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Implement custom bedrock json parser for v1 & v2 #25
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public JsonParser(String json) { | ||
this.json = json.trim(); | ||
this.position = 0; | ||
} |
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I think we should avoid to create new JsonParser
instances with JsonString text from constructor. Can we update public Map<String, Object> parse()
to static
and have it take the JsongString text as input so we can call JsonParser.parse(json)
directly in the caller method?
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ok. I found JsonParser needs to maintain position
state in each instance for each data processing. is it necessary?
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As we discussed, suggest changing JsonParser
to something like JSONObject
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The JsonParser needs to maintain some kind of position
state since we are parsing the string character by character.
However, this state does not need to be exposed as public. I think we can hide this state from the user by making it private instead.
BedrockJsonParser.JsonParser parser = new BedrockJsonParser.JsonParser(jsonString); | ||
Map<String, Object> jsonBody = parser.parse(); |
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BedrockJsonParser.JsonObject jsonObject = new BedrockJsonParser.JsonObject(jsonString);
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Will implement something similar with this:
// Parse the LLM JSON string into a Map
LlmJson llmJson = BedrockJsonParser.parse(jsonString);
return null; | ||
} | ||
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private static Object resolvePath(Map<String, Object> json, String path) { |
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Suggest changing ot the custom JsonObject
as input instead of generic Map
which will restrict to pass in the correct/expect data while calling this method
return result.toString(); | ||
} | ||
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private Object readValue() { |
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I found an open-source mini-json parser without requiring Dep, which has very similar Impl like yours which is good. :) Could double check test a few things? Will you impl be able to handle the attribute value
with special chars such as \n?
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Could you add the unit tests for the json utils? We test against different bedrock response format pattern and edge cases
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Added unit tests to cover special chars and unicode that may appear in the input/output prompts. Also added some test cases to cover empty objects and arrays.
try { | ||
JsonNode jsonBody; | ||
// Extract JSON string from target if it is a Bedrock Runtime JSON blob | ||
String jsonString; | ||
if (target instanceof SdkBytes) { | ||
String jsonString = ((SdkBytes) target).asUtf8String(); | ||
jsonBody = objectMapper.readTree(jsonString); | ||
jsonString = ((SdkBytes) target).asUtf8String(); | ||
} else { | ||
if (target != null) { | ||
return target.toString(); | ||
} | ||
return null; | ||
} | ||
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// Parse the LLM JSON string into a Map | ||
LlmJson llmJson = BedrockJsonParser.parse(jsonString); | ||
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// Use attribute name to extract the corresponding value | ||
switch (attributeName) { | ||
case "gen_ai.request.max_tokens": | ||
return getMaxTokens(jsonBody); | ||
return llmJson.getMaxTokens(); | ||
case "gen_ai.request.temperature": | ||
return getTemperature(jsonBody); | ||
return llmJson.getTemperature(); | ||
case "gen_ai.request.top_p": | ||
return getTopP(jsonBody); | ||
return llmJson.getTopP(); | ||
case "gen_ai.response.finish_reasons": | ||
return getFinishReasons(jsonBody); | ||
return llmJson.getFinishReasons(); | ||
case "gen_ai.usage.input_tokens": | ||
return getInputTokens(jsonBody); | ||
return llmJson.getInputTokens(); | ||
case "gen_ai.usage.output_tokens": | ||
return getOutputTokens(jsonBody); | ||
return llmJson.getOutputTokens(); | ||
default: | ||
return null; | ||
} | ||
} catch (JsonProcessingException e) { | ||
} catch (RuntimeException e) { | ||
return null; | ||
} |
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This logic should swallow all Exceptions raised by the custom parser so that we do not propagate it to the application level
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LGTM!
Closing this PR since #27 was merged to our new |
Description of changes:
Implement custom bedrock json parser for our Java v1 & v2 SDK auto-instrumentation using only native language features to avoid introducing external dependencies.
TODO:
Address PR comments from @mxiamxiaPending further review.Implementation parity between v2 and v1Done.Add unit tests for custom parserTentatively done. May need to add more test casesUpdate behavior to not add attribute when value is null. Currently it assigns"null"
as attribute value.Add support for new Amazon Nova Models.Done for both v1 & v2.Implement custom parser for Java v1.Updated this PR with v1 changes.Investigate why only Mistral contract test case is failing.There is minor rounding difference when using custom parser. Had to update the assertion forgen_ai.usage.input_tokens
from15
to16
.Test plan:
Added unit tests for various edge cases.
Ran the existing contract tests in our ADOT package and verified the test cases for all 6 models are passing.
Amazon Nova
Amazon Titan
Anthropic Claude
AI21 Jamba
Mistral
Meta Llama
Cohere Command R