Community Blog Real-Time Java Logs Collection with Appender

Real-Time Java Logs Collection with Appender

In this article, we will introduce how to collect real-time java logs with Appender.

Java applications currently have two mainstream log collection solutions:

  1. Java programs flush logs to disks and use Logtail for real-time collection.
  2. Java programs directly configure the Appender provided by Log Service. When the program is running, logs are sent to Log Service in real time.

By using Appender, you can use Config to complete real-time log collection easily without changing any code.

You can integrate Appender by performing the configuration steps of aliyun-log-log4j-appender.

The contents of the configuration file log4j.properties are as follows:



# Log Service project name (required parameter)
log4j.appender.loghub.projectName=[your project]
# Log Service LogStore name (required parameter)
log4j.appender.loghub.logstore=[your logstore]
#Log Service HTTP address (required parameter)
log4j.appender.loghub.endpoint=[your project endpoint]
# User identity (required parameter)
log4j.appender.loghub.accessKeyId=[your accesskey id]
log4j.appender.loghub.accessKey=[your accesskey]

After configuring the Appender as described in the previous step, the logs produced by Java applications are automatically sent to Log Service. You can use LogSearch/Analytics to query and analyze these logs in real time. For details, please go to 3 Ways to Migrate Java Logs to the Cloud: Log4J, LogBack, and Producer Lib.

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Related Documentation

How do I collect various formats of logs in complete regular mode?

The complete regular mode requires format consistency among all logs. However, some logs may contain content in multiple formats. In this case, you can use the Schema-On-Write or Schema-On-Read mode to process the logs.

For example, a Java log is a program log that contains both correct information and error information (such as information about abnormal stacks), including:

  1. Multi-line WARNING logs
  2. Simple text INFO logs
  3. Key-value DEBUG logs

Log4j Appender

Log4j is an open source logging framework developed by Apache. You can use Log4j to print logs to a console, file, Graphical User Interface (GUI) component, socket server, NT kernel logger, or Unix syslog daemon. You can define the output format of each log entry. You can also define the level of each log entry to achieve fine-grained control over the generation of logs.

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