Attaching shared-libs to WebSphere application's module - websphere

Question

Based on IBM documentation, I wrote a jython script that adds shared libs to an existing application.
# Application name
app = sys.argv[0]
dep = AdminConfig.getid('/Deployment:' + app + '/')
depObject = AdminConfig.showAttribute(dep, 'deployedObject')
classldr = AdminConfig.showAttribute(depObject, 'classloader')
for x in range(1, len(sys.argv)):
AdminConfig.create('LibraryRef', classldr,
[['libraryName', sys.argv[x]], ['sharedClassloader', 'true']])
AdminConfig.save()
Unfortunately, this is setting the shared library only for the application and not for the modules. How could I achieve setting the libraries for both ?
I tried to get the modules of an application but I cannot get the classloader of it.
BTW, what is the sharedClassloader attributes used for ?
Note: I know this is bad practice, but I inherited a bunch of legacy applications, so please don't advice to get rid of shared libs or to add a deployment.xml

Answer 1

Well, here is the working script addSharedLibrary.py <application-name> shared-lib [shared-lib...]
def addSharedLibrary(holder):
classldr = AdminConfig.showAttribute(holder, 'classloader')
for x in range(1, len(sys.argv)):
AdminConfig.create('LibraryRef', classldr, [['libraryName', sys.argv[x]], ['sharedClassloader', 'true']])
def handleWebModules(applicationName):
webModules = AdminConfig.list('WebModuleDeployment').split('\n')
for webModule in webModules:
if (webModule.find(applicationName) != -1):
print 'Setting for ' + webModule
addSharedLibrary(webModule)
dep = AdminConfig.getid('/Deployment:' + sys.argv[0] + '/')
addSharedLibrary(AdminConfig.showAttribute(dep, 'deployedObject'))
handleWebModules(app)
AdminConfig.save()

Answer 2

I think a good way to accomplish this is to create a shared library at the server level, and then create a classloader also on the server level in order to load the libraries.
set serv [$AdminConfig getid /Cell:mycell/Node:mynode/Server:server1/]
print AdminConfig.create('Library', serv, [['name', 'mySharedLibrary'], ['classPath',
'home/myProfile/mySharedLibraryClasspath']])
AdminConfig.create('Library', serv, [['name', 'mySharedLibrary'],
['classPath','test1.jar;test2.jar;test3.jar']])
appServer = AdminConfig.list('ApplicationServer', serv)
print appServer
classLoad = AdminConfig.showAttribute(appServer, 'classloaders')
cleanClassLoaders = classLoad[1:len(classLoad)-1]
classLoader1 = cleanClassLoaders.split(' ')[0]
classLoader1 = AdminConfig.create('Classloader', appServer, [['mode', 'PARENT_FIRST']])
print AdminConfig.create('LibraryRef', classLoader1, [['libraryName', 'MyshareLibrary']])
AdminConfig.save()
AdminNodeManagement.syncActiveNodes()

Answer 3

Thanks poussma for your jython script, it works on the previous version of WAS...
so i adjusted your code to make it work also on WAS8 :
Run the cmd line with : addSharedLibrary.py <application-name> [shared-lib...]
def addSharedLibrary(holder):
classldr = AdminConfig.showAttribute(holder, 'classloader')
for x in range(1, len(sys.argv)):
AdminConfig.create('LibraryRef', classldr, [['libraryName', sys.argv[x]], ['sharedClassloader', 'true']])
def handleWebModules(applicationName):
webModules = AdminConfig.list('WebModuleDeployment').split('\r')
webModules = map(lambda s: s.strip(), webModules)
for webModule in webModules:
if (webModule.find(applicationName+'.ear') != -1):
print 'Setting for ' + webModule
addSharedLibrary(webModule)
dep = AdminConfig.getid('/Deployment:' + sys.argv[0] + '/')
addSharedLibrary(AdminConfig.showAttribute(dep, 'deployedObject'))
handleWebModules(sys.argv[0])
AdminConfig.save()