115 lines
2.8 KiB
Go
115 lines
2.8 KiB
Go
package runner
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import (
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"context"
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"encoding/json"
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"github.com/google/uuid"
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"gitlab.hpi.de/codeocean/codemoon/poseidon/api/dto"
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"gitlab.hpi.de/codeocean/codemoon/poseidon/store"
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"sync"
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)
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// ContextKey is the type for keys in a request context.
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type ContextKey string
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// ExecutionId is an id for an execution in a Runner.
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type ExecutionId string
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const (
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// runnerContextKey is the key used to store runners in context.Context
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runnerContextKey ContextKey = "runner"
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)
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type Runner interface {
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store.Entity
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// AddExecution saves the supplied ExecutionRequest for the runner and returns an ExecutionId to retrieve it again.
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AddExecution(dto.ExecutionRequest) (ExecutionId, error)
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Execution(ExecutionId) (executionRequest dto.ExecutionRequest, ok bool)
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// DeleteExecution deletes the execution of the runner with the specified id.
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DeleteExecution(ExecutionId)
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// Execute executes the execution with the given ID.
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Execute(ExecutionId)
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// Copy copies the specified files into the runner.
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Copy(dto.FileCreation)
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}
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// NomadAllocation is an abstraction to communicate with Nomad allocations.
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type NomadAllocation struct {
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sync.RWMutex
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id string
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ch chan bool
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executions map[ExecutionId]dto.ExecutionRequest
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}
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// NewRunner creates a new runner with the provided id.
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func NewRunner(id string) Runner {
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return &NomadAllocation{
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id: id,
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ch: make(chan bool),
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executions: make(map[ExecutionId]dto.ExecutionRequest),
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}
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}
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// MarshalJSON implements json.Marshaler interface.
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// This exports private attributes like the id too.
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func (r *NomadAllocation) MarshalJSON() ([]byte, error) {
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return json.Marshal(struct {
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Id string `json:"runnerId"`
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}{
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Id: r.Id(),
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})
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}
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func (r *NomadAllocation) Id() string {
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return r.id
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}
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func (r *NomadAllocation) Execution(id ExecutionId) (executionRequest dto.ExecutionRequest, ok bool) {
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r.RLock()
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defer r.RUnlock()
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executionRequest, ok = r.executions[id]
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return
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}
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func (r *NomadAllocation) AddExecution(request dto.ExecutionRequest) (ExecutionId, error) {
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r.Lock()
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defer r.Unlock()
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idUuid, err := uuid.NewRandom()
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if err != nil {
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return ExecutionId(""), err
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}
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id := ExecutionId(idUuid.String())
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r.executions[id] = request
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return id, err
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}
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func (r *NomadAllocation) Execute(id ExecutionId) {
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}
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func (r *NomadAllocation) Copy(files dto.FileCreation) {
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}
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func (r *NomadAllocation) DeleteExecution(id ExecutionId) {
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r.Lock()
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defer r.Unlock()
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delete(r.executions, id)
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}
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// NewContext creates a context containing a runner.
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func NewContext(ctx context.Context, runner Runner) context.Context {
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return context.WithValue(ctx, runnerContextKey, runner)
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}
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// FromContext returns a runner from a context.
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func FromContext(ctx context.Context) (Runner, bool) {
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runner, ok := ctx.Value(runnerContextKey).(Runner)
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return runner, ok
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}
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