nizhikov commented on code in PR #10314: URL: https://github.com/apache/ignite/pull/10314#discussion_r1027682658
########## modules/core/src/main/java/org/apache/ignite/internal/pagemem/wal/record/ConsistentCutFinishRecord.java: ########## @@ -0,0 +1,105 @@ +/* + * 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.ignite.internal.pagemem.wal.record; + +import java.util.Collections; +import java.util.List; +import java.util.Set; +import java.util.UUID; +import java.util.stream.Collectors; +import org.apache.ignite.internal.processors.cache.consistentcut.ConsistentCut; +import org.apache.ignite.internal.processors.cache.consistentcut.ConsistentCutManager; +import org.apache.ignite.internal.processors.cache.version.GridCacheVersion; +import org.apache.ignite.lang.IgniteUuid; + +/** + * {@link ConsistentCut} splits timeline on 2 global areas - BEFORE and AFTER. It guarantees that every transaction committed + * BEFORE also will be committed BEFORE on every other node. It means that an Ignite node can safely recover itself to this + * point without any coordination with other nodes. + * <p> + * This record is written to WAL after Consistent Cut stopped analyzing transactions from {@link ConsistentCut} and + * storing them in a particular collection - {@link #before()} or {@link #after()}. + * <p> + * It guarantees that the BEFORE side consists of: + * 1. transactions physically committed before {@link ConsistentCutStartRecord} and weren't included into {@link #after()}; + * 2. transactions physically committed between {@link ConsistentCutStartRecord} and {@link ConsistentCutFinishRecord} + * and were included into {@link #before()}. + * <p> + * It guarantees that the AFTER side consists of: + * 1. transactions physically committed before {@link ConsistentCutStartRecord} and were included into {@link #after()}; + * 2. transactions physically committed between {@link ConsistentCutStartRecord} and {@link ConsistentCutFinishRecord} + * and weren't included into {@link #before()}. + * <p> + * @see ConsistentCutManager + */ +public class ConsistentCutFinishRecord extends WALRecord { + /** ID of {@link ConsistentCut}. */ + private final UUID cutId; + + /** + * Set of transactions committed between {@link ConsistentCutStartRecord} and {@link ConsistentCutFinishRecord} + * to include to the BEFORE side of Consistent Cut. + */ + private final Set<GridCacheVersion> before; + + /** + * Set of transactions committed before {@link ConsistentCutStartRecord} to include to the AFTER side of Consistent Cut. + */ + private final Set<GridCacheVersion> after; + + /** */ + public ConsistentCutFinishRecord(UUID cutId, Set<GridCacheVersion> before, Set<GridCacheVersion> after) { + this.cutId = cutId; + this.before = Collections.unmodifiableSet(before); + this.after = Collections.unmodifiableSet(after); + } + + /** */ + public Set<GridCacheVersion> before() { + return before; + } + + /** */ + public Set<GridCacheVersion> after() { + return after; + } + + /** */ + public UUID cutId() { + return cutId; + } + + /** {@inheritDoc} */ + @Override public RecordType type() { + return RecordType.CONSISTENT_CUT_FINISH_RECORD; + } + + /** {@inheritDoc} */ + @Override public String toString() { + // Dump IgniteUuid as it more convenient for debug purposes than GridCacheVersion. + List<IgniteUuid> txBefore = before.stream() Review Comment: Can you, please, provide an example? -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
