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Note that by default, the library is built without line number information to save space in flash
memory. For debugging purposes, you may find it useful to build it with line number information,
which will put line number information in stack traces. To do this, do
ant library –DKEEPSYMBOLS=true
4. Deploy the new library suite to your Sun SPOTs
Use the command
ant flashlibrary
to flash the new library onto your Sun SPOTs. This command always flashes the library whose
name is defined in
.sunspot.properties
, regardless of where it is executed.
5. Build and deploy applications that use the library suite as usual
Change directory to the
addertest
folder, and deploy and run the application as usual using the
command
ant deploy run
Library manifest properties
Each library extension must contain a file named
resources/META-INF/MANIFEST.MF
within its root folder. The
adderlib
extension has such a file, whose content is
FavouriteSnake: Viper
This defines a property whose value will be available to all applications in a similar fashion to
application-specific manifest properties. The
addertest
application demonstrates this by displaying
the value of this property. The library suite is built to contain all the properties defined by the
manifests of all its input jars. For more details on accessing these properties, see the section
Manifest and resources.
Running startup code
Some library extensions require initialisation to be performed at startup (for example, to create
daemon threads). To specify startup code that must be run, add one or more lines to the manifest
properties of the library extension with the following format:
spot-startup-xxxx: my.fully.qualified.Classname
where
xxxx
is a string that is provided as the single argument to the static
main()
method of
Classname
.
Startup code is run only in the master isolate. It is run after all normal spotlib initialisation is
completed but before the OTACommandServer (if configured) is started and before the application
is launched.
Modifying the system library code
It is also possible to modify the supplied library code if you wish. To do this, you should expand
step 2 in the process outlined in the section Adding user code to the library suite as follows.