Microservices: software that fits in your head

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Microservices: software that fits in your head Dan North @tastapod

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What is the point of software development?

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What is the purpose of software development?

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business impact create What is the purpose of software development?

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business impact create positive What is the purpose of software development?

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What is the goal of software development?

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What is the goal of software development? to business impact minimise lead time

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What is the goal of software development? to business impact minimise lead time sustainably

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The goal is not to produce software!

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produce

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produce production

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produce production productive

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≠ effective productive

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Code is not the asset…

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Code is not the asset… Code is the cost!

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Code is not the asset… Code is the cost! - writing code costs 

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Code is not the asset… Code is the cost! - writing code costs  - waiting for code costs 

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Code is not the asset… Code is the cost! - writing code costs  - waiting for code costs  - changing code costs 

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Code is not the asset… Code is the cost! - writing code costs  - waiting for code costs  - changing code costs  - understanding code costs

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understanding code

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understanding code code I know

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understanding code code I know code everyone knows

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understanding code code I know code everyone knows code no-one knows!

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Code should be stabilised or killed off

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Code should be stabilised or killed off fast!

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Two complementary patterns

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Two complementary patterns Short Software Half-Life

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Two complementary patterns Short Software Half-Life Fits In My Head

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Short Software Half-Life

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Short Software Half-Life Design considerations

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Short Software Half-Life - write discrete components  Design considerations

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Short Software Half-Life - write discrete components  - define component boundary  Design considerations

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Short Software Half-Life - write discrete components  - define component boundary  - define component purpose  Design considerations

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Short Software Half-Life - write discrete components  - define component boundary  - define component purpose  - define component responsibility Design considerations

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Short Software Half-Life Stewardship considerations

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Short Software Half-Life - write component tests and docs  Stewardship considerations

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Short Software Half-Life - write component tests and docs  - optimise for replaceability  Stewardship considerations

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Short Software Half-Life - write component tests and docs  - optimise for replaceability  - expect to invest in stabilising  Stewardship considerations

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Short Software Half-Life - write component tests and docs  - optimise for replaceability  - expect to invest in stabilising  - build a stable team Stewardship considerations

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Fits In My Head

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Fits In My Head - multiple dimensions

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Fits In My Head - multiple dimensions - multiple scales

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Fits In My Head - multiple dimensions - multiple scales - “What would James do?”

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Fits In My Head - multiple dimensions - multiple scales - “What would James do?” Contextual Consistency

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Fits In My Head - multiple dimensions - multiple scales - “What would James do?” Contextual Consistency - agree guiding principles

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Fits In My Head - multiple dimensions - multiple scales - “What would James do?” Contextual Consistency - agree guiding principles - agree idioms

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Fits In My Head - multiple dimensions - multiple scales - “What would James do?” Contextual Consistency - agree guiding principles - agree idioms - difference is data

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Fits In My Head - multiple dimensions - multiple scales - “What would James do?” Contextual Consistency - agree guiding principles - agree idioms - difference is data - familiarity ≠ simplicity

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