58 lines
1.9 KiB
Java
58 lines
1.9 KiB
Java
/*
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* Copyright 2022 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package example;
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import java.util.Locale;
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import java.util.Map;
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import java.util.function.Function;
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import example.entity.KafkaEntity;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.cloud.function.json.JsonMapper;
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import org.springframework.context.annotation.Bean;
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import org.springframework.messaging.Message;
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@SpringBootApplication
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public class KafkaTriggerDemoApplication {
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public static void main(String[] args) {
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SpringApplication.run(KafkaTriggerDemoApplication.class, args);
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}
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@Bean
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public Function<Message<String>, String> uppercase(JsonMapper mapper) {
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return message -> {
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// Convert the message payload into Azure's KafkaEntity format.
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KafkaEntity kafkaEntity = mapper.fromJson(message.getPayload(), KafkaEntity.class);
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// Business logic: convert the JSON string values into uppercase.
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if (kafkaEntity.getValue() != null) {
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Map<String, Object> valueMap = mapper.fromJson(kafkaEntity.getValue(), Map.class);
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if (valueMap != null) {
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valueMap.forEach((k, v) -> valueMap.put(k,
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v != null && v instanceof String ? ((String) v).toUpperCase(Locale.ROOT) : null));
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return mapper.toString(valueMap);
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}
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}
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return mapper.toString(null);
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};
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}
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}
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