/
utils.go
205 lines (168 loc) · 4.9 KB
/
utils.go
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// Copyright 2019 Aporeto Inc.
// 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 manipmongo
import (
"io"
"net"
"strings"
"github.com/globalsign/mgo"
"github.com/globalsign/mgo/bson"
"go.aporeto.io/manipulate"
)
// invertSortKey eventually inverts the given sorting key.
func invertSortKey(k string, revert bool) string {
if !revert {
return k
}
if strings.HasPrefix(k, "-") {
return k[1:]
}
return "-" + k
}
func applyOrdering(order []string, inverted bool) []string {
o := []string{} // nolint: prealloc
for _, f := range order {
if f == "" {
continue
}
if f == "ID" || f == "id" {
f = "_id"
}
o = append(o, strings.ToLower(invertSortKey(f, inverted)))
}
return o
}
func handleQueryError(err error) error {
if _, ok := err.(net.Error); ok {
return manipulate.NewErrCannotCommunicate(err.Error())
}
if err == mgo.ErrNotFound {
return manipulate.NewErrObjectNotFound("cannot find the object for the given ID")
}
if mgo.IsDup(err) {
return manipulate.NewErrConstraintViolation("duplicate key.")
}
if isConnectionError(err) {
return manipulate.NewErrCannotCommunicate(err.Error())
}
// see https://github.com/mongodb/mongo/blob/master/src/mongo/base/error_codes.err
switch getErrorCode(err) {
case 6, 7, 71, 74, 91, 109, 189, 202, 216, 262, 10107, 13436, 13435, 11600, 11602:
// HostUnreachable
// HostNotFound,
// ReplicaSetNotFound,
// NodeNotFound,
// ConfigurationInProgress,
// ShutdownInProgress
// PrimarySteppedDown,
// NetworkInterfaceExceededTimeLimit
// ElectionInProgress
// ExceededTimeLimit
// NotMaster
// NotMasterOrSecondary
// NotMasterNoSlaveOk
// InterruptedAtShutdown
// InterruptedDueToStepDown
return manipulate.NewErrCannotCommunicate(err.Error())
default:
return manipulate.NewErrCannotExecuteQuery(err.Error())
}
}
func getErrorCode(err error) int {
switch e := err.(type) {
case *mgo.QueryError:
return e.Code
case *mgo.LastError:
return e.Code
case *mgo.BulkError:
// we just get the first
for _, c := range e.Cases() {
return getErrorCode(c.Err)
}
}
return 0
}
func isConnectionError(err error) bool {
if err == nil {
return false
}
// Stolen from mongodb code. this is ugly.
const (
errLostConnection = "lost connection to server"
errNoReachableServers = "no reachable servers"
errReplTimeoutPrefix = "waiting for replication timed out"
errCouldNotContactPrimaryPrefix = "could not contact primary for replica set"
errWriteResultsUnavailable = "write results unavailable from"
errCouldNotFindPrimaryPrefix = `could not find host matching read preference { mode: "primary"`
errUnableToTargetPrefix = "unable to target"
errNotMaster = "not master"
errConnectionRefusedSuffix = "connection refused"
)
lowerCaseError := strings.ToLower(err.Error())
if lowerCaseError == errNoReachableServers ||
err == io.EOF ||
strings.Contains(lowerCaseError, errLostConnection) ||
strings.Contains(lowerCaseError, errReplTimeoutPrefix) ||
strings.Contains(lowerCaseError, errCouldNotContactPrimaryPrefix) ||
strings.Contains(lowerCaseError, errWriteResultsUnavailable) ||
strings.Contains(lowerCaseError, errCouldNotFindPrimaryPrefix) ||
strings.Contains(lowerCaseError, errUnableToTargetPrefix) ||
lowerCaseError == errNotMaster ||
strings.HasSuffix(lowerCaseError, errConnectionRefusedSuffix) {
return true
}
return false
}
func makeFieldsSelector(fields []string) bson.M {
if len(fields) == 0 {
return nil
}
sels := bson.M{}
for _, f := range fields {
if f == "" {
continue
}
if f == "ID" || f == "id" {
f = "_id"
}
sels[strings.ToLower(f)] = 1
}
if len(sels) == 0 {
return nil
}
return sels
}
func convertReadConsistency(c manipulate.ReadConsistency) mgo.Mode {
switch c {
case manipulate.ReadConsistencyEventual:
return mgo.Eventual
case manipulate.ReadConsistencyMonotonic:
return mgo.Monotonic
case manipulate.ReadConsistencyNearest:
return mgo.Nearest
case manipulate.ReadConsistencyStrong:
return mgo.Strong
default:
return -1
}
}
func convertWriteConsistency(c manipulate.WriteConsistency) *mgo.Safe {
switch c {
case manipulate.WriteConsistencyNone:
return nil
case manipulate.WriteConsistencyStrong:
return &mgo.Safe{WMode: "majority"}
case manipulate.WriteConsistencyStrongest:
return &mgo.Safe{WMode: "majority", J: true}
default:
return &mgo.Safe{}
}
}