Introducing Performance Loggers

src/main/java/com/microsoft/sqlserver/jdbc/PerformanceActivity.java

@@ -0,0 +1,23 @@
+package com.microsoft.sqlserver.jdbc;
+
+public enum PerformanceActivity {
+    CONNECTION("Connection"),
+    TOKEN_ACQUISITION("Token acquisition"),
+    LOGIN("Login"),
+    PRELOGIN("Prelogin");
+
+    private final String activity;
+
+    PerformanceActivity(String activity) {
+        this.activity = activity;
+    }
+
+    public String activity() {
+        return activity;
+    }
+
+    @Override
+    public String toString() {
+        return activity;
+    }
+}

src/main/java/com/microsoft/sqlserver/jdbc/PerformanceLog.java

@@ -0,0 +1,45 @@
+package com.microsoft.sqlserver.jdbc;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class PerformanceLog {
+
+    static final java.util.logging.Logger perfLoggerConnection = java.util.logging.Logger
+            .getLogger("com.microsoft.sqlserver.jdbc.PerformanceMetrics.Connection");
+
+    //TODO
+    //More loggers to be added here e.g. com.microsoft.sqlserver.jdbc.PerformanceMetrics.Statement
+
+    public static class Scope implements AutoCloseable {
+        private Logger logger;
+        private String logPrefix;
+        private PerformanceActivity activity;
+        private long startTime;
+        private final boolean enabled;
+
+        public Scope(Logger logger, String logPrefix, PerformanceActivity activity) {
+            this.enabled = logger.isLoggable(Level.INFO);
+            if (enabled) {
+                this.logger = logger;
+                this.logPrefix = logPrefix;
+                this.activity = activity;
+                this.startTime = enabled ? System.currentTimeMillis() : 0;
+                logger.info(String.format("%d %s %s start", startTime, logPrefix, activity));
+            }
+        }
+
+        @Override
+        public void close() {
+            if (enabled) {
+                long endTime = System.currentTimeMillis();
+                long duration = endTime - startTime;
+                logger.info(String.format("%d %s %s end, duration: %dms", endTime, logPrefix, activity, duration));
+            }
+        }
+    }
+
+    public static Scope createScope(Logger logger, String logPrefix, PerformanceActivity activity) {
+        return new Scope(logger, logPrefix, activity);
+    }
+}