Add check for if performance_metadata is enabled before adding metadata for grok processing time to Events

Signed-off-by: Taylor Gray <tylgry@amazon.com>

Author: graytaylor0

data-prepper-plugins/grok-processor/src/main/java/org/opensearch/dataprepper/plugins/processor/grok/GrokProcessor.java

@@ -149,13 +149,15 @@ public Collection<Record<Event>> doExecute(final Collection<Record<Event>> recor
 
             final Instant endTime = Instant.now();
 
-            Long totalEventTimeInGrok = (Long) event.getMetadata().getAttribute(TOTAL_TIME_SPENT_IN_GROK_METADATA_KEY);
-            if (totalEventTimeInGrok == null) {
-                totalEventTimeInGrok = 0L;
-            }
+            if (grokProcessorConfig.getIncludePerformanceMetadata()) {
+                Long totalEventTimeInGrok = (Long) event.getMetadata().getAttribute(TOTAL_TIME_SPENT_IN_GROK_METADATA_KEY);
+                if (totalEventTimeInGrok == null) {
+                    totalEventTimeInGrok = 0L;
+                }
 
-            final long timeSpentInThisGrok = endTime.toEpochMilli() - startTime.toEpochMilli();
-            event.getMetadata().setAttribute(TOTAL_TIME_SPENT_IN_GROK_METADATA_KEY, totalEventTimeInGrok + timeSpentInThisGrok);
+                final long timeSpentInThisGrok = endTime.toEpochMilli() - startTime.toEpochMilli();
+                event.getMetadata().setAttribute(TOTAL_TIME_SPENT_IN_GROK_METADATA_KEY, totalEventTimeInGrok + timeSpentInThisGrok);
+            }
          }
         return records;
     }

data-prepper-plugins/grok-processor/src/test/java/org/opensearch/dataprepper/plugins/processor/grok/GrokProcessorTests.java

@@ -190,6 +190,7 @@ public void testMatchMerge() throws JsonProcessingException, ExecutionException,
         assertThat(grokkedRecords.get(0).getData(), notNullValue());
         assertThat(grokkedRecords.get(0).getData().getMetadata(), notNullValue());
         assertThat(grokkedRecords.get(0).getData().getMetadata().getAttribute(TOTAL_PATTERNS_ATTEMPTED_METADATA_KEY), equalTo(null));
+        assertThat(grokkedRecords.get(0).getData().getMetadata().getAttribute(TOTAL_TIME_SPENT_IN_GROK_METADATA_KEY), equalTo(null));
         assertRecordsAreEqual(grokkedRecords.get(0), resultRecord);
 
         verify(grokProcessingMatchCounter, times(1)).increment();