Akila created STRATOS-1633:
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Summary: Refactoring Mock IaaS to improve performance and
concurrency issues
Key: STRATOS-1633
URL: https://issues.apache.org/jira/browse/STRATOS-1633
Project: Stratos
Issue Type: Improvement
Components: Mock IaaS
Affects Versions: 4.1.4
Reporter: Akila
Assignee: Akila
Priority: Minor
Fix For: 4.1.5
Currently there are lot of Thread.sleep calls in mock iaas component which
makes it slow and cause unexpected behavior due to concurrency issues. Also it
has a significant performance overhead when running integration tests since
mock iaas is being used for test cases. I've been working on improving this
component by doing following changes;
- Remove *all* Thread sleep calls in mock iaas
- Introduce a method named 'initialize' to start event receivers and
publishers. This is a synchronous call which grantees that receiver and
publisher objects will be created successfully. If not it will throw an
exception and startInstance() method call in CC will fail. Earlier this task
was delegated to an executor service which made it difficult to check whether
mock instance was created successfully.
- Create topology receiver in mock instance and listen for member initialized
and member started events. It will publish instance started and instance
activated events based on topology events received rather than sleeping for
some time interval before publishing.
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