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Posted to commits@samza.apache.org by ja...@apache.org on 2018/12/07 03:28:05 UTC
[05/18] samza-hello-samza git commit: Update Cookbook examples
http://git-wip-us.apache.org/repos/asf/samza-hello-samza/blob/f9374176/src/main/java/samza/examples/cookbook/StreamTableJoinExample.java
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diff --git a/src/main/java/samza/examples/cookbook/StreamTableJoinExample.java b/src/main/java/samza/examples/cookbook/StreamTableJoinExample.java
new file mode 100644
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+/*
+ * 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 samza.examples.cookbook;
+
+import org.apache.samza.application.StreamApplication;
+import org.apache.samza.application.StreamApplicationDescriptor;
+import org.apache.samza.operators.KV;
+import org.apache.samza.operators.MessageStream;
+import org.apache.samza.operators.OutputStream;
+import org.apache.samza.operators.functions.StreamTableJoinFunction;
+import org.apache.samza.serializers.JsonSerdeV2;
+import org.apache.samza.serializers.KVSerde;
+import org.apache.samza.serializers.Serde;
+import org.apache.samza.serializers.StringSerde;
+import org.apache.samza.storage.kv.RocksDbTableDescriptor;
+import org.apache.samza.system.kafka.KafkaInputDescriptor;
+import org.apache.samza.system.kafka.KafkaOutputDescriptor;
+import org.apache.samza.system.kafka.KafkaSystemDescriptor;
+import org.apache.samza.table.Table;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import samza.examples.cookbook.data.PageView;
+import samza.examples.cookbook.data.Profile;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * In this example, we join a stream of Page views with a table of user profiles, which is populated from an
+ * user profile stream. For instance, this is helpful for analysis that required additional information from
+ * user's profile.
+ *
+ * <p> Concepts covered: Performing stream-to-table joins.
+ *
+ * To run the below example:
+ *
+ * <ol>
+ * <li>
+ * Ensure that the topics "pageview-join-input", "profile-table-input" are created <br/>
+ * ./deploy/kafka/bin/kafka-topics.sh --zookeeper localhost:2181 --create --topic pageview-join-input --partitions 2 --replication-factor 1
+ * ./deploy/kafka/bin/kafka-topics.sh --zookeeper localhost:2181 --create --topic profile-table-input --partitions 2 --replication-factor 1
+ * </li>
+ * <li>
+ * Run the application using the run-app.sh script <br/>
+ * ./deploy/samza/bin/run-app.sh --config-factory=org.apache.samza.config.factories.PropertiesConfigFactory --config-path=file://$PWD/deploy/samza/config/stream-table-join-example.properties
+ * </li>
+ * <li>
+ * Produce some messages to the "profile-table-input" topic with the same userId <br/>
+ * ./deploy/kafka/bin/kafka-console-producer.sh --topic profile-table-input --broker-list localhost:9092 <br/>
+ * {"userId": "user1", "company": "LNKD"} <br/>
+ * {"userId": "user2", "company": "MSFT"}
+ * </li>
+ * <li>
+ * Produce some messages to the "pageview-join-input" topic <br/>
+ * ./deploy/kafka/bin/kafka-console-producer.sh --topic pageview-join-input --broker-list localhost:9092 <br/>
+ * {"userId": "user1", "country": "india", "pageId":"google.com"} <br/>
+ * {"userId": "user2", "country": "china", "pageId":"yahoo.com"}
+ * </li>
+ * <li>
+ * Consume messages from the "enriched-pageview-join-output" topic <br/>
+ * ./deploy/kafka/bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic enriched-pageview-join-output
+ * </li>
+ * </ol>
+ *
+ */
+public class StreamTableJoinExample implements StreamApplication {
+ private static final String KAFKA_SYSTEM_NAME = "kafka";
+ private static final List<String> KAFKA_CONSUMER_ZK_CONNECT = ImmutableList.of("localhost:2181");
+ private static final List<String> KAFKA_PRODUCER_BOOTSTRAP_SERVERS = ImmutableList.of("localhost:9092");
+ private static final Map<String, String> KAFKA_DEFAULT_STREAM_CONFIGS = ImmutableMap.of("replication.factor", "1");
+
+ private static final String PROFILE_STREAM_ID = "profile-table-input";
+ private static final String PAGEVIEW_STREAM_ID = "pageview-join-input";
+ private static final String OUTPUT_TOPIC = "enriched-pageview-join-output";
+
+ @Override
+ public void describe(StreamApplicationDescriptor appDescriptor) {
+ Serde<Profile> profileSerde = new JsonSerdeV2<>(Profile.class);
+ Serde<PageView> pageViewSerde = new JsonSerdeV2<>(PageView.class);
+ Serde<EnrichedPageView> joinResultSerde = new JsonSerdeV2<>(EnrichedPageView.class);
+
+ KafkaSystemDescriptor kafkaSystemDescriptor = new KafkaSystemDescriptor(KAFKA_SYSTEM_NAME)
+ .withConsumerZkConnect(KAFKA_CONSUMER_ZK_CONNECT)
+ .withProducerBootstrapServers(KAFKA_PRODUCER_BOOTSTRAP_SERVERS)
+ .withDefaultStreamConfigs(KAFKA_DEFAULT_STREAM_CONFIGS);
+
+ KafkaInputDescriptor<Profile> profileInputDescriptor =
+ kafkaSystemDescriptor.getInputDescriptor(PROFILE_STREAM_ID, profileSerde);
+ KafkaInputDescriptor<PageView> pageViewInputDescriptor =
+ kafkaSystemDescriptor.getInputDescriptor(PAGEVIEW_STREAM_ID, pageViewSerde);
+ KafkaOutputDescriptor<EnrichedPageView> joinResultOutputDescriptor =
+ kafkaSystemDescriptor.getOutputDescriptor(OUTPUT_TOPIC, joinResultSerde);
+
+ RocksDbTableDescriptor<String, Profile> profileTableDescriptor =
+ new RocksDbTableDescriptor<String, Profile>("profile-table", KVSerde.of(new StringSerde(), profileSerde));
+
+ appDescriptor.withDefaultSystem(kafkaSystemDescriptor);
+
+ MessageStream<Profile> profileStream = appDescriptor.getInputStream(profileInputDescriptor);
+ MessageStream<PageView> pageViewStream = appDescriptor.getInputStream(pageViewInputDescriptor);
+ OutputStream<EnrichedPageView> joinResultStream = appDescriptor.getOutputStream(joinResultOutputDescriptor);
+ Table<KV<String, Profile>> profileTable = appDescriptor.getTable(profileTableDescriptor);
+
+ profileStream
+ .map(profile -> KV.of(profile.userId, profile))
+ .sendTo(profileTable);
+
+ pageViewStream
+ .partitionBy(pv -> pv.userId, pv -> pv, KVSerde.of(new StringSerde(), pageViewSerde), "join")
+ .join(profileTable, new JoinFn())
+ .sendTo(joinResultStream);
+ }
+
+ private static class JoinFn implements StreamTableJoinFunction<String, KV<String, PageView>, KV<String, Profile>, EnrichedPageView> {
+ @Override
+ public EnrichedPageView apply(KV<String, PageView> message, KV<String, Profile> record) {
+ return record == null ? null :
+ new EnrichedPageView(message.getKey(), record.getValue().company, message.getValue().pageId);
+ }
+ @Override
+ public String getMessageKey(KV<String, PageView> message) {
+ return message.getKey();
+ }
+ @Override
+ public String getRecordKey(KV<String, Profile> record) {
+ return record.getKey();
+ }
+ }
+
+ static public class EnrichedPageView {
+
+ public final String userId;
+ public final String company;
+ public final String pageId;
+
+ public EnrichedPageView(String userId, String company, String pageId) {
+ this.userId = userId;
+ this.company = company;
+ this.pageId = pageId;
+ }
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/samza-hello-samza/blob/f9374176/src/main/java/samza/examples/cookbook/TumblingPageViewCounterApp.java
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diff --git a/src/main/java/samza/examples/cookbook/TumblingPageViewCounterApp.java b/src/main/java/samza/examples/cookbook/TumblingPageViewCounterApp.java
deleted file mode 100644
index 69a8e7d..0000000
--- a/src/main/java/samza/examples/cookbook/TumblingPageViewCounterApp.java
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@@ -1,120 +0,0 @@
-/*
- * 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 samza.examples.cookbook;
-
-import org.apache.samza.application.StreamApplication;
-import org.apache.samza.application.StreamApplicationDescriptor;
-import org.apache.samza.operators.KV;
-import org.apache.samza.operators.MessageStream;
-import org.apache.samza.operators.OutputStream;
-import org.apache.samza.operators.windows.Windows;
-import org.apache.samza.serializers.IntegerSerde;
-import org.apache.samza.serializers.JsonSerdeV2;
-import org.apache.samza.serializers.KVSerde;
-import org.apache.samza.serializers.StringSerde;
-import org.apache.samza.system.kafka.KafkaInputDescriptor;
-import org.apache.samza.system.kafka.KafkaOutputDescriptor;
-import org.apache.samza.system.kafka.KafkaSystemDescriptor;
-
-import com.google.common.collect.ImmutableList;
-import com.google.common.collect.ImmutableMap;
-import samza.examples.cookbook.data.PageView;
-import samza.examples.cookbook.data.UserPageViews;
-
-import java.time.Duration;
-import java.util.List;
-import java.util.Map;
-
-/**
- * In this example, we group a stream of page views by country, and compute the number of page views over a tumbling time
- * window.
- *
- * <p> Concepts covered: Performing Group-By style aggregations on tumbling time windows.
- *
- * <p> Tumbling windows divide a stream into a set of contiguous, fixed-sized, non-overlapping time intervals.
- *
- * To run the below example:
- *
- * <ol>
- * <li>
- * Ensure that the topic "pageview-tumbling-input" is created <br/>
- * ./deploy/kafka/bin/kafka-topics.sh --zookeeper localhost:2181 --create --topic pageview-tumbling-input --partitions 2 --replication-factor 1
- * </li>
- * <li>
- * Run the application using the run-app.sh script <br/>
- * ./deploy/samza/bin/run-app.sh --config-factory=org.apache.samza.config.factories.PropertiesConfigFactory --config-path=file://$PWD/deploy/samza/config/tumbling-pageview-counter.properties
- * </li>
- * <li>
- * Produce some messages to the "pageview-tumbling-input" topic, waiting for some time between messages <br/>
- ./deploy/kafka/bin/kafka-console-producer.sh --topic pageview-tumbling-input --broker-list localhost:9092 <br/>
- * {"userId": "user1", "country": "india", "pageId":"google.com/home"} <br/>
- * {"userId": "user1", "country": "india", "pageId":"google.com/search"} <br/>
- * {"userId": "user2", "country": "china", "pageId":"yahoo.com/home"} <br/>
- * {"userId": "user2", "country": "china", "pageId":"yahoo.com/sports"} <br/>
- * {"userId": "user1", "country": "india", "pageId":"google.com/news"} <br/>
- * {"userId": "user2", "country": "china", "pageId":"yahoo.com/fashion"}
- * </li>
- * <li>
- * Consume messages from the "pageview-tumbling-output" topic (e.g. bin/kafka-console-consumer.sh)
- * ./deploy/kafka/bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic pageview-tumbling-output --property print.key=true <br/>
- * </li>
- * </ol>
- *
- */
-public class TumblingPageViewCounterApp implements StreamApplication {
- private static final String KAFKA_SYSTEM_NAME = "kafka";
- private static final List<String> KAFKA_CONSUMER_ZK_CONNECT = ImmutableList.of("localhost:2181");
- private static final List<String> KAFKA_PRODUCER_BOOTSTRAP_SERVERS = ImmutableList.of("localhost:9092");
- private static final Map<String, String> KAFKA_DEFAULT_STREAM_CONFIGS = ImmutableMap.of("replication.factor", "1");
-
- private static final String INPUT_STREAM_ID = "pageview-tumbling-input";
- private static final String OUTPUT_STREAM_ID = "pageview-tumbling-output";
-
- @Override
- public void describe(StreamApplicationDescriptor appDescriptor) {
- KafkaSystemDescriptor kafkaSystemDescriptor = new KafkaSystemDescriptor(KAFKA_SYSTEM_NAME)
- .withConsumerZkConnect(KAFKA_CONSUMER_ZK_CONNECT)
- .withProducerBootstrapServers(KAFKA_PRODUCER_BOOTSTRAP_SERVERS)
- .withDefaultStreamConfigs(KAFKA_DEFAULT_STREAM_CONFIGS);
-
- KVSerde<String, PageView> pageViewSerde = KVSerde.of(new StringSerde(), new JsonSerdeV2<>(PageView.class));
- KVSerde<String, UserPageViews> userPageViewSerde = KVSerde.of(new StringSerde(), new JsonSerdeV2<>(UserPageViews.class));
-
- KafkaInputDescriptor<KV<String, PageView>> pageViewInputDescriptor =
- kafkaSystemDescriptor.getInputDescriptor(INPUT_STREAM_ID, pageViewSerde);
- KafkaOutputDescriptor<KV<String, UserPageViews>> userPageViewOutputDescriptor =
- kafkaSystemDescriptor.getOutputDescriptor(OUTPUT_STREAM_ID, userPageViewSerde);
-
- appDescriptor.withDefaultSystem(kafkaSystemDescriptor);
- MessageStream<KV<String, PageView>> pageViews = appDescriptor.getInputStream(pageViewInputDescriptor);
- OutputStream<KV<String, UserPageViews>> outputStream = appDescriptor.getOutputStream(userPageViewOutputDescriptor);
-
- pageViews
- .partitionBy(kv -> kv.value.userId, kv -> kv.value, "userId")
- .window(Windows.keyedTumblingWindow(
- kv -> kv.key, Duration.ofSeconds(5), () -> 0, (m, prevCount) -> prevCount + 1,
- new StringSerde(), new IntegerSerde()), "count")
- .map(windowPane -> {
- String userId = windowPane.getKey().getKey();
- int views = windowPane.getMessage();
- return KV.of(userId, new UserPageViews(userId, views));
- })
- .sendTo(outputStream);
- }
-}
http://git-wip-us.apache.org/repos/asf/samza-hello-samza/blob/f9374176/src/main/java/samza/examples/cookbook/TumblingWindowExample.java
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diff --git a/src/main/java/samza/examples/cookbook/TumblingWindowExample.java b/src/main/java/samza/examples/cookbook/TumblingWindowExample.java
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+++ b/src/main/java/samza/examples/cookbook/TumblingWindowExample.java
@@ -0,0 +1,121 @@
+/*
+ * 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 samza.examples.cookbook;
+
+import java.io.Serializable;
+import org.apache.samza.application.StreamApplication;
+import org.apache.samza.application.StreamApplicationDescriptor;
+import org.apache.samza.operators.KV;
+import org.apache.samza.operators.MessageStream;
+import org.apache.samza.operators.OutputStream;
+import org.apache.samza.operators.windows.Windows;
+import org.apache.samza.serializers.IntegerSerde;
+import org.apache.samza.serializers.JsonSerdeV2;
+import org.apache.samza.serializers.KVSerde;
+import org.apache.samza.serializers.StringSerde;
+import org.apache.samza.system.kafka.KafkaInputDescriptor;
+import org.apache.samza.system.kafka.KafkaOutputDescriptor;
+import org.apache.samza.system.kafka.KafkaSystemDescriptor;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import samza.examples.cookbook.data.PageView;
+import samza.examples.cookbook.data.UserPageViews;
+
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * In this example, we group a stream of page views by country, and compute the number of page views over a tumbling time
+ * window.
+ *
+ * <p> Concepts covered: Performing Group-By style aggregations on tumbling time windows.
+ *
+ * <p> Tumbling windows divide a stream into a set of contiguous, fixed-sized, non-overlapping time intervals.
+ *
+ * To run the below example:
+ *
+ * <ol>
+ * <li>
+ * Ensure that the topic "pageview-tumbling-input" is created <br/>
+ * ./deploy/kafka/bin/kafka-topics.sh --zookeeper localhost:2181 --create --topic pageview-tumbling-input --partitions 2 --replication-factor 1
+ * </li>
+ * <li>
+ * Run the application using the run-app.sh script <br/>
+ * ./deploy/samza/bin/run-app.sh --config-factory=org.apache.samza.config.factories.PropertiesConfigFactory --config-path=file://$PWD/deploy/samza/config/tumbling-window-example.properties
+ * </li>
+ * <li>
+ * Produce some messages to the "pageview-tumbling-input" topic, waiting for some time between messages <br/>
+ ./deploy/kafka/bin/kafka-console-producer.sh --topic pageview-tumbling-input --broker-list localhost:9092 <br/>
+ * {"userId": "user1", "country": "india", "pageId":"google.com/home"} <br/>
+ * {"userId": "user1", "country": "india", "pageId":"google.com/search"} <br/>
+ * {"userId": "user2", "country": "china", "pageId":"yahoo.com/home"} <br/>
+ * {"userId": "user2", "country": "china", "pageId":"yahoo.com/sports"} <br/>
+ * {"userId": "user1", "country": "india", "pageId":"google.com/news"} <br/>
+ * {"userId": "user2", "country": "china", "pageId":"yahoo.com/fashion"}
+ * </li>
+ * <li>
+ * Consume messages from the "pageview-tumbling-output" topic (e.g. bin/kafka-console-consumer.sh)
+ * ./deploy/kafka/bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic pageview-tumbling-output --property print.key=true <br/>
+ * </li>
+ * </ol>
+ *
+ */
+public class TumblingWindowExample implements StreamApplication, Serializable {
+ private static final String KAFKA_SYSTEM_NAME = "kafka";
+ private static final List<String> KAFKA_CONSUMER_ZK_CONNECT = ImmutableList.of("localhost:2181");
+ private static final List<String> KAFKA_PRODUCER_BOOTSTRAP_SERVERS = ImmutableList.of("localhost:9092");
+ private static final Map<String, String> KAFKA_DEFAULT_STREAM_CONFIGS = ImmutableMap.of("replication.factor", "1");
+
+ private static final String INPUT_STREAM_ID = "pageview-tumbling-input";
+ private static final String OUTPUT_STREAM_ID = "pageview-tumbling-output";
+
+ @Override
+ public void describe(StreamApplicationDescriptor appDescriptor) {
+ KafkaSystemDescriptor kafkaSystemDescriptor = new KafkaSystemDescriptor(KAFKA_SYSTEM_NAME)
+ .withConsumerZkConnect(KAFKA_CONSUMER_ZK_CONNECT)
+ .withProducerBootstrapServers(KAFKA_PRODUCER_BOOTSTRAP_SERVERS)
+ .withDefaultStreamConfigs(KAFKA_DEFAULT_STREAM_CONFIGS);
+
+ KVSerde<String, PageView> pageViewSerde = KVSerde.of(new StringSerde(), new JsonSerdeV2<>(PageView.class));
+ KVSerde<String, UserPageViews> userPageViewSerde = KVSerde.of(new StringSerde(), new JsonSerdeV2<>(UserPageViews.class));
+
+ KafkaInputDescriptor<KV<String, PageView>> pageViewInputDescriptor =
+ kafkaSystemDescriptor.getInputDescriptor(INPUT_STREAM_ID, pageViewSerde);
+ KafkaOutputDescriptor<KV<String, UserPageViews>> userPageViewOutputDescriptor =
+ kafkaSystemDescriptor.getOutputDescriptor(OUTPUT_STREAM_ID, userPageViewSerde);
+
+ appDescriptor.withDefaultSystem(kafkaSystemDescriptor);
+ MessageStream<KV<String, PageView>> pageViews = appDescriptor.getInputStream(pageViewInputDescriptor);
+ OutputStream<KV<String, UserPageViews>> outputStream = appDescriptor.getOutputStream(userPageViewOutputDescriptor);
+
+ pageViews
+ .partitionBy(kv -> kv.value.userId, kv -> kv.value, pageViewSerde, "userId")
+ .window(Windows.keyedTumblingWindow(
+ kv -> kv.key, Duration.ofSeconds(5), () -> 0, (m, prevCount) -> prevCount + 1,
+ new StringSerde(), new IntegerSerde()), "count")
+ .map(windowPane -> {
+ String userId = windowPane.getKey().getKey();
+ int views = windowPane.getMessage();
+ return KV.of(userId, new UserPageViews(userId, views));
+ })
+ .sendTo(outputStream);
+ }
+}