| /* |
| * 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.streaming.connectors.gcp.pubsub; |
| |
| import org.apache.flink.api.common.serialization.SimpleStringSchema; |
| |
| /** |
| * For testing PubSub we need to have messages that can indicate the end of the stream to cleanly |
| * terminate the test run. |
| * |
| * <p>IMPORTANT NOTE: This way of testing uses an effect of the PubSub emulator that is absolutely |
| * guaranteed NOT to work in the real PubSub: The ordering of the messages is maintained in the |
| * topic. So here we can assume that if we add a stop message LAST we can terminate the test stream |
| * when we see it. |
| */ |
| public class SimpleStringSchemaWithStopMarkerDetection extends SimpleStringSchema { |
| public static final String STOP_MARKER = "<><><>STOP STOP STOP<><><>"; |
| |
| @Override |
| public boolean isEndOfStream(String s) { |
| return (STOP_MARKER.equals(s)); |
| } |
| } |
