Category Archives: Tips

13/Jun/2018

Redirect Tomcat console messages to file

By Gabriel

Despite the fact that offical Tomcat’s Wiki says:

System.out and System.err are both redirected to CATALINA_BASE/logs/catalina.out when using Tomcat’s startup scripts (bin/startup.sh/.bat or bin/catalina.sh/.bat). Any code that writes to System.out or System.err will end up writing to that file. (link)

For some reason that scape from my understanding, this is not 100% true. Many dirty System.out don’t go to catalina file, been readable only from console.

So, the solution to guarantee that all console messages became available in a file (usually for troubleshooting purposes) is:

  1. Locate the file startup.sh or startup.bat
  2. Look into for call “%EXECUTABLE%” start %CMD_LINE_ARGS%
  3. Replace the command above for call “%EXECUTABLE%” run >..\logs\console.log 2>&1 start %CMD_LINE_ARGS% run >..\logs\console.log 2>&1

 

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13/Dec/2017

Spring Framework marks transaction to rollback when everything is fine

By Gabriel

Eventually, you can’t conclude the whole process flux because, at the end, the Spring Framework marks the transaction to rollback, even when all exceptions were caught.

The evidence of this scenario is this following message Transaction was marked for rollback only; cannot commit. The exception thrown is org.springframework.orm.jpa.JpaSystemException.

It happens because in some point of all code processed, your flow had an exception unchecked. The simplest solution is to use checked exceptions and avoid use NoResultException unless it is really necessary.

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30/Oct/2017

Generating client for SOAP using CXF

By Gabriel

What is needed

  • WSDL file describing the services
  • Apache CXF (3.1+)
  • JDK (1.7+)

Straight to point

In order to create the set of Client’s classes, verify for the following environment variables:

  • JAVA_HOME: Path to JDK location, eg. C:\Progra~1\Java\jdk1.7.0_80
  • CXF_HOME: Path to CXF location, eg. C:\Java\apache-cxf-3.1.13

Now, open a command prompt and execute the command: wsdl2java.bat -p net.itfromhell.itsatrap.serviceclient -d C:\Temp\TestClient -all -ant -exsh false -dns true -dex true -encoding UTF-8 -verbose Test.wsdl

Where…

  • wsdl2java.bat: Tool to generate encapsulated service’s client from WSDL document
  • net.itfromhell.itsatrap.serviceclient: Package of generated classes
  • C:\Temp\TestClient: Output directory to generated classes
  • Test.wsdl: WSDL file

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20/Jun/2014

PWC6345: There is an error in invoking javac.

By Gabriel

Accessing your application in GlassFish you get this error message:

org.apache.jasper.JasperException: PWC6345: There is an error in invoking javac. A full JDK (not just JRE) is required

Try to verify the parameter AS_JAVA inside of file glassfish\config\asenv.bat(.conf). This parameter should be the JDK path.

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20/Jun/2014

Get access to DAS for other Domain than default using shell

By Gabriel

Need to access your GlassFish as administrator but in other Domain than default. Use the tool asadmin, to do that you need to specify the port of DAS to this specific Domain:

asadmin --host localhost --port 4848 enable-secure-admin

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15/Jun/2014

Error setting expression ‘X.Y’ with value ‘[Ljava.lang.String;@6791525e’

By Gabriel

If you get this error message:

[OgnlValueStack]: CommonsLogger.warn{60} Error setting expression ‘X.Y’ with value ‘[Ljava.lang.String;@6791525e’

Try changing the order of setter method is implemented, move to first sequence the method with String as a parameter.

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