org.datanucleus.store.cassandra

Class CassandraSchemaHandler

java.lang.Object

org.datanucleus.store.schema.AbstractStoreSchemaHandler

org.datanucleus.store.cassandra.CassandraSchemaHandler

All Implemented Interfaces:

org.datanucleus.store.schema.StoreSchemaHandler

public class CassandraSchemaHandler
extends org.datanucleus.store.schema.AbstractStoreSchemaHandler

Handler for schema management with Cassandra. Supports the following metadata extensions

• ClassMetaData extension "cassandra.createTable.options" specifies any OPTIONS for a CREATE TABLE statement (comma-separated value if wanting multiple options)
• IndexMetaData extension "cassandra.createIndex.using" specifies any USING clause for a CREATE INDEX statement

Field Summary

Fields inherited from class org.datanucleus.store.schema.AbstractStoreSchemaHandler

autoCreateColumns, autoCreateConstraints, autoCreateDatabase, autoCreateTables, autoCreateWarnOnError, autoDeleteColumns, storeMgr, validateColumns, validateConstraints, validateTables

Constructor Summary

Constructors

Constructor and Description
CassandraSchemaHandler(CassandraStoreManager storeMgr)

Method Summary

Modifier and Type	Method and Description
void	createDatabase(String catalogName, String schemaName, Properties props, Object connection) Method to create a database (keyspace) in Cassandra.
protected String	createIndexCQL(String indexName, String schemaName, String tableName, String columnName, org.datanucleus.metadata.IndexMetaData idxmd)
protected void	createSchemaForClass(org.datanucleus.metadata.AbstractClassMetaData cmd, com.datastax.driver.core.Session session, org.datanucleus.ClassLoaderResolver clr, List<String> tableStmts, List<String> constraintStmts) Method to generate the necessary CQL to create the schema (table/indexes) for the specified class.
void	createSchemaForClasses(Set<String> classNames, Properties props, Object connection)
void	deleteDatabase(String catalogName, String schemaName, Properties props, Object connection) Method to drop a database (keyspace) in Cassandra.
void	deleteSchemaForClasses(Set<String> classNames, Properties props, Object connection)
protected com.datastax.driver.core.ColumnMetadata	getColumnMetadataForColumn(com.datastax.driver.core.TableMetadata tmd, org.datanucleus.store.schema.table.Column col)
protected com.datastax.driver.core.ColumnMetadata	getColumnMetadataForColumnName(com.datastax.driver.core.TableMetadata tmd, String colName)
protected com.datastax.driver.core.IndexMetadata	getIndexMetadataForColumn(com.datastax.driver.core.TableMetadata tmd, String colName)
static com.datastax.driver.core.KeyspaceMetadata	getKeyspaceMetadata(com.datastax.driver.core.Session session, String schemaName)
static com.datastax.driver.core.TableMetadata	getTableMetadata(com.datastax.driver.core.Session session, String schemaName, String tableName)
protected String	getTypeNameForColumn(com.datastax.driver.core.ColumnMetadata colmd)
void	validateSchema(Set<String> classNames, Properties props, Object connection)

Methods inherited from class org.datanucleus.store.schema.AbstractStoreSchemaHandler

clear, getSchemaData, getStoreManager, isAutoCreateColumns, isAutoCreateConstraints, isAutoCreateDatabase, isAutoCreateTables, isAutoCreateWarnOnError, isAutoDeleteColumns, isValidateColumns, isValidateConstraints, isValidateTables

Methods inherited from class java.lang.Object

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

Constructor Detail

CassandraSchemaHandler

public CassandraSchemaHandler(CassandraStoreManager storeMgr)

Method Detail

createDatabase

public void createDatabase(String catalogName,
                           String schemaName,
                           Properties props,
                           Object connection)

Method to create a database (keyspace) in Cassandra. Accepts properties with names "replication", "durable_writes" (case sensitive).

Specified by:

createDatabase in interface org.datanucleus.store.schema.StoreSchemaHandler

Overrides:

createDatabase in class org.datanucleus.store.schema.AbstractStoreSchemaHandler

Parameters:

catalogName - Unused

schemaName - Name of the schema

props - Any properties defining the new keyspace

createSchemaForClasses

public void createSchemaForClasses(Set<String> classNames,
                                   Properties props,
                                   Object connection)

Specified by:

createSchemaForClasses in interface org.datanucleus.store.schema.StoreSchemaHandler

Overrides:

createSchemaForClasses in class org.datanucleus.store.schema.AbstractStoreSchemaHandler

createSchemaForClass

protected void createSchemaForClass(org.datanucleus.metadata.AbstractClassMetaData cmd,
                                    com.datastax.driver.core.Session session,
                                    org.datanucleus.ClassLoaderResolver clr,
                                    List<String> tableStmts,
                                    List<String> constraintStmts)

Method to generate the necessary CQL to create the schema (table/indexes) for the specified class.

Parameters:

cmd - Metadata for the class

session - Session to use for checking of existence in datastore

clr - ClassLoader resolver

tableStmts - List to add any table CQL statements to

constraintStmts - List to add any constraint CQL statements to

deleteDatabase

public void deleteDatabase(String catalogName,
                           String schemaName,
                           Properties props,
                           Object connection)

Method to drop a database (keyspace) in Cassandra.

Specified by:

deleteDatabase in interface org.datanucleus.store.schema.StoreSchemaHandler

Overrides:

deleteDatabase in class org.datanucleus.store.schema.AbstractStoreSchemaHandler

Parameters:

catalogName - Unused

schemaName - Name of the schema (keyspace).

props - Any properties controlling deletion

connection - Connection to use (null implies this will obtain its own connection)

deleteSchemaForClasses

public void deleteSchemaForClasses(Set<String> classNames,
                                   Properties props,
                                   Object connection)

Specified by:

deleteSchemaForClasses in interface org.datanucleus.store.schema.StoreSchemaHandler

Overrides:

deleteSchemaForClasses in class org.datanucleus.store.schema.AbstractStoreSchemaHandler

validateSchema

public void validateSchema(Set<String> classNames,
                           Properties props,
                           Object connection)

Specified by:

validateSchema in interface org.datanucleus.store.schema.StoreSchemaHandler

Overrides:

validateSchema in class org.datanucleus.store.schema.AbstractStoreSchemaHandler

createIndexCQL

protected String createIndexCQL(String indexName,
                                String schemaName,
                                String tableName,
                                String columnName,
                                org.datanucleus.metadata.IndexMetaData idxmd)

getTableMetadata

public static com.datastax.driver.core.TableMetadata getTableMetadata(com.datastax.driver.core.Session session,
                                                                      String schemaName,
                                                                      String tableName)

getKeyspaceMetadata

public static com.datastax.driver.core.KeyspaceMetadata getKeyspaceMetadata(com.datastax.driver.core.Session session,
                                                                            String schemaName)

getTypeNameForColumn

protected String getTypeNameForColumn(com.datastax.driver.core.ColumnMetadata colmd)

getColumnMetadataForColumn

protected com.datastax.driver.core.ColumnMetadata getColumnMetadataForColumn(com.datastax.driver.core.TableMetadata tmd,
                                                                             org.datanucleus.store.schema.table.Column col)

getColumnMetadataForColumnName

protected com.datastax.driver.core.ColumnMetadata getColumnMetadataForColumnName(com.datastax.driver.core.TableMetadata tmd,
                                                                                 String colName)

getIndexMetadataForColumn

protected com.datastax.driver.core.IndexMetadata getIndexMetadataForColumn(com.datastax.driver.core.TableMetadata tmd,
                                                                           String colName)