WAS v8.5 > Reference > Sets

Composition unit settings page

Use this page to view composition unit settings and to change the configuration properties of a composition unit. The specific settings available for configuration can vary, depending upon the contents of the composition unit. For example, there are additional configuration settings if the asset contained in the composition unit is an SCA composite, or an OSGi application.

To view this dmgr console page, click Applications > Application Types > Business-level applications > application_name > deployed_asset_name. The deployed asset is a composition unit of the business-level application.


Sets that are common to all composition units


Name

Logical name for the composition unit. We cannot change the name on this page.


Description

Description for the composition unit.


Backing ID

Unique identifier for a composition unit that is registered in the application management domain.

The identifier has the format WebSphere:unit_typename=unit_name. For example, for the MyApp.jar asset, the backing identifier might be WebSphere:assetname=MyApp.jar.

We cannot change the identifier on this page.
Information Value
Data type String
Units Configuration unit identifier


Start weight

Order in which composition units are started when the server starts. The starting weight is like the startup order. The composition unit with the lowest starting weight is started first.

The value set for Starting weight determines the importance or weight of a composition unit within the business level application. For example, for the most important composition unit within a business-level application, specify 1 for Starting weight. For the next most important composition unit within the business-level application, specify 2 for Starting weight, and so on.

Assign composition units upon which other composition units depend a lower starting weight than the dependent composition units. If a composition unit is not started and running before its dependent composition units, java.lang.ClassNotFoundException errors might result when we attempt to start the application or its modules.
Information Value
Data type Integer
Default 1
Range 0 to 2147483647


Start on distribution

Whether to start the composition unit when the product distributes the composition unit to other locations.

The default is not to start the composition unit.

This setting applies to asset or shared library composition units. This setting does not apply when the composition unit is a business-level application.
Information Value
Data type Boolean
Default false


Recycle behavior on update

Whether the product restarts the composition unit after the composition unit is updated.

The default is to restart the composition unit after partial updating of the composition unit.

This setting applies to asset or shared library composition units. This setting does not apply when the composition unit is a business-level application.

Option descriptions. Whether to restart an asset or shared library composition unit.

Option Description
ALL Restarts the composition unit after the entire composition unit is updated
DEFAULT Restarts the composition unit after the part of the composition unit is updated
NONE Does not restart the composition unit after the composition unit is updated


Target mapping

Current targets for the composition unit.

To change the deployment targets, click Modify targets then select a different set of deployment targets from the list of available clusters and servers.

For SCA, specify only a single server or cluster as the target. Do not map an SCA composition unit to multiple servers or clusters.

When you change the deployment target of composition units in a business-level application, the startup order changes to the same order in which you remap composition unit targets, even if the starting weight for all composition units is set to 1. To avoid java.lang.ClassNotFoundException errors when attempting to start the remapped composition units, remap targets for composition units in the same order as that used to add the composition units or, after remapping, check starting weights to ensure that composition units upon which other composition units depend are started first.


Additional composition unit settings for SCA composites


SCA composite components

Component names and component implementations of SCA composites in the application.

Column descriptions. Provides the name of each component and the name of the class or code implementing the component.

Column Description
Component Name Name of a component associated with the SCA composite.
Component Implementation Name of the class or code implementing the component.

None indicates the SCA composite does not have defined components.


SCA composite properties

Names and values of SCA composite properties in the application.

Column descriptions. Provides the name and value of SCA composite properties.

Column Description
Property Name Name of an SCA composite property.
Property Value Value of the property.

None indicates the SCA composite does not have defined name-value properties.


SCA composite wires

Sources and targets of wires in the SCA composite.

Column descriptions. Provides the source and target of wires.

Column Description
Wire Source Source of a wire in the SCA composite.
Wire Target Target of the wire.

None indicates the SCA composite does not have defined wires.


Additional composition unit settings for OSGi applications


OSGi application deployment status

The deployment status shows whether updates are available for the EBA asset contained in the composition unit. If a new version of an EBA asset is available, and all bundle downloads for the asset are complete, we can update the EBA composition unit so the business-level application uses the latest configuration. We do not have to update the composition unit every time you update the asset.

There are four distinct deployment statuses for an EBA composition unit:

Use latest OSGi application deployment.

The composition unit is running the latest configuration of the backing asset and any CBA extensions.

New OSGi application deployment not yet available because it requires bundles that are still downloading.

The backing asset is currently undergoing a bundle version update, or bundles are downloading for a CBA extension.

New OSGi application deployment available.

The backing asset is available at a newer configuration than the configuration that is currently running in this composition unit, or a CBA extension has been added or replaced.

New OSGi application deployment cannot be applied because bundle downloads have failed.

The last bundle version update for the backing asset or CBA extension did not succeed, and therefore the newer configuration is not yet available.

If the status is "New OSGi application deployment available", the Update to latest deployment ... button is available. Click this button to bring the EBA composition unit up-to-date and run the updated business-level application. If any of the updates need configuration changes, a wizard prompts you to update the configuration information.

When you save the changes to the EBA composition unit, the associated business-level application is updated to use the new configuration. If the business-level application is running, the bundle and configuration updates are applied immediately. If possible (that is, depending on the nature of the updates) the system applies the updates without restarting the application. Updates that pull in new use bundles at run time prompt a full restart of the application. Updates that pull in new provision bundles might also prompt a full application restart.


Related concepts:

Business-level applications


Related


Create business-level applications
View SCA composite definitions
View SCA domain information
Export WSDL and XSD documents


Reference:

Business-level application page
Map target settings
Provide HTTP endpoint URL information settings for SCA composites
Relationship options settings
Map security roles to users or groups collection for SCA composites
Map RunAs roles to users collection for SCA composites


Related information:

Checking the update status of an EBA composition unit
Modify the configuration of an EBA composition unit
Update bundle versions for an EBA composition unit


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