> User Guide > WDT Tools > Compare Model Tool

Compare Model Tool

When working with domain models, sometimes it is useful to know the differences between different models. The Compare Model Tool compares two model files and generates a model that shows the differences between them.

To use the Compare Model Tool, simply run the compareModel shell script with the correct arguments. To see the list of valid arguments, simply run the shell script with the -help option (or with no arguments) for usage information.

For example, comparing the following models.

New model

domainInfo:
    AdminUserName: weblogic
    AdminPassword: welcome2
    ServerStartMode: 'prod'
topology:
    Name: domain1
    AdminServerName: admin-server
    SecurityConfiguration:
        NodeManagerUsername : weblogic
        NodeManagerPasswordEncrypted : welcome1
    Cluster:
        cluster-1:
            DynamicServers:
                ServerTemplate:  cluster-1-template
                ServerNamePrefix: managed-server
                DynamicClusterSize: 5
                MaxDynamicClusterSize: 5
                CalculatedListenPorts: false
        cluster-2:
            DynamicServers:
                ServerTemplate:  cluster-2-template
                ServerNamePrefix: managed-server
                DynamicClusterSize: 2
                MaxDynamicClusterSize: 3
                CalculatedListenPorts: false
    Server:
        admin-server:
            ListenPort: 10011
    ServerTemplate:
        cluster-1-template:
            Cluster: cluster-1
            ListenPort : 5001
            JTAMigratableTarget:
                    StrictOwnershipCheck: true
                    Cluster: cluster-1
        cluster-2-template:
            Cluster: cluster-2
            ListenPort : 8001
            ServerStart:
                    Arguments: ['-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=6006']
            JTAMigratableTarget:
                    StrictOwnershipCheck: true
                    Cluster: cluster-2
appDeployments:
     Application:
         myear:
             SourcePath: /home/johnny/dimtemp23/sample_app_stage/wlsdeploy/applications/sample_app.ear
             Target: [cluster-2,cluster-1]
         yourear:
             SourcePath: /home/johnny/dimtemp23/sample_app_stage/wlsdeploy/applications/sample_app2.ear
             ModuleType: ear
             Target: [cluster-2,cluster-1]
resources:
    JMSServer:
        JMSServer1:
            Target: m1
        JMSServer2:
            Target: m2
    JMSSystemResource:
        MyJmsModule:
            Target: mycluster
            SubDeployment:
                JMSServer1Subdeployment:
                    Target: JMSServer1
                JMSServer2Subdeployment:
                    Target: JMSServer2
            JmsResource:
                ConnectionFactory:
                    WebAppConnectionFactory:
                        DefaultTargetingEnabled: true
                        JNDIName: jms/WebCF
                        ClientParams:
                            AllowCloseInOnMessage: true
                            MessagesMaximum: 1
                        DefaultDeliveryParams:
                            DefaultTimeToDeliver: 3
                            DefaultTimeToLive: 3600
                        FlowControlParams:
                            FlowControlEnabled: false
                        LoadBalancingParams:
                            LoadBalancingEnabled: false
                        SecurityParams:
                            AttachJMSXUserId: true
                        TransactionParams:
                            XAConnectionFactoryEnabled: true
                UniformDistributedQueue:
                    MyUniformDistributedQueue:
                        DefaultTargetingEnabled: true
                        JNDIName: jms/myUDQ

Old model

domainInfo:
    AdminUserName: weblogic
    AdminPassword: welcome2
    ServerStartMode: prod
topology:
    Name: domain1
    AdminServerName: admin-server
    SecurityConfiguration:
        NodeManagerUsername : weblogic
        NodeManagerPasswordEncrypted : welcome1
    Cluster:
        cluster-1:
            DynamicServers:
                ServerTemplate:  cluster-1-template
                ServerNamePrefix: managed-server
                DynamicClusterSize: 5
                MaxDynamicClusterSize: 5
                CalculatedListenPorts: false
    Server:
        admin-server:
            ListenPort: 10011
    ServerTemplate:
        cluster-1-template:
            Cluster: cluster-1
            ListenPort : 5001
            ServerStart:
                    Arguments: ['-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=6006']
            JTAMigratableTarget:
                    StrictOwnershipCheck: true
                    Cluster: cluster-1
appDeployments:
     Application:
         myear:
             SourcePath: /home/johnny/dimtemp23/sample_app_stage/wlsdeploy/applications/sample_app.ear
             ModuleType: ear
             Target: [cluster-1,cluster-2]
         myear2:
             SourcePath: /home/johnny/dimtemp23/sample_app_stage/wlsdeploy/applications/sample_app2.ear
             ModuleType: ear
             Target: [cluster-1,cluster-2]
resources:
    WebAppContainer:
        WAPEnabled: '@@PROP:WAPENABLED@@'
        FilterDispatchedRequestsEnabled: true
        AllowAllRoles: true
        XPoweredByHeaderLevel: NONE
        ServletAuthenticationFormURL: true
        ServletReloadCheckSecs: 1
        ChangeSessionIDOnAuthentication: true
        MimeMappingFile: wlsdeploy/config/amimemappings.properties
        AuthCookieEnabled: true
        WorkContextPropagationEnabled: true
        ReloginEnabled: true
        GzipCompression:
            GzipCompressionContentType: [ text/html, text/xml, text/plain ]
            GzipCompressionEnabled: true
    JMSServer:
        JMSServer1:
            Target: m1
        JMSServer2:
            Target: m2
    JMSSystemResource:
        MyJmsModule:
            Target: mycluster
            SubDeployment:
                JMSServer1Subdeployment:
                    Target: JMSServer1
                JMSServer2Subdeployment:
                    Target: JMSServer2
            JmsResource:
                ConnectionFactory:
                    WebAppConnectionFactory:
                        DefaultTargetingEnabled: true
                        JNDIName: jms/WebCF
                        ClientParams:
                            AllowCloseInOnMessage: true
                            MessagesMaximum: 1
                        DefaultDeliveryParams:
                            DefaultTimeToDeliver: 3
                            DefaultTimeToLive: 3600
                        FlowControlParams:
                            FlowControlEnabled: false
                        LoadBalancingParams:
                            LoadBalancingEnabled: false
                        SecurityParams:
                            AttachJMSXUserId: true
                        TransactionParams:
                            XAConnectionFactoryEnabled: true
                    MDBConnectionFactory:
                        DefaultTargetingEnabled: true
                        JNDIName: jms/mdbCF
                        TransactionParams:
                            XAConnectionFactoryEnabled: true
                UniformDistributedQueue:
                    MyUniformDistributedQueue:
                        DefaultTargetingEnabled: true
                        JNDIName: jms/myUDQ
                        ResetDeliveryCountOnForward: true

To compare the two model files, run the tool as follows:

$ weblogic-deploy\bin\compareModel.cmd -oracle_home c:\wls12213 new_model.yaml old_model.yaml

The output of the tool will look something like this:

Comparing Models: new=/tmp/model2.yaml vs old=/tmp/model1.yaml

Differences between new model and old model:

resources:
    JMSSystemResource:
        MyJmsModule:
            JmsResource:
                ConnectionFactory:
                    '!MDBConnectionFactory':
    '!WebAppContainer':
appDeployments:
    Application:
        '!myear2':
        yourear:
            SourcePath: /home/johnny/dimtemp23/sample_app_stage/wlsdeploy/applications/sample_app2.ear
            ModuleType: ear
            Target: [ cluster-2, cluster-1 ]
        myear:
            Target: [ cluster-2, cluster-1 ]
topology:
    ServerTemplate:
        cluster-1-template:
            '!ServerStart':
        cluster-2-template:
            Cluster: cluster-2
            ListenPort: 8001
            ServerStart:
                Arguments: [ '-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=6006' ]
            JTAMigratableTarget:
                StrictOwnershipCheck: True
                Cluster: cluster-2
    Cluster:
        cluster-2:
            DynamicServers:
                ServerTemplate: cluster-2-template
                ServerNamePrefix: managed-server
                DynamicClusterSize: 2
                MaxDynamicClusterSize: 3
                CalculatedListenPorts: False

Model Path: resources–>JMSSystemResource–>MyJmsModule–>JmsResource–>UniformDistributedQueue–>MyUniformDistributedQueue–>ResetDeliveryCountOnForward does not exist in new model but exists in previous model
Model Path: appDeployments–>Application–>myear–>ModuleType does not exist in new model but exists in previous model

Comparing the new and old models:

Added cluster-2 and cluster-2-template in the topology section.
Removed ServerStart of cluster-1-template in the topology section.
Deployed two applications yourear and myear in the appDeployments section.
Removed application myear in the appDeployments section.
Removed MDBConnectionFactory from the MyJmsModule JMS Module in the resource section.
Removed WebAppContainer in the resource section.
Removed the attribute ResetDeliveryCountOnForward from MyUniformDistributedQueue.
Changed deployment targets for application myear.
Removed the attribute ‘ModuleType’ for application myear.

The ! is a notation for the deletion of a non-attribute key element from the model. Missing attributes will be omitted from the resulting model, but shown as messages in the output. If the attribute value is a list, even if all the individual items within the list are identical but the ordering is different, the attribute is counted as different.

To compare the two model files and generate the output to files, run the tool as follows:

$ weblogic-deploy\bin\compareModel.cmd -oracle_home c:\wls12213 -output_dir c:\cm-output new_model.yaml old_model.yaml

The following files will be written to the directory:

diffed_model.json
diffed_model.yaml
compare_model_stdout

Environment variables

The following environment variables may be set.

JAVA_HOME The location of the JDK. This must be a valid Java 7 or later JDK.
WLSDEPLOY_PROPERTIES System properties that will be passed to Java.

Since the Compare Model Tool uses Jython directly without using WLST, the JAVA_HOME will be the JDK used to execute the command (unlike other tools that use WLST).

Parameter table for `compareModel`

Parameter	Definition	Default
`-oracle_home`	Home directory of the Oracle installation. Required if the `ORACLE_HOME` environment variable is not set.
`-output_dir`	(Required) Directory in which to store the output.
`-variable_file`	Variable file used for token substitution.

Compare Model Tool

New model

Old model

Environment variables

Parameter table for compareModel

Parameter table for `compareModel`