Initial stable-2.16 commit from kafka-events repo
Change-Id: Ib67b0c7a3744bc7edd12c79e765cba85bd6974d1
diff --git a/BUILD b/BUILD
new file mode 100644
index 0000000..ba9f702
--- /dev/null
+++ b/BUILD
@@ -0,0 +1,48 @@
+load("//tools/bzl:junit.bzl", "junit_tests")
+load(
+ "//tools/bzl:plugin.bzl",
+ "PLUGIN_DEPS",
+ "PLUGIN_TEST_DEPS",
+ "gerrit_plugin",
+)
+
+gerrit_plugin(
+ name = "events-kafka",
+ srcs = glob(["src/main/java/**/*.java"]),
+ manifest_entries = [
+ "Gerrit-PluginName: events-kafka",
+ "Gerrit-Module: com.googlesource.gerrit.plugins.kafka.Module",
+ "Implementation-Title: Gerrit Apache Kafka plugin",
+ "Implementation-URL: https://gerrit.googlesource.com/plugins/events-kafka",
+ ],
+ resources = glob(["src/main/resources/**/*"]),
+ deps = [
+ "@kafka_client//jar",
+ ],
+)
+
+junit_tests(
+ name = "events_kafka_tests",
+ srcs = glob(["src/test/java/**/*.java"]),
+ tags = ["events-kafka"],
+ deps = [
+ ":events-kafka__plugin_test_deps",
+ "//lib/testcontainers",
+ "@kafka_client//jar",
+ "@testcontainers-kafka//jar",
+ ],
+)
+
+java_library(
+ name = "events-kafka__plugin_test_deps",
+ testonly = 1,
+ visibility = ["//visibility:public"],
+ exports = PLUGIN_DEPS + PLUGIN_TEST_DEPS + [
+ ":events-kafka__plugin",
+ "@testcontainers-kafka//jar",
+ "//lib/jackson:jackson-annotations",
+ "//lib/testcontainers",
+ "//lib/testcontainers:docker-java-api",
+ "//lib/testcontainers:docker-java-transport",
+ ],
+)
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..11069ed
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..781ed57
--- /dev/null
+++ b/README.md
@@ -0,0 +1,58 @@
+Kafka: Gerrit event producer for Apache Kafka
+=======================
+
+* Author: GerritForge
+* Repository: https://gerrit.googlesource.com/plugins/events-kafka
+* CI/Release: https://gerrit-ci.gerritforge.com/search/?q=events-kafka
+
+[](https://gerrit-ci.gerritforge.com/job/plugin-events-kafka-bazel-master/lastBuild/)
+
+Synopsis
+----------------------
+
+This plugins allows to define a distributed stream of events
+published by Gerrit.
+
+Events can be anything, from the traditional stream events
+to the Gerrit metrics.
+
+This plugin requires Gerrit 2.13 or laster.
+
+Environments
+---------------------
+
+* `linux`
+* `java-1.8`
+* `Bazel`
+
+Build
+---------------------
+Kafka plugin can be build as a regular 'in-tree' plugin. That means that is required to
+clone a Gerrit source tree first and then to have the Kafka plugin source directory into
+the /plugins path. Additionally, the plugins/external_plugin_deps.bzl file needs to be
+updated to match the Kafka plugin one.
+
+ git clone --recursive https://gerrit.googlesource.com/gerrit
+ git clone https://gerrit.googlesource.com/plugins/events-kafka gerrit/plugins/events-kafka
+ cd gerrit
+ rm plugins/external_plugin_deps.bzl
+ ln -s ./events-kafka/external_plugin_deps.bzl plugins/.
+
+To build the events-kafka plugins, issue the command from the Gerrit source path:
+
+ bazel build plugins/events-kafka
+
+The output is created in
+
+ bazel-genfiles/plugins/events-kafka/events-kafka.jar
+
+Minimum Configuration
+---------------------
+Assuming a running Kafka broker on the same Gerrit host, add the following
+settings to gerrit.config:
+
+```
+ [plugin "events-kafka"]
+ bootstrapServers = localhost:9092
+```
+
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
new file mode 100644
index 0000000..197cbed
--- /dev/null
+++ b/external_plugin_deps.bzl
@@ -0,0 +1,14 @@
+load("//tools/bzl:maven_jar.bzl", "maven_jar")
+
+def external_plugin_deps():
+ maven_jar(
+ name = "kafka_client",
+ artifact = "org.apache.kafka:kafka-clients:2.1.0",
+ sha1 = "34d9983705c953b97abb01e1cd04647f47272fe5",
+ )
+
+ maven_jar(
+ name = "testcontainers-kafka",
+ artifact = "org.testcontainers:kafka:1.15.0",
+ sha1 = "d34760b11ab656e08b72c1e2e9b852f037a89f90",
+ )
diff --git a/src/main/java/com/googlesource/gerrit/plugins/kafka/Manager.java b/src/main/java/com/googlesource/gerrit/plugins/kafka/Manager.java
new file mode 100644
index 0000000..b20b312
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/kafka/Manager.java
@@ -0,0 +1,41 @@
+// 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;
+
+import com.google.gerrit.extensions.events.LifecycleListener;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import com.googlesource.gerrit.plugins.kafka.publish.KafkaPublisher;
+
+@Singleton
+public class Manager implements LifecycleListener {
+
+ private final KafkaPublisher publisher;
+
+ @Inject
+ public Manager(KafkaPublisher publisher) {
+ this.publisher = publisher;
+ }
+
+ @Override
+ public void start() {
+ publisher.start();
+ }
+
+ @Override
+ public void stop() {
+ publisher.stop();
+ }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/kafka/Module.java b/src/main/java/com/googlesource/gerrit/plugins/kafka/Module.java
new file mode 100644
index 0000000..7f219d3
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/kafka/Module.java
@@ -0,0 +1,34 @@
+// 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;
+
+import com.google.gerrit.extensions.events.LifecycleListener;
+import com.google.gerrit.extensions.registration.DynamicSet;
+import com.google.gerrit.server.events.EventListener;
+import com.google.gson.Gson;
+import com.google.inject.AbstractModule;
+import com.google.inject.Singleton;
+import com.googlesource.gerrit.plugins.kafka.publish.GsonProvider;
+import com.googlesource.gerrit.plugins.kafka.publish.KafkaPublisher;
+
+class Module extends AbstractModule {
+
+ @Override
+ protected void configure() {
+ bind(Gson.class).toProvider(GsonProvider.class).in(Singleton.class);
+ DynamicSet.bind(binder(), LifecycleListener.class).to(Manager.class);
+ DynamicSet.bind(binder(), EventListener.class).to(KafkaPublisher.class);
+ }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/kafka/config/KafkaProperties.java b/src/main/java/com/googlesource/gerrit/plugins/kafka/config/KafkaProperties.java
new file mode 100644
index 0000000..c01e34e
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/kafka/config/KafkaProperties.java
@@ -0,0 +1,82 @@
+// 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.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();
+ }
+
+ 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;
+ }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/kafka/publish/GsonProvider.java b/src/main/java/com/googlesource/gerrit/plugins/kafka/publish/GsonProvider.java
new file mode 100644
index 0000000..2c5c1e7
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/kafka/publish/GsonProvider.java
@@ -0,0 +1,29 @@
+// 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.publish;
+
+import com.google.common.base.Supplier;
+import com.google.gerrit.server.events.SupplierSerializer;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.inject.Provider;
+
+public class GsonProvider implements Provider<Gson> {
+
+ @Override
+ public Gson get() {
+ return new GsonBuilder().registerTypeAdapter(Supplier.class, new SupplierSerializer()).create();
+ }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/kafka/publish/KafkaPublisher.java b/src/main/java/com/googlesource/gerrit/plugins/kafka/publish/KafkaPublisher.java
new file mode 100644
index 0000000..21b89ce
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/kafka/publish/KafkaPublisher.java
@@ -0,0 +1,52 @@
+// 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.publish;
+
+import com.google.gerrit.server.events.Event;
+import com.google.gerrit.server.events.EventListener;
+import com.google.gson.Gson;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import com.googlesource.gerrit.plugins.kafka.session.KafkaSession;
+
+@Singleton
+public class KafkaPublisher implements EventListener {
+
+ private final KafkaSession session;
+ private final Gson gson;
+
+ @Inject
+ public KafkaPublisher(KafkaSession kafkaSession, Gson gson) {
+ this.session = kafkaSession;
+ this.gson = gson;
+ }
+
+ public void start() {
+ if (!session.isOpen()) {
+ session.connect();
+ }
+ }
+
+ public void stop() {
+ session.disconnect();
+ }
+
+ @Override
+ public void onEvent(Event event) {
+ if (session.isOpen()) {
+ session.publish(gson.toJson(event));
+ }
+ }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/kafka/session/KafkaSession.java b/src/main/java/com/googlesource/gerrit/plugins/kafka/session/KafkaSession.java
new file mode 100644
index 0000000..fcb5263
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/kafka/session/KafkaSession.java
@@ -0,0 +1,75 @@
+// 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.session;
+
+import com.google.inject.Inject;
+import com.googlesource.gerrit.plugins.kafka.config.KafkaProperties;
+import org.apache.kafka.clients.producer.KafkaProducer;
+import org.apache.kafka.clients.producer.Producer;
+import org.apache.kafka.clients.producer.ProducerRecord;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public final class KafkaSession {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(KafkaSession.class);
+ private final KafkaProperties properties;
+ private volatile Producer<String, String> producer;
+
+ @Inject
+ public KafkaSession(KafkaProperties properties) {
+ this.properties = properties;
+ }
+
+ public boolean isOpen() {
+ if (producer != null) {
+ return true;
+ }
+ return false;
+ }
+
+ public void connect() {
+ if (isOpen()) {
+ LOGGER.debug("Already connected.");
+ return;
+ }
+
+ LOGGER.info("Connect to {}...", properties.getProperty("bootstrap.servers"));
+ /* Need to make sure that the thread of the running connection uses
+ * the correct class loader otherwize you can endup with hard to debug
+ * ClassNotFoundExceptions
+ */
+ setConnectionClassLoader();
+ producer = new KafkaProducer<>(properties);
+ LOGGER.info("Connection established.");
+ }
+
+ private void setConnectionClassLoader() {
+ Thread.currentThread().setContextClassLoader(KafkaSession.class.getClassLoader());
+ }
+
+ public void disconnect() {
+ LOGGER.info("Disconnecting...");
+ if (producer != null) {
+ LOGGER.info("Closing Producer {}...", producer);
+ producer.close();
+ }
+ producer = null;
+ }
+
+ public void publish(String messageBody) {
+ producer.send(new ProducerRecord<>(properties.getTopic(), "" + System.nanoTime(), messageBody));
+ }
+}
diff --git a/src/main/resources/Documentation/about.md b/src/main/resources/Documentation/about.md
new file mode 100644
index 0000000..685c195
--- /dev/null
+++ b/src/main/resources/Documentation/about.md
@@ -0,0 +1 @@
+This plugin can publish gerrit stream events to an Apache Kafka topic.
diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
new file mode 100644
index 0000000..8a354cd
--- /dev/null
+++ b/src/main/resources/Documentation/build.md
@@ -0,0 +1,31 @@
+Build
+=====
+
+This plugin is built with Bazel.
+
+Build in Gerrit tree
+--------------------
+
+Clone or link this plugin to the plugins directory of Gerrit's source
+tree, and issue the command:
+
+```
+ bazel build plugins/events-kafka
+```
+
+The output is created in
+
+```
+ bazel-genfiles/plugins/events-kafka/events-kafka.jar
+```
+
+This project can be imported into the Eclipse IDE.
+Add the plugin name to the `CUSTOM_PLUGINS` set in
+Gerrit core in `tools/bzl/plugins.bzl`, and execute:
+
+```
+ ./tools/eclipse/project.py
+```
+
+How to build the Gerrit Plugin API is described in the [Gerrit
+documentation](../../../Documentation/dev-bazel.html#_extension_and_plugin_api_jar_files).
diff --git a/src/main/resources/Documentation/config.md b/src/main/resources/Documentation/config.md
new file mode 100644
index 0000000..4db7b38
--- /dev/null
+++ b/src/main/resources/Documentation/config.md
@@ -0,0 +1,34 @@
+Apache Kafka Configuration
+======================
+
+Some parameters can be configured using Gerrit config file.
+
+Sample config
+---------------------
+
+```
+[plugin "events-kafka"]
+ bootstrapServers = localhost:9092
+```
+
+All the Apache Kafka properties configuration needs to
+be defined in gerrit.config using a lower camel-case notation.
+
+Example: bootstrapServers correspond to the Apache Kafka property
+bootstrap.servers.
+
+See [Apache Kafka Producer Config](http://kafka.apache.org/documentation.html#producerconfigs)
+for a full list of available settings and the values allowed.
+
+Default Values
+-----------------
+
+|name | value
+|:--------------------|:------------------
+| acks | all
+| retries | 0
+| batchSize | 16384
+| lingerMs | 1
+| bufferMemory | 33554432
+| keySerializer | org.apache.kafka.common.serialization.StringSerializer
+| valueSerializer | org.apache.kafka.common.serialization.StringSerializer
\ No newline at end of file
diff --git a/src/main/resources/Documentation/message.md b/src/main/resources/Documentation/message.md
new file mode 100644
index 0000000..47cae2b
--- /dev/null
+++ b/src/main/resources/Documentation/message.md
@@ -0,0 +1,15 @@
+Message Format
+======================
+
+This plugin publishes message like the below format to Apache Kafka.
+
+Key
+-----------------------
+
+Current time in nanoseconds.
+
+
+Payload
+-----------------------
+
+Payload is JSON string. (same as gerrit-events)
diff --git a/src/test/java/com/googlesource/gerrit/plugins/kafka/EventConsumerIT.java b/src/test/java/com/googlesource/gerrit/plugins/kafka/EventConsumerIT.java
new file mode 100644
index 0000000..0cafbdd
--- /dev/null
+++ b/src/test/java/com/googlesource/gerrit/plugins/kafka/EventConsumerIT.java
@@ -0,0 +1,140 @@
+// Copyright (C) 2018 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;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.common.base.Supplier;
+import com.google.common.collect.Iterables;
+import com.google.gerrit.acceptance.GerritConfig;
+import com.google.gerrit.acceptance.LightweightPluginDaemonTest;
+import com.google.gerrit.acceptance.NoHttpd;
+import com.google.gerrit.acceptance.PushOneCommit;
+import com.google.gerrit.acceptance.TestPlugin;
+import com.google.gerrit.acceptance.UseLocalDisk;
+import com.google.gerrit.extensions.api.changes.ReviewInput;
+import com.google.gerrit.extensions.common.ChangeMessageInfo;
+import com.google.gerrit.server.events.CommentAddedEvent;
+import com.google.gerrit.server.events.Event;
+import com.google.gerrit.server.events.EventDeserializer;
+import com.google.gerrit.server.events.SupplierDeserializer;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.googlesource.gerrit.plugins.kafka.config.KafkaProperties;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import org.apache.kafka.clients.consumer.Consumer;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.apache.kafka.clients.consumer.ConsumerRecords;
+import org.apache.kafka.clients.consumer.KafkaConsumer;
+import org.apache.kafka.clients.producer.ProducerConfig;
+import org.junit.Test;
+import org.testcontainers.containers.KafkaContainer;
+
+@NoHttpd
+@TestPlugin(name = "events-kafka", sysModule = "com.googlesource.gerrit.plugins.kafka.Module")
+public class EventConsumerIT extends LightweightPluginDaemonTest {
+ static final long KAFKA_POLL_TIMEOUT = 10000L;
+
+ private KafkaContainer kafka;
+
+ @Override
+ public void setUpTestPlugin() throws Exception {
+ try {
+ kafka = new KafkaContainer();
+ kafka.start();
+
+ System.setProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, kafka.getBootstrapServers());
+ } catch (IllegalStateException e) {
+ fail("Cannot start container. Is docker daemon running?");
+ }
+
+ super.setUpTestPlugin();
+ }
+
+ @Override
+ public void tearDownTestPlugin() {
+ super.tearDownTestPlugin();
+ if (kafka != null) {
+ kafka.stop();
+ }
+ }
+
+ @Test
+ @UseLocalDisk
+ @GerritConfig(name = "plugin.events-kafka.groupId", value = "test-consumer-group")
+ @GerritConfig(
+ name = "plugin.events-kafka.keyDeserializer",
+ value = "org.apache.kafka.common.serialization.StringDeserializer")
+ @GerritConfig(
+ name = "plugin.events-kafka.valueDeserializer",
+ value = "org.apache.kafka.common.serialization.StringDeserializer")
+ public void consumeEvents() throws Exception {
+ PushOneCommit.Result r = createChange();
+
+ ReviewInput in = ReviewInput.recommend();
+ in.message = "LGTM";
+ gApi.changes().id(r.getChangeId()).revision("current").review(in);
+ List<ChangeMessageInfo> messages =
+ new ArrayList<>(gApi.changes().id(r.getChangeId()).get().messages);
+ assertThat(messages).hasSize(2);
+ String expectedMessage = "Patch Set 1: Code-Review+1\n\nLGTM";
+ assertThat(messages.get(1).message).isEqualTo(expectedMessage);
+
+ List<String> events = new ArrayList<>();
+ KafkaProperties kafkaProperties = kafkaProperties();
+ try (Consumer<String, String> consumer = new KafkaConsumer<>(kafkaProperties)) {
+ consumer.subscribe(Collections.singleton(kafkaProperties.getTopic()));
+ ConsumerRecords<String, String> records = consumer.poll(KAFKA_POLL_TIMEOUT);
+ for (ConsumerRecord<String, String> record : records) {
+ events.add(record.value());
+ }
+ }
+
+ // TODO(davido): Remove special ReviewDb case when it is killed
+ // In ReviewDb case 3 events are received in the following order:
+ // 1. refUpdate: ref: refs/changes/01/1/1
+ // 2. patchset-created: ref: refs/changes/01/1/1
+ // 3. comment-added: ref: refs/heads/master
+ int numberOfEvents = 3;
+ if (notesMigration.commitChangeWrites()) {
+ // In NoteDb case the 4 events are received in the following order:
+ // 1. refUpdate: ref: refs/sequences/changes
+ // 2. refUpdate: ref: refs/changes/01/1/1
+ // 3. patchset-created: ref: refs/changes/01/1/1
+ // 4. comment-added: ref: refs/heads/master
+ numberOfEvents = 4;
+ }
+
+ assertThat(events).hasSize(numberOfEvents);
+ String commentAddedEventJson = Iterables.getLast(events);
+
+ Gson gson =
+ new GsonBuilder()
+ .registerTypeAdapter(Event.class, new EventDeserializer())
+ .registerTypeAdapter(Supplier.class, new SupplierDeserializer())
+ .create();
+ Event event = gson.fromJson(commentAddedEventJson, Event.class);
+ assertThat(event).isInstanceOf(CommentAddedEvent.class);
+
+ CommentAddedEvent commentAddedEvent = (CommentAddedEvent) event;
+ assertThat(commentAddedEvent.comment).isEqualTo(expectedMessage);
+ }
+
+ private KafkaProperties kafkaProperties() {
+ return plugin.getSysInjector().getInstance(KafkaProperties.class);
+ }
+}
