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https://issues.apache.org/jira/browse/GOBBLIN-758?focusedWorklogId=236925&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-236925
]
ASF GitHub Bot logged work on GOBBLIN-758:
------------------------------------------
Author: ASF GitHub Bot
Created on: 03/May/19 16:39
Start Date: 03/May/19 16:39
Worklog Time Spent: 10m
Work Description: zxcware commented on pull request #2622: [GOBBLIN-758]
Added new reporters to emit MetricReport and GobblinTrackingEvent without
serializing them. Also added random key generator for reporters.
URL: https://github.com/apache/incubator-gobblin/pull/2622#discussion_r280842949
##########
File path:
gobblin-modules/gobblin-kafka-common/src/main/java/org/apache/gobblin/metrics/kafka/KeyValueEventObjectReporter.java
##########
@@ -0,0 +1,173 @@
+/*
+ * 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.gobblin.metrics.kafka;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Queue;
+import java.util.Random;
+
+import org.apache.avro.generic.GenericRecord;
+import org.apache.commons.lang3.tuple.Pair;
+
+import com.google.common.base.Optional;
+import com.google.common.base.Splitter;
+import com.google.common.collect.Lists;
+import com.typesafe.config.Config;
+
+import lombok.extern.slf4j.Slf4j;
+
+import org.apache.gobblin.configuration.ConfigurationKeys;
+import org.apache.gobblin.metrics.GobblinTrackingEvent;
+import org.apache.gobblin.metrics.MetricContext;
+import org.apache.gobblin.metrics.reporter.EventReporter;
+import org.apache.gobblin.util.AvroUtils;
+import org.apache.gobblin.util.ConfigUtils;
+
+
+@Slf4j
+public class KeyValueEventObjectReporter extends EventReporter {
+ private static final String PUSHER_CONFIG = "pusherConfig";
+ private static final String PUSHER_CLASS = "pusherClass";
+ private static final String PUSHER_KEYS = "pusherKeys";
+
+ protected Optional<List<String>> keys = Optional.absent();
+ protected final String randomKey;
+ protected KeyValuePusher pusher;
+ protected Optional<Map<String, String>> namespaceOverride;
+ protected final String topic;
+
+ public KeyValueEventObjectReporter(Builder<?> builder) {
+ super(builder);
+
+ this.topic = builder.topic;
+ this.namespaceOverride = builder.namespaceOverride;
+
+ Config config = builder.config.get();
+ Config pusherConfig = ConfigUtils.getConfigOrEmpty(config,
PUSHER_CONFIG).withFallback(config);
+ String pusherClassName =
+ ConfigUtils.getString(config, PUSHER_CLASS,
PusherUtils.DEFAULT_KEY_VALUE_PUSHER_CLASS_NAME);
+ this.pusher =
+ PusherUtils.getKeyValuePusher(pusherClassName, builder.brokers,
builder.topic, Optional.of(pusherConfig));
+ this.closer.register(this.pusher);
+
+ randomKey = String.valueOf(new Random().nextInt(100));
+ if (config.hasPath(PUSHER_KEYS)) {
+ List<String> keys =
Splitter.on(",").omitEmptyStrings().trimResults().splitToList(config.getString(PUSHER_KEYS));
+ this.keys = Optional.of(keys);
+ } else {
+ log.warn("Key not assigned from config. Please set it with property {}",
+ ConfigurationKeys.METRICS_REPORTING_EVENTS_KAFKAPUSHERKEYS);
+ log.warn("Using generated number " + randomKey + " as key");
+ }
+ }
+
+ @Override
+ public void reportEventQueue(Queue<GobblinTrackingEvent> queue) {
+ log.info("Emitting report using KeyValueEventObjectReporter");
+
+ List<Pair<String, GenericRecord>> events = Lists.newArrayList();
+ GobblinTrackingEvent event;
+
+ while (null != (event = queue.poll())) {
+ GenericRecord record = AvroUtils.overrideNameAndNamespace(event,
this.topic, this.namespaceOverride);
+ events.add(Pair.of(buildKey(event), record));
+ }
+
+ if (!events.isEmpty()) {
+ this.pusher.pushKeyValueMessages(events);
+ }
+ }
+
+ private String buildKey(GobblinTrackingEvent event) {
+
+ String key = randomKey;
+ if (this.keys.isPresent()) {
+ StringBuilder keyBuilder = new StringBuilder();
+ for (String keyPart : keys.get()) {
+ Optional value = AvroUtils.getFieldValue(event, keyPart);
+ if (value.isPresent()) {
+ keyBuilder.append(value.get().toString());
Review comment:
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Issue Time Tracking
-------------------
Worklog Id: (was: 236925)
Time Spent: 10m
Remaining Estimate: 0h
> Use keys to push messages to kafka. Implemented Metric and Event reporters
> that push messages without serialization.
> --------------------------------------------------------------------------------------------------------------------
>
> Key: GOBBLIN-758
> URL: https://issues.apache.org/jira/browse/GOBBLIN-758
> Project: Apache Gobblin
> Issue Type: Improvement
> Reporter: Vikram Bohra
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> This ticket introduces the following changes.
> 1) It reduces the number of connections to Kafka by using a randomly
> generated key for each instance of the reporter.
> 2) Introduces a KeyValuePusher interface that provides a cleaner way to push
> key value messages to kafka.
> 3) Default implementation of the above interface for kafka.
> 4) New Reporters for reporting GobblinTrackingEvent and MetricReport without
> serializing them.
>
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