Side by Side Deployment with WLST

One of my online buddy requested me for a Side by Side(SBS) deployment using WLST

Description : A Python Script for SBS deployment.

The project is in developing stage, the client need deploying the same applications with different versions must be available for development and testing teams,

an automated handy script is requested to prepare buddy WLA. To do this interesting  task, the plan for execution is prepared as following while doing the deployment criteria:

1. If the application is New and the version is new i.e no other version is in the ACTIVE state with the given appName, the script will deploy the application

2. If one of the version of given application is in ACTIVE state visible in the console, then the developer is try to deploy the next version, the script should do DeActivate the old version and deploy the new version.

3. so now already have two versions deployed on the domain one is : ACTIVE state and other is in RETIERED State then undeploy the REITRED versioned application with a timeout or deploy the new version so that it will make current ACTIVE application to RETIERED and new deployment to ACTIVE.

For implementing the above logic in cronological way. Issue was with iterations. it was controlled by 'break' statement usually any C programmer knows it. And I have used here a flag variable 'appFlags'.

like that we are maintained 2 version max in the console of the same app.

import sys

#=========================================================== 
# Function for fresh plain deployment
#=========================================================== 
def newDeploy(appName,ver):
    print 'Deploying .........'
    deploy(appName,'/path/applications/'+appName+'/'+ver , targets='AdminServer')
    startApplication(appName)

#=========================================================== 
# Function for finding the  Application Status
#===========================================================  
def appstatus(appName, serverName):
    cd('domainRuntime:/AppRuntimeStateRuntime/AppRuntimeStateRuntime')
    #get current real state for app in specific server
    currentState = cmo.getCurrentState(appName, serverName)
    return currentState

#===========================================================  
# Undeploying the given applicaiton
# Target we can change according to domain and applicaiton deployed on
#=========================================================== 
def unDeploy(appName):
    print 'stopping and undeploying ....'
    stopApplication(appName, targets='AdminServer')
    undeploy(appName, targets='AdminServer')


#=========================================================== 
# Main program here...
# Target you can change as per the need
#===========================================================  
appName=sys.argv[1]
ver=sys.argv[2]
connect(user, passwd, adminurl)
cd('AppDeployments')
appflag=0
y=ls(returnMap='true')
for i in y :
    if i.startswith(appName )  ==1:
#Checking for the application existence)
        print i
        print appstatus(i,'AdminServer')

if appstatus(i,'AdminServer')=='STATE_RETIRED' :
    appflag=1
    break
elif appstatus(i,'AdminServer')=='STATE_ACTIVE':
    appflag=2
else:
    print ' other Applications are Running '
    pass


if appflag == 1 :
    print 'application having RETIERED STATE ..'
    unDeploy(i)
    print appstatus(i,'AdminServer')
    newDeploy(appName,ver)
    print appstatus(i,'AdminServer')
elif appflag== 2:
    print 'Application exists in ACTIVE state...'
    newDeploy(appName,ver)
    print appstatus(i,'AdminServer')
else:
    print 'new application'

How to execute this?
Dear novice WLA, you can execute this script by re-defining your connection parameters at line 36. One more thing is the application targeted to AdminServer this may vary for your environment.

prompt$ java weblogic.WLST SBSDeploy.py