| // Copyright (C) 2016 The Android Open Source Project |
| // |
| // Licensed 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 com.googlesource.gerrit.plugins.kafka.config; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.CaseFormat; |
| import com.google.common.base.Strings; |
| import com.google.gerrit.extensions.annotations.PluginName; |
| import com.google.gerrit.server.config.PluginConfig; |
| import com.google.gerrit.server.config.PluginConfigFactory; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import java.util.UUID; |
| import org.apache.kafka.clients.consumer.ConsumerConfig; |
| import org.apache.kafka.clients.producer.ProducerConfig; |
| import org.apache.kafka.common.serialization.StringSerializer; |
| |
| @Singleton |
| public class KafkaProperties extends java.util.Properties { |
| private static final long serialVersionUID = 0L; |
| |
| public static final String KAFKA_STRING_SERIALIZER = StringSerializer.class.getName(); |
| |
| private final String topic; |
| |
| @Inject |
| public KafkaProperties(PluginConfigFactory configFactory, @PluginName String pluginName) { |
| super(); |
| setDefaults(); |
| PluginConfig fromGerritConfig = configFactory.getFromGerritConfig(pluginName); |
| topic = fromGerritConfig.getString("topic", "gerrit"); |
| applyConfig(fromGerritConfig); |
| initDockerizedKafkaServer(); |
| } |
| |
| @VisibleForTesting |
| public KafkaProperties() { |
| super(); |
| setDefaults(); |
| topic = "gerrit"; |
| initDockerizedKafkaServer(); |
| } |
| |
| private void setDefaults() { |
| put("acks", "all"); |
| put("retries", 0); |
| put("batch.size", 16384); |
| put("linger.ms", 1); |
| put("buffer.memory", 33554432); |
| put("key.serializer", KAFKA_STRING_SERIALIZER); |
| put("value.serializer", KAFKA_STRING_SERIALIZER); |
| put("reconnect.backoff.ms", 5000L); |
| } |
| |
| private void applyConfig(PluginConfig config) { |
| for (String name : config.getNames()) { |
| Object value = config.getString(name); |
| String propName = |
| CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_HYPHEN, name).replaceAll("-", "."); |
| put(propName, value); |
| } |
| } |
| |
| /** Bootstrap initialization of dockerized Kafka server environment */ |
| private void initDockerizedKafkaServer() { |
| String testBootstrapServer = System.getProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG); |
| if (!Strings.isNullOrEmpty(testBootstrapServer)) { |
| this.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, testBootstrapServer); |
| this.put(ProducerConfig.CLIENT_ID_CONFIG, UUID.randomUUID().toString()); |
| this.put(ConsumerConfig.GROUP_ID_CONFIG, "tc-" + UUID.randomUUID()); |
| this.put(ConsumerConfig.HEARTBEAT_INTERVAL_MS_CONFIG, "1000"); |
| this.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest"); |
| } |
| } |
| |
| public String getTopic() { |
| return topic; |
| } |
| |
| public String getBootstrapServers() { |
| return getProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG); |
| } |
| } |