unable to build and deploy socket transport for Oracle Service bus in weblogic?

Question

I am following the link https://docs.oracle.com/cd/E23943_01/dev.1111/e15866/example.htm#OSBDV1445 to build and deploy socket transport. The Issue is that when I am going to run command ant deploy it is giving following error
Buildfile: build.xml BUILD FAILED /u01/app/oracle/fmw/Oracle_OSB1/samples/servicebus/sample-transport/build.xml:7: taskdef class weblogic.ant.taskdefs.management.WLDeploy cannot be found

kindly help.

Thanks.