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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.hudi.common.util;
import java.time.Duration;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.time.temporal.ChronoUnit;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;
/**
* Utils for Hudi instant time.
*/
public class DateTimeUtils {
private static final Map LABEL_TO_UNIT_MAP =
Collections.unmodifiableMap(initMap());
/**
* Converts provided microseconds (from epoch) to {@link Instant}
*/
public static Instant microsToInstant(long microsFromEpoch) {
long epochSeconds = microsFromEpoch / (1_000_000L);
long nanoAdjustment = (microsFromEpoch % (1_000_000L)) * 1_000L;
return Instant.ofEpochSecond(epochSeconds, nanoAdjustment);
}
/**
* Converts provided {@link Instant} to microseconds (from epoch)
*/
public static long instantToMicros(Instant instant) {
long seconds = instant.getEpochSecond();
int nanos = instant.getNano();
if (seconds < 0 && nanos > 0) {
long micros = Math.multiplyExact(seconds + 1, 1_000_000L);
long adjustment = (nanos / 1_000L) - 1_000_000;
return Math.addExact(micros, adjustment);
} else {
long micros = Math.multiplyExact(seconds, 1_000_000L);
return Math.addExact(micros, nanos / 1_000L);
}
}
/**
* Parse input String to a {@link java.time.Instant}.
*
* @param s Input String should be Epoch time in millisecond or ISO-8601 format.
*/
public static Instant parseDateTime(String s) throws DateTimeParseException {
ValidationUtils.checkArgument(Objects.nonNull(s), "Input String cannot be null.");
try {
return Instant.ofEpochMilli(Long.parseLong(s));
} catch (NumberFormatException e) {
return Instant.parse(s);
}
}
/**
* Parse the given string to a java {@link Duration}. The string is in format "{length
* value}{time unit label}", e.g. "123ms", "321 s". If no time unit label is specified, it will
* be considered as milliseconds.
*
* Supported time unit labels are:
*
*
* - DAYS： "d", "day"
*
- HOURS： "h", "hour"
*
- MINUTES： "min", "minute"
*
- SECONDS： "s", "sec", "second"
*
- MILLISECONDS： "ms", "milli", "millisecond"
*
- MICROSECONDS： "µs", "micro", "microsecond"
*
- NANOSECONDS： "ns", "nano", "nanosecond"
*
*
* @param text string to parse.
*/
public static Duration parseDuration(String text) {
ValidationUtils.checkArgument(!StringUtils.isNullOrEmpty(text));
final String trimmed = text.trim();
ValidationUtils.checkArgument(!trimmed.isEmpty(), "argument is an empty- or whitespace-only string");
final int len = trimmed.length();
int pos = 0;
char current;
while (pos < len && (current = trimmed.charAt(pos)) >= '0' && current <= '9') {
pos++;
}
final String number = trimmed.substring(0, pos);
final String unitLabel = trimmed.substring(pos).trim().toLowerCase(Locale.US);
if (number.isEmpty()) {
throw new NumberFormatException("text does not start with a number");
}
final long value;
try {
value = Long.parseLong(number); // this throws a NumberFormatException on overflow
} catch (NumberFormatException e) {
throw new IllegalArgumentException(
"The value '"
+ number
+ "' cannot be re represented as 64bit number (numeric overflow).");
}
if (unitLabel.isEmpty()) {
return Duration.of(value, ChronoUnit.MILLIS);
}
ChronoUnit unit = LABEL_TO_UNIT_MAP.get(unitLabel);
if (unit != null) {
return Duration.of(value, unit);
} else {
throw new IllegalArgumentException(
"Time interval unit label '"
+ unitLabel
+ "' does not match any of the recognized units: "
+ TimeUnit.getAllUnits());
}
}
private static Map initMap() {
Map labelToUnit = new HashMap<>();
for (TimeUnit timeUnit : TimeUnit.values()) {
for (String label : timeUnit.getLabels()) {
labelToUnit.put(label, timeUnit.getUnit());
}
}
return labelToUnit;
}
/**
* Convert UNIX_TIMESTAMP to string in given format.
*
* @param unixTimestamp UNIX_TIMESTAMP
* @param timeFormat string time format
*/
public static String formatUnixTimestamp(long unixTimestamp, String timeFormat) {
ValidationUtils.checkArgument(!StringUtils.isNullOrEmpty(timeFormat));
DateTimeFormatter dtf = DateTimeFormatter.ofPattern(timeFormat);
return LocalDateTime
.ofInstant(Instant.ofEpochSecond(unixTimestamp), ZoneId.systemDefault())
.format(dtf);
}
/**
* Enum which defines time unit, mostly used to parse value from configuration file.
*/
private enum TimeUnit {
DAYS(ChronoUnit.DAYS, singular("d"), plural("day")),
HOURS(ChronoUnit.HOURS, singular("h"), plural("hour")),
MINUTES(ChronoUnit.MINUTES, singular("min"), plural("minute")),
SECONDS(ChronoUnit.SECONDS, singular("s"), plural("sec"), plural("second")),
MILLISECONDS(ChronoUnit.MILLIS, singular("ms"), plural("milli"), plural("millisecond")),
MICROSECONDS(ChronoUnit.MICROS, singular("µs"), plural("micro"), plural("microsecond")),
NANOSECONDS(ChronoUnit.NANOS, singular("ns"), plural("nano"), plural("nanosecond"));
private static final String PLURAL_SUFFIX = "s";
private final List labels;
private final ChronoUnit unit;
TimeUnit(ChronoUnit unit, String[]... labels) {
this.unit = unit;
this.labels =
Arrays.stream(labels)
.flatMap(Arrays::stream)
.collect(Collectors.toList());
}
/**
* @param label the original label
* @return the singular format of the original label
*/
private static String[] singular(String label) {
return new String[] {label};
}
/**
* @param label the original label
* @return both the singular format and plural format of the original label
*/
private static String[] plural(String label) {
return new String[] {label, label + PLURAL_SUFFIX};
}
public List getLabels() {
return labels;
}
public ChronoUnit getUnit() {
return unit;
}
public static String getAllUnits() {
return Arrays.stream(TimeUnit.values())
.map(TimeUnit::createTimeUnitString)
.collect(Collectors.joining(", "));
}
private static String createTimeUnitString(TimeUnit timeUnit) {
return timeUnit.name() + ": (" + String.join(" | ", timeUnit.getLabels()) + ")";
}
}
}