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Transcript of 1 Presentation will begin momentarily…. 2 Service Stub and Transparent Proxy: Wilma INNOVATION WE...
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Presentation will begin momentarily…
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Service Stub and Transparent Proxy: Wilma
INNOVATION WE MUST DO
AUGUST 24, 2015
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AGENDA
Test Situation1
Requirements to address the issues2
Tool: Wilma3
How it works?4
Capabilities / Features5
Future6
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THE TEST SITUATION – COMPONENT/SERVICE
Request TESTEDCOMPONENTResponse
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THE TEST SITUATION – COMPONENT/SERVICE
3rd partyComponent
TESTEDCOMPONENT
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THE TEST SITUATION – COMPONENT/SERVICE
TESTEDCOMPONENT
Request 3rd partyComponentResponse
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THE TEST SITUATION – COMPONENT/SERVICE
TESTEDCOMPONENT
Request 3rd partyComponentResponse
?
?
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3rd partyComponent
THE TEST SITUATION – COMPONENT/SERVICE
TESTEDCOMPONENT
Request
Response? missing new feature
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3rd partyComponent
THE TEST SITUATION – COMPONENT/SERVICE
TESTEDCOMPONENT
Request
Response
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THE TEST SITUATION – COMPONENT/SERVICE
TESTEDCOMPONENT
Request
Response
- No answer- Malformed answer
- invalid content-length
- invalid content-type- Errors in response
- E50x, E404, etc- Delayed answer,
Timeout
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3rd partyComponent
THE TEST SITUATION – COMPONENT/SERVICE
TESTEDCOMPONENT
Request
Response
3rd partyComponent
3rd partyComponent
3rd partyComponent
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THE TEST SITUATION – COMPONENT/SERVICE
TESTEDCOMPONENT
Request
Response
3rd partyComponent
3rd partyComponent
3rd partyComponent
3rd partyComponent
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THE TEST SITUATION – COMPONENT/SERVICE
TESTEDCOMPONENT
Request
Response
3rd partyComponent
3rd partyComponent
3rd partyComponent
3rd partyComponent
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THE TEST SITUATION – @ MICROSERVICES
TESTEDCOMPONENT
Request
Response
3rd partyComponent
3rd partyComponent
3rd partyComponent
3rd partyComponent
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REQUIREMENTS
• We must monitor the messages between the components/services• so we need a Transparent Proxy that captures the messages
• We must generate component/service responses • so we need a highly configurable Service Stub
• That means static and dynamic response contents• Any message types and contents: HTML, XML, SOAP, JSON, REST, etc
• We must handle HTTP, HTTPS requests, even 2-way SSL• We need intelligent selection between Proxying the request or generate Stub response• We need easy integration with CI environments, test-automation friendly configuration• The solution should be robust and very stable• Shall offer extensibility
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THE SOLUTIONTHE SOLUTION: WILMA
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HOW WILMA WORKS?
TESTEDCOMPONENT
Request
Response
3rd partyComponent
3rd partyComponent
3rd partyComponent
3rd partyComponent
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WILMA
HOW WILMA WORKS?
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HOW WILMA WORKS? – Information-flow Diagram
HTTP/HTTPSRequest
Wilma Marker Switch proxy
Route Engine
PROXY / STUB
WilmaWebApp
WilmaWebAppReq
UI Config / Status
Message Template Set
Message Logging Queue
HTTP/HTTPS Response
STUB Response
-FIS, -gzip
STUB Response Request Response Generator
Response
Response Queue
-FIS, -gzip +FIS, +gzip
HTTP/HTTPS Response
HTTP/HTTPSRequest
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HOW WILMA WORKS? – Transparent Proxy
HTTP/HTTPSRequest
Wilma Marker Switch proxy
Route Engine
PROXY / STUB
WilmaWebApp
WilmaWebAppReq
UI Config / Status
Message Template Set
Message Logging Queue
HTTP/HTTPS Response
STUB Response
-FIS, -gzip
STUB Response Request Response Generator
Response
Response Queue
-FIS, -gzip +FIS, +gzip
HTTP/HTTPS Response
HTTP/HTTPSRequest
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HOW WILMA WORKS? – Message Logging
HTTP/HTTPSRequest
Wilma Marker Switch proxy
Route Engine
PROXY / STUB
WilmaWebApp
WilmaWebAppReq
UI Config / Status
Message Template Set
Message Logging Queue
HTTP/HTTPS Response
STUB Response
-FIS, -gzip
STUB Response Request Response Generator
Response
Response Queue
-FIS, -gzip +FIS, +gzip
HTTP/HTTPS Response
HTTP/HTTPSRequest
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HOW WILMA WORKS? – Handling a Request as Proxy
HTTP/HTTPSRequest
Wilma Marker Switch proxy
Route Engine
PROXY / STUB
WilmaWebApp
WilmaWebAppReq
UI Config / Status
Message Template Set
Message Logging Queue
HTTP/HTTPS Response
STUB Response
-FIS, -gzip
STUB Response Request Response Generator
Response
Response Queue
-FIS, -gzip +FIS, +gzip
HTTP/HTTPS Response
HTTP/HTTPSRequest
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HOW WILMA WORKS? – Handling a Request as Stub
HTTP/HTTPSRequest
Wilma Marker Switch proxy
Route Engine
PROXY / STUB
WilmaWebApp
WilmaWebAppReq
UI Config / Status
Message Template Set
Message Logging Queue
HTTP/HTTPS Response
STUB Response
-FIS, -gzip
STUB Response Request Response Generator
Response
Response Queue
-FIS, -gzip +FIS, +gzip
HTTP/HTTPS Response
HTTP/HTTPSRequest
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HOW WILMA WORKS? – Configuring the Stub Service
• Configuration file: XML files• Request/Response pairs are defined as
• Condition Descriptors and Response Descriptors• Request – Condition Descriptors• Built-in Conditions (check header / body content)• Several conditions can be combined (and/or) and negated• External conditions can be used
• Response – Response Generation• Template files can be used (static answer)• Built-in Template Formatters can be used to alter the templates• Response can be generated (dynamic answer)• External Template Generators and Template Formatters can be used
• And so on (delay the response, malformed responses, Exxx responses…)
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HOW WILMA WORKS? – Configuring the Stub Service
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HOW WILMA WORKS? – Configuring the Stub Service
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WHERE WILMA CAN BE USED?
• Local development environment – analyse messages, stub services• CI environment – can stub surrounding services of the tested service• Integration test environment – analyse messages, stub services
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HOW WILMA CAN BE USED?
• As proxy (even if STUB mode is used only):
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HOW WILMA CAN BE USED?
• Single Wilma instance can serve many services in parallel
TESTEDCOMPONENT
Request
Response
3rd partyComponent
3rd partyComponent
3rd partyComponent
3rd partyComponent
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HOW WILMA CAN BE USED?
• Even can be used with microservices
Service A
Service BService D
Service EService H
Service C
Service I
Service G
Service F
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SHOW WILMA IN ACTION!
• Config1 + https://info.epam.com/en/news.html• Config2 + https://info.epam.com/register
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WHAT WILMA OFFERS IN ADDITION?
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OPERATION MODES
Wilma1
Exclusive PROXY2
Exclusive STUB3
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OPERATION MODE – Exclusive PROXY Mode
HTTP/HTTPSRequest
Wilma Marker Switch proxy
Route Engine
PROXY / STUB
WilmaWebApp
WilmaWebAppReq
UI Config / Status
Message Template Set
Message Logging Queue
HTTP/HTTPS Response
STUB Response
-FIS, -gzip
STUB Response Request Response Generator
Response
Response Queue
-FIS, -gzip +FIS, +gzip
HTTP/HTTPS Response
HTTP/HTTPSRequest
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OPERATION MODE – Exclusive STUB Mode
HTTP/HTTPSRequest
Wilma Marker Switch proxy
Route Engine
PROXY / STUB
WilmaWebApp
WilmaWebAppReq
UI Config / Status
Message Template Set
Message Logging Queue
HTTP/HTTPS Response
STUB Response
-FIS, -gzip
STUB Response Request Response Generator
Response
Response Queue
-FIS, -gzip +FIS, +gzip
HTTP/HTTPS Response
HTTP/HTTPSRequest
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WHAT WILMA OFFERS IN ADDITION?
• INTERCEPTORS• Both Request and Response can be intercepted• Any operation on the intercepted message can be performed• External Interceptor classes can be used
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Service A Service B
INTERCEPTOR EXAMPLE – A CIRCUIT BREAKER
• Need stub configuration – to provide response instead of B, in case B is in bad shape
• An interceptor evaluates the responses• If Service B gave bad response:
– turns on STUB for Service B– After a defined timout turns off STUB for Service B
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WHAT WILMA OFFERS IN ADDITION?
• RUN-TIME CONFIGURATION• Stub configuration• Upload and download templates, classes, jars, messages
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RUN-TIME CONFIGURATION OF WILMA VIA UI
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RUN-TIME CONFIGURATION OF WILMA VIA UI
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WHAT WILMA OFFERS IN ADDITION?
• BROWSE/SEARCH ON LOGGED MESSAGES• Via Wilma UI itself• Via Wilma Message Search Application
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MESSAGE BROWSING VIA WILMA UI
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MESSAGE BROWSING VIA WILMA MESSAGE SEARCH
• Wilma Message Search application• high performance search engine, • offers searching of the request-response pairs those were logged by Wilma• Correlation ID
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WHAT WILMA OFFERS IN ADDITION?
• API• Stub configuration• Upload and download templates, classes, jars, messages• Load information
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WILMA HTTP API
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WILMA-SERVICE-API LIBRARY
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WILMA-SERVICE-API LIBRARY
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WHAT WILMA OFFERS IN ADDITION?
• Built-in Safeguards• Maintains amount of messages saved onto disk – no run out of disk space
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WHAT WILMA OFFERS IN ADDITION?
• Built-in Safeguards• Self protecting machanisms against overload• Load information is available
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WHAT WILMA OFFERS IN ADDITION?
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WHAT WILMA OFFERS IN ADDITION?
•Open Sourced under license GNU GPL v3.0
•Available via GitHub, including documentation
•Feedbacks are welcome and as well as contribution
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FUTURE OF WILMA
• .NET API
•Service API lib enhancements
•Promotion within EPAM and
for Customers
•Depends on the OS community
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Any Questions?
Wilma is @ https://github.com/epam/Wilma
AUGUST 24, 2015