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src.bak/main/java/com/example/util/PerformanceTimer.java

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+/*
+ * Copyright 2025 Google. This software is provided as-is, without warranty or representation for any use or purpose.
+ * Your use of it is subject to your agreement with Google.
+ */
+package com.example.util;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.function.Supplier;
+
+/**
+ * A utility class to measure and log the execution time of a given operation.
+ * It uses the Supplier functional interface to wrap the code block to be timed.
+ */
+public class PerformanceTimer {
+    private static final Logger logger = LoggerFactory.getLogger(PerformanceTimer.class);
+
+
+    public static <T> T timeExecution(String operationName, Supplier<T> operation) {
+        long startTime = System.nanoTime();
+        try {
+            T result = operation.get();
+            long endTime = System.nanoTime();
+            long durationNanos = endTime - startTime;
+            double durationMillis = durationNanos / 1_000_000.0;
+            logger.info("Operation '{}' completed in {} ms.", operationName, String.format("%.2f", durationMillis));
+            return result;
+        } catch (Exception e) {
+            long endTime = System.nanoTime();
+            long durationNanos = endTime - startTime;
+            double durationMillis = durationNanos / 1_000_000.0;
+            logger.error("Operation '{}' failed in {} ms: {}", operationName, String.format("%.2f", durationMillis), e.getMessage(), e);
+            throw new RuntimeException("Error during timed operation: " + operationName, e);
+        }
+    }
+}