rpuch commented on code in PR #814: URL: https://github.com/apache/ignite-3/pull/814#discussion_r881605007
########## modules/storage-page-memory/src/main/java/org/apache/ignite/internal/storage/pagememory/mv/TransactionIds.java: ########## @@ -0,0 +1,57 @@ +/* + * 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.storage.pagememory.mv; + +import static org.apache.ignite.internal.pagememory.util.PageUtils.putLong; + +import java.util.UUID; +import org.jetbrains.annotations.Nullable; + +/** + * Utils to work with Transaction IDs. + */ +public class TransactionIds { + /** + * Writes transaction ID to memory starting at the specified address. + * + * @param addr addreds where to start writing + * @param offset offset to add to the address + * @param txId transaction ID to write + * @return number of bytes written + */ + public static int writeTransactionId(long addr, int offset, @Nullable UUID txId) { + long txIdHigh; + long txIdLow; + if (txId != null) { + txIdHigh = txId.getMostSignificantBits(); + txIdLow = txId.getLeastSignificantBits(); + } else { + txIdHigh = VersionChain.NULL_UUID_COMPONENT; + txIdLow = VersionChain.NULL_UUID_COMPONENT; + } + + putLong(addr, offset, txIdHigh); + putLong(addr, offset + Long.BYTES, txIdLow); + + return 2 * Long.BYTES; + } + + private TransactionIds() { Review Comment: To avoid instantiation -- 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]
