org.apache.derby.iapi.store.raw

Interface StreamContainerHandle

All Known Implementing Classes:

StreamFileContainerHandle

public interface StreamContainerHandle

A Stream Container handle

Field Summary

Fields

Modifier and Type	Field and Description
static int	TEMPORARY_SEGMENT

Method Summary

Modifier and Type	Method and Description
void	close() Close me.
boolean	fetchNext(DataValueDescriptor[] row) Fetch the next record.
void	getContainerProperties(java.util.Properties prop) Request the system properties associated with a container.
ContainerKey	getId() Return my identifier.
void	removeContainer() remove the stream container

Field Detail

TEMPORARY_SEGMENT

static final int TEMPORARY_SEGMENT

See Also:

Constant Field Values

Method Detail

getId

ContainerKey getId()

Return my identifier.

getContainerProperties

void getContainerProperties(java.util.Properties prop)
                     throws StandardException

Request the system properties associated with a container.

Request the value of properties that are associated with a stream table. The following properties can be requested: derby.storage.streamFileBufferSize

To get the value of a particular property add it to the property list, and on return the value of the property will be set to it's current value. For example: get_prop(ConglomerateController cc) { Properties prop = new Properties(); prop.put("derby.storage.streamFileBufferSize", ""); cc.getTableProperties(prop); System.out.println( "table's buffer size = " + prop.getProperty("derby.storage.streamFileBufferSize"); }

Parameters:

prop - Property list to fill in.

Throws:

StandardException - Standard exception policy.

fetchNext

boolean fetchNext(DataValueDescriptor[] row)
           throws StandardException

Fetch the next record. Fills in the Storable columns within the passed in row if row is not null, otherwise the record is not fetched. If the row.length is less than the number of fields in the row, then, will fill the row, and ignore the rest of the row.
When no more row is found, then false is returned.

Locking Policy
No locks.

Parameters:

row - Row to be filled in with information from the record.

Throws:

StandardException - Standard Derby error policy

close

void close()

Close me. After using this method the caller must throw away the reference to the Container object, e.g.

                        ref.close();
                        ref = null;
                

The container will be closed automatically at the commit or abort of the transaction if this method is not called explictly.

removeContainer

void removeContainer()
              throws StandardException

remove the stream container

Throws:

StandardException - Standard Derby error policy