[GitHub] [rocketmq-schema-registry] humkum commented on a diff in pull request #41: support JSON serde

[GitBox <gi...@apache.org>]

humkum commented on code in PR #41:
URL: https://github.com/apache/rocketmq-schema-registry/pull/41#discussion_r951191055


##########
client/src/main/java/org/apache/rocketmq/schema/registry/client/serde/json/JsonSerializer.java:
##########
@@ -0,0 +1,83 @@
+/*
+ * 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.rocketmq.schema.registry.client.serde.json;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.apache.avro.io.EncoderFactory;
+import org.apache.rocketmq.schema.registry.client.SchemaRegistryClient;
+import org.apache.rocketmq.schema.registry.client.exceptions.RestClientException;
+import org.apache.rocketmq.schema.registry.client.exceptions.SerializationException;
+import org.apache.rocketmq.schema.registry.client.rest.JacksonMapper;
+import org.apache.rocketmq.schema.registry.client.serde.Serializer;
+import org.apache.rocketmq.schema.registry.common.constant.SchemaConstants;
+import org.apache.rocketmq.schema.registry.common.dto.GetSchemaResponse;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.Map;
+
+public class JsonSerializer<T> implements Serializer<T> {
+    private final SchemaRegistryClient registryClient;
+    private final ObjectMapper objectMapper;
+    private final EncoderFactory encoderFactory = EncoderFactory.get();
+
+    public JsonSerializer(SchemaRegistryClient registryClient) {
+        this.objectMapper = JacksonMapper.INSTANCE;
+        this.registryClient = registryClient;
+    }
+
+    @Override
+    public void configure(Map<String, Object> configs) {
+
+    }
+
+    @Override
+    public byte[] serialize(String subject, T originMessage) {
+        if (null == originMessage) {
+            return null;
+        }
+
+        if (null == registryClient) {
+            throw new SerializationException("please initialize the schema registry client first");
+        }
+
+        try {
+            GetSchemaResponse response = registryClient.getSchemaBySubject(subject);
+            long schemaRecordId = response.getRecordId();
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteBuffer buffer = ByteBuffer.allocate(SchemaConstants.SCHEMA_RECORD_ID_LENGTH);
+            out.write(buffer.putLong(schemaRecordId).array());
+            out.write(objectMapper.writeValueAsBytes(originMessage));
+
+            byte[] bytes = out.toByteArray();
+            out.close();

Review Comment:
   I have fix this, please check this again.



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