denis-chudov commented on code in PR #2115: URL: https://github.com/apache/ignite-3/pull/2115#discussion_r1211355178
########## modules/affinity/src/main/java/org/apache/ignite/internal/affinity/Assignments.java: ########## @@ -0,0 +1,228 @@ +/* + * 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.affinity; + +import static org.apache.ignite.internal.affinity.Assignment.forLearner; +import static org.apache.ignite.internal.affinity.Assignment.forPeer; + +import java.nio.ByteBuffer; +import java.nio.charset.StandardCharsets; +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashSet; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.function.Function; + +/** + * Represents affinity assignments. + */ +public class Assignments { + private final List<Set<Assignment>> assignments; + + public Assignments(List<Set<Assignment>> assignments) { + this.assignments = assignments; + } + + public List<Set<Assignment>> assignments() { + return assignments; + } + + /** + * Partitions count. + * + * @return Partitions count. + */ + public int size() { + return assignments.size(); + } + + /** + * Gets an assignments for the given partition. + * + * @param part Partition. + * @return Assignments for the given partition. + */ + public Set<Assignment> get(int part) { + return assignments.get(part); + } + + /** + * Sets an assignment for the given partition. + * + * @param part Partition. + * @param assignment Assignments for the given partition. + */ + public void set(int part, Set<Assignment> assignment) { + assignments.set(part, assignment); + } + + /** + * Bytes representation of the assignments. + * + * @return Bytes representation of the assignments. + */ + public byte[] bytes() { + Map<String, Integer> consistentIds = new LinkedHashMap<>(); + + int idx = 0; + for (Set<Assignment> assignmentSet : assignments) { + for (Assignment a : assignmentSet) { + if (consistentIds.putIfAbsent(a.consistentId(), idx) == null) { + idx++; + } + } + } + + byte[] consistentIdsBytes = collectionToBytes(consistentIds.keySet(), String::getBytes); + + byte[] assignmentsBytes = collectionToBytes( + assignments, + set -> collectionToBytes(set, a -> assignmentToBytes(a, consistentIds::get)) + ); + + ByteBuffer buf = ByteBuffer.allocate(Integer.BYTES * 2 + consistentIdsBytes.length + assignmentsBytes.length); + + buf.putInt(consistentIdsBytes.length); + buf.put(consistentIdsBytes); + buf.putInt(assignmentsBytes.length); + buf.put(assignmentsBytes); + + return buf.array(); + } + + /** + * Creates {@link Assignments} from the given byte array. + * + * @param bytes Byte array representation of the assignments. + * @return Assignments. + */ + public static Assignments fromBytes(byte[] bytes) { + ByteBuffer buf = ByteBuffer.wrap(bytes); + + int consistentIdsBytesLength = buf.getInt(); + byte[] consistentIdsBytes = new byte[consistentIdsBytesLength]; + buf.get(consistentIdsBytes); + + int assignmentsBytesLength = buf.getInt(); + byte[] assignmentsBytes = new byte[assignmentsBytesLength]; + buf.get(assignmentsBytes); + + List<String> consistentIds = bytesToList(consistentIdsBytes, b -> new String(b, StandardCharsets.UTF_8)); + + List<Set<Assignment>> assignments = bytesToList( + assignmentsBytes, + b -> new HashSet<>(bytesToList(b, ab -> bytesToAssignment(ab, consistentIds::get))) + ); + + return new Assignments(assignments); + } + + /** + * Serializes collection to bytes. + * + * @param collection Collection. + * @param transform Tranform function for the collection element. + * @return Byte array. + */ + private <T> byte[] collectionToBytes(Collection<T> collection, Function<T, byte[]> transform) { + int bytesObjects = 0; + List<byte[]> objects = new ArrayList<>(); + + for (T o : collection) { + byte[] b = transform.apply(o); + objects.add(b); + bytesObjects += b.length; + } + + bytesObjects += Short.BYTES * (objects.size() + 1); + + ByteBuffer buf = ByteBuffer.allocate(bytesObjects); + + buf.putShort((short) objects.size()); Review Comment: agree -- 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: notifications-unsubscr...@ignite.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
