Merge pull request #1170 from quarkiverse/observability-npes

Be more defensive in setting metadata for observability events

Author: geoand

core/runtime/src/main/java/io/quarkiverse/langchain4j/runtime/listeners/MetricsChatModelListener.java

@@ -16,7 +16,6 @@
 import io.micrometer.core.instrument.Counter;
 import io.micrometer.core.instrument.Meter;
 import io.micrometer.core.instrument.Metrics;
-import io.micrometer.core.instrument.Tag;
 import io.micrometer.core.instrument.Tags;
 import io.micrometer.core.instrument.Timer;
 import io.quarkiverse.langchain4j.cost.Cost;
@@ -78,9 +77,10 @@ public void onResponse(ChatModelResponseContext responseContext) {
 
         ChatModelRequest request = responseContext.request();
         ChatModelResponse response = responseContext.response();
-        Tags tags = Tags.of(
-                Tag.of("gen_ai.request.model", request.model()),
-                Tag.of("gen_ai.response.model", response.model()));
+        Tags tags = Tags.of("gen_ai.request.model", request.model());
+        if (response.model() != null) {
+            tags = tags.and("gen_ai.response.model", response.model());
+        }
         if (ContextLocals.duplicatedContextActive()) {
             String aiServiceClassName = ContextLocals.get(AiServiceConstants.AI_SERVICE_CLASS_NAME);
             if (aiServiceClassName != null) {
@@ -112,10 +112,13 @@ public void onError(ChatModelErrorContext errorContext) {
             return;
         }
 
-        Tags tags = Tags.of(
-                Tag.of("gen_ai.request.model", errorContext.request().model()),
-                Tag.of("gen_ai.response.model", errorContext.partialResponse().model()),
-                Tag.of("error.type", aiMessage.text()));
+        Tags tags = Tags.of("gen_ai.request.model", errorContext.request().model());
+        if (errorContext.partialResponse().model() != null) {
+            tags = tags.and("gen_ai.response.model", errorContext.partialResponse().model());
+        }
+        if (aiMessage.text() != null) {
+            tags = tags.and("error.type", aiMessage.text());
+        }
         duration.withTags(tags).record(endTime - startTime, TimeUnit.NANOSECONDS);
     }
 

core/runtime/src/main/java/io/quarkiverse/langchain4j/runtime/listeners/SpanChatModelListener.java

@@ -61,7 +61,10 @@ public void onResponse(ChatModelResponseContext responseContext) {
         Span span = (Span) attributes.get(OTEL_SPAN_KEY_NAME);
         if (span != null) {
             ChatModelResponse response = responseContext.response();
-            span.setAttribute("gen_ai.response.id", response.id()).setAttribute("gen_ai.response.model", response.model());
+            span.setAttribute("gen_ai.response.id", response.id());
+            if (response.model() != null) {
+                span.setAttribute("gen_ai.response.model", response.model());
+            }
             if (response.finishReason() != null) {
                 span.setAttribute("gen_ai.response.finish_reasons", response.finishReason().toString());
             }