Embed Size (px)
Citation preview
Software Design and Development Conference 2015
Mark RichardsHands-on Software ArchitectAuthor of Enterprise Messaging Video Series (O’Reilly)Author of Java Message Service 2nd Edition (O’Reilly)Co-author of Software Architecture Fundamentals Video Series (O'Reilly)
Software Architecture Patterns
Software Architecture Fundamentals Video Series Enterprise Messaging Video Series
introductionlayered architecture patternevent-driven architecture patternmicrokernel architecture patternspace-based architecture pattern
agenda
Software Architecture Pattern Analysis
module
module
module
module
module
module
module
module
module
module
module
modulemodule
module
module
module
module
module
module
module
module module
module
module
modulemodule
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
modulemodule
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
module
componentmodule
module
module
module
module
module
componentan encapsulated unit of software consisting of one or more modules that has a specific role and responsibility in the system
componentcomponent
component
component
component
component
component
component
component
?
how do components interact?does the architecture scale?how responsive is the architecture?is there a logical flow to the components?what are the deployment characteristics?how does the architecture respond to change?is the architecture extensible and if so how?how maintainable is the architecture?
how are components classified?
architecture patterns help define the basic characteristics and behavior of the
application
layered architecture
presentation layer
business layer
persistence layer
database layer
component component component
component component component
component component component
presentation layer
business layer
persistence layer
database layer
component component
component component
component component
component
component
component
layered architecture
request
layered architecture
presentation layer
business layer
persistence layer
database layer
component component component
component component component
component component component
separation of concerns
layered architecture
presentation layer component component component
business layer component component component
persistence layer component component component
database layer
layers of isolation
database layer
presentation layer component component component
persistence layer component component component
business layer component component component
persistence layer component component component
database layer
layered architecture
presentation layer
business layer
component component component
component component component
hybrids and variants
services layer component component component
persistence layer component component component
database layer
layered architecture
presentation layer
business layer
component component component
component component component
hybrids and variants
services layer component component component
persistence layer component component component
database layer
layered architecture
presentation layer component component component
business layer component component component
hybrids and variants
persistence layer component component component
presentation layer component component component
business layer component component component
com
pone
nt
com
pone
nt
layer
database layer
layered architecturehybrids and variants
persistence layer component component component
presentation layer component component component
business layer component component component
com
pone
nt
com
pone
nt
layer
com
pone
nt
com
pone
nt
layer
persistence layer component component component
presentation layer component component component
business layer component component component
layered architecture
considerations
tends to lend itself towards monolithic applications
watch out for the architecture sinkhole anti-pattern
good general purpose architecture and a good starting point for most systems
layered architecture
analysis overall agility deployment testability performance scalability development complexity loose coupling
event-driven architecture
mediator topology broker topology
event queue
event-driven architecture
mediatorevent
event channel
event channel
event channel
mediator topology
event
processorevent
module module
module module
processorevent
module module
module module
processorevent
module module
module module
processorevent
module module
module module
processorevent
module module
module module
event queue mediator
event
event channel
event channel
event channel
mediator topology
event
processorevent
module module
module module
processorevent
module module
module module
processorevent
module module
module module
processorevent
module module
module module
processorevent
module module
module module
event-driven architecture
process engine
adjustmentprocess
notificationprocess
quoteprocess
claimsprocess
customerprocess
you move...
you moved!
notify insurednotify
insured
change address
recalc quote
update claims
adjust claimschange
addressrecalc quote
update claims
adjust claims
event-driven architecture
broker topology
event processorevent
module module
module module
processorevent
module module
module module
event channel
event channel
event-driven architecture
event channel
event channel
event channel
broker topology
event processorevent
module module
module module
processorevent
module module
module module
processorevent
module module
module module
processorevent
module module
module module
processorevent
module module
module module
event-driven architecture
you move...customer process
notification process adjustment process
quote process claims process
you moved!
change address
recalc quote
update claims
change address
update claims
event-driven architecture
considerations contract creation, maintenance,
and versioning can be difficult
must address remote process availability or unresponsiveness
reconnection logic on server restart or failure must be addressed
event-driven architecture
analysis overall agility deployment testability performance scalability development complexity loose coupling
event-driven architecture
microkernel architecture
plug-in component
plug-in component
plug-in component
plug-in component
plug-in component
plug-in component
core system
(a.k.a. plug-in architecture pattern)
microkernel architecture
plug-in module
core system
architectural components
minimal functionality to run systemgeneral business rules and logicno custom processing
standalone independent modulespecific additional rules or logic
microkernel architecture
check other stuff...
check audit writes
check sql calls
check contract
standards
check header standards
check interceptors
microkernel architecture
source validation tool
read source files
validation report
claims processing
MA module
NY module
CA module
GA module
NH module
TX module
NY module
microkernel architecture
plug-in component 1
plug-in component 2
plug-in component 3
plug-in component 4
core system
registryregistry
1: <location>, <contract>2: <location>, <contract>3: <location>, <contract>4: <location>, <contract>
microkernel architecture
registrymicrokernel architecture
static { pluginRegistry.put(NAMING, "ValidatorNamingPlugin"); pluginRegistry.put(SYSOUT, "ValidatorSysoutPlugin"); pluginRegistry.put(AUDIT, "ValidatorAuditPlugin"); pluginRegistry.put(TODO, "ValidatorTodoPlugin"); pluginRegistry.put(COMMENTS, "ValidatorCommentsPlugin"); pluginRegistry.put(SVC_CALLS, null); }
registrymicrokernel architecture
private String executeChecks(String moduleName) throws Exception { for (Map.Entry<String, String> entry : pluginRegistry.entrySet()) { if (entry.getValue() != null) { Class<?> c = Class.forName(PLUGIN_PKG + entry.getValue()); Constructor<?> con = c.getConstructor(); ValidatorPlugin plugin = (ValidatorPlugin)con.newInstance(); data = plugin.execute(data); } } }
plug-in component 1
plug-in component 2
plug-in component 3
plug-in component 4
core system
plug-in contracts
std
std
std
std
microkernel architecture
microkernel architecture
plug-in contracts
public class ValidatorData { public String moduleName; //input public List<String> moduleContents; //input public String validationResults; //output}
public interface ValidatorPlugin { public ValidatorData execute(ValidatorData data);}
considerations
can be embedded or used as part of another pattern
great pattern for product-based applications
great support for evolutionary design and incremental development
microkernel architecture
analysis overall agility deployment testability performance scalability development complexity loose coupling
microkernel architecture
let's talk about scalability for a moment...
web server app server
web server
web server
web server
web server
web server
web server
app server
app server
app server
app server
space-based architecture
space-based architecture
db
processing unitprocessing unit processing unit
virtualized middleware
...
messaging grid data grid processing
griddeployment
manager
space-based architecturearchitectural components
db
processing unitprocessing unit processing unit
virtualized middlewaremessaging
grid data grid processing grid
deployment manager
processing unit
processing unit
module module module
data replication engine
in memory data
space-based architecture
middlewaremessaging
grid
data grid
processing grid
deployment manager
space-based architecture
middlewaremessaging
grid
data grid
processing grid
deployment manager
manages input request and session
space-based architecture
middlewaremessaging
grid
data grid
processing grid
deployment manager
manages data replication between processing units
space-based architecture
------------------------ ------------ ------------
middlewaremessaging
grid
data grid
processing grid
deployment manager
manages distributed request processing
space-based architecture
middlewaremessaging
grid
data grid
processing grid
deployment manager
manages dynamic processing unit deployment
space-based architecture
space-based architecture
product implementations
javaspacesgigaspacesibm object gridgemfirencacheoracle coherence
it's all about variable scalability...
good for applications that havevariable load or inconsistent peak times
not a good fit for traditional large-scale relational database systems
relatively complex and expensive pattern to implement
space-based architecture
analysis overall agility deployment testability performance scalability development complexity
space-based architecture
Independent ConsultantHands-‐on So*ware ArchitectPublished Author / Conference Speaker
Mark Richards
h<p://www.wmrichards.comh<p://www.linkedin.com/pub/mark-‐richards/0/121/5b9
Software Architecture Patterns
