MCP Toolbox for Databases

// Copyright 2025 Google LLC // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package serverlesssparkcancelbatch import ( "context" "fmt" "strings" longrunning "cloud.google.com/go/longrunning/autogen" "cloud.google.com/go/longrunning/autogen/longrunningpb" "github.com/goccy/go-yaml" "github.com/googleapis/genai-toolbox/internal/sources" "github.com/googleapis/genai-toolbox/internal/tools" "github.com/googleapis/genai-toolbox/internal/util/parameters" ) const kind = "serverless-spark-cancel-batch" func init() { if !tools.Register(kind, newConfig) { panic(fmt.Sprintf("tool kind %q already registered", kind)) } } func newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (tools.ToolConfig, error) { actual := Config{Name: name} if err := decoder.DecodeContext(ctx, &actual); err != nil { return nil, err } return actual, nil } type compatibleSource interface { GetOperationsClient(context.Context) (*longrunning.OperationsClient, error) GetProject() string GetLocation() string } type Config struct { Name string `yaml:"name" validate:"required"` Kind string `yaml:"kind" validate:"required"` Source string `yaml:"source" validate:"required"` Description string `yaml:"description"` AuthRequired []string `yaml:"authRequired"` } // validate interface var _ tools.ToolConfig = Config{} // ToolConfigKind returns the unique name for this tool. func (cfg Config) ToolConfigKind() string { return kind } // Initialize creates a new Tool instance. func (cfg Config) Initialize(srcs map[string]sources.Source) (tools.Tool, error) { desc := cfg.Description if desc == "" { desc = "Cancels a running Serverless Spark (aka Dataproc Serverless) batch operation. Note that the batch state will not change immediately after the tool returns; it can take a minute or so for the cancellation to be reflected." } allParameters := parameters.Parameters{ parameters.NewStringParameter("operation", "The name of the operation to cancel, e.g. for \"projects/my-project/locations/us-central1/operations/my-operation\", pass \"my-operation\""), } inputSchema, _ := allParameters.McpManifest() mcpManifest := tools.McpManifest{ Name: cfg.Name, Description: desc, InputSchema: inputSchema, } return &Tool{ Config: cfg, manifest: tools.Manifest{Description: desc, Parameters: allParameters.Manifest()}, mcpManifest: mcpManifest, Parameters: allParameters, }, nil } // Tool is the implementation of the tool. type Tool struct { Config manifest tools.Manifest mcpManifest tools.McpManifest Parameters parameters.Parameters } // Invoke executes the tool's operation. func (t *Tool) Invoke(ctx context.Context, resourceMgr tools.SourceProvider, params parameters.ParamValues, accessToken tools.AccessToken) (any, error) { source, err := tools.GetCompatibleSource[compatibleSource](resourceMgr, t.Source, t.Name, t.Kind) if err != nil { return nil, err } client, err := source.GetOperationsClient(ctx) if err != nil { return nil, fmt.Errorf("failed to get operations client: %w", err) } paramMap := params.AsMap() operation, ok := paramMap["operation"].(string) if !ok { return nil, fmt.Errorf("missing required parameter: operation") } if strings.Contains(operation, "/") { return nil, fmt.Errorf("operation must be a short operation name without '/': %s", operation) } req := &longrunningpb.CancelOperationRequest{ Name: fmt.Sprintf("projects/%s/locations/%s/operations/%s", source.GetProject(), source.GetLocation(), operation), } err = client.CancelOperation(ctx, req) if err != nil { return nil, fmt.Errorf("failed to cancel operation: %w", err) } return fmt.Sprintf("Cancelled [%s].", operation), nil } func (t *Tool) ParseParams(data map[string]any, claims map[string]map[string]any) (parameters.ParamValues, error) { return parameters.ParseParams(t.Parameters, data, claims) } func (t *Tool) Manifest() tools.Manifest { return t.manifest } func (t *Tool) McpManifest() tools.McpManifest { return t.mcpManifest } func (t *Tool) Authorized(services []string) bool { return tools.IsAuthorized(t.AuthRequired, services) } func (t *Tool) RequiresClientAuthorization(resourceMgr tools.SourceProvider) (bool, error) { // Client OAuth not supported, rely on ADCs. return false, nil } func (t *Tool) ToConfig() tools.ToolConfig { return t.Config } func (t Tool) GetAuthTokenHeaderName(resourceMgr tools.SourceProvider) (string, error) { return "Authorization", nil }