6b69a2d732
from an approach that loaded the runners only once at the startup to a method that will be repeated i.e. if the Nomad Event Stream connection interrupts.
55 lines
2.2 KiB
Go
55 lines
2.2 KiB
Go
package runner
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import "github.com/openHPI/poseidon/pkg/dto"
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// Manager keeps track of the used and unused runners of all execution environments in order to provide unused
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// runners to new clients and ensure no runner is used twice.
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type Manager interface {
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EnvironmentAccessor
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AccessorHandler
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}
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// EnvironmentAccessor provides access to the stored environments.
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type EnvironmentAccessor interface {
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// ListEnvironments returns all execution environments known by Poseidon.
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ListEnvironments() []ExecutionEnvironment
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// GetEnvironment returns the details of the requested environment.
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// Iff the requested environment is not stored it returns false.
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GetEnvironment(id dto.EnvironmentID) (ExecutionEnvironment, bool)
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// StoreEnvironment stores the environment in Poseidons memory.
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StoreEnvironment(environment ExecutionEnvironment)
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// DeleteEnvironment removes the specified execution environment in Poseidons memory.
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// It does nothing if the specified environment can not be found.
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DeleteEnvironment(id dto.EnvironmentID)
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// EnvironmentStatistics returns statistical data for each execution environment.
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EnvironmentStatistics() map[dto.EnvironmentID]*dto.StatisticalExecutionEnvironmentData
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}
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// AccessorHandler is one handler in the chain of responsibility of runner accessors.
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// Each runner accessor can handle different requests.
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type AccessorHandler interface {
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Accessor
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SetNextHandler(m AccessorHandler)
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NextHandler() AccessorHandler
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HasNextHandler() bool
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}
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// Accessor manages the lifecycle of Runner.
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type Accessor interface {
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// Claim returns a new runner. The runner is deleted after duration seconds if duration is not 0.
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// It makes sure that the runner is not in use yet and returns an error if no runner could be provided.
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Claim(id dto.EnvironmentID, duration int) (Runner, error)
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// Get returns the used runner with the given runnerId.
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// If no runner with the given runnerId is currently used, it returns an error.
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Get(runnerID string) (Runner, error)
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// Return signals that the runner is no longer used by the caller and can be claimed by someone else.
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// The runner is deleted or cleaned up for reuse depending on the used executor.
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Return(r Runner) error
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}
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