mxm commented on code in PR #741: URL: https://github.com/apache/flink-kubernetes-operator/pull/741#discussion_r1448978630
########## flink-autoscaler-plugin-jdbc/src/main/java/org/apache/flink/autoscaler/jdbc/state/JobStateView.java: ########## @@ -0,0 +1,262 @@ +/* + * 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.flink.autoscaler.jdbc.state; + +import org.apache.flink.annotation.VisibleForTesting; + +import javax.annotation.Nonnull; +import javax.annotation.concurrent.NotThreadSafe; + +import java.util.Collections; +import java.util.HashMap; +import java.util.LinkedList; +import java.util.List; +import java.util.Map; +import java.util.function.Function; + +import static org.apache.flink.autoscaler.jdbc.state.JobStateView.State.NEEDS_CREATE; +import static org.apache.flink.autoscaler.jdbc.state.JobStateView.State.NEEDS_DELETE; +import static org.apache.flink.autoscaler.jdbc.state.JobStateView.State.NEEDS_UPDATE; +import static org.apache.flink.autoscaler.jdbc.state.JobStateView.State.NOT_NEEDED; +import static org.apache.flink.autoscaler.jdbc.state.JobStateView.State.UP_TO_DATE; +import static org.apache.flink.util.Preconditions.checkState; + +/** The view of job state. */ +@NotThreadSafe +public class JobStateView { + + /** + * The state of state type about the cache and database. + * + * <p>Note: {@link #inLocally} and {@link #inDatabase} are only for understand, we don't use + * them. + */ + @SuppressWarnings("unused") + enum State { + + /** State doesn't exist at database, and it's not used so far, so it's not needed. */ + NOT_NEEDED(false, false, false), + /** State is only stored locally, not created in JDBC database yet. */ + NEEDS_CREATE(true, false, true), + /** State exists in JDBC database but there are newer local changes. */ + NEEDS_UPDATE(true, true, true), + /** State is stored locally and in database, and they are same. */ + UP_TO_DATE(true, true, false), + /** State is stored in database, but it's deleted in local. */ + NEEDS_DELETE(false, true, true); Review Comment: Got it. The code complexity for adding a new state backend makes we wonder though, if we need to rethink some of the building blocks for state stores. It would be good to move more of the logic into the core, to avoid duplicating / writing similar logic. I was initially more in favor of moving this out of the core but we need to see if that might be too complicated in the long run. This is out of scope for this PR though. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
