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errors.go
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// Copyright 2022-2024 The NATS Authors
// 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 jetstream
import (
"errors"
"fmt"
)
type (
// JetStreamError is an error result that happens when using JetStream.
// In case of client-side error, [APIError] returns nil.
JetStreamError interface {
APIError() *APIError
error
}
jsError struct {
apiErr *APIError
message string
}
// APIError is included in all API responses if there was an error.
APIError struct {
Code int `json:"code"`
ErrorCode ErrorCode `json:"err_code"`
Description string `json:"description,omitempty"`
}
// ErrorCode represents error_code returned in response from JetStream API.
ErrorCode uint16
)
const (
JSErrCodeJetStreamNotEnabledForAccount ErrorCode = 10039
JSErrCodeJetStreamNotEnabled ErrorCode = 10076
JSErrCodeStreamNotFound ErrorCode = 10059
JSErrCodeStreamNameInUse ErrorCode = 10058
JSErrCodeConsumerCreate ErrorCode = 10012
JSErrCodeConsumerNotFound ErrorCode = 10014
JSErrCodeConsumerNameExists ErrorCode = 10013
JSErrCodeConsumerAlreadyExists ErrorCode = 10105
JSErrCodeConsumerExists ErrorCode = 10148
JSErrCodeDuplicateFilterSubjects ErrorCode = 10136
JSErrCodeOverlappingFilterSubjects ErrorCode = 10138
JSErrCodeConsumerEmptyFilter ErrorCode = 10139
JSErrCodeConsumerDoesNotExist ErrorCode = 10149
JSErrCodeMessageNotFound ErrorCode = 10037
JSErrCodeBadRequest ErrorCode = 10003
JSErrCodeStreamWrongLastSequence ErrorCode = 10071
)
var (
// JetStream API errors
// ErrJetStreamNotEnabled is an error returned when JetStream is not
// enabled.
//
// Note: This error will not be returned in clustered mode, even if each
// server in the cluster does not have JetStream enabled. In clustered mode,
// requests will time out instead.
ErrJetStreamNotEnabled JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeJetStreamNotEnabled, Description: "jetstream not enabled", Code: 503}}
// ErrJetStreamNotEnabledForAccount is an error returned when JetStream is
// not enabled for an account.
ErrJetStreamNotEnabledForAccount JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeJetStreamNotEnabledForAccount, Description: "jetstream not enabled for account", Code: 503}}
// ErrStreamNotFound is an error returned when stream with given name does
// not exist.
ErrStreamNotFound JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeStreamNotFound, Description: "stream not found", Code: 404}}
// ErrStreamNameAlreadyInUse is returned when a stream with given name
// already exists and has a different configuration.
ErrStreamNameAlreadyInUse JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeStreamNameInUse, Description: "stream name already in use", Code: 400}}
// ErrStreamSubjectTransformNotSupported is returned when the connected
// nats-server version does not support setting the stream subject
// transform. If this error is returned when executing CreateStream(), the
// stream with invalid configuration was already created in the server.
ErrStreamSubjectTransformNotSupported JetStreamError = &jsError{message: "stream subject transformation not supported by nats-server"}
// ErrStreamSourceSubjectTransformNotSupported is returned when the
// connected nats-server version does not support setting the stream source
// subject transform. If this error is returned when executing
// CreateStream(), the stream with invalid configuration was already created
// in the server.
ErrStreamSourceSubjectTransformNotSupported JetStreamError = &jsError{message: "stream subject transformation not supported by nats-server"}
// ErrStreamSourceNotSupported is returned when the connected nats-server
// version does not support setting the stream sources. If this error is
// returned when executing CreateStream(), the stream with invalid
// configuration was already created in the server.
ErrStreamSourceNotSupported JetStreamError = &jsError{message: "stream sourcing is not supported by nats-server"}
// ErrStreamSourceMultipleFilterSubjectsNotSupported is returned when the
// connected nats-server version does not support setting the stream
// sources. If this error is returned when executing CreateStream(), the
// stream with invalid configuration was already created in the server.
ErrStreamSourceMultipleFilterSubjectsNotSupported JetStreamError = &jsError{message: "stream sourcing with multiple subject filters not supported by nats-server"}
// ErrConsumerNotFound is an error returned when consumer with given name
// does not exist.
ErrConsumerNotFound JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeConsumerNotFound, Description: "consumer not found", Code: 404}}
// ErrConsumerExists is returned when attempting to create a consumer with
// CreateConsumer but a consumer with given name already exists.
ErrConsumerExists JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeConsumerExists, Description: "consumer already exists", Code: 400}}
// ErrConsumerNameExists is returned when attempting to update a consumer
// with UpdateConsumer but a consumer with given name does not exist.
ErrConsumerDoesNotExist JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeConsumerDoesNotExist, Description: "consumer does not exist", Code: 400}}
// ErrMsgNotFound is returned when message with provided sequence number
// does not exist.
ErrMsgNotFound JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeMessageNotFound, Description: "message not found", Code: 404}}
// ErrBadRequest is returned when invalid request is sent to JetStream API.
ErrBadRequest JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeBadRequest, Description: "bad request", Code: 400}}
// ErrConsumerCreate is returned when nats-server reports error when
// creating consumer (e.g. illegal update).
ErrConsumerCreate JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeConsumerCreate, Description: "could not create consumer", Code: 500}}
// ErrDuplicateFilterSubjects is returned when both FilterSubject and
// FilterSubjects are specified when creating consumer.
ErrDuplicateFilterSubjects JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeDuplicateFilterSubjects, Description: "consumer cannot have both FilterSubject and FilterSubjects specified", Code: 500}}
// ErrDuplicateFilterSubjects is returned when filter subjects overlap when
// creating consumer.
ErrOverlappingFilterSubjects JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeOverlappingFilterSubjects, Description: "consumer subject filters cannot overlap", Code: 500}}
// ErrEmptyFilter is returned when a filter in FilterSubjects is empty.
ErrEmptyFilter JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeConsumerEmptyFilter, Description: "consumer filter in FilterSubjects cannot be empty", Code: 500}}
// Client errors
// ErrConsumerMultipleFilterSubjectsNotSupported is returned when the
// connected nats-server version does not support setting multiple filter
// subjects with filter_subjects field. If this error is returned when
// executing AddConsumer(), the consumer with invalid configuration was
// already created in the server.
ErrConsumerMultipleFilterSubjectsNotSupported JetStreamError = &jsError{message: "multiple consumer filter subjects not supported by nats-server"}
// ErrConsumerNotFound is an error returned when consumer with given name
// does not exist.
ErrConsumerNameAlreadyInUse JetStreamError = &jsError{message: "consumer name already in use"}
// ErrInvalidJSAck is returned when JetStream ack from message publish is
// invalid.
ErrInvalidJSAck JetStreamError = &jsError{message: "invalid jetstream publish response"}
// ErrStreamNameRequired is returned when the provided stream name is empty.
ErrStreamNameRequired JetStreamError = &jsError{message: "stream name is required"}
// ErrMsgAlreadyAckd is returned when attempting to acknowledge message more
// than once.
ErrMsgAlreadyAckd JetStreamError = &jsError{message: "message was already acknowledged"}
// ErrNoStreamResponse is returned when there is no response from stream
// (e.g. no responders error).
ErrNoStreamResponse JetStreamError = &jsError{message: "no response from stream"}
// ErrNotJSMessage is returned when attempting to get metadata from non
// JetStream message.
ErrNotJSMessage JetStreamError = &jsError{message: "not a jetstream message"}
// ErrInvalidStreamName is returned when the provided stream name is invalid
// (contains '.').
ErrInvalidStreamName JetStreamError = &jsError{message: "invalid stream name"}
// ErrInvalidSubject is returned when the provided subject name is invalid.
ErrInvalidSubject JetStreamError = &jsError{message: "invalid subject name"}
// ErrInvalidConsumerName is returned when the provided consumer name is
// invalid (contains '.').
ErrInvalidConsumerName JetStreamError = &jsError{message: "invalid consumer name"}
// ErrNoMessages is returned when no messages are currently available for a
// consumer.
ErrNoMessages JetStreamError = &jsError{message: "no messages"}
// ErrMaxBytesExceeded is returned when a message would exceed MaxBytes set
// on a pull request.
ErrMaxBytesExceeded JetStreamError = &jsError{message: "message size exceeds max bytes"}
// ErrConsumerDeleted is returned when attempting to send pull request to a
// consumer which does not exist.
ErrConsumerDeleted JetStreamError = &jsError{message: "consumer deleted"}
// ErrConsumerLeadershipChanged is returned when pending requests are no
// longer valid after leadership has changed.
ErrConsumerLeadershipChanged JetStreamError = &jsError{message: "leadership change"}
// ErrHandlerRequired is returned when no handler func is provided in
// Stream().
ErrHandlerRequired JetStreamError = &jsError{message: "handler cannot be empty"}
// ErrEndOfData is returned when iterating over paged API from JetStream
// reaches end of data.
ErrEndOfData JetStreamError = &jsError{message: "end of data reached"}
// ErrNoHeartbeat is received when no message is received in IdleHeartbeat
// time (if set).
ErrNoHeartbeat JetStreamError = &jsError{message: "no heartbeat received"}
// ErrConsumerHasActiveSubscription is returned when a consumer is already
// subscribed to a stream.
ErrConsumerHasActiveSubscription JetStreamError = &jsError{message: "consumer has active subscription"}
// ErrMsgNotBound is returned when given message is not bound to any
// subscription.
ErrMsgNotBound JetStreamError = &jsError{message: "message is not bound to subscription/connection"}
// ErrMsgNoReply is returned when attempting to reply to a message without a
// reply subject.
ErrMsgNoReply JetStreamError = &jsError{message: "message does not have a reply"}
// ErrMsgDeleteUnsuccessful is returned when an attempt to delete a message
// is unsuccessful.
ErrMsgDeleteUnsuccessful JetStreamError = &jsError{message: "message deletion unsuccessful"}
// ErrAsyncPublishReplySubjectSet is returned when reply subject is set on
// async message publish.
ErrAsyncPublishReplySubjectSet JetStreamError = &jsError{message: "reply subject should be empty"}
// ErrTooManyStalledMsgs is returned when too many outstanding async
// messages are waiting for ack.
ErrTooManyStalledMsgs JetStreamError = &jsError{message: "stalled with too many outstanding async published messages"}
// ErrInvalidOption is returned when there is a collision between options.
ErrInvalidOption JetStreamError = &jsError{message: "invalid jetstream option"}
// ErrMsgIteratorClosed is returned when attempting to get message from a
// closed iterator.
ErrMsgIteratorClosed JetStreamError = &jsError{message: "messages iterator closed"}
// ErrOrderedConsumerReset is returned when resetting ordered consumer fails
// due to too many attempts.
ErrOrderedConsumerReset JetStreamError = &jsError{message: "recreating ordered consumer"}
// ErrOrderConsumerUsedAsFetch is returned when ordered consumer was already
// used to process messages using Fetch (or FetchBytes).
ErrOrderConsumerUsedAsFetch JetStreamError = &jsError{message: "ordered consumer initialized as fetch"}
// ErrOrderConsumerUsedAsConsume is returned when ordered consumer was
// already used to process messages using Consume or Messages.
ErrOrderConsumerUsedAsConsume JetStreamError = &jsError{message: "ordered consumer initialized as consume"}
// ErrOrderedConsumerConcurrentRequests is returned when attempting to run
// concurrent operations on ordered consumers.
ErrOrderedConsumerConcurrentRequests JetStreamError = &jsError{message: "cannot run concurrent processing using ordered consumer"}
// ErrOrderedConsumerNotCreated is returned when trying to get consumer info
// of an ordered consumer which was not yet created.
ErrOrderedConsumerNotCreated JetStreamError = &jsError{message: "consumer instance not yet created"}
// KeyValue Errors
// ErrKeyExists is returned when attempting to create a key that already
// exists.
ErrKeyExists JetStreamError = &jsError{apiErr: &APIError{ErrorCode: JSErrCodeStreamWrongLastSequence, Code: 400}, message: "key exists"}
// ErrKeyValueConfigRequired is returned when attempting to create a bucket
// without a config.
ErrKeyValueConfigRequired JetStreamError = &jsError{message: "config required"}
// ErrInvalidBucketName is returned when attempting to create a bucket with
// an invalid name.
ErrInvalidBucketName JetStreamError = &jsError{message: "invalid bucket name"}
// ErrInvalidKey is returned when attempting to create a key with an invalid
// name.
ErrInvalidKey JetStreamError = &jsError{message: "invalid key"}
// ErrBucketExists is returned when attempting to create a bucket that
// already exists and has a different configuration.
ErrBucketExists JetStreamError = &jsError{message: "bucket name already in use"}
// ErrBucketNotFound is returned when attempting to access a bucket that
// does not exist.
ErrBucketNotFound JetStreamError = &jsError{message: "bucket not found"}
// ErrBadBucket is returned when attempting to access a bucket that is not a
// key-value store.
ErrBadBucket JetStreamError = &jsError{message: "bucket not valid key-value store"}
// ErrKeyNotFound is returned when attempting to access a key that does not
// exist.
ErrKeyNotFound JetStreamError = &jsError{message: "key not found"}
// ErrKeyDeleted is returned when attempting to access a key that was
// deleted.
ErrKeyDeleted JetStreamError = &jsError{message: "key was deleted"}
// ErrHistoryToLarge is returned when provided history limit is larger than
// 64.
ErrHistoryTooLarge JetStreamError = &jsError{message: "history limited to a max of 64"}
// ErrNoKeysFound is returned when no keys are found.
ErrNoKeysFound JetStreamError = &jsError{message: "no keys found"}
// ErrObjectConfigRequired is returned when attempting to create an object
// without a config.
ErrObjectConfigRequired JetStreamError = &jsError{message: "object-store config required"}
// ErrBadObjectMeta is returned when the meta information of an object is
// invalid.
ErrBadObjectMeta JetStreamError = &jsError{message: "object-store meta information invalid"}
// ErrObjectNotFound is returned when an object is not found.
ErrObjectNotFound JetStreamError = &jsError{message: "object not found"}
// ErrInvalidStoreName is returned when the name of an object-store is
// invalid.
ErrInvalidStoreName JetStreamError = &jsError{message: "invalid object-store name"}
// ErrDigestMismatch is returned when the digests of an object do not match.
ErrDigestMismatch JetStreamError = &jsError{message: "received a corrupt object, digests do not match"}
// ErrInvalidDigestFormat is returned when the digest hash of an object has
// an invalid format.
ErrInvalidDigestFormat JetStreamError = &jsError{message: "object digest hash has invalid format"}
// ErrNoObjectsFound is returned when no objects are found.
ErrNoObjectsFound JetStreamError = &jsError{message: "no objects found"}
// ErrObjectAlreadyExists is returned when an object with the same name
// already exists.
ErrObjectAlreadyExists JetStreamError = &jsError{message: "an object already exists with that name"}
// ErrNameRequired is returned when a name is required.
ErrNameRequired JetStreamError = &jsError{message: "name is required"}
// ErrLinkNotAllowed is returned when a link cannot be set when putting the
// object in a bucket.
ErrLinkNotAllowed JetStreamError = &jsError{message: "link cannot be set when putting the object in bucket"}
// ErrObjectRequired is returned when an object is required.
ErrObjectRequired = &jsError{message: "object required"}
// ErrNoLinkToDeleted is returned when it is not allowed to link to a
// deleted object.
ErrNoLinkToDeleted JetStreamError = &jsError{message: "not allowed to link to a deleted object"}
// ErrNoLinkToLink is returned when it is not allowed to link to another
// link.
ErrNoLinkToLink JetStreamError = &jsError{message: "not allowed to link to another link"}
// ErrCantGetBucket is returned when an invalid Get is attempted on an
// object that is a link to a bucket.
ErrCantGetBucket JetStreamError = &jsError{message: "invalid Get, object is a link to a bucket"}
// ErrBucketRequired is returned when a bucket is required.
ErrBucketRequired JetStreamError = &jsError{message: "bucket required"}
// ErrBucketMalformed is returned when a bucket is malformed.
ErrBucketMalformed JetStreamError = &jsError{message: "bucket malformed"}
// ErrUpdateMetaDeleted is returned when the meta information of a deleted
// object cannot be updated.
ErrUpdateMetaDeleted JetStreamError = &jsError{message: "cannot update meta for a deleted object"}
)
// Error prints the JetStream API error code and description.
func (e *APIError) Error() string {
return fmt.Sprintf("nats: API error: code=%d err_code=%d description=%s", e.Code, e.ErrorCode, e.Description)
}
// APIError implements the JetStreamError interface.
func (e *APIError) APIError() *APIError {
return e
}
// Is matches against an APIError.
func (e *APIError) Is(err error) bool {
if e == nil {
return false
}
// Extract internal APIError to match against.
var aerr *APIError
ok := errors.As(err, &aerr)
if !ok {
return ok
}
return e.ErrorCode == aerr.ErrorCode
}
func (err *jsError) APIError() *APIError {
return err.apiErr
}
func (err *jsError) Error() string {
if err.apiErr != nil && err.apiErr.Description != "" {
return err.apiErr.Error()
}
return fmt.Sprintf("nats: %s", err.message)
}
func (err *jsError) Unwrap() error {
// Allow matching to embedded APIError in case there is one.
if err.apiErr == nil {
return nil
}
return err.apiErr
}