Nick Williams created LOG4J2-229:
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Summary: New JDBC, JPA, and NoSQL Database Appenders for Log4j2
Key: LOG4J2-229
URL: https://issues.apache.org/jira/browse/LOG4J2-229
Project: Log4j 2
Issue Type: New Feature
Components: Appenders, Core
Affects Versions: 2.0-beta5
Reporter: Nick Williams
Attachments: db-appenders.patch
As discussed on the mailing list ([1] and [2]), Log4j 2 is in need of some
database appenders. I have added this new feature and will attach a patch
shortly. The patch contains:
- A slight change to PatternLayout. Currently it is not possible to create a
PatternLayout that doesn't always handle exceptions. If you leave all exception
handling out of the pattern, an exception handler is forcibly added to the end
of the pattern. This behavior is controlled by a flag, but that flag is always
hard-coded to false. I added a parameter for it. This was necessary for the
JDBC appender.
- o.a.l.l.core.appender.db.AbstractDatabaseManager and
AbstractDatabaseAppender, together in concert, take care of some core
functionality common across all database appenders, such as buffering and
connection state.
- o.a.l.l.core.appender.db.jdbc.JDBCAppender (and Manager, other classes)
supports writing events to a relational database using raw JDBC. It's
injection-safe due to the use of prepared statements. It can be configured with
URL/username/password, JNDI data source, or a connection factory method.
- o.a.l.l.core.appender.db.jpa.JPAAppender (and Manager, other classes)
supports writing events to a relational database using the Java Persistence API
version 2.0.
- o.a.l.l.core.appender.db.nosql.NoSQLAppender (and Manager, other classes)
supports writing to an abstract concept of a NoSQL provider. Providers have
been created for MongoDB and Apache CouchDB. Creating a new provider is
extremely easy.
- Thorough unit tests for the abstract classes, the JDBC and JPA appenders, and
the abstract parts of the NoSQLAppender. Directly unit testing the MongoDB and
CouchDB providers in a platform-independent way is not easy and may not be
possible.
- Thorough documentation (both JavaDoc and Site documentation) for all of the
appenders.
[1] http://markmail.org/thread/z2wpmwelv7p6xh2o
[2] http://markmail.org/thread/s7pljqdjhjz5xfk5
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