pulsar-broker-common/src/main/java/com/yahoo/pulsar/broker/authentication/AuthenticationProvider.java

/**
 * Copyright 2016 Yahoo Inc.
 *
 * Licensed 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 com.yahoo.pulsar.broker.authentication;

import java.io.Closeable;
import java.io.IOException;

import javax.naming.AuthenticationException;

import com.yahoo.pulsar.broker.ServiceConfiguration;

/**
 * Provider of authentication mechanism
 */
public interface AuthenticationProvider extends Closeable {

    /**
     * Perform initialization for the authentication provider
     *
     * @param config
     *            broker config object
     * @throws IOException
     *             if the initialization fails
     */
    void initialize(ServiceConfiguration config) throws IOException;

    /**
     * @return the authentication method name supported by this provider
     */
    String getAuthMethodName();

    /**
     * Validate the authentication for the given credentials with the specified authentication data
     * 
     * @param authData
     *            provider specific authentication data
     * @return the "role" string for the authenticated connection, if the authentication was successful
     * @throws AuthenticationException
     *             if the credentials are not valid
     */
    String authenticate(AuthenticationDataSource authData) throws AuthenticationException;

}