| /* |
| * 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.cep.operator; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.api.common.functions.AbstractRichFunction; |
| import org.apache.flink.api.common.functions.RichFunction; |
| import org.apache.flink.api.common.functions.util.FunctionUtils; |
| import org.apache.flink.api.common.typeutils.TypeSerializer; |
| import org.apache.flink.api.java.tuple.Tuple2; |
| import org.apache.flink.cep.EventComparator; |
| import org.apache.flink.cep.PatternSelectFunction; |
| import org.apache.flink.cep.PatternTimeoutFunction; |
| import org.apache.flink.cep.nfa.AfterMatchSkipStrategy; |
| import org.apache.flink.cep.nfa.compiler.NFACompiler; |
| import org.apache.flink.configuration.Configuration; |
| import org.apache.flink.streaming.runtime.streamrecord.StreamRecord; |
| import org.apache.flink.util.OutputTag; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * Version of {@link AbstractKeyedCEPPatternOperator} that applies given {@link PatternSelectFunction} to fully |
| * matched event patterns and {@link PatternTimeoutFunction} to timed out ones. The timed out elements are returned |
| * as a side-output. |
| * |
| * @param <IN> Type of the input elements |
| * @param <KEY> Type of the key on which the input stream is keyed |
| * @param <OUT1> Type of the output elements |
| * @param <OUT2> Type of the timed out output elements |
| */ |
| public class SelectTimeoutCepOperator<IN, OUT1, OUT2, KEY> |
| extends AbstractKeyedCEPPatternOperator<IN, KEY, OUT1, SelectTimeoutCepOperator.SelectWrapper<IN, OUT1, OUT2>> { |
| |
| private OutputTag<OUT2> timedOutOutputTag; |
| |
| public SelectTimeoutCepOperator( |
| TypeSerializer<IN> inputSerializer, |
| boolean isProcessingTime, |
| NFACompiler.NFAFactory<IN> nfaFactory, |
| final EventComparator<IN> comparator, |
| AfterMatchSkipStrategy skipStrategy, |
| PatternSelectFunction<IN, OUT1> selectFunction, |
| PatternTimeoutFunction<IN, OUT2> timeoutFunction, |
| OutputTag<OUT2> outputTag, |
| OutputTag<IN> lateDataOutputTag) { |
| super( |
| inputSerializer, |
| isProcessingTime, |
| nfaFactory, |
| comparator, |
| skipStrategy, |
| new SelectWrapper<>(selectFunction, timeoutFunction), |
| lateDataOutputTag); |
| this.timedOutOutputTag = outputTag; |
| } |
| |
| @Override |
| protected void processMatchedSequences(Iterable<Map<String, List<IN>>> matchingSequences, long timestamp) throws Exception { |
| for (Map<String, List<IN>> match : matchingSequences) { |
| output.collect(new StreamRecord<>(getUserFunction().getSelectFunction().select(match), timestamp)); |
| } |
| } |
| |
| @Override |
| protected void processTimedOutSequences( |
| Iterable<Tuple2<Map<String, List<IN>>, Long>> timedOutSequences, long timestamp) throws Exception { |
| for (Tuple2<Map<String, List<IN>>, Long> match : timedOutSequences) { |
| output.collect(timedOutOutputTag, |
| new StreamRecord<>( |
| getUserFunction().getTimeoutFunction().timeout(match.f0, match.f1), |
| timestamp)); |
| } |
| } |
| |
| @Override |
| public void endInput() throws Exception { |
| |
| } |
| |
| /** |
| * Wrapper that enables storing {@link PatternSelectFunction} and {@link PatternTimeoutFunction} in one udf. |
| * |
| * @param <IN> Type of the input elements |
| * @param <OUT1> Type of the output elements |
| * @param <OUT2> Type of the timed out output elements |
| */ |
| @Internal |
| public static class SelectWrapper<IN, OUT1, OUT2> extends AbstractRichFunction { |
| |
| private static final long serialVersionUID = -8320546120157150202L; |
| |
| private PatternSelectFunction<IN, OUT1> selectFunction; |
| private PatternTimeoutFunction<IN, OUT2> timeoutFunction; |
| |
| PatternSelectFunction<IN, OUT1> getSelectFunction() { |
| return selectFunction; |
| } |
| |
| PatternTimeoutFunction<IN, OUT2> getTimeoutFunction() { |
| return timeoutFunction; |
| } |
| |
| public SelectWrapper( |
| PatternSelectFunction<IN, OUT1> selectFunction, |
| PatternTimeoutFunction<IN, OUT2> timeoutFunction) { |
| this.selectFunction = selectFunction; |
| this.timeoutFunction = timeoutFunction; |
| } |
| |
| @Override |
| public void open(Configuration parameters) throws Exception { |
| FunctionUtils.setFunctionRuntimeContext(selectFunction, getRuntimeContext()); |
| FunctionUtils.setFunctionRuntimeContext(timeoutFunction, getRuntimeContext()); |
| FunctionUtils.openFunction(selectFunction, parameters); |
| FunctionUtils.openFunction(timeoutFunction, parameters); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| if (selectFunction instanceof RichFunction) { |
| ((RichFunction) selectFunction).close(); |
| } |
| if (timeoutFunction instanceof RichFunction) { |
| ((RichFunction) timeoutFunction).close(); |
| } |
| } |
| } |
| } |