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/*
 * 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.nifi.kerberos;

import java.io.File;

public interface KerberosContext {

    /**
     * The Kerberos service principal used by NiFi to communicate with the KDC
     * in order to obtain tickets on behalf of NiFi. Typically of the form
     * NIFI/fully.qualified.domain@REALM.
     *
     * @return the principal, or null if this NiFi instance is not configured
     * with a NiFi Kerberos service principal
     */
    String getKerberosServicePrincipal();

    /**
     * The File instance for the Kerberos service keytab. The service principal
     * and service keytab will be used to communicate with the KDC to obtain
     * tickets on behalf of NiFi.
     *
     * @return the File instance of the service keytab, or null if this NiFi
     * instance is not configured with a NiFi Kerberos service keytab
     */
    File getKerberosServiceKeytab();

    /**
     * The Kerberos configuration file (typically krb5.conf) that will be used
     * by this JVM during all Kerberos operations.
     *
     * @return the File instance for the Kerberos configuration file, or null if
     * this NiFi instance is not configured with a Kerberos configuration file
     */
    File getKerberosConfigurationFile();
}