36 lines
1.3 KiB
Text
36 lines
1.3 KiB
Text
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What todo with circular dependencies?
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a needs b
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b needs a
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- try to start them?
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status a: is_starting
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status b: not_set
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a wants b, so a service starter for b starts
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status a: is_starting, waiting for b
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status b: is_starting
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service starter for b sees that a is needed
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service starter for b sees that a is already being started
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service starter for b begins to execute b
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status a: is_starting, waiting for b
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status b: is_starting, executing "on"
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service starter b finishes
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status a: is_starting, waiting for b
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status b: FAILED | RESPAWN | ONCE
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service a continues
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b successful: execute on
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b failed: register / print that we do not start, because
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b failed
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-> this would only catch possible deadlocks, if the dependency
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tree / status check is done dynamically
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-> in case of pre-building the dep-tree this situation must
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be concerned:
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- start both a and b?
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- or stop due to circular dependency?
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- Abort on detection of a circular dependency
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* possible without pre-calculating?
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- perhaps only with direct communication possible?
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* pre calculate
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- do not start that services?
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