| |||||||||||||
| |||||||||||||
Handling exceptions thrown by a Java method called from a Mosel model Description Demonstrates how a Mosel model can handle exceptions thrown by Java methods. The Java class exports a method 'readFileToString' which takes a pathname and returns its content as a Java String. The Mosel model attempts to call this method, passing it the filename of a file that does not exist. Java will throw a FileNotFoundException; the Mosel model checks for the error and outputs a message to the output stream.
You must compile the Java file before running the example - e.g. javac FileUtils.java
Source Files By clicking on a file name, a preview is opened at the bottom of this page.
handleerror.mos
(!*******************************************************
file handleerror.mos
````````````````````
a model that demonstrates handling exceptions thrown by Java code
This example requires an installation of Java, see
the manual 'mosjvm Module for Mosel' for
compatible versions and setup instructions.
The compiled FileUtils.class file must be in the current working
directory.
(c) 2016 Fair Isaac Corporation
author: J. Farmer, 2016
*******************************************************!)
model myModel
uses 'mosjvm','mmsystem'
declarations
classAndMethodName = "FileUtils.readFileToString"
fileToRead = "input.txt"
result: text
end-declarations
! Tell Java to look for classes in work directory
setparam('jvmclasspath',getparam('workdir'))
! Call into Java to read file
! (note that the given filename does not exist, so the Java class will throw a FileNotFoundException)
result := jvmcalltext( classAndMethodName, fileToRead )
if jvmstatus=false then
writeln('ERROR from Java: ',jvmgetexceptionclass,': ',jvmgetexceptionmsg)
exit(8)
else
writeln('Read data from ',fileToRead,' as follows:')
writeln(result)
end-if
end-model
| |||||||||||||
| © Copyright 2024 Fair Isaac Corporation. |
