| /* |
| * 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.cassandra.security; |
| |
| import java.io.IOException; |
| import java.security.Key; |
| |
| /** |
| * Customizable key retrieval mechanism. Implementations should expect that retrieved keys will be cached. |
| * Further, each key will be requested non-concurrently (that is, no stampeding herds for the same key), although |
| * unique keys may be requested concurrently (unless you mark {@code getSecretKey} synchronized). |
| * |
| * Implementations must provide a constructor that accepts {@code TransparentDataEncryptionOptions} as the sole parameter. |
| */ |
| public interface KeyProvider |
| { |
| Key getSecretKey(String alias) throws IOException; |
| } |