A method comprising: presenting, using a user interface, a visual representation of a legacy application; identifying, from the visual representation of the legacy application, legacy application processing components and legacy application execution patterns defined by the legacy application processing components; presenting a visual representation of extender processing components that provide functionality unavailable in the legacy application; identifying, by comparing the existing functionality of the legacy application processing components with desired functionality of a target application, one or more extender processing components (1006, 1008, 1010) from the visual representation of the extender processing components (1006, 1008, 1010), wherein the one or more extender processing components (1006, 1008, 1010) provide the legacy application with the desired functionality unavailable in the legacy application to generate: the target application having the desired functionality; and extender execution patterns defined by the extender processing components (1006, 1008, 1010), by selecting the one or more extender processing components (1006, 1008, 1010) from an extender processing components repository of existing extender processing components (1006, 1008, 1010); ordering into an execution sequence the one or more selected extender processing components (1006, 1008, 1010) and the legacy application execution patterns; generating and storing, in a memory coupled to a processor, a target application processing vector that represents the ordering of the legacy application execution patterns with the extender execution patterns; executing, using the processor, the target application processing vector to perform features defined by the target execution pattern; and deploy the target application into multiple environments with one or more service request message application program interfaces (APIs) for one or more transaction servers and/or transaction managers. presenting, using a user interface, a visual representation of a legacy application; identifying, from the visual representation of the legacy application, legacy application processing components and legacy application execution patterns defined by the legacy application processing components; presenting a visual representation of extender processing components that provide functionality unavailable in the legacy application; identifying, by comparing the existing functionality of the legacy application processing components with desired functionality of a target application, one or more extender processing components (1006, 1008, 1010) from the visual representation of the extender processing components (1006, 1008, 1010), wherein the one or more extender processing components (1006, 1008, 1010) provide the legacy application with the desired functionality unavailable in the legacy application to generate: the target application having the desired functionality; and extender execution patterns defined by the extender processing components (1006, 1008, 1010), by the target application having the desired functionality; and extender execution patterns defined by the extender processing components (1006, 1008, 1010), by selecting the one or more extender processing components (1006, 1008, 1010) from an extender processing components repository of existing extender processing components (1006, 1008, 1010); ordering into an execution sequence the one or more selected extender processing components (1006, 1008, 1010) and the legacy application execution patterns; generating and storing, in a memory coupled to a processor, a target application processing vector that represents the ordering of the legacy application execution patterns with the extender execution patterns; executing, using the processor, the target application processing vector to perform features defined by the target execution pattern; and deploy the target application into multiple environments with one or more service request message application program interfaces (APIs) for one or more transaction servers and/or transaction managers.