public DataFileExporter(SourceQueryParameters source, DataFileBase destination)
{
InitializeMembers();
this.source = source;
this.destination = destination;
}
public DataFileImporter(DataFileBase source, DestinationTableParameters destination)
: base(destination)
{
InitializeMembers();
this.source = source;
}
internal FileDataReader(DataFileBase parent)
{
InizializeMembers();
this.parent = parent;
NextResult();
}
internal FileDataReader(DataFileBase parent)
{
InizializeMembers();
this.parent = parent;
NextResult();
}
private void InizializeMembers()
{
this.parent = null;
this.columnIndex = null;
this.blockCounter = -1;
this.rowCounter = -1;
this.rowValues = null;
this.isIdentity = null;
}
private void CopyMembers(DataFileBlockBase old)
{
this.file = old.file;
// Deep copy columns
this.columns = new List <Column>();
foreach (var c in old.columns)
{
this.columns.Add((Column)c.Clone());
}
}
public JobInstance ScheduleAsJob(Federation federation, TableOrView[] sources, string path, FileFormatDescription format, string queueName, string comments)
{
var job = GetInitializedJobInstance(queueName, comments);
var settings = new ExportTablesJobSettings(job.JobDefinition.Settings);
path = path ?? settings.OutputDirectory;
path = Path.Combine(path, String.Format("{0}_{1}{2}", Context.UserName, job.JobID, Jhu.Graywulf.IO.Constants.FileExtensionZip));
var destinations = new DataFileBase[sources.Length];
for (int i = 0; i < sources.Length; i++)
{
var ff = FileFormatFactory.Create(federation.FileFormatFactory);
var destination = ff.CreateFile(format);
destination.Uri = Util.UriConverter.FromFilePath(String.Format("{0}{1}", sources[i].ObjectName, format.DefaultExtension));
// special initialization in case of a text file
// TODO: move this somewhere else, maybe web?
if (destination is TextDataFileBase)
{
var tf = (TextDataFileBase)destination;
tf.Encoding = Encoding.ASCII;
tf.Culture = System.Globalization.CultureInfo.InvariantCulture;
tf.GenerateIdentityColumn = false;
tf.ColumnNamesInFirstLine = true;
}
destinations[i] = destination;
}
var et = new ExportTables()
{
Sources = sources,
Destinations = destinations,
Archival = DataFileArchival.Zip,
Uri = Util.UriConverter.FromFilePath(path),
FileFormatFactoryType = federation.FileFormatFactory,
StreamFactoryType = federation.StreamFactory,
};
job.Parameters["Parameters"].Value = et;
return job;
}
private void CopyMembers(DataFileBase old)
{
this.baseStream = null;
this.ownsBaseStream = false;
this.fileMode = old.fileMode;
this.uri = old.uri;
this.generateIdentityColumn = old.generateIdentityColumn;
// Deep copy of blocks
this.blocks = new List <DataFileBlockBase>();
foreach (var b in old.blocks)
{
var nb = (DataFileBlockBase)b.Clone();
this.blocks.Add((DataFileBlockBase)b.Clone());
}
this.blockCounter = -1;
}
protected DataFileBase(DataFileBase old)
{
CopyMembers(old);
}
public void Dispose()
{
this.parent = null;
this.columnIndex = null;
}
private void InizializeMembers()
{
this.parent = null;
this.columnIndex = null;
this.blockCounter = -1;
this.rowCounter = -1;
this.rowValues = null;
this.isIdentity = null;
}
private void CopyMembers(DataFileBlockBase old)
{
this.file = old.file;
// Deep copy columns
this.columns = new List<Column>();
foreach (var c in old.columns)
{
this.columns.Add((Column)c.Clone());
}
}
private void InitializeMembers(StreamingContext context)
{
//this.databaseInstanceName = String.Empty;
//this.schemaName = null;
//this.datasetName = null;
//this.databaseName = null;
//this.tableName = null;
this.source = null;
this.destination = null;
}
private void InitializeMembers()
{
this.file = null;
this.columns = new List <Column>();
}
private void InitializeMembers()
{
this.file = null;
this.dataReader = null;
}
private void InitializeMembers()
{
this.file = null;
this.dataReader = null;
}
private void CopyMembers(DataFileBlockBase old)
{
this.file = old.file;
this.columns = new List<DataFileColumn>(old.columns);
}
private void InitializeMembers()
{
this.source = null;
}
public FileCommand(DataFileBase file)
{
InitializeMembers();
this.file = file;
}
private void WriteTable(IDbCommand cmd, DataFileBase destination)
{
// Wrap command into a cancellable task
var guid = Guid.NewGuid();
var ccmd = new CancelableDbCommand(cmd);
RegisterCancelable(guid, ccmd);
// Pass data reader to the file formatter
ccmd.ExecuteReader(dr =>
{
destination.WriteFromDataReader(dr);
});
UnregisterCancelable(guid);
}
protected void WriteTable(SourceTableQuery source, DataFileBase destination)
{
// Create command that reads the table
using (var cmd = source.CreateCommand())
{
using (var cn = source.OpenConnection())
{
using (var tn = cn.BeginTransaction(IsolationLevel.ReadUncommitted))
{
cmd.Connection = cn;
cmd.Transaction = tn;
cmd.CommandTimeout = Timeout;
WriteTable(cmd, destination);
}
}
}
}
protected void ReadTable(DataFileBase source, DestinationTable destination)
{
// Import the file by wrapping it into a dummy command
using (var cmd = new FileCommand(source))
{
ImportTable(cmd, destination);
}
}
public DataFileBlockBase(DataFileBase file)
{
InitializeMembers();
this.file = file;
}
public FileCommand(DataFileBase file)
{
InitializeMembers();
this.file = file;
}
protected DataFileBase(DataFileBase old)
{
CopyMembers(old);
}
public DataFileBlockBase(DataFileBase file)
{
InitializeMembers();
this.file = file;
}
private void InitializeMembers()
{
this.source = null;
this.destination = null;
}
public void Dispose()
{
this.parent = null;
this.columnIndex = null;
}
private void CopyMembers(DataFileBase old)
{
this.baseStream = null;
this.ownsBaseStream = false;
this.fileMode = old.fileMode;
this.uri = old.uri;
this.generateIdentityColumn = old.generateIdentityColumn;
// Deep copy of blocks
this.blocks = new List<DataFileBlockBase>();
foreach (var b in old.blocks)
{
var nb = (DataFileBlockBase)b.Clone();
this.blocks.Add((DataFileBlockBase)b.Clone());
}
this.blockCounter = -1;
}
private void InitializeMembers()
{
this.file = null;
this.columns = new List<DataFileColumn>();
}
private void CopyMembers(ExportTable old)
{
this.source = old.source;
this.destination = old.destination;
}
