log.body.parameters as stringArray

Author: igor-suhorukov

instrumentation/logback/logback-appender-1.0/library/src/main/java/io/opentelemetry/instrumentation/logback/appender/v1_0/internal/LoggingEventMapper.java

@@ -24,9 +24,11 @@
 import java.io.PrintWriter;
 import java.io.StringWriter;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
 import org.slf4j.Marker;
 import org.slf4j.event.KeyValuePair;
 
@@ -202,10 +204,9 @@ void captureMdcAttributes(AttributesBuilder attributes, Map<String, String> mdcP
   void captureArguments(AttributesBuilder attributes, String message, Object[] arguments) {
     String bodyKey = "log.body.template";
     attributes.put(bodyKey, message);
-    for (int idx = 0; idx < arguments.length; idx++) {
-      Object argument = arguments[idx];
-      propagateAttribute(attributes, String.format("log.body.parameters.%d", idx), argument);
-    }
+    attributes.put(
+        AttributeKey.stringArrayKey("log.body.parameters"),
+        Arrays.stream(arguments).map(String::valueOf).collect(Collectors.toList()));
   }
 
   public static AttributeKey<String> getMdcAttributeKey(String key) {

instrumentation/logback/logback-appender-1.0/library/src/slf4j2ApiTest/java/io/opentelemetry/instrumentation/logback/appender/v1_0/Slf4j2Test.java

@@ -133,13 +133,20 @@ void arguments() {
     assertThat(logData.getBody().asString())
         .isEqualTo(
             "log message 'world' and 3.141592653589793, bool true, long 9223372036854775807");
-    assertThat(logData.getAttributes().size()).isEqualTo(9);
+    assertThat(logData.getAttributes().size()).isEqualTo(6);
+    assertThat(logData.getAttributes())
+        .hasEntrySatisfying(
+            AttributeKey.stringArrayKey("log.body.parameters"),
+            value ->
+                assertThat(value)
+                    .isEqualTo(
+                        Arrays.asList(
+                            "'world'",
+                            String.valueOf(Math.PI),
+                            String.valueOf(true),
+                            String.valueOf(Long.MAX_VALUE))));
     assertThat(logData)
         .hasAttributesSatisfying(
-            equalTo(AttributeKey.stringKey("log.body.parameters.0"), "'world'"),
-            equalTo(AttributeKey.doubleKey("log.body.parameters.1"), Math.PI),
-            equalTo(AttributeKey.booleanKey("log.body.parameters.2"), true),
-            equalTo(AttributeKey.longKey("log.body.parameters.3"), Long.MAX_VALUE),
             equalTo(
                 AttributeKey.stringKey("log.body.template"),
                 "log message {} and {}, bool {}, long {}"));