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Friday, August 4, 2017

JMS Module with ConnectionFactory and Queue configuration using WLST

After almost three and half years again revisited to the JMS module script. This time the project needs are quite different. Where WebLogic domains classified environments  but they are standalone server domains. That is only AdminServer will be there in the domain and that would be target for the module, JMS Destinations.

Lets begin the experimenting now, the prerequisites for this are:

  1. A WebLogic Domain configured with single AdminServer
  2. Server should be up and running
  3. To execute the WLST script required PATH, alias should be defined in the profile
  4. export MW_HOME=/u01/app/oracle/fmw
    export WL_HOME=$MW_HOME/wls/wlserver
    export USER_MEM_ARGS="-Djava.security.egd=file:/dev/./urandom"
    alias wlst="$MW_HOME/oracle_common/common/bin/wlst.sh -skipWLSModuleScanning"
    

    You can use this alias wlst at any directory to invoke WLST shell.  The option -skipWLSModuleScanning is easy, faster learnt while working on docker and simple way to use.

  5. Execute the configure JMS Servers
  6. WLST Script and all frequently changing values in the properties file.


#========================================
# WLST Script purpose: Configuring JMS Module
# Author: Pavan Devarakonda
# Update date: 3rd Aug 2017
#========================================
from java.util import Properties
from java.io import FileInputStream
from java.io import File
from java.io import FileOutputStream
from java import io
from java.lang import Exception
from java.lang import Throwable
import os.path
import sys

envproperty=""
if (len(sys.argv) > 1):
        envproperty=sys.argv[1]
else:
        print "Environment Property file not specified"
        sys.exit(2)

propInputStream=FileInputStream(envproperty)
configProps=Properties()
configProps.load(propInputStream)

##########################################
# Create JMS Moudle will take the 
# arguments as name, subdeployment name
# target can be on admin or managed server or cluster
##########################################
def createJMSModule(jms_module_name, adm_name, subdeployment_name):
        cd('/JMSServers')
        jmssrvlist=ls(returnMap='true')
        print jmssrvlist
        cd('/')
        module = create(jms_module_name, "JMSSystemResource")
        #cluster = getMBean("Clusters/"+cluster_target_name)
        #module.addTarget(cluster)
        #adm_name=get('AdminServerName')
        adm=getMBean("Servers/"+adm_name)
        module.addTarget(adm)
        cd('/SystemResources/'+jms_module_name)

        module.createSubDeployment(subdeployment_name)
        cd('/SystemResources/'+jms_module_name+'/SubDeployments/'+subdeployment_name)
        list=[]
        for j in jmssrvlist:
                s='com.bea:Name='+j+',Type=JMSServer'
                list.append(ObjectName(str(s)))
        set('Targets',jarray.array(list, ObjectName))


def getJMSModulePath(jms_module_name):
        jms_module_path = "/JMSSystemResources/"+jms_module_name+"/JMSResource/"+jms_module_name
        return jms_module_path

def createJMSTEMP(jms_module_name,jms_temp_name):
        jms_module_path= getJMSModulePath(jms_module_name)
        cd(jms_module_path)
        cmo.createTemplate(jms_temp_name)
        cd(jms_module_path+'/Templates/'+jms_temp_name)
        cmo.setMaximumMessageSize(20)

##########################################
# JMS Queu configuration function 
# arguments are : JMS module, 
# Queue name, jndi name
##########################################
def createJMSQ(jms_module_name,jndi,jms_queue_name):
        jms_module_path = getJMSModulePath(jms_module_name)
        cd(jms_module_path)
        cmo.createQueue(jms_queue_name)
        cd(jms_module_path+'/Queues/'+jms_queue_name)
        cmo.setJNDIName(jndi)
        cmo.setSubDeploymentName(subdeployment_name)

adminUser=configProps.get("adminUser")
adminPassword=configProps.get("adminPassword")
adminURL=configProps.get("adminURL")

connect(adminUser,adminPassword,adminURL)
#adm_name=get('AdminServerName')
adm_name=ls('Servers',returnMap='true')[0]
print adm_name
edit()
startEdit()

##########################################
#   JMS CONFIGURATION## 
##########################################
total_conf=configProps.get("total_conf")
tot_djmsm=configProps.get("total_default_jms_module")
#subdeployment_name=configProps.get("subdeployment_name")

a=1
while(a <= int(tot_djmsm)):
        i=int(a)
        jms_mod_name=configProps.get("jms_mod_name"+ str(i))
        #cluster=configProps.get("jms_mod_target"+ str(i))
        subdeployment_name=configProps.get("subdeployment_name"+ str(i))
        createJMSModule(jms_mod_name,adm_name,subdeployment_name)
        total_q=configProps.get("total_queue"+str(i))
        j=1
        while(j <= int(total_q)):
                queue_name=configProps.get("queue_name"+ str(i)+str(j))
                queue_jndi=configProps.get("queue_jndi"+ str(i)+str(j))
                createJMSQ(jms_mod_name,queue_jndi,queue_name)
                j = j + 1
        i=i+1
        a = a+1
save()
activate(block="true")
disconnect() 


Now the sample properties file:
###################################################
# JMS SUBDEPLOY CONFIGURATION
###################################################
total_subdply=2
total_default_jms_module=2
total_conf=0
subdeployment_name1=DemoJMSFAServer1
subdeployment_name2=DemoJMSFAServer2

###################################################
# JMS MODULE CONFIGURATION
###################################################
jms_mod_name1=Demo-SystemModule1
jms_mod_name2=Demo-SystemModule2

###################################################
# JMS CONNECTION FACTORY CONFIGURATION
###################################################
conf_jndi1=demoCF
conf_name1=jms/demoCF

###################################################
#   JMS QUEUE CONFIGURATION
###################################################

total_queue1=2
queue_name11=Q1
queue_jndi11=Q1

queue_name12= BQ1
queue_jndi12= BQ1


total_queue2=2
queue_name21=Q2
queue_jndi21=Q2

queue_name22= BQ2
queue_jndi22= BQ2

#========== ADMIN DETAILS =========================
adminUser=weblogic
adminPassword=welcome1
adminURL=t3://192.168.33.100:8100
output
$ wlst jms_module.py jms_module.properties

let's see what happen when you apply this logic on your project? Did you notice any errors?

How do you know everything went well? Open the WebLogic 12 administration console to check the JMS Module Configuration has successful or not.

You can also visit the Uniform Distributed Queue configuration post. Thanks for being with us in this post, Please write to us your errors and exceptions when you run this script.

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