001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019package org.apache.oozie.action.hadoop; 020 021import org.apache.hadoop.conf.Configuration; 022import org.apache.hadoop.security.Credentials; 023import org.apache.oozie.action.ActionExecutor.Context; 024 025public interface CredentialsProvider { 026 027 /** 028 * This is the interface for all the Credentials implementation. Any new credential implementation must implement 029 * this function. This function should modify the configuration which will be used further to pass the credentials to the 030 * tasks while running it. Credentials properties and context is also provided by that user can get all the 031 * necessary configuration. 032 * 033 * @param credentials the credentials object which is updated 034 * @param config launcher AM configuration 035 * @param props properties for getting credential token or certificate 036 * @param context workflow context 037 * @throws Exception thrown if failed 038 * 039 */ 040 public void updateCredentials(Credentials credentials, Configuration config, CredentialsProperties props, Context context) 041 throws Exception; 042}