/* * 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.statefun.flink.state.processor.operator; import org.apache.flink.api.common.functions.RuntimeContext; import org.apache.flink.core.fs.Path; import org.apache.flink.runtime.state.KeyedStateBackend; import org.apache.flink.runtime.state.StateInitializationContext; import org.apache.flink.state.api.output.SnapshotUtils; import org.apache.flink.state.api.output.TaggedOperatorSubtaskState; import org.apache.flink.statefun.flink.core.functions.FunctionGroupOperator; import org.apache.flink.statefun.flink.core.message.MessageFactoryType; import org.apache.flink.statefun.flink.core.state.FlinkState; import org.apache.flink.statefun.flink.core.state.State; import org.apache.flink.statefun.flink.core.types.DynamicallyRegisteredTypes; import org.apache.flink.statefun.flink.core.types.StaticallyRegisteredTypes; import org.apache.flink.statefun.flink.state.processor.union.TaggedBootstrapData; import org.apache.flink.streaming.api.operators.AbstractStreamOperator; import org.apache.flink.streaming.api.operators.BoundedOneInput; import org.apache.flink.streaming.api.operators.OneInputStreamOperator; import org.apache.flink.streaming.runtime.streamrecord.StreamRecord; /** An operator used to bootstrap function state for the {@link FunctionGroupOperator}. */ public final class FunctionsStateBootstrapOperator extends AbstractStreamOperator<TaggedOperatorSubtaskState> implements OneInputStreamOperator<TaggedBootstrapData, TaggedOperatorSubtaskState>, BoundedOneInput { private static final long serialVersionUID = 1L; private final StateBootstrapFunctionRegistry stateBootstrapFunctionRegistry; private final long snapshotTimestamp; private final Path snapshotPath; private transient StateBootstrapper stateBootstrapper; public FunctionsStateBootstrapOperator( StateBootstrapFunctionRegistry stateBootstrapFunctionRegistry, long snapshotTimestamp, Path snapshotPath) { this.stateBootstrapFunctionRegistry = stateBootstrapFunctionRegistry; this.snapshotTimestamp = snapshotTimestamp; this.snapshotPath = snapshotPath; } @Override public void initializeState(StateInitializationContext context) throws Exception { super.initializeState(context); final State stateAccessor = createStateAccessor(getRuntimeContext(), getKeyedStateBackend()); this.stateBootstrapper = new StateBootstrapper(stateBootstrapFunctionRegistry, stateAccessor); } @Override public void processElement(StreamRecord<TaggedBootstrapData> streamRecord) throws Exception { stateBootstrapper.apply(streamRecord.getValue()); } @Override public void endInput() throws Exception { // bootstrap dataset is now completely processed; // take a snapshot of the function states final TaggedOperatorSubtaskState state = SnapshotUtils.snapshot( this, getRuntimeContext().getIndexOfThisSubtask(), snapshotTimestamp, getContainingTask().getCheckpointStorage(), snapshotPath); output.collect(new StreamRecord<>(state)); } private static State createStateAccessor( RuntimeContext runtimeContext, KeyedStateBackend<Object> keyedStateBackend) { return new FlinkState( runtimeContext, keyedStateBackend, new DynamicallyRegisteredTypes( new StaticallyRegisteredTypes(MessageFactoryType.WITH_RAW_PAYLOADS))); } }