Logging and error handling

BladeSmith adds logging and error handling code throughout the generated source code.

You can add additional logging calls by using the Log() method from the IfmxLog class. The Log() method calls the standard Java™ I/O package methods system.out.println() and system.err.println(). For more information about these methods, see the HCL OneDB™ JDBC Driver Programmer's Guide.

If the Java value object is used on the client, the Log() method writes the logging messages to the standard output. If the Java value object is used on the server, the Log() method writes the logging messages to the Java log file.

The Java log file is distinct from the main database server log file, online.log. The Java log file contains all logging and tracing messages specific to Java methods.

The Java log file is specified by the JVPLOGFILE configuration parameter, which is set in the onconfig file. By default, the Java log file is at the following location:
/usr/informix/jvp.log

You can change the location of the Java log file by setting the JVPLOGFILE configuration parameter; see HCL® J/Foundation Developer's Guide.