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abort_transaction.go
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/
abort_transaction.go
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// 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"
"go.mongodb.org/mongo-driver/x/mongo/driver/topology"
"go.mongodb.org/mongo-driver/x/network/command"
"go.mongodb.org/mongo-driver/x/network/description"
"go.mongodb.org/mongo-driver/x/network/result"
)
// AbortTransaction handles the full cycle dispatch and execution of abortting a transaction
// against the provided topology.
func AbortTransaction(
ctx context.Context,
cmd command.AbortTransaction,
topo *topology.Topology,
selector description.ServerSelector,
) (result.TransactionResult, error) {
res, err := abortTransaction(ctx, cmd, topo, selector, nil)
if cerr, ok := err.(command.Error); ok && err != nil {
// Retry if appropriate
if cerr.Retryable() {
res, err = abortTransaction(ctx, cmd, topo, selector, cerr)
}
}
return res, err
}
func abortTransaction(
ctx context.Context,
cmd command.AbortTransaction,
topo *topology.Topology,
selector description.ServerSelector,
oldErr error,
) (result.TransactionResult, error) {
ss, err := topo.SelectServer(ctx, selector)
if err != nil {
// If retrying server selection, return the original error if it fails
if oldErr != nil {
return result.TransactionResult{}, oldErr
}
return result.TransactionResult{}, err
}
desc := ss.Description()
if oldErr != nil && (!topo.SupportsSessions() || !description.SessionsSupported(desc.WireVersion)) {
// Assuming we are retrying (oldErr != nil),
// if server doesn't support retryable writes, return the original error
// Conditions for retry write support are the same as that of sessions
return result.TransactionResult{}, oldErr
}
conn, err := ss.Connection(ctx)
if err != nil {
if oldErr != nil {
return result.TransactionResult{}, oldErr
}
return result.TransactionResult{}, err
}
defer conn.Close()
return cmd.RoundTrip(ctx, desc, conn)
}