| // Copyright (C) 2019 The Android Open Source Project |
| // |
| // Licensed 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 com.googlesource.gerrit.plugins.multisite.kafka.consumer; |
| |
| import com.google.gson.Gson; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import com.googlesource.gerrit.plugins.multisite.broker.BrokerGson; |
| import com.googlesource.gerrit.plugins.multisite.consumer.SourceAwareEventWrapper; |
| import java.util.Map; |
| import org.apache.kafka.common.serialization.Deserializer; |
| import org.apache.kafka.common.serialization.StringDeserializer; |
| |
| @Singleton |
| public class KafkaEventDeserializer implements Deserializer<SourceAwareEventWrapper> { |
| |
| private final StringDeserializer stringDeserializer = new StringDeserializer(); |
| private Gson gson; |
| |
| // To be used when providing this deserializer with class name (then need to add a configuration |
| // entry to set the gson.provider |
| public KafkaEventDeserializer() {} |
| |
| @Inject |
| public KafkaEventDeserializer(@BrokerGson Gson gson) { |
| this.gson = gson; |
| } |
| |
| @Override |
| public void configure(Map<String, ?> configs, boolean isKey) {} |
| |
| @Override |
| public SourceAwareEventWrapper deserialize(String topic, byte[] data) { |
| final SourceAwareEventWrapper result = |
| gson.fromJson(stringDeserializer.deserialize(topic, data), SourceAwareEventWrapper.class); |
| |
| result.validate(); |
| |
| return result; |
| } |
| |
| @Override |
| public void close() {} |
| } |