/* * 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.state.api.output.operators; import org.apache.flink.annotation.Internal; import org.apache.flink.core.fs.Path; import org.apache.flink.state.api.functions.StateBootstrapFunction; import org.apache.flink.state.api.output.SnapshotUtils; import org.apache.flink.state.api.output.TaggedOperatorSubtaskState; import org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator; import org.apache.flink.streaming.api.operators.BoundedOneInput; import org.apache.flink.streaming.api.operators.OneInputStreamOperator; import org.apache.flink.streaming.runtime.streamrecord.StreamRecord; import org.apache.flink.streaming.runtime.tasks.ProcessingTimeService; /** * A {@link org.apache.flink.streaming.api.operators.StreamOperator} for executing {@link * StateBootstrapFunction}'s. */ @Internal public class StateBootstrapOperator<IN> extends AbstractUdfStreamOperator<TaggedOperatorSubtaskState, StateBootstrapFunction<IN>> implements OneInputStreamOperator<IN, TaggedOperatorSubtaskState>, BoundedOneInput { private static final long serialVersionUID = 1L; private final long timestamp; private final Path savepointPath; private transient ContextImpl context; public StateBootstrapOperator(long timestamp, Path savepointPath, StateBootstrapFunction<IN> function) { super(function); this.timestamp = timestamp; this.savepointPath = savepointPath; } @Override public void open() throws Exception { super.open(); context = new ContextImpl(getProcessingTimeService()); } @Override public void processElement(StreamRecord<IN> element) throws Exception { userFunction.processElement(element.getValue(), context); } @Override public void endInput() throws Exception { TaggedOperatorSubtaskState state = SnapshotUtils.snapshot( this, getRuntimeContext().getIndexOfThisSubtask(), timestamp, getContainingTask().getCheckpointStorage(), savepointPath); output.collect(new StreamRecord<>(state)); } private class ContextImpl implements StateBootstrapFunction.Context { private final ProcessingTimeService processingTimeService; ContextImpl(ProcessingTimeService processingTimeService) { this.processingTimeService = processingTimeService; } @Override public long currentProcessingTime() { return processingTimeService.getCurrentProcessingTime(); } } }