org.odpi.openmetadata.accessservices.analyticsmodeling.assets

Class DatabaseContextHandler

java.lang.Object

org.odpi.openmetadata.accessservices.analyticsmodeling.assets.DatabaseContextHandler

public class DatabaseContextHandler
extends Object

The class builds data content of the Analytics Modeling OMAS responses.
This class contains logic about elements required to build responses and their relationships. Only methods used to build responses should be public.

Here is the exposed functionality:

• Get databases getDatabases(java.lang.String, java.lang.Integer, java.lang.Integer)
• Get database schemas getSchemaTables(java.lang.String, java.lang.String)
• Get schema tables getSchemaTables(java.lang.String, java.lang.String)
• Get physical module getModule(java.lang.String, java.lang.String, java.lang.String, org.odpi.openmetadata.accessservices.analyticsmodeling.model.ModuleTableFilter)

Database metadata is retrieved from OMRS using object of type OMEntityDao
All repository logic should be handled there.

Field Summary

Fields

Modifier and Type	Field and Description
static String	DATA_SOURCE_GUID

Constructor Summary

Constructors

Constructor and Description
DatabaseContextHandler(RelationalDataHandler<Database,Schema,Object,Object,Object,Object> relationalDataHandler, OMEntityDao omEntityDao, InvalidParameterHandler invalidParameterHandler)

Method Summary

Modifier and Type	Method and Description
List<ResponseContainerDatabase>	getDatabases(String userId, Integer startFrom, Integer pageSize) Get list of databases on the server.
List<ResponseContainerDatabaseSchema>	getDatabaseSchemas(String userId, String guidDatabase, Integer startFrom, Integer pageSize) Retrieve schemas for given database from repository.
ResponseContainerModule	getModule(String databaseGuid, String catalog, String schema, ModuleTableFilter filter) Build Analytics Modeling module for database schema
ResponseContainerSchemaTables	getSchemaTables(String guidDataSource, String schema) Get tables for schema.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DATA_SOURCE_GUID

public static final String DATA_SOURCE_GUID

See Also:

Constant Field Values

Constructor Detail

DatabaseContextHandler

public DatabaseContextHandler(RelationalDataHandler<Database,Schema,Object,Object,Object,Object> relationalDataHandler,
                              OMEntityDao omEntityDao,
                              InvalidParameterHandler invalidParameterHandler)

Method Detail

getDatabases

public List<ResponseContainerDatabase> getDatabases(String userId,
                                                    Integer startFrom,
                                                    Integer pageSize)
                                             throws AnalyticsModelingCheckedException

Get list of databases on the server.

Parameters:

userId - for the call.

startFrom - starting element (used in paging through large result sets)

pageSize - maximum number of results to return

Returns:

list of database descriptors.

Throws:

AnalyticsModelingCheckedException - in case of an repository operation failure.

getDatabaseSchemas

public List<ResponseContainerDatabaseSchema> getDatabaseSchemas(String userId,
                                                                String guidDatabase,
                                                                Integer startFrom,
                                                                Integer pageSize)
                                                         throws AnalyticsModelingCheckedException,
                                                                InvalidParameterException

Retrieve schemas for given database from repository.

Parameters:

userId - for the call.

guidDatabase - defines database

startFrom - starting element (used in paging through large result sets)

pageSize - maximum number of results to return

Returns:

list of schemas attributes.

Throws:

AnalyticsModelingCheckedException - in case of an repository operation failure.

InvalidParameterException - if passed GUID is invalid.

getSchemaTables

public ResponseContainerSchemaTables getSchemaTables(String guidDataSource,
                                                     String schema)
                                              throws AnalyticsModelingCheckedException,
                                                     InvalidParameterException

Get tables for schema.

Parameters:

guidDataSource - of the schema.

schema - name.

Returns:

list of table names.

Throws:

AnalyticsModelingCheckedException - if failed

InvalidParameterException - if passed GUID is invalid.

getModule

public ResponseContainerModule getModule(String databaseGuid,
                                         String catalog,
                                         String schema,
                                         ModuleTableFilter filter)
                                  throws AnalyticsModelingCheckedException,
                                         InvalidParameterException

Build Analytics Modeling module for database schema

Parameters:

databaseGuid - of the module

catalog - of the module

schema - of the module

filter - contains optional table filter

Returns:

module built for defined schema

Throws:

AnalyticsModelingCheckedException - in case of an repository operation failure.

InvalidParameterException - if passed GUID is invalid.