Package org.apache.iceberg.nessie

Class NessieViewOperations

java.lang.Object

org.apache.iceberg.view.BaseMetastoreViewOperations

org.apache.iceberg.nessie.NessieViewOperations

All Implemented Interfaces:

ViewOperations

public class NessieViewOperations
extends BaseMetastoreViewOperations

Field Summary

Fields inherited from class org.apache.iceberg.view.BaseMetastoreViewOperations

METADATA_FOLDER_NAME, METADATA_LOCATION_PROP, PREVIOUS_METADATA_LOCATION_PROP

Method Summary

Modifier and Type	Method	Description
void	commit(ViewVersionMetadata base, ViewVersionMetadata metadata, Map<String,String> properties)	Replace the base metadata with a new version.
void	drop(String viewIdentifier)	Drops the view specified by the 'viewIdentifier' parameter.
org.apache.iceberg.io.FileIO	io()	A FileIO to read and write table data and metadata files.
ViewVersionMetadata	refresh()	Return the current view metadata after checking for updates.

Methods inherited from class org.apache.iceberg.view.BaseMetastoreViewOperations

current, currentMetadataLocation, currentVersion, refreshFromMetadataLocation, requestRefresh, writeNewMetadata

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.iceberg.view.ViewOperations

extraProperties

Method Detail

refresh

public ViewVersionMetadata refresh()

Description copied from interface: ViewOperations

Return the current view metadata after checking for updates.

Returns:

view version metadata

drop

public void drop(String viewIdentifier)

Description copied from interface: ViewOperations

Drops the view specified by the 'viewIdentifier' parameter. Used only by the test infrastructure such as HadoopViewOperations and TestViews. Metacat views are dropped using direct hive 'drop' object calls.

Parameters:

viewIdentifier - specifies the name/location of the view.

commit

public void commit(ViewVersionMetadata base,
                   ViewVersionMetadata metadata,
                   Map<String,String> properties)

Description copied from interface: ViewOperations

Replace the base metadata with a new version.

This method should implement and document atomicity guarantees.

Implementations must check that the base metadata is current to avoid overwriting updates. Once the atomic commit operation succeeds, implementations must not perform any operations that may fail because failure in this method cannot be distinguished from commit failure.

Parameters:

base - view metadata on which changes were based

metadata - new view metadata with updates

properties - Version property genie-id of the operation, as well as table properties such as owner, table type, common view flag etc.

io

public org.apache.iceberg.io.FileIO io()

Description copied from interface: ViewOperations

A FileIO to read and write table data and metadata files.

Returns:

a FileIO to read and write table data and metadata files