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I need to monitor a log file for a pattern. The log file continually gets written by an application.
I do not want to re-invent the wheel. I am looking for a Java API. I wrote a program to read file and put in a loop with 30 seconds sleep, but that does not meet all the criteria.
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Log monitoring is a process by which developers and administrators continuously observe logs as they're recorded. With log monitoring software, teams can collect information and trigger alerts if something affects system performance and health.
Log files include information about system performance that can be used to determine when additional capacity is needed to optimize the user experience. Log files can help analysts identify slow queries, errors that are causing transactions to take too long or bugs that impact website or application performance.
This is such a crucial folder on your Linux systems. Open up a terminal window and issue the command cd /var/log. Now issue the command ls and you will see the logs housed within this directory (Figure 1).
You might consider looking at apache commons io classes, in particular Tailer/TailerListener classes. See http://www.devdaily.com/java/jwarehouse/commons-io-2.0/src/main/java/org/apache/commons/io/input/Tailer.java.shtml.
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