com.aliyun.datahub.model.serialize.GetBlobRecordsRequestJsonSer Maven / Gradle / Ivy
package com.aliyun.datahub.model.serialize;
import com.aliyun.datahub.common.transport.DefaultRequest;
import com.aliyun.datahub.common.transport.HttpMethod;
import com.aliyun.datahub.exception.DatahubClientException;
import com.aliyun.datahub.exception.InvalidParameterException;
import com.aliyun.datahub.model.GetBlobRecordsRequest;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import java.io.IOException;
public class GetBlobRecordsRequestJsonSer implements Serializer {
@Override
public DefaultRequest serialize(GetBlobRecordsRequest request) throws DatahubClientException {
DefaultRequest req = new DefaultRequest();
req.setResource("/projects/" + request.getProjectName() + "/topics/"
+ request.getTopicName() + "/shards/" + request.getShardId());
req.setHttpMethod(HttpMethod.POST);
ObjectMapper mapper = new ObjectMapper();
ObjectNode body = mapper.createObjectNode();
body.put("Action", "sub");
body.put("Cursor", request.getCursor());
if (request.getLimit() <= 0) {
throw new InvalidParameterException("record size must be positive");
}
body.put("Limit", request.getLimit());
try {
req.setBody(mapper.writeValueAsString(body));
} catch (IOException e) {
throw new DatahubClientException("serialize error", e);
}
return req;
}
private GetBlobRecordsRequestJsonSer() {
}
private static GetBlobRecordsRequestJsonSer instance;
public static GetBlobRecordsRequestJsonSer getInstance() {
if (instance == null)
instance = new GetBlobRecordsRequestJsonSer();
return instance;
}
}
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