/// <summary>
/// Initializes a new instance of the <see cref="Scanner" /> class.
/// </summary>
/// <param name="tableName">The HBase table name.</param>
/// <param name="resource">The resource.</param>
/// <param name="stargate">The current Stargate.</param>
public Scanner(string tableName, string resource, IStargate stargate)
{
_cachedResults = new List <CellSet>();
_stargate = stargate;
Table = tableName;
Resource = resource;
}
private static void DemonstrateWriting(IStargate stargate)
{
// update a single cell value:
stargate.WriteValue("100", "access-logs", "elton|jericho|201510", "t", "2908");
Console.WriteLine("Updated single cell");
// set multiple cell values:
var update = new Cell(new Identifier
{
Row = "elton|jericho|201510",
CellDescriptor = new HBaseCellDescriptor
{
Column = "t",
Qualifier = "2908"
}
}, "120");
var insert = new Cell(new Identifier
{
Row = "elijah|jericho|201511",
CellDescriptor = new HBaseCellDescriptor
{
Column = "t",
Qualifier = "1117"
}
}, "360");
var cells = new CellSet(new Cell[] { update, insert });
cells.Table = "access-logs";
stargate.WriteCells(cells);
Console.WriteLine("Updated multiple cells");
}
/// <summary>
/// Initializes a new instance of the <see cref="Scanner" /> class.
/// </summary>
/// <param name="tableName">The HBase table name.</param>
/// <param name="resource">The resource.</param>
/// <param name="stargate">The current Stargate.</param>
public Scanner(string tableName, string resource, IStargate stargate)
{
_cachedResults = new List<CellSet>();
_stargate = stargate;
Table = tableName;
Resource = resource;
}
private static void DemonstrateReading(IStargate stargate)
{
// reading data for one row:
var value = stargate.ReadValue("access-logs", "elton|jericho|201511", "t", "1106");
Console.WriteLine("Single cell value: " + value);
var cellSet = stargate.FindCells("access-logs", "elton|jericho|201511");
value = cellSet.First(x => x.Identifier.CellDescriptor.Qualifier == "1106").Value;
Console.WriteLine("LINQed cell value: " + value);
}
public static void BootstrapSchema(this IStargate client)
{
var tables = client.GetTableNames();
if (!tables.Contains("mail"))
{
client.CreateTable(new TableSchema
{
Name = "mail",
Columns = new List <ColumnSchema>
{
new ColumnSchema
{
Name = "m"
}
}
});
}
}
private static void DemonstrateScanning(IStargate stargate)
{
// scanning rows:
var options = new ScannerOptions
{
TableName = "access-logs",
StartRow = "elton|jericho|201510",
StopRow = "elton|jericho|x",
};
var scanner = stargate.CreateScanner(options);
var totalUsage = 0;
while (scanner.MoveNext())
{
var cells = scanner.Current;
foreach (var cell in cells)
{
totalUsage += int.Parse(cell.Value);
}
}
Console.WriteLine("Sum from row scan: " + totalUsage);
// scanning with a filter:
options = new ScannerOptions
{
TableName = "access-logs",
StartRow = "elton|jericho|201510",
StopRow = "elton|jericho|x",
Filter = new ColumnPrefixFilter("11")
};
scanner = stargate.CreateScanner(options);
totalUsage = 0;
while (scanner.MoveNext())
{
var cells = scanner.Current;
foreach (var cell in cells)
{
totalUsage += int.Parse(cell.Value);
}
}
Console.WriteLine("Sum from filtered row scan: " + totalUsage);
}
public MailTable(IStargate client)
{
_client = client;
}
/// <summary>
/// Deletes the item with matching values from HBase.
/// </summary>
/// <param name="gate">The gate.</param>
/// <param name="table">The table.</param>
/// <param name="row">The row.</param>
/// <param name="column">The column.</param>
/// <param name="qualifier">The qualifier.</param>
/// <param name="timestamp">The timestamp.</param>
public static void DeleteItem(this IStargate gate, string table, string row, string column = null, string qualifier = null, long?timestamp = null)
{
gate.DeleteItem(BuildIdentifier(table, row, column, qualifier, timestamp));
}
public static Task DeleteItemAsync(this IStargate gate, string table, string row, string column = null, string qualifier = null,
long?timestamp = null)
{
return(gate.DeleteItemAsync(BuildIdentifier(table, row, column, qualifier, timestamp)));
}
/// <summary>
/// Writes the value to HBase using the identifier values.
/// </summary>
/// <param name="gate">The gate.</param>
/// <param name="value">The value.</param>
/// <param name="table">The table.</param>
/// <param name="row">The row.</param>
/// <param name="column">The column.</param>
/// <param name="qualifier">The qualifier.</param>
/// <param name="timestamp">The timestamp.</param>
public static void WriteValue(this IStargate gate, string value, string table, string row, string column, string qualifier = null,
long?timestamp = null)
{
gate.WriteValue(BuildIdentifier(table, row, column, qualifier, timestamp), value);
}
public static Task WriteValueAsync(this IStargate gate, string value, string table, string row, string column, string qualifier = null,
long?timestamp = null)
{
return(gate.WriteValueAsync(BuildIdentifier(table, row, column, qualifier, timestamp), value));
}
/// <summary>
/// Finds the cells with the matching attributes.
/// </summary>
/// <param name="gate">The gate.</param>
/// <param name="table">The table.</param>
/// <param name="row">The row.</param>
/// <param name="column">The column.</param>
/// <param name="qualifier">The qualifier.</param>
/// <param name="beginTimestamp">The begin timestamp (exclusive).</param>
/// <param name="endTimestamp">The end timestamp (exclusive).</param>
/// <param name="maxVersions">The maximum versions to return.</param>
public static CellSet FindCells(this IStargate gate, string table, string row = null, string column = null, string qualifier = null,
long?beginTimestamp = null, long?endTimestamp = null, int?maxVersions = null)
{
return(gate.FindCells(BuildQuery(table, row, column, qualifier, beginTimestamp, endTimestamp, maxVersions)));
}
/// <summary>
/// Reads the value at the matching location.
/// </summary>
/// <param name="gate">The gate.</param>
/// <param name="table">The table.</param>
/// <param name="row">The row.</param>
/// <param name="column">The column.</param>
/// <param name="qualifier">The qualifier.</param>
/// <param name="timestamp">The timestamp.</param>
public static string ReadValue(this IStargate gate, string table, string row, string column, string qualifier = null, long?timestamp = null)
{
return(gate.ReadValue(BuildIdentifier(table, row, column, qualifier, timestamp)));
}
public RestDatabaseService(string BaseUrl)
{
this.BaseUrl = BaseUrl;
this.StargateApi = Stargate.Create(BaseUrl);
}
public MailTable(IStargate client)
{
_client = client;
}
