Package org.apache.flink.table.catalog

Class FileCatalogStore

java.lang.Object

org.apache.flink.table.catalog.AbstractCatalogStore

org.apache.flink.table.catalog.FileCatalogStore

All Implemented Interfaces:

CatalogStore

@Internal
public class FileCatalogStore
extends AbstractCatalogStore

A CatalogStore that stores all catalog configuration to a directory. Configuration of every catalog will be saved into a single file. The file name will be {catalogName}.yaml by default.

Field Summary

Fields inherited from class org.apache.flink.table.catalog.AbstractCatalogStore

isOpen

Constructor Summary

Constructors

Constructor	Description
FileCatalogStore(String catalogStorePath)	Creates a new FileCatalogStore instance with the specified directory path.

Method Summary

Modifier and Type	Method	Description
boolean	contains(String catalogName)	Returns whether the specified catalog exists in the catalog store.
Optional<CatalogDescriptor>	getCatalog(String catalogName)	Returns the catalog descriptor for the specified catalog, if it exists in the catalog store.
Set<String>	listCatalogs()	Returns a set of all catalog names in the catalog store.
void	open()	Opens the catalog store and initializes the catalog file map.
void	removeCatalog(String catalogName, boolean ignoreIfNotExists)	Removes the specified catalog from the catalog store.
void	storeCatalog(String catalogName, CatalogDescriptor catalog)	Stores the specified catalog in the catalog store.

Methods inherited from class org.apache.flink.table.catalog.AbstractCatalogStore

checkOpenState, close

Methods inherited from class java.lang.Object

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

Constructor Detail

FileCatalogStore

public FileCatalogStore(String catalogStorePath)

Creates a new FileCatalogStore instance with the specified directory path.

Parameters:

catalogStorePath - the directory path where catalog configurations will be stored

Method Detail

open

public void open()
          throws CatalogException

Opens the catalog store and initializes the catalog file map.

Specified by:

open in interface CatalogStore

Overrides:

open in class AbstractCatalogStore

Throws:

CatalogException - if the catalog store directory does not exist, not a directory, or if there is an error reading the directory

storeCatalog

public void storeCatalog(String catalogName,
                         CatalogDescriptor catalog)
                  throws CatalogException

Stores the specified catalog in the catalog store.

Parameters:

catalogName - the name of the catalog

catalog - the catalog descriptor to store

Throws:

CatalogException - if the catalog store is not open or if there is an error storing the catalog

removeCatalog

public void removeCatalog(String catalogName,
                          boolean ignoreIfNotExists)
                   throws CatalogException

Removes the specified catalog from the catalog store.

Parameters:

catalogName - the name of the catalog to remove

ignoreIfNotExists - whether to ignore if the catalog does not exist in the catalog store

Throws:

CatalogException - if the catalog store is not open or if there is an error removing the catalog

getCatalog

public Optional<CatalogDescriptor> getCatalog(String catalogName)
                                       throws CatalogException

Returns the catalog descriptor for the specified catalog, if it exists in the catalog store.

Parameters:

catalogName - the name of the catalog to retrieve

Returns:

an Optional containing the catalog descriptor, or an empty Optional if the catalog does not exist in the catalog store

Throws:

CatalogException - if the catalog store is not open or if there is an error retrieving the catalog

listCatalogs

public Set<String> listCatalogs()
                         throws CatalogException

Returns a set of all catalog names in the catalog store.

Returns:

a set of all catalog names in the catalog store

Throws:

CatalogException - if the catalog store is not open or if there is an error retrieving the list of catalog names

contains

public boolean contains(String catalogName)
                 throws CatalogException

Returns whether the specified catalog exists in the catalog store.

Parameters:

catalogName - the name of the catalog to check

Returns:

true if the catalog exists in the catalog store, false otherwise

Throws:

CatalogException - if the catalog store is not open or if there is an error checking for the catalog