added poseidon with aws to k8s changes

internal/environment/abstract_manager.go

@@ -0,0 +1,77 @@
+package environment
+
+import (
+	"context"
+	"fmt"
+	"github.com/openHPI/poseidon/internal/runner"
+	"github.com/openHPI/poseidon/pkg/dto"
+)
+
+// AbstractManager is used to have a fallback environment manager in the chain of responsibility
+// following the null object pattern.
+type AbstractManager struct {
+	nextHandler   ManagerHandler
+	runnerManager runner.Manager
+}
+
+func (n *AbstractManager) SetNextHandler(next ManagerHandler) {
+	n.nextHandler = next
+}
+
+func (n *AbstractManager) NextHandler() ManagerHandler {
+	if n.HasNextHandler() {
+		return n.nextHandler
+	} else {
+		return &AbstractManager{}
+	}
+}
+
+func (n *AbstractManager) HasNextHandler() bool {
+	return n.nextHandler != nil
+}
+
+func (n *AbstractManager) List(_ bool) ([]runner.ExecutionEnvironment, error) {
+	return []runner.ExecutionEnvironment{}, nil
+}
+
+func (n *AbstractManager) Get(_ dto.EnvironmentID, _ bool) (runner.ExecutionEnvironment, error) {
+	return nil, runner.ErrRunnerNotFound
+}
+
+func (n *AbstractManager) CreateOrUpdate(_ dto.EnvironmentID, _ dto.ExecutionEnvironmentRequest, _ context.Context) (
+	bool, error) {
+	return false, nil
+}
+
+func (n *AbstractManager) Delete(id dto.EnvironmentID) (bool, error) {
+	if n.runnerManager == nil {
+		return false, nil
+	}
+
+	e, ok := n.runnerManager.GetEnvironment(id)
+	if !ok {
+		isFound, err := n.NextHandler().Delete(id)
+		if err != nil {
+			return false, fmt.Errorf("abstract wrapped: %w", err)
+		}
+		return isFound, nil
+	}
+
+	n.runnerManager.DeleteEnvironment(id)
+	if err := e.Delete(runner.ErrDestroyedByAPIRequest); err != nil {
+		return true, fmt.Errorf("could not delete environment: %w", err)
+	}
+	return true, nil
+}
+
+func (n *AbstractManager) Statistics() map[dto.EnvironmentID]*dto.StatisticalExecutionEnvironmentData {
+	if n.runnerManager == nil {
+		return map[dto.EnvironmentID]*dto.StatisticalExecutionEnvironmentData{}
+	}
+
+	statistics := n.NextHandler().Statistics()
+	for k, v := range n.runnerManager.EnvironmentStatistics() {
+		statistics[k] = v
+	}
+	return statistics
+}