)
{
Console.WriteLine("CAN'T WRITE COPY, SKIP");
Debug.WriteLine(ex);
continue;
}
finally
{
connection.PopDatabase();
}
Console.WriteLine("COPY WRITTEN");
}
MarcRecord r2;
try
{
r2 = connection.ReadRecord(record.Mfn);
}
catch (Exception ex)
{
Console.WriteLine("CAN'T REREAD RECORD, SKIP");
Debug.WriteLine(ex);
continue;
}
RecordField[] toDelete = r2
.Fields
.GetField(40)
.Select(VisitInfo.Parse)
.Where(loan => loan.IsVisit || loan.IsReturned)
.Where(visit => visit.DateGiven < Threshold)
.Select(visit => visit.Field)
.ToArray();
foreach (RecordField field in toDelete)
{
r2.Fields.Remove(field);
}
try
{
connection.WriteRecord(r2, false, true);
}
catch (Exception ex)
{
Console.WriteLine("CAN'T WRITE MODIFIED RECORD, SKIP");
Debug.WriteLine(ex);
continue;
}
Console.WriteLine("RECORD WRITTEN");
cropped++;
}
Console.WriteLine(new string('=', 60));
}
}
}
stopwatch.Stop();
Console.WriteLine("TOTAL={0}", total);
Console.WriteLine("CROPPED={0}", cropped);
Console.WriteLine("ELAPSED={0}", FormatSpan(stopwatch.Elapsed));
}
catch (Exception exception)
{
Console.WriteLine(exception);
}
}