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package io.mcarle.sciurus.monitor; |
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import io.mcarle.sciurus.annotation.LoggingMonitorParams; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import java.lang.reflect.Method; |
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import java.time.Duration; |
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import java.time.temporal.ChronoUnit; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.List; |
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import java.util.function.BiConsumer; |
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import java.util.stream.Stream; |
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public enum LoggingMonitor implements CustomMonitor { |
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INSTANCE; |
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private final static Logger LOG = LoggerFactory.getLogger(LoggingMonitor.class); |
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private final static String BASE_LOG_TEMPLATE = "({} {}) - {}#{}"; |
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private final static String LOG_TEMPLATE_PARAMS = "({})"; |
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private final static String LOG_TEMPLATE_RESULT = " : {}"; |
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private static BiConsumer<String, Object[]> getLogger(final LoggingMonitorParams monitorParams, final Duration duration) { |
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if (monitorParams.warnLimit() > 0) { |
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if (Duration.of(monitorParams.warnLimit(), monitorParams.warnLimitUnit()).compareTo(duration) < 0) { |
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return LOG::warn; |
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} |
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} |
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return LOG::debug; |
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} |
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@SuppressWarnings("rawtypes") |
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private static Object extractMethodResult( |
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final Throwable throwable, |
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final Class returnType, |
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final Object returnValue |
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) { |
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return throwable != null |
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? throwable.toString() |
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: (returnType == Void.TYPE ? "void" : returnValue); |
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} |
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private static String extractLogTemplate(final LoggingMonitorParams monitorParams) { |
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String result = BASE_LOG_TEMPLATE; |
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if (monitorParams.logParameter()) { |
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result += LOG_TEMPLATE_PARAMS; |
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} |
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if (monitorParams.logResult()) { |
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result += LOG_TEMPLATE_RESULT; |
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} |
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return result; |
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} |
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private static Object[] extractLogParams( |
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final LoggingMonitorParams monitorParams, |
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final Duration duration, |
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final String className, |
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final String methodName, |
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final Object[] methodArgs, |
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final Object methodResult |
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) { |
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ChronoUnit outputUnit = smallestUnitWithValueMaximal(duration); |
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List<Object> result = new ArrayList<>( |
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Arrays.asList( |
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String.format("%4s", getDurationIn(duration, outputUnit)), |
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abbreviationOfChronoUnit(outputUnit), |
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className, |
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methodName |
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) |
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); |
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if (monitorParams.logParameter()) { |
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result.add(methodArgs); |
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} |
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if (monitorParams.logResult()) { |
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result.add(methodResult); |
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} |
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return result.toArray(); |
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} |
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private static String abbreviationOfChronoUnit(ChronoUnit unit) { |
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if (unit.equals(ChronoUnit.SECONDS)) { |
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return "s "; |
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} else if (unit.equals(ChronoUnit.MILLIS)) { |
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return "ms"; |
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} else if (unit.equals(ChronoUnit.MICROS)) { |
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return "µs"; |
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} else { |
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return "ns"; |
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} |
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} |
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private static ChronoUnit smallestUnitWithValueMaximal(Duration duration) { |
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return Stream.of(ChronoUnit.NANOS, ChronoUnit.MICROS, ChronoUnit.MILLIS, ChronoUnit.SECONDS) |
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.filter(unit -> getDurationIn(duration, unit) < 9999) |
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.findFirst() |
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.orElse(ChronoUnit.SECONDS); |
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} |
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private static long getDurationIn(Duration duration, ChronoUnit unit) { |
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if (unit == ChronoUnit.MICROS) { |
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return (duration.toNanos() + 500) / 1_000; |
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} else if (unit == ChronoUnit.MILLIS) { |
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return (duration.toNanos() + 500_000) / 1_000_000; |
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} else if (unit == ChronoUnit.SECONDS) { |
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return (duration.toNanos() + 500_000_000) / 1_000_000_000; |
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} else { |
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return duration.toNanos(); |
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} |
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} |
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@SuppressWarnings("rawtypes") |
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@Override |
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public void monitored( |
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Duration duration, |
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String declaringTypeName, |
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Method method, |
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Object[] methodArgs, |
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Throwable throwable, |
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Class returnType, |
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Object returnValue |
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) { |
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LoggingMonitorParams loggingParams = getLoggingMonitorParams(method); |
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getLogger(loggingParams, duration) |
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.accept( |
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extractLogTemplate(loggingParams), |
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extractLogParams( |
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loggingParams, |
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duration, |
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declaringTypeName, |
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method.getName(), |
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methodArgs, |
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extractMethodResult(throwable, returnType, returnValue) |
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) |
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); |
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} |
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private LoggingMonitorParams getLoggingMonitorParams(Method method) { |
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LoggingMonitorParams params = method.getAnnotation(LoggingMonitorParams.class); |
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if (params == null) { |
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params = method.getDeclaringClass().getAnnotation(LoggingMonitorParams.class); |
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if (params == null) { |
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params = LoggingMonitorParamsAnnotationClass.class.getAnnotation(LoggingMonitorParams.class); |
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} |
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} |
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return params; |
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} |
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@LoggingMonitorParams |
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static class LoggingMonitorParamsAnnotationClass { |
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} |
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} |
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mcarleio /
sciurus
