Package com.fayupable.logged.spring.metrics

Class MicrometerMetricsRecorder

java.lang.Object

com.fayupable.logged.spring.metrics.MicrometerMetricsRecorder

All Implemented Interfaces:

MetricsRecorder

public class MicrometerMetricsRecorder
extends Object
implements MetricsRecorder

MetricsRecorder implementation backed by Micrometer.

Every invocation is recorded against three meters:

• method.invocations: a counter tagged with class, method, and outcome (success or error), tracking how many times a method was called.
• method.duration: a timer tagged with class and method, tracking how long calls took, with a percentile histogram published for latency dashboards.
• method.errors: a counter tagged with class, method, and exception, registered only when an invocation fails, tracking which exceptions occur and how often.

All tags are bounded to a small, fixed set of low-cardinality values derived from the invoked method itself. Method arguments and return values are never used as tags, since they could otherwise produce an unbounded number of time series and degrade the metrics backend.

Meters are looked up once per distinct tag combination and cached afterward. MeterRegistry's own register call is not prohibitively expensive, but it still allocates a Meter.Id and performs a map lookup on every call; caching avoids repeating that work on every single invocation of a hot @Logged method.

Constructor Summary

Constructors

Constructor	Description
MicrometerMetricsRecorder(io.micrometer.core.instrument.MeterRegistry meterRegistry)

Method Summary

Modifier and Type	Method	Description
void	record(String className, String methodName, long durationNanos, boolean success, String exceptionType)	Records the given invocation against the invocation counter, the duration timer, and, if the call failed, the error counter.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MicrometerMetricsRecorder

public MicrometerMetricsRecorder(io.micrometer.core.instrument.MeterRegistry meterRegistry)

Method Details

record

public void record(String className,
 String methodName,
 long durationNanos,
 boolean success,
 String exceptionType)

Records the given invocation against the invocation counter, the duration timer, and, if the call failed, the error counter.

Specified by:

record in interface MetricsRecorder

Parameters:

className - the simple or fully qualified name of the class declaring the invoked method

methodName - the name of the invoked method

durationNanos - the wall-clock duration of the invocation, in nanoseconds

success - true if the method returned normally, false if it threw an exception

exceptionType - the simple class name of the exception thrown by the method, or null if the call succeeded