| /* |
| * 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, |
| true, |
| false, |
| 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))); |
| } |
| } |