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new 8d88b20 KAFKA-10199: Add interface for state updater (#11499)
8d88b20 is described below
commit 8d88b20b2779faa413ffc4c6d2546800e225213f
Author: Bruno Cadonna <cado...@apache.org>
AuthorDate: Wed Feb 23 19:13:08 2022 +0100
KAFKA-10199: Add interface for state updater (#11499)
Reviewers: Andrew Eugene Choi <andrew.c...@uwaterloo.ca>, Guozhang Wang
<wangg...@gmail.com>
---
.../streams/processor/internals/StateUpdater.java | 69 ++++++++++++++++++++++
1 file changed, 69 insertions(+)
diff --git
a/streams/src/main/java/org/apache/kafka/streams/processor/internals/StateUpdater.java
b/streams/src/main/java/org/apache/kafka/streams/processor/internals/StateUpdater.java
new file mode 100644
index 0000000..8965abf
--- /dev/null
+++
b/streams/src/main/java/org/apache/kafka/streams/processor/internals/StateUpdater.java
@@ -0,0 +1,69 @@
+/*
+ * 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 java.time.Duration;
+import java.util.List;
+import java.util.Set;
+
+public interface StateUpdater {
+
+ /**
+ * Adds a task (active or standby) to the state updater.
+ *
+ * @param task task to add
+ */
+ void add(final Task task);
+
+ /**
+ * Removes a task (active or standby) from the state updater.
+ *
+ * @param task task ro remove
+ */
+ void remove(final Task task);
+
+ /**
+ * Gets restored active tasks from state restoration/update
+ *
+ * @param timeout duration how long the calling thread should wait for
restored active tasks
+ *
+ * @return list of active tasks with up-to-date states
+ */
+ Set<StreamTask> getRestoredActiveTasks(final Duration timeout);
+
+ /**
+ * Gets a list of exceptions thrown during restoration.
+ *
+ * @return exceptions
+ */
+ List<RuntimeException> getExceptions();
+
+
+ /**
+ * Get all tasks (active and standby) that are managed by the state
updater.
+ *
+ * @return list of tasks managed by the state updater
+ */
+ Set<Task> getAllTasks();
+
+ /**
+ * Shuts down the state updater.
+ *
+ * @param timeout duration how long to wait until the state updater is
shut down
+ */
+ void shutdown(final Duration timeout);
+}
