content: /*
   * 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.celeborn.common.network.sasl;
  
  import java.util.concurrent.ConcurrentHashMap;
  
  import org.apache.celeborn.common.util.JavaUtils;
  
  /** A simple implementation of {@link SecretRegistry} that stores secrets in memory. */
  public class SecretRegistryImpl implements SecretRegistry {
  
    private final ConcurrentHashMap<String, String> secrets = JavaUtils.newConcurrentHashMap();
  
    @Override
    public void register(String appId, String secret) {
      secrets.compute(
          appId,
          (id, oldVal) -> {
            if (oldVal != null) {
              throw new IllegalArgumentException("AppId " + appId + " is already registered.");
            }
            return secret;
          });
    }
  
    @Override
    public void unregister(String appId) {
      secrets.remove(appId);
    }
  
    @Override
    public boolean isRegistered(String appId) {
      return secrets.containsKey(appId);
    }
  
    /** Gets an appropriate SASL secret key for the given appId. */
    @Override
    public String getSecretKey(String appId) {
      return secrets.get(appId);
    }
  }
  