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Fixes NPE in #78

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This commit is contained in:
Markus Klenke 2024-12-04 22:54:54 +01:00
parent 726fea5b74
commit ff3344616c
1 changed files with 21 additions and 3 deletions
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20
src/main/java/io/github/ollama4j/models/request/OllamaChatEndpointCaller.java
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@ -1,7 +1,9 @@
package io.github.ollama4j.models.request;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import io.github.ollama4j.exceptions.OllamaBaseException;
import io.github.ollama4j.models.chat.OllamaChatMessage;
import io.github.ollama4j.models.response.OllamaResult;
import io.github.ollama4j.models.chat.OllamaChatResponseModel;
import io.github.ollama4j.models.chat.OllamaChatStreamObserver;
@ -31,14 +33,30 @@ public class OllamaChatEndpointCaller extends OllamaEndpointCaller {
return "/api/chat";
}
/**
* Parses streamed Response line from ollama chat.
* Using {@link com.fasterxml.jackson.databind.ObjectMapper#readValue(String, TypeReference)} should throw
* {@link IllegalArgumentException} in case of null line or {@link com.fasterxml.jackson.core.JsonParseException}
* in case the JSON Object cannot be parsed to a {@link OllamaChatResponseModel}. Thus, the ResponseModel should
* never be null.
*
* @param line streamed line of ollama stream response
* @param responseBuffer Stringbuffer to add latest response message part to
* @return TRUE, if ollama-Response has 'done' state
*/
@Override
protected boolean parseResponseAndAddToBuffer(String line, StringBuilder responseBuffer) {
try {
OllamaChatResponseModel ollamaResponseModel = Utils.getObjectMapper().readValue(line, OllamaChatResponseModel.class);
responseBuffer.append(ollamaResponseModel.getMessage().getContent());
// it seems that under heavy load ollama responds with an empty chat message part in the streamed response
// thus, we null check the message and hope that the next streamed response has some message content again
OllamaChatMessage message = ollamaResponseModel.getMessage();
if(message != null) {
responseBuffer.append(message.getContent());
if (streamObserver != null) {
streamObserver.notify(ollamaResponseModel);
}
}
return ollamaResponseModel.isDone();
} catch (JsonProcessingException e) {
LOG.error("Error parsing the Ollama chat response!", e);