ToC path:

The Java Classes

As Java is an object oriented language, the eXtremeDB Java Native Interface (JNI) it is implemented as a "wrapper" over the core C language eXtremeDB libraries. However, the JNI does not simply translate calls to the underlying C API (with all of the appropriate arguments) but implements an object model of database interface where functionalities are grouped and encapsulated in classes.

For example, the Connection class encapsulates the C API connection handle mco_db_h. Instances of Connection internally call the C function mco_db_connect() in its constructor and function mco_db_disconnect() in its close() method and in its destructor. So the Connection class logically aggregates wrappers of the C API functions that require a connection handle mco_db_h as main argument.

Likewise, class Database implements methods which directly or indirectly call C API functions that are not related to a separated connection, like mco_runtime_start(), mco_runtime_stop(), mco_db_open(), mco_db_close() etc.

Please use the links below to view the individual class definitions:

Database Database creation, open and close

Connection Methods for database operations

Cursor Methods for iterating through instances of a class

Aggregator Used to perform aggregation

GroupByResult Represents the result of group by aggregation operation

Sequence Used to store an array field in the database as a sequence

SequenceIterator Used to iterate sequence fields

Statistic Used to provide runtime database statistics

SQL Classes

SqlAggregator Aggregate multiple SqlLocalConnection engines

SqlCursor Used to iterate through the result of an SQL query

SqlLocalConnection Used for local (in process) SQL access

SqlRemoteConnection Used for remote SQL access to a SqlServer instance

SqlResultSet Data set for SQL query results

SqlServer Provides a SQL server for SqlLocalConnection and SqlRemoteConnection access

SqlTuple The unit (a row) of SQL query results

Transaction Logging Classes

LogReader eXtremeDB Transaction Logging transaction log reader

LogWriter eXtremeDB Transaction Logging transaction log writer

High Availability Classes

MasterConnection Extends Connection for eXtremeDB High Availability master applications

ReplicaConnection Extends Connection for eXtremeDB High Availability replica applications

ClusterConnection Extends Connection for eXtremeDB Cluster applications

Database	Database creation, open and close
Connection	Methods for database operations
Cursor	Methods for iterating through instances of a class
Aggregator	Used to perform aggregation
GroupByResult	Represents the result of `group by` aggregation operation
Sequence	Used to store an array field in the database as a sequence
SequenceIterator	Used to iterate `sequence` fields
Statistic	Used to provide runtime database statistics
SQL Classes
SqlAggregator	Aggregate multiple SqlLocalConnection engines
SqlCursor	Used to iterate through the result of an SQL query
SqlLocalConnection	Used for local (in process) SQL access
SqlRemoteConnection	Used for remote SQL access to a SqlServer instance
SqlResultSet	Data set for SQL query results
SqlServer	Provides a SQL server for SqlLocalConnection and SqlRemoteConnection access
SqlTuple	The unit (a row) of SQL query results
Transaction Logging Classes
LogReader	eXtremeDB Transaction Logging transaction log reader
LogWriter	eXtremeDB Transaction Logging transaction log writer
High Availability Classes
MasterConnection	Extends Connection for eXtremeDB High Availability master applications
ReplicaConnection	Extends Connection for eXtremeDB High Availability replica applications
ClusterConnection	Extends Connection for eXtremeDB Cluster applications