| /* |
| * 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.iotdb.db.pipe.pattern; |
| |
| import org.apache.iotdb.db.pipe.event.realtime.PipeRealtimeEvent; |
| import org.apache.iotdb.db.pipe.extractor.dataregion.realtime.PipeRealtimeDataRegionExtractor; |
| |
| import java.util.Set; |
| |
| public interface PipeDataRegionMatcher { |
| |
| /** |
| * Register a extractor. If the extractor's pattern matches the event's schema info, the event |
| * will be assigned to the extractor. |
| */ |
| void register(PipeRealtimeDataRegionExtractor extractor); |
| |
| /** Deregister a extractor. */ |
| void deregister(PipeRealtimeDataRegionExtractor extractor); |
| |
| /** Get the number of registered extractors in this matcher. */ |
| int getRegisterCount(); |
| |
| /** |
| * Match the event's schema info with the registered extractors' patterns. If the event's schema |
| * info matches the pattern of a extractor, the extractor will be returned. |
| * |
| * @param event the event to be matched |
| * @return the matched extractors |
| */ |
| Set<PipeRealtimeDataRegionExtractor> match(PipeRealtimeEvent event); |
| |
| /** Clear all the registered extractors and internal data structures. */ |
| void clear(); |
| } |