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From GitBox <...@apache.org>
Subject [GitHub] [kafka] mjsax commented on a change in pull request #9835: MINOR: Add 'task container' class to KafkaStreams TaskManager
Date Wed, 06 Jan 2021 18:19:27 GMT

mjsax commented on a change in pull request #9835:
URL: https://github.com/apache/kafka/pull/9835#discussion_r552882809

File path: streams/src/main/java/org/apache/kafka/streams/processor/internals/Tasks.java
@@ -0,0 +1,295 @@
+ * 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.kafka.streams.processor.internals;
+import org.apache.kafka.clients.consumer.Consumer;
+import org.apache.kafka.common.Metric;
+import org.apache.kafka.common.MetricName;
+import org.apache.kafka.common.TopicPartition;
+import org.apache.kafka.common.utils.LogContext;
+import org.apache.kafka.streams.processor.TaskId;
+import org.apache.kafka.streams.processor.internals.metrics.StreamsMetricsImpl;
+import org.slf4j.Logger;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+import java.util.stream.Collectors;
+class Tasks {
+    private final Logger log;
+    private final InternalTopologyBuilder builder;
+    private final StreamsMetricsImpl streamsMetrics;
+    private final Map<TaskId, Task> allTasksPerId = new TreeMap<>();

Review comment:
       We replace the old `Map<TaskId, Task>` with redundant data structures and read-only
views. This will allow us to improve type safety later. To keep this PR small, I did not implement
the changes to get actual type safety yet.

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