74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
/*
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Copyright 2019 github.com/ucirello
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package dynamolock
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import (
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"fmt"
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"time"
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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/service/dynamodb"
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)
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// TimeoutError indicates that the dynamolock gave up acquiring the lock. It
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// holds the length of the attempt that resulted in the error.
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type TimeoutError struct {
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Age time.Duration
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}
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func (e *TimeoutError) Error() string {
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return fmt.Sprintf("timeout: %s", e.Age)
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}
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// LockNotGrantedError indicates that an AcquireLock call has failed to
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// establish a lock because of its current lifecycle state.
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type LockNotGrantedError struct {
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msg string
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cause error
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}
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func (e *LockNotGrantedError) Error() string {
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msg := e.msg
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if e.cause != nil {
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msg += ": " + e.cause.Error()
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}
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return msg
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}
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// Unwrap reveals the underlying cause why the lock was not granted.
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func (e *LockNotGrantedError) Unwrap() error {
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return e.cause
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}
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func isLockNotGrantedError(err error) bool {
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_, ok := err.(*LockNotGrantedError)
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return ok
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}
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func parseDynamoDBError(err error, msg string) error {
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if aerr, ok := err.(awserr.Error); ok {
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switch aerr.Code() {
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case dynamodb.ErrCodeConditionalCheckFailedException:
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return &LockNotGrantedError{
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msg: msg,
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cause: aerr,
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}
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}
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}
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return err
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}
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