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From "Remko Popma (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-1178) Support use-case for JDBC's DataSource.setLogWriter(PrintStream)
Date Mon, 26 Oct 2015 00:14:27 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-1178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14973515#comment-14973515

Remko Popma commented on LOG4J2-1178:

I thought this use case was why we introduced the log4j-io module. Why does that module not
solve the problem?

> Support use-case for JDBC's DataSource.setLogWriter(PrintStream)
> ----------------------------------------------------------------
>                 Key: LOG4J2-1178
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1178
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Appenders
>         Environment: Apache Maven 3.3.3 (7994120775791599e205a5524ec3e0dfe41d4a06; 2015-04-22T04:57:37-07:00)
> Maven home: C:\Java\apache-maven-3.3.3\bin\..
> Java version: 1.7.0_79, vendor: Oracle Corporation
> Java home: C:\Program Files\Java\jdk1.7.0_79\jre
> Default locale: en_US, platform encoding: Cp1252
> OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"
>            Reporter: Gary Gregory
> I am writing a JDBC driver. The JDBC Spec has a a method [DataSource.setLogWriter(PrintStream)|https://docs.oracle.com/javase/8/docs/api/javax/sql/CommonDataSource.html#setLogWriter-java.io.PrintWriter-]
API drivers should implement.
> Users can drop our driver into any tool that talks JDBC or write their own apps. In am
concerned about the 'drop the driver anywhere' scenario, like in an Eclipse based tool; that
may or may not use Eclipse DTP. Or anything else.
> The [setLogWriter()|https://docs.oracle.com/javase/8/docs/api/javax/sql/CommonDataSource.html#setLogWriter-java.io.PrintWriter-]
API can be called at any time, after Log4j has initialized itself for example.
> I do all my driver logging through Log4j. If a tool calls [setLogWriter()|https://docs.oracle.com/javase/8/docs/api/javax/sql/CommonDataSource.html#setLogWriter-java.io.PrintWriter-],
I'd like the given PrintStream to become an Appender such that Log4j output appears there.
> The only way I see to do that is through pseudo-code like "getLoggerContext().getConfiguration().addAppender(PrintStreamAppender.createPrintStreamAppender(aPrintStream))"
> I think that would need to be followed by a full reconfigure.
> Can we use our new builder API to add to the current config and reconfigure?

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