GSAW 2007 SW Architecture Workshop - Managing the Complexity of Your Large-Scale Software Architecture and Design. Richard Anthony

Transcription

1 GSAW 2007 SW Architecture Workshop - Managing the Complexity of Your Large-Scale Software Architecture and Design Richard Anthony richard.anthony@gdc4s.com March 27, 2007

2 Introduction Target Audience for This Presentation: SW Architects at all levels on a project Stakeholders for SW Architecture and Design Government Customers, Prime Contractor, Managers, System Engineers, SW designers and implementers, Testers, Your Software Will Have an Architecture Whether you document it or not Whether you manage its definition or not SW Architect Defines the Vision for all the Architecture and Design that Occurs This Includes Architectural Viewpoints and Views (IEEE 1471) in UML Views Described Here based on Wiley book on Large-Scale Software Architecture (reference at end) While Focus is Large-Scale, Approaches Described Here also Work Well for Smaller Systems and Embedded Systems 2

3 Run-Time vs. Build-Time Architecture and Design Run-Time SW Components Run-time grouping of objects with well-defined interfaces SW Processes Look at Task Manager process tab or Unix ps command SW Deployment How does SW map to hardware processors, nodes, etc. Build Time Subsystems Collection of classes, maps directly to directory in build Classes Encapsulation of attributes and methods Keep Run-Time / Build-Time Distinction Clear in all SW Design Documents 3

4 Run-Time / Build-Time View Examples Run-Time COMPONENT PROCESS Component1 Comp1 OR Proc1 Comp2 <<component> > Component1 Node1 DEPLOYMENT Proc1 Proc2 Build-Time CLASS Class1 Attr2: String SUBSYSTEM Class1 <<subsystem>> Sub1 Class2 4

5 Hierarchical Component (Run-Time) Architecture Top-Level Component View Colors indicate CSCI mapping of Components Domain/Segment Level Comp Views CSCI-Level Comp Views 5

6 Top-Level SW Architecture Document (TLSAD) TLSAD Document Contents System Overview Top-Level Component View Component Descriptions Interface Descriptions Domain-Level Component Views Component Descriptions Interface Descriptions Other Information System-Wide Decisions / Constraints Mapping of Interfaces to Documents Owned by SW Architect for the System Under Design Interface Definitions Best Managed in a Tool or DB 6

7 Mapping (Reuse) of TLSAD Information TLSAD System Overview Top-Level Component View <<system>> <<site>> <<site>> Comp1 Comp2 SDD-1 System Overview Top-Level Component View Domain1 Comp View / Interfaces Comp3 Comp4 Comp5 Domain1 Comp View / Interfaces <<domain>> Comp3 Comp2-1 Comp1 Comp4-1 Comp4-2 Comp2-2 Comp5 SDD-2 System Overview Top-Level Component View Domain2 Comp View / Interfaces Domain1 Comp View / Interfaces 7

8 Effectively Capturing SW Architecture and Design in the SDD SDD-x (Content maps to MIL-STD-498 and DoD 2167A) 1. Overview 3. Hardware Utilization System Overview Top-Level Component View Deployment View / Process Descriptions Proc1 Node1 Proc2 Proc2 <<DB>> Data Domain1 Comp View / Interfaces 4. Detailed Design Subsystem1 Views / Descriptions Class1 2. CSCI Architecture Design Decisions Class6 Class2 Class3 Class4 Class5 CSCI Comp View / Interfaces Subsystem2 Views / Descriptions Class1 Comp3 <<CSCI>> Comp2-1 Comp1 Class4 Comp4-1 Comp4-2 Comp2-2 Comp5 Class6 Class2 Class3 Class5 8

9 Conclusions Management of SW Architecture Complexity is Critical to Success of Large-Scale SW Systems Keys to Success Run-Time vs. Build-Time Hierarchical Definition of SW Architecture TLSAD Provides Centralized Management of Component Architecture and Interfaces Consistent Approach to SW Architecture and Design Enhances Communication Within the Project and with Customers 9

10 References Large-Scale SW Architecture (Wiley) Garland/Anthony largescalesoftwarearchitecture.com Software Systems Architecture: Working With Stakeholders Using Viewpoints and Perspectives (Addison-Wesley) Rozanski / Woods Pattern-Oriented Software Architecture, Volume 1 (Wiley) Buschmann, et al. Patterns of Enterprise Application Architecture (Addison-Wesley) Martin Fowler 10