| /* |
| * 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.druid.common.config; |
| |
| import com.fasterxml.jackson.core.JsonProcessingException; |
| import com.fasterxml.jackson.core.type.TypeReference; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.inject.Inject; |
| import org.apache.druid.audit.AuditInfo; |
| import org.apache.druid.audit.AuditManager; |
| import org.apache.druid.common.config.ConfigManager.SetResult; |
| import org.apache.druid.guice.annotations.Json; |
| import org.apache.druid.guice.annotations.JsonNonNull; |
| import org.apache.druid.java.util.common.jackson.JacksonUtils; |
| |
| import java.io.IOException; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| /** |
| */ |
| public class JacksonConfigManager |
| { |
| private final ConfigManager configManager; |
| private final ObjectMapper jsonMapper; |
| private final ObjectMapper jsonMapperSkipNull; |
| private final AuditManager auditManager; |
| |
| @Inject |
| public JacksonConfigManager( |
| ConfigManager configManager, |
| @Json ObjectMapper jsonMapper, |
| @JsonNonNull ObjectMapper jsonMapperOnlyNonNullValue, |
| AuditManager auditManager |
| ) |
| { |
| this.configManager = configManager; |
| this.jsonMapper = jsonMapper; |
| this.auditManager = auditManager; |
| this.jsonMapperSkipNull = jsonMapperOnlyNonNullValue; |
| } |
| |
| public <T> AtomicReference<T> watch(String key, Class<? extends T> clazz) |
| { |
| return watch(key, clazz, null); |
| } |
| |
| public <T> AtomicReference<T> watch(String key, Class<? extends T> clazz, T defaultVal) |
| { |
| return configManager.watchConfig(key, create(clazz, defaultVal)); |
| } |
| |
| public <T> AtomicReference<T> watch(String key, TypeReference<T> clazz, T defaultVal) |
| { |
| return configManager.watchConfig(key, create(clazz, defaultVal)); |
| } |
| |
| public <T> SetResult set(String key, T val, AuditInfo auditInfo) |
| { |
| ConfigSerde configSerde = create(val.getClass(), null); |
| // Audit and actual config change are done in separate transactions |
| // there can be phantom audits and reOrdering in audit changes as well. |
| auditManager.doAudit(key, key, auditInfo, val, configSerde); |
| return configManager.set(key, configSerde, val); |
| } |
| |
| @VisibleForTesting |
| <T> ConfigSerde<T> create(final Class<? extends T> clazz, final T defaultVal) |
| { |
| return new ConfigSerde<T>() |
| { |
| @Override |
| public byte[] serialize(T obj) |
| { |
| try { |
| return jsonMapper.writeValueAsBytes(obj); |
| } |
| catch (JsonProcessingException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public String serializeToString(T obj, boolean skipNull) |
| { |
| try { |
| return skipNull ? jsonMapperSkipNull.writeValueAsString(obj) : jsonMapper.writeValueAsString(obj); |
| } |
| catch (JsonProcessingException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public T deserialize(byte[] bytes) |
| { |
| if (bytes == null) { |
| return defaultVal; |
| } |
| |
| return JacksonUtils.readValue(jsonMapper, bytes, clazz); |
| } |
| }; |
| } |
| |
| @VisibleForTesting |
| <T> ConfigSerde<T> create(final TypeReference<? extends T> clazz, final T defaultVal) |
| { |
| return new ConfigSerde<T>() |
| { |
| @Override |
| public byte[] serialize(T obj) |
| { |
| try { |
| return jsonMapper.writeValueAsBytes(obj); |
| } |
| catch (JsonProcessingException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public String serializeToString(T obj, boolean skipNull) |
| { |
| try { |
| return skipNull ? jsonMapperSkipNull.writeValueAsString(obj) : jsonMapper.writeValueAsString(obj); |
| } |
| catch (JsonProcessingException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public T deserialize(byte[] bytes) |
| { |
| if (bytes == null) { |
| return defaultVal; |
| } |
| |
| try { |
| return jsonMapper.readValue(bytes, clazz); |
| } |
| catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| }; |
| } |
| } |