spark AuthenticationProviderFactory 源码

2022-10-20
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spark AuthenticationProviderFactory 代码

文件路径：/sql/hive-thriftserver/src/main/java/org/apache/hive/service/auth/AuthenticationProviderFactory.java

/*
 * 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.hive.service.auth;

import javax.security.sasl.AuthenticationException;

/**
 * This class helps select a {@link PasswdAuthenticationProvider} for a given {@code AuthMethod}.
 */
public final class AuthenticationProviderFactory {

  public enum AuthMethods {
    LDAP("LDAP"),
    PAM("PAM"),
    CUSTOM("CUSTOM"),
    NONE("NONE");

    private final String authMethod;

    AuthMethods(String authMethod) {
      this.authMethod = authMethod;
    }

    public String getAuthMethod() {
      return authMethod;
    }

    public static AuthMethods getValidAuthMethod(String authMethodStr)
      throws AuthenticationException {
      for (AuthMethods auth : AuthMethods.values()) {
        if (authMethodStr.equals(auth.getAuthMethod())) {
          return auth;
        }
      }
      throw new AuthenticationException("Not a valid authentication method");
    }
  }

  private AuthenticationProviderFactory() {
  }

  public static PasswdAuthenticationProvider getAuthenticationProvider(AuthMethods authMethod)
    throws AuthenticationException {
    if (authMethod == AuthMethods.LDAP) {
      return new LdapAuthenticationProviderImpl();
    } else if (authMethod == AuthMethods.PAM) {
      return new PamAuthenticationProviderImpl();
    } else if (authMethod == AuthMethods.CUSTOM) {
      return new CustomAuthenticationProviderImpl();
    } else if (authMethod == AuthMethods.NONE) {
      return new AnonymousAuthenticationProviderImpl();
    } else {
      throw new AuthenticationException("Unsupported authentication method");
    }
  }
}

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