/* * 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.zeppelin.notebook.repo.zeppelinhub.model; import java.io.IOException; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentMap; import org.apache.commons.lang.StringUtils; import org.apache.zeppelin.notebook.repo.zeppelinhub.rest.ZeppelinhubRestApiHandler; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * User token manager class. * */ public class UserTokenContainer { private static final Logger LOG = LoggerFactory.getLogger(UserTokenContainer.class); private static UserTokenContainer instance = null; private ConcurrentMap<String, String> userTokens = new ConcurrentHashMap<String, String>(); private final ZeppelinhubRestApiHandler restApiClient; private String defaultToken; public static UserTokenContainer init(ZeppelinhubRestApiHandler restClient, String defaultToken) { if (instance == null) { instance = new UserTokenContainer(restClient, defaultToken); } return instance; } private UserTokenContainer(ZeppelinhubRestApiHandler restClient, String defaultToken) { restApiClient = restClient; this.defaultToken = defaultToken; } public static UserTokenContainer getInstance() { return instance; } public void setUserToken(String username, String token) { if (StringUtils.isBlank(username) || StringUtils.isBlank(token)) { LOG.warn("Can't set empty user token"); return; } userTokens.put(username, token); } public String getUserToken(String principal) { if (StringUtils.isBlank(principal) || "anonymous".equals(principal)) { if (StringUtils.isBlank(defaultToken)) { return StringUtils.EMPTY; } else { userTokens.putIfAbsent(principal, defaultToken); return defaultToken; } } String token = userTokens.get(principal); if (StringUtils.isBlank(token)) { String ticket = UserSessionContainer.instance.getSession(principal); try { token = getDefaultZeppelinInstanceToken(ticket); if (StringUtils.isBlank(token)) { if (!StringUtils.isBlank(defaultToken)) { token = defaultToken; } } else { userTokens.putIfAbsent(principal, token); } } catch (IOException e) { LOG.error("Cannot get user token", e); token = StringUtils.EMPTY; } } return token; } public String getExistingUserToken(String principal) { if (StringUtils.isBlank(principal) || "anonymous".equals(principal)) { return StringUtils.EMPTY; } String token = userTokens.get(principal); if (token == null) { return StringUtils.EMPTY; } return token; } public String removeUserToken(String username) { return userTokens.remove(username); } /** * Get user default instance. * From now, it will be from the first instance from the list, * But later we can think about marking a default one and return it instead :) */ public String getDefaultZeppelinInstanceToken(String ticket) throws IOException { List<Instance> instances = getUserInstances(ticket); if (instances.isEmpty()) { return StringUtils.EMPTY; } String token = instances.get(0).token; LOG.debug("The following instance has been assigned {} with token {}", instances.get(0).name, token); return token; } /** * Get list of user instances from Zeppelinhub. * This will avoid and remove the needs of setting up token in zeppelin-env.sh. */ public List<Instance> getUserInstances(String ticket) throws IOException { if (StringUtils.isBlank(ticket)) { return Collections.emptyList(); } return restApiClient.getInstances(ticket); } public List<String> getAllTokens() { return new ArrayList<String>(userTokens.values()); } public Map<String, String> getAllUserTokens() { return new HashMap<String, String>(userTokens); } }