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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 options
import (
"time"
"go.mongodb.org/mongo-driver/mongo/readconcern"
"go.mongodb.org/mongo-driver/mongo/readpref"
"go.mongodb.org/mongo-driver/mongo/writeconcern"
)
// DefaultCausalConsistency is the default value for the CausalConsistency option.
var DefaultCausalConsistency = true
// SessionOptions represents all possible options for creating a new session.
type SessionOptions struct {
CausalConsistency *bool // Specifies if reads should be causally consistent. Defaults to true.
DefaultReadConcern *readconcern.ReadConcern // The default read concern for transactions started in the session.
DefaultReadPreference *readpref.ReadPref // The default read preference for transactions started in the session.
DefaultWriteConcern *writeconcern.WriteConcern // The default write concern for transactions started in the session.
DefaultMaxCommitTime *time.Duration // The default max commit time for transactions started in the session.
}
// Session creates a new *SessionOptions
func Session() *SessionOptions {
return &SessionOptions{
CausalConsistency: &DefaultCausalConsistency,
}
}
// SetCausalConsistency specifies if a session should be causally consistent. Defaults to true.
func (s *SessionOptions) SetCausalConsistency(b bool) *SessionOptions {
s.CausalConsistency = &b
return s
}
// SetDefaultReadConcern sets the default read concern for transactions started in a session.
func (s *SessionOptions) SetDefaultReadConcern(rc *readconcern.ReadConcern) *SessionOptions {
s.DefaultReadConcern = rc
return s
}
// SetDefaultReadPreference sets the default read preference for transactions started in a session.
func (s *SessionOptions) SetDefaultReadPreference(rp *readpref.ReadPref) *SessionOptions {
s.DefaultReadPreference = rp
return s
}
// SetDefaultWriteConcern sets the default write concern for transactions started in a session.
func (s *SessionOptions) SetDefaultWriteConcern(wc *writeconcern.WriteConcern) *SessionOptions {
s.DefaultWriteConcern = wc
return s
}
// SetDefaultMaxCommitTime sets the default max commit time for transactions started in a session.
func (s *SessionOptions) SetDefaultMaxCommitTime(mct *time.Duration) *SessionOptions {
s.DefaultMaxCommitTime = mct
return s
}
// MergeSessionOptions combines the given *SessionOptions into a single *SessionOptions in a last one wins fashion.
func MergeSessionOptions(opts ...*SessionOptions) *SessionOptions {
s := Session()
for _, opt := range opts {
if opt == nil {
continue
}
if opt.CausalConsistency != nil {
s.CausalConsistency = opt.CausalConsistency
}
if opt.DefaultReadConcern != nil {
s.DefaultReadConcern = opt.DefaultReadConcern
}
if opt.DefaultReadPreference != nil {
s.DefaultReadPreference = opt.DefaultReadPreference
}
if opt.DefaultWriteConcern != nil {
s.DefaultWriteConcern = opt.DefaultWriteConcern
}
if opt.DefaultMaxCommitTime != nil {
s.DefaultMaxCommitTime = opt.DefaultMaxCommitTime
}
}
return s
}
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