jerryshao commented on code in PR #5690: URL: https://github.com/apache/gravitino/pull/5690#discussion_r1867406301
########## api/src/main/java/org/apache/gravitino/credential/SupportsCredentials.java: ########## @@ -0,0 +1,47 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.gravitino.credential; + +import java.util.Optional; +import org.apache.gravitino.exceptions.NoSuchCredentialException; + +/** Interface to get credentials. */ +public interface SupportsCredentials { + /** + * Retrieves an array of {@link Credential} objects based on the specified credential type, like + * s3-token, s3-secret-key which defined in the specific credentials. + * + * @param credentialType The server will return credentials according to the configuration if + * credential type is empty, or else will return the credential with the specified credential + * type. + * @return An array of {@link Credential} objects. If the {@code credentialType} is not empty, + * there will be at most one credential in the array. If empty, in most cases the array only + * contains one credential. If the object like {@link org.apache.gravitino.file.Fileset} + * contains multi locations for different storages like HDFS, S3, the array will contain multi + * credentials. The array could be empty if you request a credential for a catalog but the + * credential provider couldn't generate the credential for the catalog, like S3 token + * credential provider only generate credential for the specific object like {@link + * org.apache.gravitino.file.Fileset}, {@link org.apache.gravitino.rel.Table}. There will be + * at most one credential for one credential type. + * @throws NoSuchCredentialException If the specified credential type cannot be found in the + * server side. + */ + Credential[] getCredentials(Optional<String> credentialType) throws NoSuchCredentialException; Review Comment: I would suggest using two interfaces: ``` Credentials[] getCredentials(); Credentials getCredentials(String credentialType) ``` The second interface can have a default implementation and be implemented based on the first one. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
