public override Stream GetFragment(string id, string contentType)
{
// need to see which definition we match
ResourcePublishingDefinition definition = null;
UriTemplateMatch match = null;
foreach (var resourcePublishingDefinition in _publishingDefinitions)
{
var newuri = new Uri(id);
match = resourcePublishingDefinition.UriTemplate.Match(resourcePublishingDefinition.ResourcePrefix, newuri);
if (match != null)
{
definition = resourcePublishingDefinition;
break;
}
}
if (definition == null) { throw new Exception("Unable to find matching definition for uri " + id); }
var sb = new StringBuilder();
foreach (var generationDefinition in definition.FragmentGenerationDefinitions)
{
try
{
var data = ExecuteQuery(_dataSourceConnectionString, generationDefinition.FragmentQuery.Replace("[[id]]", match.BoundVariables["id"]));
foreach (DataRow row in data.Rows)
{
var dra = new DbDataRow(row);
foreach (var line in generationDefinition.RdfTemplateLines)
{
var linePattern = new NTripleLinePattern(line);
linePattern.GenerateNTriples(sb, dra, generationDefinition.GenericTemplateExcludeColumns, contentType.Equals("xml"));
}
}
}
catch (Exception ex)
{
Logging.LogError(1, "Error processing definition {0} {1} {2} {3}", ex.Message, generationDefinition.SnapshotQuery, _dataSourceConnectionString, ex.StackTrace);
}
}
try
{
var g = new Graph();
var parser = new NTriplesParser(TokenQueueMode.SynchronousBufferDuringParsing);
var triplesStr = sb.ToString();
parser.Load(g, new StringReader(triplesStr));
if (contentType.Equals("xml"))
{
var ms = new MemoryStream();
var sw = new StreamWriter(ms, Encoding.UTF8);
var rdfxmlwriter = new RdfXmlWriter();
var strw = new System.IO.StringWriter();
rdfxmlwriter.Save(g, strw);
var data = strw.ToString();
data = data.Replace("~~~2B~~~", "%2B");
data = data.Replace("~~~SLASH~~~", "%2F");
data = data.Replace("utf-16", "utf-8");
sw.Write(data);
sw.Flush();
ms.Seek(0, SeekOrigin.Begin);
return ms;
}
else
{
var ms = new MemoryStream();
var sw = new StreamWriter(ms);
sw.Write(triplesStr);
sw.Flush();
ms.Seek(0, SeekOrigin.Begin);
return ms;
}
}
catch (Exception ex)
{
Logging.LogError(1, "Error getting fragment {0} {1}", ex.Message, ex.StackTrace);
throw;
}
}
public override Stream GetSnapshot(string id, string contentType)
{
Logging.LogInfo("GetSnapshot for " + id);
var tmpFileName = ConfigurationReader.Configuration.HashValueStorageLocation + Path.DirectorySeparatorChar + Guid.NewGuid();
Logging.LogInfo("Writing to file " + tmpFileName);
try {
using (var fs = new FileStream(tmpFileName, FileMode.Create))
{
var sb = new StringBuilder();
foreach (var definition in _publishingDefinitions)
{
foreach (var generationDefinition in definition.FragmentGenerationDefinitions)
{
try
{
using (var connection = new OdbcConnection(_dataSourceConnectionString))
{
connection.Open();
var odbcCommand = new OdbcCommand(generationDefinition.SnapshotQuery)
{
Connection = connection,
CommandTimeout = 0
};
var dr = odbcCommand.ExecuteReader();
var schema = dr.GetSchemaTable();
var columnNames = (from DataRow row in schema.Rows select row[0].ToString().ToLower()).ToList();
var flushCount = 0;
var drAdaptor = new DbReaderDataRow(dr, columnNames);
while (dr.Read())
{
try
{
flushCount++;
foreach (var line in generationDefinition.RdfTemplateLines)
{
var pattern = new NTripleLinePattern(line);
pattern.GenerateNTriples(sb, drAdaptor, generationDefinition.GenericTemplateExcludeColumns, false);
}
}
catch (Exception dataex)
{
Logging.LogError(1, "Error Processing Data Line in " + generationDefinition.SnapshotQuery + " : " + dataex.Message);
}
if (flushCount >= 1000)
{
try
{
var sw = new StreamWriter(fs);
sw.Write(sb.ToString());
sw.Flush();
sb = new StringBuilder();
}
catch (Exception ex)
{
var msg = ex.Message;
Logging.LogError(1, "Error exporting triples " + msg + " " + ex.StackTrace);
}
}
}
if (flushCount >= 0)
{
try
{
var sw = new StreamWriter(fs);
sw.Write(sb.ToString());
sw.Flush();
sb = new StringBuilder();
}
catch (Exception ex)
{
var msg = ex.Message;
Logging.LogError(1, "Error exporting triples " + msg + " " + ex.StackTrace);
}
}
dr.Close();
connection.Close();
}
}
catch (Exception ext)
{
Logging.LogError(1, "Error processing definition {0} {1} {2} {3}", ext.Message, generationDefinition.SnapshotQuery, _dataSourceConnectionString, ext.StackTrace);
}
}
}
}
}
catch (Exception ex)
{
Logging.LogError(1, "Exception getting snapshot " + ex.Message + " " + ex.StackTrace);
}
return(new FileStream(tmpFileName, FileMode.Open));
}
public override Stream GetSnapshot(string id, string contentType)
{
Logging.LogInfo("GetSnapshot for " + id);
var tmpFileName = ConfigurationReader.Configuration.HashValueStorageLocation + Path.DirectorySeparatorChar + Guid.NewGuid();
Logging.LogInfo("Writing to file " + tmpFileName);
try {
using (var fs = new FileStream(tmpFileName, FileMode.Create))
{
var sb = new StringBuilder();
foreach (var definition in _publishingDefinitions)
{
foreach (var generationDefinition in definition.FragmentGenerationDefinitions)
{
try
{
using (var connection = new OdbcConnection(_dataSourceConnectionString))
{
connection.Open();
var odbcCommand = new OdbcCommand(generationDefinition.SnapshotQuery)
{
Connection = connection,
CommandTimeout = 0
};
var dr = odbcCommand.ExecuteReader();
var schema = dr.GetSchemaTable();
var columnNames = (from DataRow row in schema.Rows select row[0].ToString().ToLower()).ToList();
var flushCount = 0;
var drAdaptor = new DbReaderDataRow(dr, columnNames);
while (dr.Read())
{
try
{
flushCount++;
foreach (var line in generationDefinition.RdfTemplateLines)
{
var pattern = new NTripleLinePattern(line);
pattern.GenerateNTriples(sb, drAdaptor, generationDefinition.GenericTemplateExcludeColumns, false);
}
}
catch (Exception dataex)
{
Logging.LogError(1, "Error Processing Data Line in " + generationDefinition.SnapshotQuery + " : " + dataex.Message);
}
if (flushCount >= 1000)
{
try
{
var sw = new StreamWriter(fs);
sw.Write(sb.ToString());
sw.Flush();
sb = new StringBuilder();
}
catch (Exception ex)
{
var msg = ex.Message;
Logging.LogError(1, "Error exporting triples " + msg + " " + ex.StackTrace);
}
}
}
if (flushCount >= 0)
{
try
{
var sw = new StreamWriter(fs);
sw.Write(sb.ToString());
sw.Flush();
sb = new StringBuilder();
}
catch (Exception ex)
{
var msg = ex.Message;
Logging.LogError(1, "Error exporting triples " + msg + " " + ex.StackTrace);
}
}
dr.Close();
connection.Close();
}
}
catch (Exception ext)
{
Logging.LogError(1, "Error processing definition {0} {1} {2} {3}", ext.Message, generationDefinition.SnapshotQuery, _dataSourceConnectionString, ext.StackTrace);
}
}
}
}
}
catch (Exception ex)
{
Logging.LogError(1, "Exception getting snapshot " + ex.Message + " " + ex.StackTrace);
}
return new FileStream(tmpFileName, FileMode.Open);
}
public override Stream GetFragment(string id, string contentType)
{
// need to see which definition we match
ResourcePublishingDefinition definition = null;
UriTemplateMatch match = null;
foreach (var resourcePublishingDefinition in _publishingDefinitions)
{
var newuri = new Uri(id);
match = resourcePublishingDefinition.UriTemplate.Match(resourcePublishingDefinition.ResourcePrefix, newuri);
if (match != null)
{
definition = resourcePublishingDefinition;
break;
}
}
if (definition == null)
{
throw new Exception("Unable to find matching definition for uri " + id);
}
var sb = new StringBuilder();
foreach (var generationDefinition in definition.FragmentGenerationDefinitions)
{
try
{
var data = ExecuteQuery(_dataSourceConnectionString, generationDefinition.FragmentQuery.Replace("[[id]]", match.BoundVariables["id"]));
foreach (DataRow row in data.Rows)
{
var dra = new DbDataRow(row);
foreach (var line in generationDefinition.RdfTemplateLines)
{
var linePattern = new NTripleLinePattern(line);
linePattern.GenerateNTriples(sb, dra, generationDefinition.GenericTemplateExcludeColumns, contentType.Equals("xml"));
}
}
}
catch (Exception ex)
{
Logging.LogError(1, "Error processing definition {0} {1} {2} {3}", ex.Message, generationDefinition.SnapshotQuery, _dataSourceConnectionString, ex.StackTrace);
}
}
try
{
var g = new Graph();
var parser = new NTriplesParser(TokenQueueMode.SynchronousBufferDuringParsing);
var triplesStr = sb.ToString();
parser.Load(g, new StringReader(triplesStr));
if (contentType.Equals("xml"))
{
var ms = new MemoryStream();
var sw = new StreamWriter(ms, Encoding.UTF8);
var rdfxmlwriter = new RdfXmlWriter();
var strw = new System.IO.StringWriter();
rdfxmlwriter.Save(g, strw);
var data = strw.ToString();
data = data.Replace("~~~2B~~~", "%2B");
data = data.Replace("~~~SLASH~~~", "%2F");
data = data.Replace("utf-16", "utf-8");
sw.Write(data);
sw.Flush();
ms.Seek(0, SeekOrigin.Begin);
return(ms);
}
else
{
var ms = new MemoryStream();
var sw = new StreamWriter(ms);
sw.Write(triplesStr);
sw.Flush();
ms.Seek(0, SeekOrigin.Begin);
return(ms);
}
}
catch (Exception ex)
{
Logging.LogError(1, "Error getting fragment {0} {1}", ex.Message, ex.StackTrace);
throw;
}
}
