| /* |
| * 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.atlas.authorize; |
| |
| import org.apache.atlas.ApplicationProperties; |
| import org.apache.atlas.AtlasException; |
| import org.apache.commons.configuration.Configuration; |
| import org.apache.commons.lang.StringUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class AtlasAuthorizerFactory { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(AtlasAuthorizerFactory.class); |
| private static final String SIMPLE_AUTHORIZER = "org.apache.atlas.authorize.simple.SimpleAtlasAuthorizer"; |
| private static final String RANGER_AUTHORIZER = |
| "org.apache.ranger.authorization.atlas.authorizer.RangerAtlasAuthorizer"; |
| private static volatile AtlasAuthorizer INSTANCE = null; |
| private static boolean isDebugEnabled = LOG.isDebugEnabled(); |
| |
| public static AtlasAuthorizer getAtlasAuthorizer() throws AtlasAuthorizationException { |
| Configuration configuration = null; |
| try { |
| configuration = ApplicationProperties.get(); |
| } catch (AtlasException e) { |
| if (LOG.isErrorEnabled()) { |
| LOG.error("Exception while fetching configuration. ", e); |
| } |
| } |
| AtlasAuthorizer ret = INSTANCE; |
| |
| if (ret == null) { |
| synchronized (AtlasAuthorizerFactory.class) { |
| if (INSTANCE == null) { |
| String authorizerClass = |
| configuration != null ? configuration.getString("atlas.authorizer.impl") : "SIMPLE"; |
| |
| if (StringUtils.isNotEmpty(authorizerClass)) { |
| if (StringUtils.equalsIgnoreCase(authorizerClass, "SIMPLE")) { |
| authorizerClass = SIMPLE_AUTHORIZER; |
| } else if (StringUtils.equalsIgnoreCase(authorizerClass, "RANGER")) { |
| authorizerClass = RANGER_AUTHORIZER; |
| } |
| } else { |
| authorizerClass = SIMPLE_AUTHORIZER; |
| } |
| |
| if (isDebugEnabled) { |
| LOG.debug("Initializing Authorizer :: {}", authorizerClass); |
| } |
| try { |
| Class authorizerMetaObject = Class.forName(authorizerClass); |
| if (authorizerMetaObject != null) { |
| INSTANCE = (AtlasAuthorizer) authorizerMetaObject.newInstance(); |
| } |
| } catch (Exception e) { |
| LOG.error("Error while creating authorizer of type '{}", authorizerClass, e); |
| throw new AtlasAuthorizationException("Error while creating authorizer of type '" |
| + authorizerClass + "'", e); |
| } |
| ret = INSTANCE; |
| } |
| } |
| } |
| return ret; |
| } |
| |
| } |