/* * 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 com.king.bravo.writer.functions; import org.apache.flink.api.common.functions.MapFunction; import org.apache.flink.api.common.typeutils.TypeSerializer; import org.apache.flink.api.java.tuple.Tuple2; import org.apache.flink.core.memory.ByteArrayOutputStreamWithPos; import org.apache.flink.core.memory.DataOutputViewStreamWrapper; import org.apache.flink.runtime.state.KeyGroupRangeAssignment; import org.apache.flink.runtime.state.VoidNamespace; import org.apache.flink.runtime.state.VoidNamespaceSerializer; import org.apache.flink.util.InstantiationUtil; import com.king.bravo.types.KeyedStateRow; import com.king.bravo.utils.RocksDBUtils; import com.king.bravo.utils.StateMetadataUtils; public class ValueStateToKeyedStateRow<K, V> implements MapFunction<Tuple2<K, V>, KeyedStateRow> { private static final long serialVersionUID = 1L; private final int maxParallelism; private final TypeSerializer<K> keySerializer; private final TypeSerializer<V> valueSerializer; private final int keygroupPrefixBytes; private final String stateName; public ValueStateToKeyedStateRow(String stateName, TypeSerializer<K> keySerializer, TypeSerializer<V> valueSerializer, int maxParallelism) { this.stateName = stateName; this.maxParallelism = maxParallelism; keygroupPrefixBytes = StateMetadataUtils.getKeyGroupPrefixBytes(maxParallelism); this.keySerializer = keySerializer; this.valueSerializer = valueSerializer; } @Override public KeyedStateRow map(Tuple2<K, V> t) throws Exception { int keyGroup = KeyGroupRangeAssignment.assignToKeyGroup(t.f0, maxParallelism); ByteArrayOutputStreamWithPos os = new ByteArrayOutputStreamWithPos(); DataOutputViewStreamWrapper ov = new DataOutputViewStreamWrapper(os); RocksDBUtils.writeKeyGroup(keyGroup, keygroupPrefixBytes, ov); RocksDBUtils.writeKey(t.f0, keySerializer, os, ov, false); RocksDBUtils.writeNameSpace(VoidNamespace.INSTANCE, VoidNamespaceSerializer.INSTANCE, os, ov, false); os.close(); return new KeyedStateRow(stateName, os.toByteArray(), InstantiationUtil.serializeToByteArray(valueSerializer, t.f1)); } }