| /** |
| * 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.ambari.server.api.services; |
| |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import com.google.inject.persist.Transactional; |
| import org.apache.ambari.server.orm.dao.KeyValueDAO; |
| import org.apache.ambari.server.orm.entities.KeyValueEntity; |
| |
| import javax.ws.rs.WebApplicationException; |
| import javax.ws.rs.core.Response; |
| import java.util.*; |
| |
| @Singleton |
| public class PersistKeyValueImpl { |
| |
| @Inject |
| KeyValueDAO keyValueDAO; |
| |
| public String generateKey() { |
| return UUID.randomUUID().toString(); |
| } |
| |
| public Collection<String> generateKeys(int number) { |
| List<String> keys = new ArrayList<String>(number); |
| for (int i = 0; i < number; i++) { |
| keys.add(generateKey()); |
| } |
| return keys; |
| } |
| |
| public synchronized String getValue(String key) { |
| KeyValueEntity keyValueEntity = keyValueDAO.findByKey(key); |
| if (keyValueEntity != null) { |
| return keyValueEntity.getValue(); |
| } |
| throw new WebApplicationException(Response.Status.NOT_FOUND); |
| } |
| |
| public synchronized String put(String value) { |
| String key = generateKey(); |
| put(key, value); |
| return key; |
| } |
| |
| @Transactional |
| public synchronized void put(String key, String value) { |
| KeyValueEntity keyValueEntity = keyValueDAO.findByKey(key); |
| if (keyValueEntity != null) { |
| keyValueEntity.setValue(value); |
| keyValueDAO.merge(keyValueEntity); |
| } else { |
| keyValueEntity = new KeyValueEntity(); |
| keyValueEntity.setKey(key); |
| keyValueEntity.setValue(value); |
| keyValueDAO.create(keyValueEntity); |
| } |
| } |
| |
| public synchronized Map<String, String> getAllKeyValues() { |
| Map<String, String> map = new HashMap<String, String>(); |
| for (KeyValueEntity keyValueEntity : keyValueDAO.findAll()) { |
| map.put(keyValueEntity.getKey(), keyValueEntity.getValue()); |
| } |
| return map; |
| } |
| } |