Categories:
Audio (13)
Biotech (29)
Bytecode (36)
Database (77)
Framework (7)
Game (7)
General (507)
Graphics (53)
I/O (35)
IDE (2)
JAR Tools (101)
JavaBeans (21)
JDBC (121)
JDK (426)
JSP (20)
Logging (108)
Mail (58)
Messaging (8)
Network (84)
PDF (97)
Report (7)
Scripting (84)
Security (32)
Server (121)
Servlet (26)
SOAP (24)
Testing (54)
Web (15)
XML (309)
Collections:
Other Resources:
JDK 17 jdk.jfr.jmod - JFR Module
JDK 17 jdk.jfr.jmod is the JMOD file for JDK 17 JFR module.
JDK 17 JFR module compiled class files are stored in \fyicenter\jdk-17.0.5\jmods\jdk.jfr.jmod.
JDK 17 JFR module compiled class files are also linked and stored in the \fyicenter\jdk-17.0.5\lib\modules JImage file.
JDK 17 JFR module source code files are stored in \fyicenter\jdk-17.0.5\lib\src.zip\jdk.jfr.
You can click and view the content of each source code file in the list below.
✍: FYIcenter
⏎ jdk/jfr/internal/Utils.java
/* * Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package jdk.jfr.internal; import static java.util.concurrent.TimeUnit.MICROSECONDS; import static java.util.concurrent.TimeUnit.MILLISECONDS; import static java.util.concurrent.TimeUnit.NANOSECONDS; import static java.util.concurrent.TimeUnit.SECONDS; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; import java.io.RandomAccessFile; import java.lang.annotation.Annotation; import java.lang.annotation.Repeatable; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.nio.file.Path; import java.time.Duration; import java.time.Instant; import java.time.LocalDateTime; import java.time.temporal.ChronoUnit; import java.util.ArrayList; import java.util.Arrays; import java.util.concurrent.TimeUnit; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Objects; import jdk.internal.org.objectweb.asm.ClassReader; import jdk.internal.org.objectweb.asm.util.CheckClassAdapter; import jdk.internal.platform.Metrics; import jdk.jfr.Event; import jdk.jfr.FlightRecorderPermission; import jdk.jfr.Recording; import jdk.jfr.RecordingState; import jdk.jfr.internal.handlers.EventHandler; import jdk.jfr.internal.settings.PeriodSetting; import jdk.jfr.internal.settings.StackTraceSetting; import jdk.jfr.internal.settings.ThresholdSetting; public final class Utils { private static final Object flushObject = new Object(); private static final String INFINITY = "infinity"; private static final String OFF = "off"; public static final String EVENTS_PACKAGE_NAME = "jdk.jfr.events"; public static final String INSTRUMENT_PACKAGE_NAME = "jdk.jfr.internal.instrument"; public static final String HANDLERS_PACKAGE_NAME = "jdk.jfr.internal.handlers"; public static final String REGISTER_EVENT = "registerEvent"; public static final String ACCESS_FLIGHT_RECORDER = "accessFlightRecorder"; private static final String LEGACY_EVENT_NAME_PREFIX = "com.oracle.jdk."; private static Boolean SAVE_GENERATED; private static final Duration MICRO_SECOND = Duration.ofNanos(1_000); private static final Duration SECOND = Duration.ofSeconds(1); private static final Duration MINUTE = Duration.ofMinutes(1); private static final Duration HOUR = Duration.ofHours(1); private static final Duration DAY = Duration.ofDays(1); private static final int NANO_SIGNIFICANT_FIGURES = 9; private static final int MILL_SIGNIFICANT_FIGURES = 3; private static final int DISPLAY_NANO_DIGIT = 3; private static final int BASE = 10; private static long THROTTLE_OFF = -2; /* * This field will be lazily initialized and the access is not synchronized. * The possible data race is benign and is worth of not introducing any contention here. */ private static Metrics[] metrics; public static void checkAccessFlightRecorder() throws SecurityException { @SuppressWarnings("removal") SecurityManager sm = System.getSecurityManager(); if (sm != null) { sm.checkPermission(new FlightRecorderPermission(ACCESS_FLIGHT_RECORDER)); } } public static void checkRegisterPermission() throws SecurityException { @SuppressWarnings("removal") SecurityManager sm = System.getSecurityManager(); if (sm != null) { sm.checkPermission(new FlightRecorderPermission(REGISTER_EVENT)); } } private static enum TimespanUnit { NANOSECONDS("ns", 1000), MICROSECONDS("us", 1000), MILLISECONDS("ms", 1000), SECONDS("s", 60), MINUTES("m", 60), HOURS("h", 24), DAYS("d", 7); final String text; final long amount; TimespanUnit(String unit, long amount) { this.text = unit; this.amount = amount; } } // Tjis method can't handle Long.MIN_VALUE because absolute value is negative private static String formatDataAmount(String formatter, long amount) { int exp = (int) (Math.log(Math.abs(amount)) / Math.log(1024)); char unitPrefix = "kMGTPE".charAt(exp - 1); return String.format(formatter, amount / Math.pow(1024, exp), unitPrefix); } public static String formatBytesCompact(long bytes) { if (bytes < 1024) { return String.valueOf(bytes); } return formatDataAmount("%.1f%cB", bytes); } public static String formatBits(long bits) { if (bits == 1 || bits == -1) { return bits + " bit"; } if (bits < 1024 && bits > -1024) { return bits + " bits"; } return formatDataAmount("%.1f %cbit", bits); } public static String formatBytes(long bytes) { if (bytes == 1 || bytes == -1) { return bytes + " byte"; } if (bytes < 1024 && bytes > -1024) { return bytes + " bytes"; } return formatDataAmount("%.1f %cB", bytes); } public static String formatBytesPerSecond(long bytes) { if (bytes < 1024 && bytes > -1024) { return bytes + " byte/s"; } return formatDataAmount("%.1f %cB/s", bytes); } public static String formatBitsPerSecond(long bits) { if (bits < 1024 && bits > -1024) { return bits + " bps"; } return formatDataAmount("%.1f %cbps", bits); } public static String formatTimespan(Duration dValue, String separation) { if (dValue == null) { return "0"; } long value = dValue.toNanos(); TimespanUnit result = TimespanUnit.NANOSECONDS; for (TimespanUnit unit : TimespanUnit.values()) { result = unit; long amount = unit.amount; if (result == TimespanUnit.DAYS || value < amount || value % amount != 0) { break; } value /= amount; } return String.format("%d%s%s", value, separation, result.text); } // This method reduces the number of loaded classes // compared to DateTimeFormatter public static String formatDateTime(LocalDateTime time) { StringBuilder sb = new StringBuilder(19); sb.append(time.getYear() / 100); appendPadded(sb, time.getYear() % 100, true); appendPadded(sb, time.getMonth().getValue(), true); appendPadded(sb, time.getDayOfMonth(), true); appendPadded(sb, time.getHour(), true); appendPadded(sb, time.getMinute(), true); appendPadded(sb, time.getSecond(), false); return sb.toString(); } private static void appendPadded(StringBuilder text, int number, boolean separator) { if (number < 10) { text.append('0'); } text.append(number); if (separator) { text.append('_'); } } enum ThrottleUnit { NANOSECONDS("ns", TimeUnit.SECONDS.toNanos(1), TimeUnit.SECONDS.toMillis(1)), MICROSECONDS("us", TimeUnit.SECONDS.toNanos(1) / 1000, TimeUnit.SECONDS.toMillis(1)), MILLISECONDS("ms", TimeUnit.SECONDS.toMillis(1), TimeUnit.SECONDS.toMillis(1)), SECONDS("s", 1, TimeUnit.SECONDS.toMillis(1)), MINUTES("m", 1, TimeUnit.MINUTES.toMillis(1)), HOUR("h", 1, TimeUnit.HOURS.toMillis(1)), DAY("d", 1, TimeUnit.DAYS.toMillis(1)); private final String text; private final long factor; private final long millis; ThrottleUnit(String t, long factor, long millis) { this.text = t; this.factor = factor; this.millis = millis; } private static ThrottleUnit parse(String s) { if (s.equals(OFF)) { return MILLISECONDS; } return unit(parseThrottleString(s, false)); } private static ThrottleUnit unit(String s) { if (s.endsWith("ns") || s.endsWith("us") || s.endsWith("ms")) { return value(s.substring(s.length() - 2)); } if (s.endsWith("s") || s.endsWith("m") || s.endsWith("h") || s.endsWith("d")) { return value(s.substring(s.length() - 1)); } throw new NumberFormatException("'" + s + "' is not a valid time unit."); } private static ThrottleUnit value(String s) { for (ThrottleUnit t : values()) { if (t.text.equals(s)) { return t; } } throw new NumberFormatException("'" + s + "' is not a valid time unit."); } static long asMillis(String s) { return parse(s).millis; } static long normalizeValueAsMillis(long value, String s) { return value * parse(s).factor; } } private static void throwThrottleNumberFormatException(String s) { throw new NumberFormatException("'" + s + "' is not valid. Should be a non-negative numeric value followed by a delimiter. i.e. '/', and then followed by a unit e.g. 100/s."); } // Expected input format is "x/y" where x is a non-negative long // and y is a time unit. Split the string at the delimiter. private static String parseThrottleString(String s, boolean value) { String[] split = s.split("/"); if (split.length != 2) { throwThrottleNumberFormatException(s); } return value ? split[0].trim() : split[1].trim(); } public static long parseThrottleValue(String s) { if (s.equals(OFF)) { return THROTTLE_OFF; } String parsedValue = parseThrottleString(s, true); long normalizedValue = 0; try { normalizedValue = ThrottleUnit.normalizeValueAsMillis(Long.parseLong(parsedValue), s); } catch (NumberFormatException nfe) { throwThrottleNumberFormatException(s); } return normalizedValue; } public static long parseThrottleTimeUnit(String s) { return ThrottleUnit.asMillis(s); } public static long parseTimespanWithInfinity(String s) { if (INFINITY.equals(s)) { return Long.MAX_VALUE; } return parseTimespan(s); } public static long parseTimespan(String s) { if (s.endsWith("ns")) { return Long.parseLong(s.substring(0, s.length() - 2).trim()); } if (s.endsWith("us")) { return NANOSECONDS.convert(Long.parseLong(s.substring(0, s.length() - 2).trim()), MICROSECONDS); } if (s.endsWith("ms")) { return NANOSECONDS.convert(Long.parseLong(s.substring(0, s.length() - 2).trim()), MILLISECONDS); } if (s.endsWith("s")) { return NANOSECONDS.convert(Long.parseLong(s.substring(0, s.length() - 1).trim()), SECONDS); } if (s.endsWith("m")) { return 60 * NANOSECONDS.convert(Long.parseLong(s.substring(0, s.length() - 1).trim()), SECONDS); } if (s.endsWith("h")) { return 60 * 60 * NANOSECONDS.convert(Long.parseLong(s.substring(0, s.length() - 1).trim()), SECONDS); } if (s.endsWith("d")) { return 24 * 60 * 60 * NANOSECONDS.convert(Long.parseLong(s.substring(0, s.length() - 1).trim()), SECONDS); } try { Long.parseLong(s); } catch (NumberFormatException nfe) { throw new NumberFormatException("'" + s + "' is not a valid timespan. Should be numeric value followed by a unit, i.e. 20 ms. Valid units are ns, us, s, m, h and d."); } // Only accept values with units throw new NumberFormatException("Timespan + '" + s + "' is missing unit. Valid units are ns, us, s, m, h and d."); } /** * Return all annotations as they are visible in the source code * * @param clazz class to return annotations from * * @return list of annotation * */ static List<Annotation> getAnnotations(Class<?> clazz) { List<Annotation> annos = new ArrayList<>(); for (Annotation a : clazz.getAnnotations()) { annos.addAll(getAnnotation(a)); } return annos; } private static List<? extends Annotation> getAnnotation(Annotation a) { Class<?> annotated = a.annotationType(); Method valueMethod = getValueMethod(annotated); if (valueMethod != null) { Class<?> returnType = valueMethod.getReturnType(); if (returnType.isArray()) { Class<?> candidate = returnType.getComponentType(); Repeatable r = candidate.getAnnotation(Repeatable.class); if (r != null) { Class<?> repeatClass = r.value(); if (annotated == repeatClass) { return getAnnotationValues(a, valueMethod); } } } } return List.of(a); } static boolean isAfter(RecordingState stateToTest, RecordingState b) { return stateToTest.ordinal() > b.ordinal(); } static boolean isBefore(RecordingState stateToTest, RecordingState b) { return stateToTest.ordinal() < b.ordinal(); } static boolean isState(RecordingState stateToTest, RecordingState... states) { for (RecordingState s : states) { if (s == stateToTest) { return true; } } return false; } private static List<Annotation> getAnnotationValues(Annotation a, Method valueMethod) { try { return Arrays.asList((Annotation[]) valueMethod.invoke(a, new Object[0])); } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) { return new ArrayList<>(); } } private static Method getValueMethod(Class<?> annotated) { try { return annotated.getMethod("value", new Class<?>[0]); } catch (NoSuchMethodException e) { return null; } } public static void touch(Path dumpFile) throws IOException { RandomAccessFile raf = new RandomAccessFile(dumpFile.toFile(), "rw"); raf.close(); } public static Class<?> unboxType(Class<?> t) { if (t == Integer.class) { return int.class; } if (t == Long.class) { return long.class; } if (t == Float.class) { return float.class; } if (t == Double.class) { return double.class; } if (t == Byte.class) { return byte.class; } if (t == Short.class) { return short.class; } if (t == Boolean.class) { return boolean.class; } if (t == Character.class) { return char.class; } return t; } static long nanosToTicks(long nanos) { return (long) (nanos * JVM.getJVM().getTimeConversionFactor()); } public static synchronized EventHandler getHandler(Class<? extends jdk.internal.event.Event> eventClass) { Utils.ensureValidEventSubclass(eventClass); Object handler = JVM.getJVM().getHandler(eventClass); if (handler == null || handler instanceof EventHandler) { return (EventHandler) handler; } throw new InternalError("Could not access event handler"); } static synchronized void setHandler(Class<? extends jdk.internal.event.Event> eventClass, EventHandler handler) { Utils.ensureValidEventSubclass(eventClass); if (!JVM.getJVM().setHandler(eventClass, handler)) { throw new InternalError("Could not set event handler"); } } public static Map<String, String> sanitizeNullFreeStringMap(Map<String, String> settings) { HashMap<String, String> map = new HashMap<>(settings.size()); for (Map.Entry<String, String> e : settings.entrySet()) { String key = e.getKey(); if (key == null) { throw new NullPointerException("Null key is not allowed in map"); } String value = e.getValue(); if (value == null) { throw new NullPointerException("Null value is not allowed in map"); } map.put(key, value); } return map; } public static <T> List<T> sanitizeNullFreeList(List<T> elements, Class<T> clazz) { List<T> sanitized = new ArrayList<>(elements.size()); for (T element : elements) { if (element == null) { throw new NullPointerException("Null is not an allowed element in list"); } if (element.getClass() != clazz) { throw new ClassCastException(); } sanitized.add(element); } return sanitized; } static List<Field> getVisibleEventFields(Class<?> clazz) { Utils.ensureValidEventSubclass(clazz); List<Field> fields = new ArrayList<>(); for (Class<?> c = clazz; c != jdk.internal.event.Event.class; c = c.getSuperclass()) { for (Field field : c.getDeclaredFields()) { // skip private field in base classes if (c == clazz || !Modifier.isPrivate(field.getModifiers())) { fields.add(field); } } } return fields; } public static void ensureValidEventSubclass(Class<?> eventClass) { if (jdk.internal.event.Event.class.isAssignableFrom(eventClass) && Modifier.isAbstract(eventClass.getModifiers())) { throw new IllegalArgumentException("Abstract event classes are not allowed"); } if (eventClass == Event.class || eventClass == jdk.internal.event.Event.class || !jdk.internal.event.Event.class.isAssignableFrom(eventClass)) { throw new IllegalArgumentException("Must be a subclass to " + Event.class.getName()); } } public static void writeGeneratedASM(String className, byte[] bytes) { if (SAVE_GENERATED == null) { // We can't calculate value statically because it will force // initialization of SecuritySupport, which cause // UnsatisfiedLinkedError on JDK 8 or non-Oracle JDKs SAVE_GENERATED = SecuritySupport.getBooleanProperty("jfr.save.generated.asm"); } if (SAVE_GENERATED) { try { try (FileOutputStream fos = new FileOutputStream(className + ".class")) { fos.write(bytes); } try (FileWriter fw = new FileWriter(className + ".asm"); PrintWriter pw = new PrintWriter(fw)) { ClassReader cr = new ClassReader(bytes); CheckClassAdapter.verify(cr, true, pw); } Logger.log(LogTag.JFR_SYSTEM_BYTECODE, LogLevel.INFO, "Instrumented code saved to " + className + ".class and .asm"); } catch (IOException e) { Logger.log(LogTag.JFR_SYSTEM_BYTECODE, LogLevel.INFO, "Could not save instrumented code, for " + className + ".class and .asm"); } } } public static void ensureInitialized(Class<? extends jdk.internal.event.Event> eventClass) { SecuritySupport.ensureClassIsInitialized(eventClass); } public static Object makePrimitiveArray(String typeName, List<Object> values) { int length = values.size(); switch (typeName) { case "int": int[] ints = new int[length]; for (int i = 0; i < length; i++) { ints[i] = (int) values.get(i); } return ints; case "long": long[] longs = new long[length]; for (int i = 0; i < length; i++) { longs[i] = (long) values.get(i); } return longs; case "float": float[] floats = new float[length]; for (int i = 0; i < length; i++) { floats[i] = (float) values.get(i); } return floats; case "double": double[] doubles = new double[length]; for (int i = 0; i < length; i++) { doubles[i] = (double) values.get(i); } return doubles; case "short": short[] shorts = new short[length]; for (int i = 0; i < length; i++) { shorts[i] = (short) values.get(i); } return shorts; case "char": char[] chars = new char[length]; for (int i = 0; i < length; i++) { chars[i] = (char) values.get(i); } return chars; case "byte": byte[] bytes = new byte[length]; for (int i = 0; i < length; i++) { bytes[i] = (byte) values.get(i); } return bytes; case "boolean": boolean[] booleans = new boolean[length]; for (int i = 0; i < length; i++) { booleans[i] = (boolean) values.get(i); } return booleans; case "java.lang.String": String[] strings = new String[length]; for (int i = 0; i < length; i++) { strings[i] = (String) values.get(i); } return strings; } return null; } public static boolean isSettingVisible(Control c, boolean hasEventHook) { if (c.isType(ThresholdSetting.class)) { return !hasEventHook; } if (c.isType(PeriodSetting.class)) { return hasEventHook; } if (c.isType(StackTraceSetting.class)) { return !hasEventHook; } return true; } public static boolean isSettingVisible(long typeId, boolean hasEventHook) { if (ThresholdSetting.isType(typeId)) { return !hasEventHook; } if (PeriodSetting.isType(typeId)) { return hasEventHook; } if (StackTraceSetting.isType(typeId)) { return !hasEventHook; } return true; } public static Type getValidType(Class<?> type, String name) { Objects.requireNonNull(type, "Null is not a valid type for value descriptor " + name); if (type.isArray()) { type = type.getComponentType(); if (type != String.class && !type.isPrimitive()) { throw new IllegalArgumentException("Only arrays of primitives and Strings are allowed"); } } Type knownType = Type.getKnownType(type); if (knownType == null || knownType == Type.STACK_TRACE) { throw new IllegalArgumentException("Only primitive types, java.lang.Thread, java.lang.String and java.lang.Class are allowed for value descriptors. " + type.getName()); } return knownType; } public static String upgradeLegacyJDKEvent(String eventName) { if (eventName.length() <= LEGACY_EVENT_NAME_PREFIX.length()) { return eventName; } if (eventName.startsWith(LEGACY_EVENT_NAME_PREFIX)) { int index = eventName.lastIndexOf("."); if (index == LEGACY_EVENT_NAME_PREFIX.length() - 1) { return Type.EVENT_NAME_PREFIX + eventName.substring(index + 1); } } return eventName; } public static void verifyMirror(Class<?> mirror, Class<?> real) { Class<?> cMirror = Objects.requireNonNull(mirror); Class<?> cReal = Objects.requireNonNull(real); Map<String, Field> mirrorFields = new HashMap<>(); while (cMirror != null) { for (Field f : cMirror.getDeclaredFields()) { if (isSupportedType(f.getType())) { mirrorFields.put(f.getName(), f); } } cMirror = cMirror.getSuperclass(); } while (cReal != null) { for (Field realField : cReal.getDeclaredFields()) { if (isSupportedType(realField.getType())) { String fieldName = realField.getName(); Field mirrorField = mirrorFields.get(fieldName); if (mirrorField == null) { throw new InternalError("Missing mirror field for " + cReal.getName() + "#" + fieldName); } if (realField.getType() != mirrorField.getType()) { throw new InternalError("Incorrect type for mirror field " + fieldName); } if (realField.getModifiers() != mirrorField.getModifiers()) { throw new InternalError("Incorrect modifier for mirror field " + fieldName); } mirrorFields.remove(fieldName); } } cReal = cReal.getSuperclass(); } if (!mirrorFields.isEmpty()) { throw new InternalError("Found additional fields in mirror class " + mirrorFields.keySet()); } } private static boolean isSupportedType(Class<?> type) { if (Modifier.isTransient(type.getModifiers()) || Modifier.isStatic(type.getModifiers())) { return false; } return Type.isValidJavaFieldType(type.getName()); } public static String makeFilename(Recording recording) { String pid = JVM.getJVM().getPid(); String date = formatDateTime(LocalDateTime.now()); String idText = recording == null ? "" : "-id-" + Long.toString(recording.getId()); return "hotspot-" + "pid-" + pid + idText + "-" + date + ".jfr"; } public static String formatDuration(Duration d) { Duration roundedDuration = roundDuration(d); if (roundedDuration.equals(Duration.ZERO)) { return "0 s"; } else if(roundedDuration.isNegative()){ return "-" + formatPositiveDuration(roundedDuration.abs()); } else { return formatPositiveDuration(roundedDuration); } } public static boolean shouldSkipBytecode(String eventName, Class<?> superClass) { if (superClass.getClassLoader() != null || !superClass.getName().equals("jdk.jfr.events.AbstractJDKEvent")) { return false; } return eventName.startsWith("jdk.Container") && getMetrics() == null; } private static Metrics getMetrics() { if (metrics == null) { metrics = new Metrics[]{Metrics.systemMetrics()}; } return metrics[0]; } private static String formatPositiveDuration(Duration d){ if (d.compareTo(MICRO_SECOND) < 0) { // 0.000001 ms - 0.000999 ms double outputMs = (double) d.toNanosPart() / 1_000_000; return String.format("%.6f ms", outputMs); } else if (d.compareTo(SECOND) < 0) { // 0.001 ms - 999 ms int valueLength = countLength(d.toNanosPart()); int outputDigit = NANO_SIGNIFICANT_FIGURES - valueLength; double outputMs = (double) d.toNanosPart() / 1_000_000; return String.format("%." + outputDigit + "f ms", outputMs); } else if (d.compareTo(MINUTE) < 0) { // 1.00 s - 59.9 s int valueLength = countLength(d.toSecondsPart()); int outputDigit = MILL_SIGNIFICANT_FIGURES - valueLength; double outputSecond = d.toSecondsPart() + (double) d.toMillisPart() / 1_000; return String.format("%." + outputDigit + "f s", outputSecond); } else if (d.compareTo(HOUR) < 0) { // 1 m 0 s - 59 m 59 s return String.format("%d m %d s", d.toMinutesPart(), d.toSecondsPart()); } else if (d.compareTo(DAY) < 0) { // 1 h 0 m - 23 h 59 m return String.format("%d h %d m", d.toHoursPart(), d.toMinutesPart()); } else { // 1 d 0 h - return String.format("%d d %d h", d.toDaysPart(), d.toHoursPart()); } } private static int countLength(long value){ return (int) Math.log10(value) + 1; } private static Duration roundDuration(Duration d) { if (d.equals(Duration.ZERO)) { return d; } else if(d.isNegative()){ Duration roundedPositiveDuration = roundPositiveDuration(d.abs()); return roundedPositiveDuration.negated(); } else { return roundPositiveDuration(d); } } private static Duration roundPositiveDuration(Duration d){ if (d.compareTo(MICRO_SECOND) < 0) { // No round return d; } else if (d.compareTo(SECOND) < 0) { // Round significant figures to three digits int valueLength = countLength(d.toNanosPart()); int roundValue = (int) Math.pow(BASE, valueLength - DISPLAY_NANO_DIGIT); long roundedNanos = Math.round((double) d.toNanosPart() / roundValue) * roundValue; return d.truncatedTo(ChronoUnit.SECONDS).plusNanos(roundedNanos); } else if (d.compareTo(MINUTE) < 0) { // Round significant figures to three digits int valueLength = countLength(d.toSecondsPart()); int roundValue = (int) Math.pow(BASE, valueLength); long roundedMills = Math.round((double) d.toMillisPart() / roundValue) * roundValue; return d.truncatedTo(ChronoUnit.SECONDS).plusMillis(roundedMills); } else if (d.compareTo(HOUR) < 0) { // Round for more than 500 ms or less return d.plusMillis(SECOND.dividedBy(2).toMillisPart()).truncatedTo(ChronoUnit.SECONDS); } else if (d.compareTo(DAY) < 0) { // Round for more than 30 seconds or less return d.plusSeconds(MINUTE.dividedBy(2).toSecondsPart()).truncatedTo(ChronoUnit.MINUTES); } else { // Round for more than 30 minutes or less return d.plusMinutes(HOUR.dividedBy(2).toMinutesPart()).truncatedTo(ChronoUnit.HOURS); } } public static void takeNap(long millis) { try { Thread.sleep(millis); } catch (InterruptedException e) { // ok } } public static void notifyFlush() { synchronized (flushObject) { flushObject.notifyAll(); } } public static void waitFlush(long timeOut) { synchronized (flushObject) { try { flushObject.wait(timeOut); } catch (InterruptedException e) { // OK } } } public static Instant epochNanosToInstant(long epochNanos) { return Instant.ofEpochSecond(0, epochNanos); } public static long timeToNanos(Instant timestamp) { return timestamp.getEpochSecond() * 1_000_000_000L + timestamp.getNano(); } }
⏎ jdk/jfr/internal/Utils.java
Or download all of them as a single archive file:
File name: jdk.jfr-17.0.5-src.zip File size: 363343 bytes Release date: 2022-09-13 Download
⇒ JDK 17 jdk.jlink.jmod - JLink Tool
2023-04-17, 8985👍, 0💬
Popular Posts:
What Is HttpComponents httpclient-4.2.2.jar? HttpComponents httpclient-4.2.2.jar is the JAR file for...
What Is jaxb-impl-2.1.12.jar? Java Architecture for XML Binding (JAXB) is a Java API that allows Jav...
commons-lang-1.0.1.jar is the JAR file for Apache Commons Lang 1.0.1, which provides a host of helpe...
kernel.jar is a component in iText Java library to provide low-level functionalities. iText Java lib...
Commons VFS provides a single API for accessing various different file systems. It presents a unifor...