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Signed-off-by: Angelica Ochoa <[email protected]>
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70 changes: 70 additions & 0 deletions
70
service/src/main/java/org/mskcc/smile/service/util/NatsMsgUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| package org.mskcc.smile.service.util; | ||
|
|
||
| import com.fasterxml.jackson.core.JsonProcessingException; | ||
| import com.fasterxml.jackson.core.type.TypeReference; | ||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import com.fasterxml.jackson.databind.exc.MismatchedInputException; | ||
| import io.nats.client.Message; | ||
| import java.nio.charset.StandardCharsets; | ||
| import org.apache.commons.logging.Log; | ||
| import org.apache.commons.logging.LogFactory; | ||
|
|
||
| /** | ||
| * | ||
| * @author ochoaa | ||
| */ | ||
| public class NatsMsgUtil { | ||
| private static final ObjectMapper mapper = new ObjectMapper(); | ||
| private static final Log LOG = LogFactory.getLog(NatsMsgUtil.class); | ||
|
|
||
| /** | ||
| * Extracts string from NATS message data contents. | ||
| * @param msg | ||
| * @return String | ||
| * @throws JsonProcessingException | ||
| */ | ||
| public static String extractNatsJsonString(Message msg) | ||
| throws JsonProcessingException { | ||
| byte[] msgData = msg.getData(); | ||
| try { | ||
| String jsonString = mapper.readValue( | ||
| new String(msgData, StandardCharsets.UTF_8), | ||
| String.class); | ||
| return jsonString; | ||
| } catch (MismatchedInputException e) { | ||
| LOG.warn("Failed to deserialize with mapper.readValue() - " | ||
| + "attempting mapper.convertValue()"); | ||
| } | ||
|
|
||
| try { | ||
| String jsonString = mapper.convertValue( | ||
| new String(msgData, StandardCharsets.UTF_8), | ||
| String.class); | ||
| return jsonString; | ||
| } catch (Exception e) { | ||
| LOG.warn("Failed to deserialize with mapper.convertValue(). " | ||
| + "Cannot deserialize message"); | ||
| e.printStackTrace(); | ||
| } | ||
|
|
||
| LOG.error("Could not deserialize message from contents: " + msg.toString()); | ||
| LOG.error(msg); | ||
| return null; | ||
| } | ||
|
|
||
| /** | ||
| * Converts string to given TypeReference. | ||
| * @param input | ||
| * @param valueTypeReference | ||
| * @return Object | ||
| * @throws JsonProcessingException | ||
| */ | ||
| public static Object convertObjectFromString(String input, TypeReference valueTypeReference) | ||
| throws JsonProcessingException { | ||
| try { | ||
| return mapper.convertValue(input, valueTypeReference); | ||
| } catch (IllegalArgumentException e) { | ||
| return mapper.readValue(input, valueTypeReference); | ||
| } | ||
| } | ||
| } |