Add architecture for multiple managers

using the chain of responsibility pattern.

internal/environment/aws_manager.go

@@ -0,0 +1,57 @@
+package environment
+
+import (
+	"fmt"
+	"github.com/openHPI/poseidon/internal/runner"
+	"github.com/openHPI/poseidon/pkg/dto"
+)
+
+// AWSEnvironmentManager contains no functionality at the moment.
+// IMPROVE: Create Lambda functions dynamically.
+type AWSEnvironmentManager struct {
+	*AbstractManager
+	runnerManager runner.Accessor
+}
+
+func NewAWSEnvironmentManager(runnerManager runner.Accessor) *AWSEnvironmentManager {
+	m := &AWSEnvironmentManager{&AbstractManager{nil}, runnerManager}
+	runnerManager.Load()
+	return m
+}
+
+func (a *AWSEnvironmentManager) List(fetch bool) ([]runner.ExecutionEnvironment, error) {
+	list, err := a.NextHandler().List(fetch)
+	if err != nil {
+		return nil, fmt.Errorf("aws wraped: %w", err)
+	}
+	return list, nil
+}
+
+func (a *AWSEnvironmentManager) Get(id dto.EnvironmentID, fetch bool) (runner.ExecutionEnvironment, error) {
+	e, err := a.NextHandler().Get(id, fetch)
+	if err != nil {
+		return nil, fmt.Errorf("aws wraped: %w", err)
+	}
+	return e, nil
+}
+
+func (a *AWSEnvironmentManager) CreateOrUpdate(
+	id dto.EnvironmentID, request dto.ExecutionEnvironmentRequest) (bool, error) {
+	isCreated, err := a.NextHandler().CreateOrUpdate(id, request)
+	if err != nil {
+		return false, fmt.Errorf("aws wraped: %w", err)
+	}
+	return isCreated, nil
+}
+
+func (a *AWSEnvironmentManager) Delete(id dto.EnvironmentID) (bool, error) {
+	isFound, err := a.NextHandler().Delete(id)
+	if err != nil {
+		return false, fmt.Errorf("aws wraped: %w", err)
+	}
+	return isFound, nil
+}
+
+func (a *AWSEnvironmentManager) Statistics() map[dto.EnvironmentID]*dto.StatisticalExecutionEnvironmentData {
+	return a.NextHandler().Statistics()
+}