Context & catalog isolation — ExecContext gains Backend, handlers decoupled from mpr

mdl/backend/java.go

@@ -11,6 +11,7 @@ import (
 // JavaBackend provides Java and JavaScript action operations.
 type JavaBackend interface {
 	ListJavaActions() ([]*mpr.JavaAction, error)
+	ListJavaActionsFull() ([]*javaactions.JavaAction, error)
 	ListJavaScriptActions() ([]*mpr.JavaScriptAction, error)
 	ReadJavaActionByName(qualifiedName string) (*javaactions.JavaAction, error)
 	ReadJavaScriptActionByName(qualifiedName string) (*mpr.JavaScriptAction, error)

mdl/backend/mock/backend.go

@@ -203,6 +203,7 @@ type MockBackend struct {
 
 	// JavaBackend
 	ListJavaActionsFunc            func() ([]*mpr.JavaAction, error)
+	ListJavaActionsFullFunc        func() ([]*javaactions.JavaAction, error)
 	ListJavaScriptActionsFunc      func() ([]*mpr.JavaScriptAction, error)
 	ReadJavaActionByNameFunc       func(qualifiedName string) (*javaactions.JavaAction, error)
 	ReadJavaScriptActionByNameFunc func(qualifiedName string) (*mpr.JavaScriptAction, error)

mdl/backend/mock/mock_java.go

@@ -15,6 +15,13 @@ func (m *MockBackend) ListJavaActions() ([]*mpr.JavaAction, error) {
 	return nil, nil
 }
 
+func (m *MockBackend) ListJavaActionsFull() ([]*javaactions.JavaAction, error) {
+	if m.ListJavaActionsFullFunc != nil {
+		return m.ListJavaActionsFullFunc()
+	}
+	return nil, nil
+}
+
 func (m *MockBackend) ListJavaScriptActions() ([]*mpr.JavaScriptAction, error) {
 	if m.ListJavaScriptActionsFunc != nil {
 		return m.ListJavaScriptActionsFunc()

mdl/backend/mpr/backend.go

@@ -34,6 +34,18 @@ type MprBackend struct {
 	path   string
 }
 
+// Wrap creates an MprBackend that wraps an existing Writer (and its Reader).
+// This is used during migration when the Executor already owns the Writer
+// and we want to expose it through the Backend interface without opening
+// a second connection.
+func Wrap(writer *mpr.Writer, path string) *MprBackend {
+	return &MprBackend{
+		reader: writer.Reader(),
+		writer: writer,
+		path:   path,
+	}
+}
+
 // ---------------------------------------------------------------------------
 // ConnectionBackend
 // ---------------------------------------------------------------------------
@@ -526,6 +538,9 @@ func (b *MprBackend) DeleteJsonStructure(id string) error {
 func (b *MprBackend) ListJavaActions() ([]*mpr.JavaAction, error) {
 	return b.reader.ListJavaActions()
 }
+func (b *MprBackend) ListJavaActionsFull() ([]*javaactions.JavaAction, error) {
+	return b.reader.ListJavaActionsFull()
+}
 func (b *MprBackend) ListJavaScriptActions() ([]*mpr.JavaScriptAction, error) {
 	return b.reader.ListJavaScriptActions()
 }

mdl/catalog/builder.go

@@ -10,19 +10,72 @@ import (
 
 	"github.com/mendixlabs/mxcli/model"
 	"github.com/mendixlabs/mxcli/sdk/domainmodel"
+	"github.com/mendixlabs/mxcli/sdk/javaactions"
 	"github.com/mendixlabs/mxcli/sdk/microflows"
 	"github.com/mendixlabs/mxcli/sdk/mpr"
 	"github.com/mendixlabs/mxcli/sdk/pages"
+	"github.com/mendixlabs/mxcli/sdk/security"
 	"github.com/mendixlabs/mxcli/sdk/workflows"
 )
 
+// CatalogReader defines the read-only backend surface used by the catalog builder.
+// Both *mpr.Reader and backend.FullBackend satisfy this interface.
+type CatalogReader interface {
+	// Infrastructure
+	GetRawUnit(id model.ID) (map[string]any, error)
+	ListRawUnitsByType(typePrefix string) ([]*mpr.RawUnit, error)
+	ListUnits() ([]*mpr.UnitInfo, error)
+	ListFolders() ([]*mpr.FolderInfo, error)
+
+	// Modules
+	ListModules() ([]*model.Module, error)
+
+	// Settings & security
+	GetProjectSettings() (*model.ProjectSettings, error)
+	GetProjectSecurity() (*security.ProjectSecurity, error)
+	GetNavigation() (*mpr.NavigationDocument, error)
+
+	// Domain models & enumerations
+	ListDomainModels() ([]*domainmodel.DomainModel, error)
+	ListEnumerations() ([]*model.Enumeration, error)
+	ListConstants() ([]*model.Constant, error)
+
+	// Microflows & nanoflows
+	ListMicroflows() ([]*microflows.Microflow, error)
+	ListNanoflows() ([]*microflows.Nanoflow, error)
+
+	// Pages, layouts & snippets
+	ListPages() ([]*pages.Page, error)
+	ListLayouts() ([]*pages.Layout, error)
+	ListSnippets() ([]*pages.Snippet, error)
+
+	// Workflows
+	ListWorkflows() ([]*workflows.Workflow, error)
+
+	// Java actions
+	ListJavaActionsFull() ([]*javaactions.JavaAction, error)
+
+	// Services
+	ListConsumedODataServices() ([]*model.ConsumedODataService, error)
+	ListPublishedODataServices() ([]*model.PublishedODataService, error)
+	ListConsumedRestServices() ([]*model.ConsumedRestService, error)
+	ListPublishedRestServices() ([]*model.PublishedRestService, error)
+	ListBusinessEventServices() ([]*model.BusinessEventService, error)
+	ListDatabaseConnections() ([]*model.DatabaseConnection, error)
+
+	// Mappings & JSON structures
+	ListImportMappings() ([]*model.ImportMapping, error)
+	ListExportMappings() ([]*model.ExportMapping, error)
+	ListJsonStructures() ([]*mpr.JsonStructure, error)
+}
+
 // DescribeFunc generates MDL source for a given object type and qualified name.
 type DescribeFunc func(objectType string, qualifiedName string) (string, error)
 
 // Builder populates catalog tables from MPR data.
 type Builder struct {
 	catalog      *Catalog
-	reader       *mpr.Reader
+	reader       CatalogReader
 	snapshot     *Snapshot
 	progress     ProgressFunc
 	hierarchy    *hierarchy
@@ -148,7 +201,7 @@ func (h *hierarchy) buildFolderPath(containerID model.ID) string {
 }
 
 // NewBuilder creates a new catalog builder.
-func NewBuilder(catalog *Catalog, reader *mpr.Reader) *Builder {
+func NewBuilder(catalog *Catalog, reader CatalogReader) *Builder {
 	return &Builder{
 		catalog: catalog,
 		reader:  reader,