public ParsedFolderData(List <ColumnOrSuperColumn> allColumns)
{
byte[] propertiesKey = ByteEncoderHelper.UTF8Encoder.ToByteArray("properties");
byte[] subFoldersKey = ByteEncoderHelper.UTF8Encoder.ToByteArray("sub_folders");
bool propsFound = false;
bool subFoldersFound = false;
_items = new List <ColumnOrSuperColumn>();
foreach (ColumnOrSuperColumn col in allColumns)
{
if (!propsFound && col.Super_column.Name.SequenceEqual(propertiesKey))
{
//properties
propsFound = true;
_propertiesSc = col;
}
else if (!subFoldersFound && col.Super_column.Name.SequenceEqual(subFoldersKey))
{
subFoldersFound = true;
_subfoldersSc = col;
}
else
{
_items.Add(col);
}
}
}
/// <summary>
/// Reads data from storage
/// </summary>
/// <param name="key">Key which identifies the data</param>
/// <returns>Storage data</returns>
public object Value(Guid key)
{
// Get statement
byte[] keyEncoded = key.ToByteArray();
ColumnPath columnPath = new ColumnPath()
{
Column = ByteEncoderHelper.UTF8Encoder.ToByteArray("Value"),
Column_family = columnFamily,
};
ColumnOrSuperColumn column = (ColumnOrSuperColumn)cluster.Execute(new ExecutionBlock(delegate(Cassandra.Client client)
{
return(client.get(keyEncoded, columnPath, ConsistencyLevel.ONE));
}), keySpace);
var data = column.Column.Value;
using (MemoryStream ms = new MemoryStream(data))
{
using (BinaryReader br = new BinaryReader(ms))
{
return(Serializer.Deserialize(br));
}
}
}
static void Main(string[] args)
{
//建立数据库连接
TTransport transport = new TSocket("192.168.10.2", 9160);
TProtocol protocol = new TBinaryProtocol(transport);
Cassandra.Client client = new Cassandra.Client(protocol);
transport.Open();
System.Text.Encoding utf8Encoding = System.Text.Encoding.UTF8;
long timeStamp = DateTime.Now.Millisecond;
ColumnPath nameColumnPath = new ColumnPath()
{
Column_family = "Standard1",
Column = utf8Encoding.GetBytes("age")
};
//写入数据
client.insert("Keyspace1",
"studentA",
nameColumnPath,
utf8Encoding.GetBytes("18"),
timeStamp,
ConsistencyLevel.ONE);
//读取数据
ColumnOrSuperColumn returnedColumn = client.get("Keyspace1", "studentA", nameColumnPath, ConsistencyLevel.ONE);
Console.WriteLine("Keyspace1/Standard1: age: {0}, value: {1}", utf8Encoding.GetString(returnedColumn.Column.Name), utf8Encoding.GetString(returnedColumn.Column.Value));
//关闭连接
transport.Close();
}
public override void Execute(Apache.Cassandra.Cassandra.Client cassandraClient, ILog logger)
{
ColumnOrSuperColumn columnOrSupercolumn = null;
var columnPath = BuildColumnPath(columnName);
try
{
columnOrSupercolumn = cassandraClient.get(PartitionKey, columnPath, consistencyLevel);
}
catch (NotFoundException)
{
//ничего не делаем
}
Output = columnOrSupercolumn?.Column.FromCassandraColumn();
}
public static IFluentBaseColumn ConvertToFluentBaseColumn(ColumnOrSuperColumn col, CassandraColumnFamilySchema schema)
{
if (col.Super_column != null)
{
return(ConvertSuperColumnToFluentSuperColumn(col.Super_column, schema));
}
else if (col.Column != null)
{
return(ConvertColumnToFluentColumn(col.Column, schema));
}
else if (col.Counter_super_column != null)
{
return(ConvertColumnToFluentCounterColumn(col.Counter_column, schema));
}
else if (col.Counter_column != null)
{
return(ConvertSuperColumnToFluentCounterSuperColumn(col.Counter_super_column, schema));
}
else
{
return(null);
}
}
public void Read(TProtocol iprot)
{
TField field;
iprot.ReadStructBegin();
while (true)
{
field = iprot.ReadFieldBegin();
if (field.Type == TType.Stop) {
break;
}
switch (field.ID)
{
case 1:
if (field.Type == TType.String) {
this.key = iprot.ReadString();
this.__isset.key = true;
} else {
TProtocolUtil.Skip(iprot, field.Type);
}
break;
case 2:
if (field.Type == TType.List) {
{
this.columns = new List<ColumnOrSuperColumn>();
TList _list8 = iprot.ReadListBegin();
for( int _i9 = 0; _i9 < _list8.Count; ++_i9)
{
ColumnOrSuperColumn _elem10 = new ColumnOrSuperColumn();
_elem10 = new ColumnOrSuperColumn();
_elem10.Read(iprot);
this.columns.Add(_elem10);
}
iprot.ReadListEnd();
}
this.__isset.columns = true;
} else {
TProtocolUtil.Skip(iprot, field.Type);
}
break;
default:
TProtocolUtil.Skip(iprot, field.Type);
break;
}
iprot.ReadFieldEnd();
}
iprot.ReadStructEnd();
}
public static IFluentBaseColumn <CompareWith> ConvertToFluentBaseColumn <CompareWith, CompareSubcolumnWith>(ColumnOrSuperColumn col)
where CompareWith : CassandraType
where CompareSubcolumnWith : CassandraType
{
if (col.Super_column != null)
{
return(ConvertSuperColumnToFluentSuperColumn <CompareWith, CompareSubcolumnWith>(col.Super_column));
}
else if (col.Column != null)
{
return(ConvertColumnToFluentColumn <CompareWith>(col.Column));
}
else
{
return(null);
}
}
static void Main(string[] args)
{
TTransport transport = new TSocket("localhost", 9160);
TProtocol protocol = new TBinaryProtocol(transport);
Cassandra.Client client = new Cassandra.Client(protocol);
Console.WriteLine("Opening connection");
transport.Open();
System.Text.Encoding utf8Encoding = System.Text.Encoding.UTF8;
long timeStamp = DateTime.Now.Millisecond;
ColumnPath nameColumnPath = new ColumnPath()
{
Column_family = "Standard1",
Column = utf8Encoding.GetBytes("name")
};
Console.WriteLine("Inserting name columns");
//Insert the data into the column 'name'
client.insert("Keyspace1",
"1",
nameColumnPath,
utf8Encoding.GetBytes("Joe Bloggs"),
timeStamp,
ConsistencyLevel.ONE);
client.insert("Keyspace1",
"2",
nameColumnPath,
utf8Encoding.GetBytes("Joe Soap"),
timeStamp,
ConsistencyLevel.ONE);
//Simple single value get using the key to get column 'name'
ColumnOrSuperColumn returnedColumn = client.get("Keyspace1", "1", nameColumnPath, ConsistencyLevel.ONE);
Console.WriteLine("Column Data in Keyspace1/Standard1: name: {0}, value: {1}",
utf8Encoding.GetString(returnedColumn.Column.Name),
utf8Encoding.GetString(returnedColumn.Column.Value));
Console.WriteLine("Getting splice range");
//Read an entire row
SlicePredicate predicate = new SlicePredicate()
{
Slice_range = new SliceRange()
{
//Start and Finish cannot be null
Start = new byte[0],
Finish = new byte[0],
Count = 10,
Reversed = false
}
};
ColumnParent parent = new ColumnParent()
{
Column_family = "Standard1"
};
Dictionary <string, List <ColumnOrSuperColumn> > results = client.multiget_slice("Keyspace1",
new List <string>()
{
"1", "2"
},
parent,
predicate,
ConsistencyLevel.ONE);
foreach (KeyValuePair <string, List <ColumnOrSuperColumn> > resultPair in results)
{
Console.WriteLine("Key: {0}", resultPair.Key);
foreach (ColumnOrSuperColumn resultColumn in resultPair.Value)
{
Column column = resultColumn.Column;
Console.WriteLine("name: {0}, value: {1}", utf8Encoding.GetString(column.Name), utf8Encoding.GetString(column.Value));
}
}
Console.WriteLine("Closing connection");
transport.Close();
}