| // Copyright (C) MongoDB, Inc. 2017-present. |
| // |
| // 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 |
| |
| package driver |
| |
| import ( |
| "context" |
| |
| "time" |
| |
| "github.com/mongodb/mongo-go-driver/mongo/options" |
| "github.com/mongodb/mongo-go-driver/x/bsonx" |
| "github.com/mongodb/mongo-go-driver/x/bsonx/bsoncore" |
| "github.com/mongodb/mongo-go-driver/x/mongo/driver/session" |
| "github.com/mongodb/mongo-go-driver/x/mongo/driver/topology" |
| "github.com/mongodb/mongo-go-driver/x/mongo/driver/uuid" |
| "github.com/mongodb/mongo-go-driver/x/network/command" |
| "github.com/mongodb/mongo-go-driver/x/network/connection" |
| "github.com/mongodb/mongo-go-driver/x/network/description" |
| ) |
| |
| // ListIndexes handles the full cycle dispatch and execution of a listIndexes command against the provided |
| // topology. |
| func ListIndexes( |
| ctx context.Context, |
| cmd command.ListIndexes, |
| topo *topology.Topology, |
| selector description.ServerSelector, |
| clientID uuid.UUID, |
| pool *session.Pool, |
| opts ...*options.ListIndexesOptions, |
| ) (*BatchCursor, error) { |
| |
| ss, err := topo.SelectServer(ctx, selector) |
| if err != nil { |
| return nil, err |
| } |
| |
| conn, err := ss.Connection(ctx) |
| if err != nil { |
| return nil, err |
| } |
| defer conn.Close() |
| |
| if ss.Description().WireVersion.Max < 3 { |
| return legacyListIndexes(ctx, cmd, ss, conn, opts...) |
| } |
| |
| lio := options.MergeListIndexesOptions(opts...) |
| if lio.BatchSize != nil { |
| elem := bsonx.Elem{"batchSize", bsonx.Int32(*lio.BatchSize)} |
| cmd.Opts = append(cmd.Opts, elem) |
| cmd.CursorOpts = append(cmd.CursorOpts, elem) |
| } |
| if lio.MaxTime != nil { |
| cmd.Opts = append(cmd.Opts, bsonx.Elem{"maxTimeMS", bsonx.Int64(int64(*lio.MaxTime / time.Millisecond))}) |
| } |
| |
| // If no explicit session and deployment supports sessions, start implicit session. |
| if cmd.Session == nil && topo.SupportsSessions() { |
| cmd.Session, err = session.NewClientSession(pool, clientID, session.Implicit) |
| if err != nil { |
| return nil, err |
| } |
| } |
| |
| res, err := cmd.RoundTrip(ctx, ss.Description(), conn) |
| if err != nil { |
| closeImplicitSession(cmd.Session) |
| return nil, err |
| } |
| |
| return NewBatchCursor(bsoncore.Document(res), cmd.Session, cmd.Clock, ss.Server, cmd.CursorOpts...) |
| } |
| |
| func legacyListIndexes( |
| ctx context.Context, |
| cmd command.ListIndexes, |
| ss *topology.SelectedServer, |
| conn connection.Connection, |
| opts ...*options.ListIndexesOptions, |
| ) (*BatchCursor, error) { |
| lio := options.MergeListIndexesOptions(opts...) |
| ns := cmd.NS.DB + "." + cmd.NS.Collection |
| |
| findCmd := command.Find{ |
| NS: command.NewNamespace(cmd.NS.DB, "system.indexes"), |
| Filter: bsonx.Doc{ |
| {"ns", bsonx.String(ns)}, |
| }, |
| } |
| |
| findOpts := options.Find() |
| if lio.BatchSize != nil { |
| findOpts.SetBatchSize(*lio.BatchSize) |
| } |
| if lio.MaxTime != nil { |
| findOpts.SetMaxTime(*lio.MaxTime) |
| } |
| |
| return legacyFind(ctx, findCmd, nil, ss, conn, findOpts) |
| } |