This is a java library that tries to parse and analyze the useragent string (and when available the User-Agent Client Hints) and extract as many relevant attributes as possible.
Works with Java, Scala, Kotlin and provides ready for use UDFs for several processing systems.
The full documentation can be found here https://yauaa.basjes.nl
The Yauaa analyzer uses the Log4J2 API to do the logging.
By design the Yauaa library expects the application in which it is used to provide the actual logging dependencies and configuration. If you do not provide the needed logging classes it will simply fail at startup.
So by design the Yauaa library expects all of these frameworks to be provided (and configured) and does not include any of them or any configuration for them.
This is true for most of the released artifacts (including the base library) except for the Snowflake UDF which does include almost all dependencies. So the Snowflake UDF IS affected by this issue and all users are recommended to update.
Note that Yauaa does not log any user input and/or analysis results from user input during normal operation. Only during development and during unit tests the Useragents are logged.
This is because it was designed to run in very large scale batch and streaming situations (very large as in “Let’s analyze these 10^10 records”).
To assist in running Yauaa without the logj4-core jar an example was created that only uses SLF4J: here.
If this project has business value for you then don’t hesitate to support me with a small donation.
Yet Another UserAgent Analyzer Copyright (C) 2013-2023 Niels Basjes 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 https://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.