| // Copyright (C) 2015 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.multisite; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.CaseFormat; |
| import com.google.common.base.Strings; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.gerrit.extensions.annotations.PluginName; |
| import com.google.gerrit.server.config.PluginConfigFactory; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import com.googlesource.gerrit.plugins.multisite.forwarder.events.EventFamily; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Properties; |
| import java.util.UUID; |
| import org.apache.kafka.common.serialization.StringSerializer; |
| import org.eclipse.jgit.lib.Config; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Singleton |
| public class Configuration { |
| private static final Logger log = LoggerFactory.getLogger(Configuration.class); |
| |
| static final String INSTANCE_ID_FILE = "instanceId.data"; |
| |
| // common parameters to cache and index sections |
| static final String THREAD_POOL_SIZE_KEY = "threadPoolSize"; |
| |
| static final int DEFAULT_INDEX_MAX_TRIES = 2; |
| static final int DEFAULT_INDEX_RETRY_INTERVAL = 30000; |
| private static final int DEFAULT_POLLING_INTERVAL_MS = 1000; |
| static final int DEFAULT_THREAD_POOL_SIZE = 4; |
| static final String NUM_STRIPED_LOCKS = "numStripedLocks"; |
| static final int DEFAULT_NUM_STRIPED_LOCKS = 10; |
| static final String ENABLE_KEY = "enabled"; |
| static final String DEFAULT_KAFKA_BOOTSTRAP_SERVERS = "localhost:9092"; |
| static final boolean DEFAULT_ENABLE_PROCESSING = true; |
| static final String KAFKA_SECTION = "kafka"; |
| public static final String KAFKA_PROPERTY_PREFIX = "KafkaProp-"; |
| |
| private final KafkaPublisher publisher; |
| private final Cache cache; |
| private final Event event; |
| private final Index index; |
| private final KafkaSubscriber subscriber; |
| private final Kafka kafka; |
| |
| @Inject |
| Configuration(PluginConfigFactory pluginConfigFactory, @PluginName String pluginName) { |
| this(pluginConfigFactory.getGlobalPluginConfig(pluginName)); |
| } |
| |
| @VisibleForTesting |
| public Configuration(Config cfg) { |
| kafka = new Kafka(cfg); |
| publisher = new KafkaPublisher(cfg); |
| subscriber = new KafkaSubscriber(cfg); |
| cache = new Cache(cfg); |
| event = new Event(cfg); |
| index = new Index(cfg); |
| } |
| |
| public Kafka getKafka() { |
| return kafka; |
| } |
| |
| public KafkaPublisher kafkaPublisher() { |
| return publisher; |
| } |
| |
| public Cache cache() { |
| return cache; |
| } |
| |
| public Event event() { |
| return event; |
| } |
| |
| public Index index() { |
| return index; |
| } |
| |
| public KafkaSubscriber kafkaSubscriber() { |
| return subscriber; |
| } |
| |
| private static int getInt(Config cfg, String section, String name, int defaultValue) { |
| try { |
| return cfg.getInt(section, name, defaultValue); |
| } catch (IllegalArgumentException e) { |
| log.error("invalid value for {}; using default value {}", name, defaultValue); |
| log.debug("Failed to retrieve integer value: {}", e.getMessage(), e); |
| return defaultValue; |
| } |
| } |
| |
| private static String getString( |
| Config cfg, String section, String subsection, String name, String defaultValue) { |
| String value = cfg.getString(section, subsection, name); |
| if (!Strings.isNullOrEmpty(value)) { |
| return value; |
| } |
| return defaultValue; |
| } |
| |
| private static Map<EventFamily, Boolean> eventsEnabled(Config config, String subsection) { |
| Map<EventFamily, Boolean> eventsEnabled = new HashMap<>(); |
| for (EventFamily eventFamily : EventFamily.values()) { |
| String enabledConfigKey = eventFamily.lowerCamelName() + "Enabled"; |
| |
| eventsEnabled.put( |
| eventFamily, |
| config.getBoolean( |
| KAFKA_SECTION, subsection, enabledConfigKey, DEFAULT_ENABLE_PROCESSING)); |
| } |
| return eventsEnabled; |
| } |
| |
| private static void applyKafkaConfig(Config config, String subsectionName, Properties target) { |
| for (String section : config.getSubsections(KAFKA_SECTION)) { |
| if (section.equals(subsectionName)) { |
| for (String name : config.getNames(KAFKA_SECTION, section, true)) { |
| if (name.startsWith(KAFKA_PROPERTY_PREFIX)) { |
| Object value = config.getString(KAFKA_SECTION, subsectionName, name); |
| String configProperty = name.replaceFirst(KAFKA_PROPERTY_PREFIX, ""); |
| String propName = |
| CaseFormat.LOWER_CAMEL |
| .to(CaseFormat.LOWER_HYPHEN, configProperty) |
| .replaceAll("-", "."); |
| log.info("[{}] Setting kafka property: {} = {}", subsectionName, propName, value); |
| target.put(propName, value); |
| } |
| } |
| } |
| } |
| target.put( |
| "bootstrap.servers", |
| getString( |
| config, KAFKA_SECTION, null, "bootstrapServers", DEFAULT_KAFKA_BOOTSTRAP_SERVERS)); |
| } |
| |
| public static class Kafka { |
| private final Map<EventFamily, String> eventTopics; |
| private final String bootstrapServers; |
| |
| private static final Map<EventFamily, String> EVENT_TOPICS = |
| ImmutableMap.of( |
| EventFamily.INDEX_EVENT, "GERRIT.EVENT.INDEX", |
| EventFamily.STREAM_EVENT, "GERRIT.EVENT.STREAM", |
| EventFamily.CACHE_EVENT, "GERRIT.EVENT.CACHE", |
| EventFamily.PROJECT_LIST_EVENT, "GERRIT.EVENT.PROJECT.LIST"); |
| |
| Kafka(Config config) { |
| this.bootstrapServers = |
| getString( |
| config, KAFKA_SECTION, null, "bootstrapServers", DEFAULT_KAFKA_BOOTSTRAP_SERVERS); |
| |
| this.eventTopics = new HashMap<>(); |
| for (Map.Entry<EventFamily, String> topicDefault : EVENT_TOPICS.entrySet()) { |
| String topicConfigKey = topicDefault.getKey().lowerCamelName() + "Topic"; |
| eventTopics.put( |
| topicDefault.getKey(), |
| getString(config, KAFKA_SECTION, null, topicConfigKey, topicDefault.getValue())); |
| } |
| } |
| |
| public String getTopic(EventFamily eventType) { |
| return eventTopics.get(eventType); |
| } |
| |
| public String getBootstrapServers() { |
| return bootstrapServers; |
| } |
| } |
| |
| public static class KafkaPublisher extends Properties { |
| private static final long serialVersionUID = 0L; |
| |
| public static final String KAFKA_STRING_SERIALIZER = StringSerializer.class.getName(); |
| |
| public static final String KAFKA_PUBLISHER_SUBSECTION = "publisher"; |
| public static final boolean DEFAULT_BROKER_ENABLED = false; |
| |
| private final boolean enabled; |
| private final Map<EventFamily, Boolean> eventsEnabled; |
| |
| private KafkaPublisher(Config cfg) { |
| enabled = |
| cfg.getBoolean( |
| KAFKA_SECTION, KAFKA_PUBLISHER_SUBSECTION, ENABLE_KEY, DEFAULT_BROKER_ENABLED); |
| |
| eventsEnabled = eventsEnabled(cfg, KAFKA_PUBLISHER_SUBSECTION); |
| |
| if (enabled) { |
| setDefaults(); |
| applyKafkaConfig(cfg, KAFKA_PUBLISHER_SUBSECTION, this); |
| } |
| } |
| |
| 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); |
| } |
| |
| public boolean enabled() { |
| return enabled; |
| } |
| |
| public boolean enabledEvent(EventFamily eventType) { |
| return eventsEnabled.get(eventType); |
| } |
| } |
| |
| public class KafkaSubscriber extends Properties { |
| private static final long serialVersionUID = 1L; |
| |
| static final String KAFKA_SUBSCRIBER_SUBSECTION = "subscriber"; |
| |
| private final boolean enabled; |
| private final Integer pollingInterval; |
| private Map<EventFamily, Boolean> eventsEnabled; |
| private final Config cfg; |
| |
| public KafkaSubscriber(Config cfg) { |
| this.pollingInterval = |
| cfg.getInt( |
| KAFKA_SECTION, |
| KAFKA_SUBSCRIBER_SUBSECTION, |
| "pollingIntervalMs", |
| DEFAULT_POLLING_INTERVAL_MS); |
| this.cfg = cfg; |
| |
| enabled = cfg.getBoolean(KAFKA_SECTION, KAFKA_SUBSCRIBER_SUBSECTION, ENABLE_KEY, false); |
| |
| eventsEnabled = eventsEnabled(cfg, KAFKA_SUBSCRIBER_SUBSECTION); |
| |
| if (enabled) { |
| applyKafkaConfig(cfg, KAFKA_SUBSCRIBER_SUBSECTION, this); |
| } |
| } |
| |
| public boolean enabled() { |
| return enabled; |
| } |
| |
| public boolean enabledEvent(EventFamily eventFamily) { |
| return eventsEnabled.get(eventFamily); |
| } |
| |
| public Properties initPropsWith(UUID instanceId) { |
| String groupId = |
| getString( |
| cfg, KAFKA_SECTION, KAFKA_SUBSCRIBER_SUBSECTION, "groupId", instanceId.toString()); |
| this.put("group.id", groupId); |
| |
| return this; |
| } |
| |
| public Integer getPollingInterval() { |
| return pollingInterval; |
| } |
| |
| private String getString( |
| Config cfg, String section, String subsection, String name, String defaultValue) { |
| String value = cfg.getString(section, subsection, name); |
| if (!Strings.isNullOrEmpty(value)) { |
| return value; |
| } |
| return defaultValue; |
| } |
| } |
| |
| /** Common parameters to cache, event, index */ |
| public abstract static class Forwarding { |
| static final boolean DEFAULT_SYNCHRONIZE = true; |
| static final String SYNCHRONIZE_KEY = "synchronize"; |
| |
| private final boolean synchronize; |
| |
| private Forwarding(Config cfg, String section) { |
| synchronize = getBoolean(cfg, section, SYNCHRONIZE_KEY, DEFAULT_SYNCHRONIZE); |
| } |
| |
| private static boolean getBoolean( |
| Config cfg, String section, String name, boolean defaultValue) { |
| try { |
| return cfg.getBoolean(section, name, defaultValue); |
| } catch (IllegalArgumentException e) { |
| log.error("invalid value for {}; using default value {}", name, defaultValue); |
| log.debug("Failed to retrieve boolean value: {}", e.getMessage(), e); |
| return defaultValue; |
| } |
| } |
| |
| public boolean synchronize() { |
| return synchronize; |
| } |
| } |
| |
| public static class Cache extends Forwarding { |
| static final String CACHE_SECTION = "cache"; |
| static final String PATTERN_KEY = "pattern"; |
| |
| private final int threadPoolSize; |
| private final List<String> patterns; |
| |
| private Cache(Config cfg) { |
| super(cfg, CACHE_SECTION); |
| threadPoolSize = getInt(cfg, CACHE_SECTION, THREAD_POOL_SIZE_KEY, DEFAULT_THREAD_POOL_SIZE); |
| patterns = Arrays.asList(cfg.getStringList(CACHE_SECTION, null, PATTERN_KEY)); |
| } |
| |
| public int threadPoolSize() { |
| return threadPoolSize; |
| } |
| |
| public List<String> patterns() { |
| return Collections.unmodifiableList(patterns); |
| } |
| } |
| |
| public static class Event extends Forwarding { |
| static final String EVENT_SECTION = "event"; |
| |
| private Event(Config cfg) { |
| super(cfg, EVENT_SECTION); |
| } |
| } |
| |
| public static class Index extends Forwarding { |
| static final String INDEX_SECTION = "index"; |
| static final String MAX_TRIES_KEY = "maxTries"; |
| static final String RETRY_INTERVAL_KEY = "retryInterval"; |
| |
| private final int threadPoolSize; |
| private final int retryInterval; |
| private final int maxTries; |
| |
| private final int numStripedLocks; |
| |
| private Index(Config cfg) { |
| super(cfg, INDEX_SECTION); |
| threadPoolSize = getInt(cfg, INDEX_SECTION, THREAD_POOL_SIZE_KEY, DEFAULT_THREAD_POOL_SIZE); |
| retryInterval = getInt(cfg, INDEX_SECTION, RETRY_INTERVAL_KEY, DEFAULT_INDEX_RETRY_INTERVAL); |
| maxTries = getInt(cfg, INDEX_SECTION, MAX_TRIES_KEY, DEFAULT_INDEX_MAX_TRIES); |
| numStripedLocks = getInt(cfg, INDEX_SECTION, NUM_STRIPED_LOCKS, DEFAULT_NUM_STRIPED_LOCKS); |
| } |
| |
| public int threadPoolSize() { |
| return threadPoolSize; |
| } |
| |
| public int retryInterval() { |
| return retryInterval; |
| } |
| |
| public int maxTries() { |
| return maxTries; |
| } |
| |
| public int numStripedLocks() { |
| return numStripedLocks; |
| } |
| } |
| } |