private static void ProcessGetResult(Request request)
{
Object[] requestData = request.getMethodParameters();
string id = requestData[0].ToString();
int startLine = Convert.ToInt32(requestData[1]);
int numberOfLines = Convert.ToInt32(requestData[2]);
QueryResult queryResult;
ResultStorage resultStorage = ResultStorage.Instance;
QueryDataset queryDataset = resultStorage.GetQueryResult(id, startLine, numberOfLines);
queryResult = new QueryResult(Convert.ToInt32(id), "Resulting rows being posted.");
IRootServerCallback iRootServerCallback = request.getRootServerCallback();
iRootServerCallback.PutDataset(queryResult, id, queryDataset);
}
void dispatchRequest(Request request)
{
switch (request.getRequestType())
{
case RequestType.EXECUTE_QUERY:
ProcessExecQuery(request);
break;
case RequestType.GET_RESULT:
ProcessGetResult(request);
break;
case RequestType.RELEASE:
ProcessRelease(request);
break;
default:
break;
}
}
public void SelectRow(Statement queryObj, IRootServerCallback callback)
{
SelectRows selectRows = (SelectRows)queryObj;
List<TernaryAssociative<string, string, string>> whereList = new List<TernaryAssociative<string, string, string>>();
List<KeyValuePair<string, string>> orderByColumns = new List<KeyValuePair<string, string>>();
m_Request = new Request();
m_Parameters = new Object[8];
m_Parameters[0] = GetDatabaseName(m_token);
m_Parameters[1] = selectRows.GetTableName();
if(selectRows.GetSelectRowTableColList().GetSelectRowColumnType() == SelectRowColumnType.ALL_COLUMNS)
{
m_Parameters[2] = new List<string>();
m_Parameters[3] = "";
}
else if (selectRows.GetSelectRowTableColList().GetSelectRowColumnType() == SelectRowColumnType.SPECIFIC_COLUMNS)
{
m_Parameters[2] = selectRows.GetSelectRowTableColList().GetTableColumnList().GetList();
m_Parameters[3] = "";
}
else if (selectRows.GetSelectRowTableColList().GetSelectRowColumnType() == SelectRowColumnType.COUNT_ROWS)
{
m_Parameters[2] = new List<string>();
if(selectRows.GetSelectRowTableColList().GetCountRows().GetCountAllRowsFlag() == true)
m_Parameters[3] = "*";
else
m_Parameters[3] = selectRows.GetSelectRowTableColList().GetCountRows().GetColumnName();
}
if (selectRows.GetWhereListFlag() == true)
{
List<WhereEntry> whereEntries = selectRows.GetWhereList().GetSubWhereList().GetWhereEntryList();
foreach (WhereEntry whereEntry in whereEntries)
{
TernaryAssociative<string, string, string> item = new TernaryAssociative<string, string, string>();
item.First = whereEntry.GetColumnName();
item.Second = whereEntry.GetComparisonOperatorType().ToString();
if (whereEntry.GetColumnValue().GetColumnValueType() == ColValueType.STRING)
{
item.Third = whereEntry.GetColumnValue().GetStringColumnValue();
}
else if (whereEntry.GetColumnValue().GetColumnValueType() == ColValueType.INTEGER)
{
item.Third = whereEntry.GetColumnValue().GetIntColumnValue().ToString();
}
else if (whereEntry.GetColumnValue().GetColumnValueType() == ColValueType.DOUBLE)
{
item.Third = whereEntry.GetColumnValue().GetDoubleColumnValue().ToString();
}
whereList.Add(item);
}
}
m_Parameters[4] = whereList;
if (selectRows.GetOrderByFlag() == true)
{
List<OrderByEntry> orderByEntries = selectRows.GetOrderByList().GetSubOrderBylist().GetOrderByEntryList();
foreach (OrderByEntry orderByEntry in orderByEntries)
{
KeyValuePair<string, string> item = new KeyValuePair<string, string>(orderByEntry.GetColumnName(),orderByEntry.GetOrderByType());
orderByColumns.Add(item);
}
}
m_Parameters[5] = orderByColumns;
if (selectRows.GetLimitRangeFlag() == true)
{
m_Parameters[6] = selectRows.GetLimitRange().GetStartIndex();
m_Parameters[7] = selectRows.GetLimitRange().GetCount();
}
else
{
m_Parameters[6] = -1;
m_Parameters[7] = -1;
}
m_Request.SetCallingMethod("SelectRow");
m_Request.SetRequestType(RequestType.EXECUTE_QUERY);
m_Request.SetRootServerCallback(callback);
m_Request.SetMethodParameters(m_Parameters);
}
public void InsertRow(Statement queryObj, IRootServerCallback callback)
{
InsertRow insertObj = (InsertRow)queryObj;
List<string> ColumnList = new List<string>();
ArrayList ColumnValueList = new ArrayList();
foreach (ColumnValue val in insertObj.GetValueList())
{
if (val.GetColumnValueType() == ColValueType.STRING)
{
ColumnValueList.Add(val.GetStringColumnValue());
}
else if (val.GetColumnValueType() == ColValueType.INTEGER)
{
ColumnValueList.Add(val.GetIntColumnValue());
}
else if (val.GetColumnValueType() == ColValueType.DOUBLE)
{
ColumnValueList.Add(val.GetDoubleColumnValue());
}
}
m_Request = new Request();
m_Parameters = new Object[4];
m_Parameters[0] = GetDatabaseName(m_token);
m_Parameters[1] = insertObj.GetTableName();
m_Parameters[2] = insertObj.GetList();
m_Parameters[3] = ColumnValueList;
m_Request.SetCallingMethod("InsertRow");
m_Request.SetRequestType(RequestType.EXECUTE_QUERY);
m_Request.SetRootServerCallback(callback);
m_Request.SetMethodParameters(m_Parameters);
}
public void RenameColumn(Statement queryObj, IRootServerCallback callback)
{
m_Request = new Request();
m_Parameters = new Object[4];
m_Parameters[0] = GetDatabaseName(m_token);
m_Parameters[1] = ((RenameColumn)queryObj).GetTableName();
m_Parameters[2] = ((RenameColumn)queryObj).GetOldColumnName();
m_Parameters[3] = ((RenameColumn)queryObj).GetNewColumnName();
m_Request.SetCallingMethod("RenameColumn");
m_Request.SetRequestType(RequestType.EXECUTE_QUERY);
m_Request.SetRootServerCallback(callback);
m_Request.SetMethodParameters(m_Parameters);
}
public void EmptyTable(Statement queryObj, IRootServerCallback callback)
{
m_Request = new Request();
m_Parameters = new Object[2];
m_Parameters[0] = GetDatabaseName(m_token);
m_Parameters[1] = ((EmptyTable)queryObj).GetTableName();
m_Request.SetCallingMethod("EmptyTable");
m_Request.SetRequestType(RequestType.EXECUTE_QUERY);
m_Request.SetRootServerCallback(callback);
m_Request.SetMethodParameters(m_Parameters);
}
public void DeleteDb(Statement queryObj,IRootServerCallback callback)
{
m_Request = new Request();
m_Parameters = new Object[1];
m_Parameters[0] = ((DeleteDB)queryObj).GetDatabaseName();
m_Request.SetCallingMethod("DeleteDatabase");
m_Request.SetRequestType(RequestType.EXECUTE_QUERY);
m_Request.SetRootServerCallback(callback);
m_Request.SetMethodParameters(m_Parameters);
}
public void ModifyTable(Statement queryObj,IRootServerCallback callback)
{
m_Request = new Request();
ModifyTab obj = (ModifyTab)queryObj;
if (obj.GetTyp() == "ADD")
{
AddColumn columnData = obj.GetAddColumnData();
m_Parameters = new Object[5];
m_Parameters[0] = GetDatabaseName(m_token);
m_Parameters[1] = columnData.GetTableName();
if (columnData.GetColumnData().GetUniqueKey() == null)
m_Parameters[2] = false;
else
m_Parameters[2] = true;
m_Parameters[3] = columnData.GetColumnData().GetColumnName();
if (columnData.GetColumnData().GetVarType() == "VARCHAR")
m_Parameters[4] = "VARCHAR" + "(" + columnData.GetColumnData().GetVarRange() + ")";
else
m_Parameters[4] = columnData.GetColumnData().GetVarType();
m_Request.SetCallingMethod("AddColumn");
}
else
{
DeleteColumn columnData = obj.GetDelcolumnData();
m_Parameters = new Object[3];
m_Parameters[0] = GetDatabaseName(m_token);
m_Parameters[1] = columnData.GetTableName();
m_Parameters[2] = columnData.GetColumnData();
m_Request.SetCallingMethod("DeleteColumn");
}
m_Request.SetRequestType(RequestType.EXECUTE_QUERY);
m_Request.SetRootServerCallback(callback);
m_Request.SetMethodParameters(m_Parameters);
}
/*
* GetResult(id,startline,numberOfLines) receives a request asking for data
* in a table stored on the root server.
* @param id is the identifier for the table on root server.
* @param startLine is the first data entry that the client wants.
* @param numberOfLines is the total number of data entries the client wants.
* @param token is the authentication token.
* @returns the result of operation and info related to the result.
*/
public QueryResult GetResult(string id, int startLine, int numberOfLines, string token)
{
QueryResult queryResult;
DateTime dateTime;
DependencyInjection di = DependencyInjection.GetInstance();
IAuthValidate iAuthValidate = (IAuthValidate)di.CreateObject("validate",new object[]
{ null,
m_AuthSeverUrl
});
if (!iAuthValidate.Validate(token, out dateTime))
{
queryResult = new QueryResult(-1, "Could not authenticate user.");
return queryResult;
}
Request request = new Request();
request.SetRequestType(RequestType.GET_RESULT);
request.setTableServerObject(m_ITableServer);
Object[] requestData = new Object[3];
requestData[0] = id;
requestData[1] = startLine;
requestData[2] = numberOfLines;
request.SetMethodParameters(requestData);
request.SetRootServerCallback(OperationContext.Current.GetCallbackChannel<IRootServerCallback>());
m_RequestQueue.enQueueRequest(request);
queryResult = new QueryResult(Convert.ToInt32(id), "Query result request received.");
return queryResult;
}
private void CreateDb(Statement queryObj, IRootServerCallback callback)
{
try
{
m_Request = new Request();
m_Parameters = new Object[1];
m_Parameters[0] = ((CreateDB)queryObj).GetDatabaseName();
m_Request.SetCallingMethod("CreateDatabase");
m_Request.SetRequestType(RequestType.EXECUTE_QUERY);
m_Request.SetRootServerCallback(callback);
m_Request.SetMethodParameters(m_Parameters);
}
catch (Exception ex)
{
Console.WriteLine("createdb: " + ex.Message);
}
}
private static void ProcessExecQuery(Request request)
{
ITableServer tableServerObject = request.getTableServerObject();
Type created = tableServerObject.GetType();
Object resultObject = created.InvokeMember(request.getCallingMethod(),
System.Reflection.BindingFlags.Default | System.Reflection.BindingFlags.InvokeMethod,
null,
tableServerObject,
request.getMethodParameters()
);
TableResponse tableResponse = (TableResponse)resultObject;
IRootServerCallback iRootServerCallback = request.getRootServerCallback();
string id = tableResponse.GetId;
QueryResult queryResult;
queryResult = new QueryResult(Convert.ToInt32(id), tableResponse.GetMessage);
iRootServerCallback.PutQueryInfo(queryResult, id, 0);
}
private static void ProcessRelease(Request request)
{ }
/*
* @param token is the authentication token
* @returns the DB structure.
*/
public Dictionary<string, List<string>> GetDBInfo(string token)
{
DateTime dateTime;
DependencyInjection di = DependencyInjection.GetInstance();
IAuthValidate iAuthValidate = (IAuthValidate)di.CreateObject("validate", new object[]
{ null,
m_AuthSeverUrl
});
if (!iAuthValidate.Validate(token, out dateTime))
{
throw new Exception("Not authenticated");
}
Request request = new Request();
request.SetRequestType(RequestType.DB_QUERY);
request.setTableServerObject(m_ITableServer);
request.SetRootServerCallback(OperationContext.Current.GetCallbackChannel<IRootServerCallback>());
m_RequestQueue.enQueueRequest(request);
return new Dictionary<string, List<string>>();
}
public void DeleteRows(Statement queryObj, IRootServerCallback callback)
{
DeleteRows deleteRows = (DeleteRows)queryObj;
List<TernaryAssociative<string, string, string>> whereList = new List<TernaryAssociative<string, string, string>>();
m_Request = new Request();
m_Parameters = new Object[3];
m_Parameters[0] = GetDatabaseName(m_token);
m_Parameters[1] = deleteRows.GetTableName();
if (deleteRows.GetWhereListFlag() == true)
{
List<WhereEntry> whereEntries = deleteRows.GetWhereList().GetSubWhereList().GetWhereEntryList();
foreach (WhereEntry whereEntry in whereEntries)
{
TernaryAssociative<string, string, string> item = new TernaryAssociative<string, string, string>();
item.First = whereEntry.GetColumnName();
item.Second = whereEntry.GetComparisonOperatorType().ToString();
if (whereEntry.GetColumnValue().GetColumnValueType() == ColValueType.STRING)
{
item.Third = whereEntry.GetColumnValue().GetStringColumnValue();
}
else if (whereEntry.GetColumnValue().GetColumnValueType() == ColValueType.INTEGER)
{
item.Third = whereEntry.GetColumnValue().GetIntColumnValue().ToString();
}
else if (whereEntry.GetColumnValue().GetColumnValueType() == ColValueType.DOUBLE)
{
item.Third = whereEntry.GetColumnValue().GetDoubleColumnValue().ToString();
}
whereList.Add(item);
}
}
m_Parameters[2] = whereList;
m_Request.SetCallingMethod("DeleteRow");
m_Request.SetRequestType(RequestType.EXECUTE_QUERY);
m_Request.SetRootServerCallback(callback);
m_Request.SetMethodParameters(m_Parameters);
}
private void CreateTable(Statement queryObj, IRootServerCallback callback)
{
List<TableColumn> columnList = new List<TableColumn>();
Dictionary<string, bool> columnData = new Dictionary<string, bool>();
List<bool> uniqueKey = new List<bool>();
List<string> columnName = new List<string>();
List<string> columnType = new List<string>();
string tableName = ((CreateTable)queryObj).GetTableName();
columnList = ((CreateTable)queryObj).GetList();
foreach(TableColumn column in columnList)
{
if((column.GetUniqueKey() == "PRIMARY KEY" ||(column.GetUniqueKey() == "primary key") || (column.GetUniqueKey() =="INDEX") || (column.GetUniqueKey() =="index")))
{
columnData.Add(column.GetColumnName(), true);
}
else
{
columnData.Add(column.GetColumnName(), false);
}
if (column.GetVarType() == "VARCHAR")
{
string range = column.GetVarRange();
columnType.Add("VARCHAR(" + range + ")");
}
else
{
columnType.Add(column.GetVarType());
}
}
m_Request = new Request();
m_Parameters = new Object[5];
m_Parameters[0] = GetDatabaseName(m_token);
m_Parameters[1] = tableName;
m_Parameters[2] = uniqueKey;
m_Parameters[3] = columnName;
m_Parameters[4] = columnType;
m_Request.SetCallingMethod("CreateTable");
m_Request.SetRequestType(RequestType.EXECUTE_QUERY);
m_Request.SetRootServerCallback(callback);
m_Request.SetMethodParameters(m_Parameters);
}
public void SelectDb(Statement queryObj, IRootServerCallback callback)
{
SelectDB selectdb = (SelectDB)queryObj;
m_Request = new Request();
m_Parameters = new Object[1];
m_Parameters[0] = selectdb.GetDatabaseName();
m_Request.SetCallingMethod("SelectDatabase");
m_Request.SetRequestType(RequestType.EXECUTE_QUERY);
m_Request.SetRootServerCallback(callback);
m_Request.SetMethodParameters(m_Parameters);
}
public void enQueueRequest(Request request)
{
m_RequestQueue.enQ(request);
}