Github user nickwallen commented on a diff in the pull request:
https://github.com/apache/incubator-metron/pull/276#discussion_r82502874
--- Diff:
metron-platform/metron-parsers/src/main/java/org/apache/metron/parsers/utils/SyslogUtils.java
---
@@ -0,0 +1,89 @@
+/**
+ * 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.metron.parsers.utils;
+
+import java.time.ZoneOffset;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+
+public class SyslogUtils {
+
+ public static long convertToEpochMillis(String logTimestamp, String
logTimeFormat) {
+ ZonedDateTime timestamp = ZonedDateTime.parse(logTimestamp,
DateTimeFormatter.ofPattern(logTimeFormat).withZone(ZoneOffset.UTC));
+ return timestamp.toEpochSecond() * 1000;
+ }
+
+ public static long parseTimestampToEpochMillis(String logTimestamp) {
+ if (logTimestamp.length() < 20) {
+ ZonedDateTime now = ZonedDateTime.now(ZoneOffset.UTC);
+ int year = now.getYear();
+ if (now.getDayOfYear() == 1 &&
!now.getMonth().toString().substring(0,3).equals(logTimestamp.substring(0,3).toUpperCase()))
+ year--;
--- End diff --
Gotcha. So anything that comes in on the first day of the year, with a
month that is not January, will be backdated.
If something comes in on the 2nd day of the year, with a month of December,
it will NOT be backdated. The period of time that we are willing to backdate,
is effectively 1 day currently.
Maybe that time period needs to be configurable. The user defines the
period of time, 1 day, 2 days, 1 week, after the beginning of the year in which
messages can possibly be backdated.
Are there certain conditions under which the logic should blow-up and
error? What if we are going to backdate a message where the month is July?
Should we just do that or should we error?
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