blob: cf071de2cd988706d890d9e1739b50bcce075d9b [file] [log] [blame]
// Copyright (C) 2020 The Android Open Source Project
//
// Licensed 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 com.google.gerrit.util.logging;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
/** Formatter for timestamps used in log entries. */
public class LogTimestampFormatter {
public static final String TIMESTAMP_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX";
private final DateTimeFormatter dateFormatter;
private final ZoneOffset timeOffset;
public LogTimestampFormatter() {
dateFormatter = DateTimeFormatter.ofPattern(TIMESTAMP_FORMAT);
timeOffset = OffsetDateTime.now(ZoneId.systemDefault()).getOffset();
}
/**
* Formats time given in milliseconds since UNIX epoch to ISO 8601 format.
*
* @param epochMilli milliseconds since UNIX epoch
* @return ISO 8601-formatted timestamp
*/
public String format(long epochMilli) {
return ZonedDateTime.of(
LocalDateTime.ofInstant(Instant.ofEpochMilli(epochMilli), timeOffset),
ZoneId.systemDefault())
.format(dateFormatter);
}
}