Unit tests in the log4j project. All our components have examples in unit
tests.
On Thu, Dec 12, 2019 at 04:26 Alban Hertroys <
alban.hertr...@apollovredestein.com> wrote:
> "Gary Gregory" <garydgreg...@gmail.com> wrote on 2019-12-11 22:01:54:
>
> > CAUTION : External email. Do not click links or open attachments
> > unless you recognize the sender and know the content is safe.
> >
> > AFK, sorry for the top-post. Have you looked at our unit tests? There
> might
> > be something there to help see what the usage pattern is for JNDI.
>
> You mean to say I should write some Java code to test the JNDI connection
> as defined in the Tomcat configuration? Or are the unit tests you refer to
> existing code that is available somewhere?
>
> Either way, I have no idea which unit tests you're referring to? I'm also
> not quite sure what I'm looking for here, I haven't done this before and I
> don't write Java code on a regular basis. Just created a few snippets to
> do small stuff here and there, such as this case where we're wrapping a
> servlet to have some logging of HTTP context information to a database
> table.
>
> There's no requirement here to do the logging through JNDI either; we used
> a direct connection through log4j.xml previously and that had some issues
> (mostly losing connection when the DB server got kicked). JNDI just seemed
> to be the easiest way to set up a connection pool for the JDBCAppender,
> but now it's starting to look like JNDI is anything but.
>
> Regards,
> Alban.
>
>
> > On Tue, Dec 10, 2019, 06:02 Alban Hertroys <
> > alban.hertr...@apollovredestein.com> wrote:
> >
> > > Hi,
> > >
> > > We're having a lot of trouble getting the JDBCAppender to write to our
> > > PostgreSQL database. There's probably a configuration error somewhere,
> but
> > > we haven't been able to find it. And I have been searching and trying
> for
> > > several days now, with no progress at all.
> > > Even though we specify a connection URL in the JDNI source (see
> below), it
> > > always ends with the JDBCAppender complaining that:
> > > java.sql.SQLException: Cannot create JDBC driver of class ''
> for
> > > connect URL 'null'
> > >
> > > The Appender should write the data to our database at server "foobar",
> > > database "logging-tst". Using the same credentials in SquirrelSQL,
> with
> > > the same JDBC driver, I can connect to that database and query the
> table
> > > specified in the log4j.xml (schema: "logging", table: "usage"; names
> being
> > > case-insensitive).
> > >
> > > Any pointers would be appreciated.
> > >
> > > Environment:
> > > - Centos 7
> > > - Apache Tomcat 8.5.32
> > > - log4j-2.11
> > >
> > > We created a servlet HTTP filter into a JAR, compiled against:
> > > WEB-INF/lib:
> > > log4j-api-2.11.0.jar log4j-core-2.11.0.jar
> > > servlet-api.jar
> > >
> > > This servlet put()'s certain fields into the ThreadContext, which we
> then
> > > attempt to access through %X{...} in the log4j2.xml, appending those
> > > fields as a
> > > row to an existing table in our database.
> > > We had this set-up working previously with log4j-1.something in an MS
> SQL
> > > '05
> > > DB, all on Windows 2003 server (which we are migrating away from due
> to
> > > performance issues).
> > >
> > > Files within the web application:
> > > WEB-INF/lib/
> > > log4j-1.2-api-2.11.0.jar log4j-api-2.11.0.jar
> > > log4j-core-2.11.0.jar log4j-jcl-2.11.0.jar log4j-jul-2.11.0.jar
> > > log4j-slf4j-impl-2.11.0.jar log4j-web-2.11.0.jar
> > > postgresql-jdbc.jar
> > >
> > >
> > > META-INF/context.xml:
> > > ---------------------
> > > <?xml version="1.0" encoding="utf-8"?>
> > > <context>
> > > <resource
> > > name="jdbc/loggingtst"
> > > auth="Container"
> > > type="javax.sql.DataSource"
> > > username="*****"
> > > password="*****"
> > > driverClassName="org.postgresql.Driver"
> > > url="jdbc:postgresql://foobar:5432/logging-tst"
> > > maxTotal="20"
> > > maxIdle="10"
> > > />
> > > </context>
> > >
> > >
> > > WEB-INF/classes/log4j2.xml:
> > > ---------------------------
> > > <?xml version="1.0" encoding="UTF-8"?>
> > > <Configuration status="WARN">
> > > ...
> > > <Appenders>
> > > ...
> > > <JDBC name="DBAppender" tableName="logging.usage">
> > > <DataSource jndiName="java:/comp/env/jdbc/loggingtst"/>
> > > <Column name="servername" pattern="%X{servername}"/>
> > > <Column name="fex" pattern="%X{focexec}"/>
> > > <Column name="parameters" pattern="%X{parameters}"/>
> > > <Column name="username" pattern="%X{username}"/>
> > > <Column name="duration" pattern="%X{duration}"/>
> > > <Column name="user_agent" pattern="%X{user-agent}"/>
> > > </JDBC>
> > > </Appenders>
> > > <Loggers>
> > > ...
> > > <Logger name="LogFilter" level="info" additivity="false">
> > > <AppenderRef ref="DBAppender"/>
> > > </Logger>
> > >
> > > <Root level="error">
> > > <AppenderRef ref="sysout" />
> > > </Root>
> > > </Loggers>
> > >
> > > </Configuration>
> > >
> > >
> > > WEB-INF/web.xml:
> > > ----------------
> > > ...
> > > <resource-ref>
> > > <description>PostgreSQL logging table</description>
> > > <res-ref-name>jdbc/loggingtst</res-ref-name>
> > > <res-type>javax.sql.DataSource</res-type>
> > > <res-auth>Container</res-auth>
> > > </resource-ref>
> > > ...
> > >
> > > With this, catalina.out contains:
> > >
> > > 2019-12-09 17:38:16,460 localhost-startStop-1 ERROR
> JdbcDatabaseManager
> > > JdbcManager{name=FexAppender, bufferSize=0, tableName=logging.usage,
> > > columnConfigs=[{ name=servername, layout=%X{servername}, literal=null,
> > > timestamp=false }, { name=fex, layout=%X{focexec}, literal=null,
> > > timestamp=false }, { name=parameters, layout=%X{parameters},
> literal=null,
> > > timestamp=false }, { name=username, layout=%X{username}, literal=null,
> > > timestamp=false }, { name=duration, layout=%X{duration}, literal=null,
> > > timestamp=false }, { name=user_agent, layout=%X{user-agent},
> literal=null,
> > > timestamp=false }], columnMappings=[]} Could not perform database
> startup
> > > operations: java.sql.SQLException: Cannot create JDBC driver of class
> ''
> > > for connect URL 'null' java.sql.SQLException: Cannot create JDBC
> driver of
> > > class '' for connect URL 'null'
> > > at
> > >
> > >
> > org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createConnectionFactory
> > (BasicDataSource.java:2186)
> > > at
> > >
> > > org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createDataSource
> > (BasicDataSource.java:2066)
> > > at
> > >
> > > org.apache.tomcat.dbcp.dbcp2.BasicDataSource.getConnection
> > (BasicDataSource.java:1525)
> > > at
> > >
> > >
> >
>
> org.apache.logging.log4j.core.appender.db.jdbc.DataSourceConnectionSource.getConnection
> > (DataSourceConnectionSource.java:51)
> > > at
> > >
> > >
> >
>
> org.apache.logging.log4j.core.appender.db.jdbc.JdbcDatabaseManager.startupInternal
> > (JdbcDatabaseManager.java:85)
> > > at
> > >
> > >
> >
> org.apache.logging.log4j.core.appender.db.AbstractDatabaseManager.startup
> > (AbstractDatabaseManager.java:81)
> > > at
> > >
> > >
> > org.apache.logging.log4j.core.appender.db.AbstractDatabaseAppender.start
> > (AbstractDatabaseAppender.java:106)
> > > at
> > >
> > > org.apache.logging.log4j.core.config.AbstractConfiguration.start
> > (AbstractConfiguration.java:265)
> > > at
> > >
> > > org.apache.logging.log4j.core.LoggerContext.setConfiguration
> > (LoggerContext.java:547)
> > > at
> > >
> org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:263)
> > > at
> > >
> > > org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext
> > (Log4jContextFactory.java:240)
> > > at
> > >
> > > org.apache.logging.log4j.core.config.Configurator.initialize
> > (Configurator.java:158)
> > > at
> > >
> > >
> > org.apache.logging.log4j.web.Log4jWebInitializerImpl.initializeNonJndi
> > (Log4jWebInitializerImpl.java:168)
> > > at
> > >
> > > org.apache.logging.log4j.web.Log4jWebInitializerImpl.start
> > (Log4jWebInitializerImpl.java:110)
> > > at
> > >
> > >
> > org.apache.logging.log4j.web.Log4jServletContainerInitializer.onStartup
> > (Log4jServletContainerInitializer.java:57)
> > > at
> > >
> > > org.apache.catalina.core.StandardContext.startInternal
> > (StandardContext.java:5245)
> > > at
> > > org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
> > > at
> > >
> > > org.apache.catalina.core.ContainerBase.addChildInternal
> > (ContainerBase.java:754)
> > > at
> > >
> org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:730)
> > > at
> > > org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
> > > at
> > >
> > >
>
> org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:629)
> > > at
> > >
> > > org.apache.catalina.startup.HostConfig$DeployDescriptor.run
> > (HostConfig.java:1839)
> > > at
> > >
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> > > at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> > > at
> > >
> > > java.util.concurrent.ThreadPoolExecutor.runWorker
> > (ThreadPoolExecutor.java:1149)
> > > at
> > >
> > > java.util.concurrent.ThreadPoolExecutor$Worker.run
> > (ThreadPoolExecutor.java:624)
> > > at java.lang.Thread.run(Thread.java:748)
> > > Caused by: java.lang.NullPointerException
> > > at org.postgresql.Driver.parseURL(Driver.java:551)
> > > at org.postgresql.Driver.acceptsURL(Driver.java:472)
> > > at java.sql.DriverManager.getDriver(DriverManager.java:299)
> > > at
> > >
> > >
> > org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createConnectionFactory
> > (BasicDataSource.java:2171)
> > > ... 26 more
> > >
> > > (Ignore below company statement)
> > >
> > >
> > >
> > > Alban Hertroys
> > > D: +31 (0)53 4 888 888 | T: +31 (0)53 4888 888 | E:
> > > alban.hertr...@apollovredestein.com
> > > Apollo Vredestein B.V.| Ir. E.L.C. Schiffstraat 370, 7547 RD Enschede,
> The
> > > Netherlands
> > > Chamber of Commerce number: 34223268
> > >
> > >
> > >
> > >
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>
>
> Alban Hertroys
> D: +31 (0)53 4 888 888 | T: +31 (0)53 4888 888 | E:
> alban.hertr...@apollovredestein.com
> Apollo Vredestein B.V.| Ir. E.L.C. Schiffstraat 370, 7547 RD Enschede, The
> Netherlands
> Chamber of Commerce number: 34223268
>
>
>
>
> The information contained in this e-mail is intended solely for the use of
> the
> individual or entity to whom it is addressed. If you are not the intended
> recipient, you are hereby notified that any disclosure, copying,
> distribution
> or action in relation to the contents of this information is strictly
> prohibited and may be unlawful and request you to delete this message and
> any
> attachments and advise the sender by return e-mail. The confidentiality of
> this
> message is not warranted. Apollo Vredestein and its subsidiaries rule out
> any
> and every liability resulting from this or any other electronic
> transmission
>
>
>
>
>
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> --
Matt Sicker <boa...@gmail.com>
