public EsentCrawlerHistoryService(string basePath, Uri baseUri, bool resume)
{
this.m_Resume = resume;
this.m_DatabaseFileName = Path.GetFullPath(
Path.Combine(basePath, "NCrawlHist{0}\\Hist.edb".FormatWith(baseUri.GetHashCode())));
if (!resume)
{
this.ClearHistory();
}
this.m_EsentInstance = new EsentInstance(this.m_DatabaseFileName, (session, dbid) =>
{
EsentTableDefinitions.CreateGlobalsTable(session, dbid);
EsentTableDefinitions.CreateHistoryTable(session, dbid);
});
// Get columns
this.m_EsentInstance.Cursor((session, dbid) =>
{
Api.JetGetColumnInfo(session, dbid, EsentTableDefinitions.GlobalsTableName,
EsentTableDefinitions.GlobalsCountColumnName, out this.historyCountColumn);
Api.JetGetColumnInfo(session, dbid, EsentTableDefinitions.HistoryTableName,
EsentTableDefinitions.HistoryTableUrlColumnName, out this.historyUrlColumn);
});
}
public EsentCrawlQueueService(string basePath, Uri baseUri, bool resume)
{
this.m_DatabaseFileName = Path.GetFullPath(
Path.Combine(basePath, "NCrawlQueue{0}\\Queue.edb".FormatWith(baseUri.GetHashCode())));
if (!resume && File.Exists(this.m_DatabaseFileName))
{
ClearQueue();
}
this.m_EsentInstance = new EsentInstance(this.m_DatabaseFileName, (session, dbid) =>
{
EsentTableDefinitions.CreateGlobalsTable(session, dbid);
EsentTableDefinitions.CreateQueueTable(session, dbid);
});
// Get columns
this.m_EsentInstance.Cursor((session, dbid) =>
{
Api.JetGetColumnInfo(session, dbid, EsentTableDefinitions.GlobalsTableName,
EsentTableDefinitions.GlobalsCountColumnName,
out this.queueCountColumn);
Api.JetGetColumnInfo(session, dbid, EsentTableDefinitions.QueueTableName,
EsentTableDefinitions.QueueTableDataColumnName,
out this.dataColumn);
});
}