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// Copyright 2020-2022 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.
//
//! Manage operations on [Context], create/delete/update [Stream]
use crate::error::Error;
use crate::header::{IntoHeaderName, IntoHeaderValue};
use crate::jetstream::account::Account;
use crate::jetstream::publish::PublishAck;
use crate::jetstream::response::Response;
use crate::subject::ToSubject;
use crate::{
header, is_valid_subject, Client, Command, HeaderMap, HeaderValue, Message, StatusCode,
};
use bytes::Bytes;
use futures::future::BoxFuture;
use futures::{Future, StreamExt, TryFutureExt};
use serde::de::DeserializeOwned;
use serde::{Deserialize, Serialize};
use serde_json::{self, json};
use std::borrow::Borrow;
use std::fmt::Display;
use std::future::IntoFuture;
use std::pin::Pin;
use std::str::from_utf8;
use std::task::Poll;
use std::time::Duration;
use tokio::sync::oneshot;
use tracing::debug;
use super::consumer::{self, Consumer, FromConsumer, IntoConsumerConfig};
use super::errors::ErrorCode;
use super::is_valid_name;
use super::kv::{Store, MAX_HISTORY};
use super::object_store::{is_valid_bucket_name, ObjectStore};
use super::stream::{
self, Config, ConsumerError, ConsumerErrorKind, DeleteStatus, DiscardPolicy, External, Info,
Stream,
};
#[cfg(feature = "server_2_10")]
use super::stream::{Compression, ConsumerCreateStrictError, ConsumerUpdateError};
/// A context which can perform jetstream scoped requests.
#[derive(Debug, Clone)]
pub struct Context {
pub(crate) client: Client,
pub(crate) prefix: String,
pub(crate) timeout: Duration,
}
impl Context {
pub(crate) fn new(client: Client) -> Context {
Context {
client,
prefix: "$JS.API".to_string(),
timeout: Duration::from_secs(5),
}
}
pub fn set_timeout(&mut self, timeout: Duration) {
self.timeout = timeout
}
pub(crate) fn with_prefix<T: ToString>(client: Client, prefix: T) -> Context {
Context {
client,
prefix: prefix.to_string(),
timeout: Duration::from_secs(5),
}
}
pub(crate) fn with_domain<T: AsRef<str>>(client: Client, domain: T) -> Context {
Context {
client,
prefix: format!("$JS.{}.API", domain.as_ref()),
timeout: Duration::from_secs(5),
}
}
/// Publishes [jetstream::Message][super::message::Message] to the [Stream] without waiting for
/// acknowledgment from the server that the message has been successfully delivered.
///
/// Acknowledgment future that can be polled is returned instead.
///
/// If the stream does not exist, `no responders` error will be returned.
///
/// # Examples
///
/// Publish, and after each publish, await for acknowledgment.
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let ack = jetstream.publish("events", "data".into()).await?;
/// ack.await?;
/// jetstream.publish("events", "data".into()).await?.await?;
/// # Ok(())
/// # }
/// ```
///
/// Publish and do not wait for the acknowledgment. Await can be deferred to when needed or
/// ignored entirely.
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let first_ack = jetstream.publish("events", "data".into()).await?;
/// let second_ack = jetstream.publish("events", "data".into()).await?;
/// first_ack.await?;
/// second_ack.await?;
/// # Ok(())
/// # }
/// ```
pub async fn publish<S: ToSubject>(
&self,
subject: S,
payload: Bytes,
) -> Result<PublishAckFuture, PublishError> {
self.send_publish(subject, Publish::build().payload(payload))
.await
}
/// Publish a message with headers to a given subject associated with a stream and returns an acknowledgment from
/// the server that the message has been successfully delivered.
///
/// If the stream does not exist, `no responders` error will be returned.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let mut headers = async_nats::HeaderMap::new();
/// headers.append("X-key", "Value");
/// let ack = jetstream
/// .publish_with_headers("events", headers, "data".into())
/// .await?;
/// # Ok(())
/// # }
/// ```
pub async fn publish_with_headers<S: ToSubject>(
&self,
subject: S,
headers: crate::header::HeaderMap,
payload: Bytes,
) -> Result<PublishAckFuture, PublishError> {
self.send_publish(subject, Publish::build().payload(payload).headers(headers))
.await
}
/// Publish a message built by [Publish] and returns an acknowledgment future.
///
/// If the stream does not exist, `no responders` error will be returned.
///
/// # Examples
///
/// ```no_run
/// # use async_nats::jetstream::context::Publish;
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let ack = jetstream
/// .send_publish(
/// "events",
/// Publish::build().payload("data".into()).message_id("uuid"),
/// )
/// .await?;
/// # Ok(())
/// # }
/// ```
pub async fn send_publish<S: ToSubject>(
&self,
subject: S,
publish: Publish,
) -> Result<PublishAckFuture, PublishError> {
let subject = subject.to_subject();
let (sender, receiver) = oneshot::channel();
let respond = self.client.new_inbox().into();
let send_fut = self
.client
.sender
.send(Command::Request {
subject,
payload: publish.payload,
respond,
headers: publish.headers,
sender,
})
.map_err(|err| PublishError::with_source(PublishErrorKind::Other, err));
tokio::time::timeout(self.timeout, send_fut)
.map_err(|_elapsed| PublishError::new(PublishErrorKind::TimedOut))
.await??;
Ok(PublishAckFuture {
timeout: self.timeout,
subscription: receiver,
})
}
/// Query the server for account information
pub async fn query_account(&self) -> Result<Account, AccountError> {
let response: Response<Account> = self.request("INFO", b"").await?;
match response {
Response::Err { error } => Err(AccountError::new(AccountErrorKind::JetStream(error))),
Response::Ok(account) => Ok(account),
}
}
/// Create a JetStream [Stream] with given config and return a handle to it.
/// That handle can be used to manage and use [Consumer].
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use async_nats::jetstream::stream::Config;
/// use async_nats::jetstream::stream::DiscardPolicy;
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let stream = jetstream
/// .create_stream(Config {
/// name: "events".to_string(),
/// max_messages: 100_000,
/// discard: DiscardPolicy::Old,
/// ..Default::default()
/// })
/// .await?;
/// # Ok(())
/// # }
/// ```
pub async fn create_stream<S>(
&self,
stream_config: S,
) -> Result<Stream<Info>, CreateStreamError>
where
Config: From<S>,
{
let mut config: Config = stream_config.into();
if config.name.is_empty() {
return Err(CreateStreamError::new(
CreateStreamErrorKind::EmptyStreamName,
));
}
if !is_valid_name(config.name.as_str()) {
return Err(CreateStreamError::new(
CreateStreamErrorKind::InvalidStreamName,
));
}
if let Some(ref mut mirror) = config.mirror {
if let Some(ref mut domain) = mirror.domain {
if mirror.external.is_some() {
return Err(CreateStreamError::new(
CreateStreamErrorKind::DomainAndExternalSet,
));
}
mirror.external = Some(External {
api_prefix: format!("$JS.{domain}.API"),
delivery_prefix: None,
})
}
}
if let Some(ref mut sources) = config.sources {
for source in sources {
if let Some(ref mut domain) = source.domain {
if source.external.is_some() {
return Err(CreateStreamError::new(
CreateStreamErrorKind::DomainAndExternalSet,
));
}
source.external = Some(External {
api_prefix: format!("$JS.{domain}.API"),
delivery_prefix: None,
})
}
}
}
let subject = format!("STREAM.CREATE.{}", config.name);
let response: Response<Info> = self.request(subject, &config).await?;
match response {
Response::Err { error } => Err(error.into()),
Response::Ok(info) => Ok(Stream {
context: self.clone(),
info,
name: config.name,
}),
}
}
/// Checks for [Stream] existence on the server and returns handle to it.
/// That handle can be used to manage and use [Consumer].
/// This variant does not fetch [Stream] info from the server.
/// It means it does not check if the stream actually exists.
/// If you run more operations on few streams, it is better to use [Context::get_stream] instead.
/// If you however run single operations on many streams, this method is more efficient.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let stream = jetstream.get_stream("events").await?;
/// # Ok(())
/// # }
/// ```
pub async fn get_stream_no_info<T: AsRef<str>>(
&self,
stream: T,
) -> Result<Stream<()>, GetStreamError> {
let stream = stream.as_ref();
if stream.is_empty() {
return Err(GetStreamError::new(GetStreamErrorKind::EmptyName));
}
if !is_valid_name(stream) {
return Err(GetStreamError::new(GetStreamErrorKind::InvalidStreamName));
}
Ok(Stream {
context: self.clone(),
info: (),
name: stream.to_string(),
})
}
/// Checks for [Stream] existence on the server and returns handle to it.
/// That handle can be used to manage and use [Consumer].
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let stream = jetstream.get_stream("events").await?;
/// # Ok(())
/// # }
/// ```
pub async fn get_stream<T: AsRef<str>>(&self, stream: T) -> Result<Stream, GetStreamError> {
let stream = stream.as_ref();
if stream.is_empty() {
return Err(GetStreamError::new(GetStreamErrorKind::EmptyName));
}
if !is_valid_name(stream) {
return Err(GetStreamError::new(GetStreamErrorKind::InvalidStreamName));
}
let subject = format!("STREAM.INFO.{stream}");
let request: Response<Info> = self
.request(subject, &())
.await
.map_err(|err| GetStreamError::with_source(GetStreamErrorKind::Request, err))?;
match request {
Response::Err { error } => {
Err(GetStreamError::new(GetStreamErrorKind::JetStream(error)))
}
Response::Ok(info) => Ok(Stream {
context: self.clone(),
info,
name: stream.to_string(),
}),
}
}
/// Create a stream with the given configuration on the server if it is not present. Returns a handle to the stream on the server.
///
/// Note: This does not validate if the Stream on the server is compatible with the configuration passed in.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use async_nats::jetstream::stream::Config;
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let stream = jetstream
/// .get_or_create_stream(Config {
/// name: "events".to_string(),
/// max_messages: 10_000,
/// ..Default::default()
/// })
/// .await?;
/// # Ok(())
/// # }
/// ```
pub async fn get_or_create_stream<S>(
&self,
stream_config: S,
) -> Result<Stream, CreateStreamError>
where
S: Into<Config>,
{
let config: Config = stream_config.into();
if config.name.is_empty() {
return Err(CreateStreamError::new(
CreateStreamErrorKind::EmptyStreamName,
));
}
if !is_valid_name(config.name.as_str()) {
return Err(CreateStreamError::new(
CreateStreamErrorKind::InvalidStreamName,
));
}
let subject = format!("STREAM.INFO.{}", config.name);
let request: Response<Info> = self.request(subject, &()).await?;
match request {
Response::Err { error } if error.code() == 404 => self.create_stream(&config).await,
Response::Err { error } => Err(error.into()),
Response::Ok(info) => Ok(Stream {
context: self.clone(),
info,
name: config.name,
}),
}
}
/// Deletes a [Stream] with a given name.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use async_nats::jetstream::stream::Config;
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let stream = jetstream.delete_stream("events").await?;
/// # Ok(())
/// # }
/// ```
pub async fn delete_stream<T: AsRef<str>>(
&self,
stream: T,
) -> Result<DeleteStatus, DeleteStreamError> {
let stream = stream.as_ref();
if stream.is_empty() {
return Err(DeleteStreamError::new(DeleteStreamErrorKind::EmptyName));
}
if !is_valid_name(stream) {
return Err(DeleteStreamError::new(
DeleteStreamErrorKind::InvalidStreamName,
));
}
let subject = format!("STREAM.DELETE.{stream}");
match self
.request(subject, &json!({}))
.await
.map_err(|err| DeleteStreamError::with_source(DeleteStreamErrorKind::Request, err))?
{
Response::Err { error } => Err(DeleteStreamError::new(
DeleteStreamErrorKind::JetStream(error),
)),
Response::Ok(delete_response) => Ok(delete_response),
}
}
/// Updates a [Stream] with a given config. If specific field cannot be updated,
/// error is returned.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use async_nats::jetstream::stream::Config;
/// use async_nats::jetstream::stream::DiscardPolicy;
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let stream = jetstream
/// .update_stream(&Config {
/// name: "events".to_string(),
/// discard: DiscardPolicy::New,
/// max_messages: 50_000,
/// ..Default::default()
/// })
/// .await?;
/// # Ok(())
/// # }
/// ```
pub async fn update_stream<S>(&self, config: S) -> Result<Info, UpdateStreamError>
where
S: Borrow<Config>,
{
let config = config.borrow();
if config.name.is_empty() {
return Err(CreateStreamError::new(
CreateStreamErrorKind::EmptyStreamName,
));
}
if !is_valid_name(config.name.as_str()) {
return Err(CreateStreamError::new(
CreateStreamErrorKind::InvalidStreamName,
));
}
let subject = format!("STREAM.UPDATE.{}", config.name);
match self.request(subject, config).await? {
Response::Err { error } => Err(error.into()),
Response::Ok(info) => Ok(info),
}
}
/// Looks up Stream that contains provided subject.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use futures::TryStreamExt;
/// let client = async_nats::connect("demo.nats.io:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
/// let stream_name = jetstream.stream_by_subject("foo.>");
/// # Ok(())
/// # }
/// ```
pub async fn stream_by_subject<T: Into<String>>(
&self,
subject: T,
) -> Result<String, GetStreamByNameError> {
let subject = subject.into();
if !is_valid_subject(subject.as_str()) {
return Err(GetStreamByNameError::new(
GetStreamByNameErrorKind::InvalidSubject,
));
}
let mut names = StreamNames {
context: self.clone(),
offset: 0,
page_request: None,
streams: Vec::new(),
subject: Some(subject),
done: false,
};
match names.next().await {
Some(name) => match name {
Ok(name) => Ok(name),
Err(err) => Err(GetStreamByNameError::with_source(
GetStreamByNameErrorKind::Request,
err,
)),
},
None => Err(GetStreamByNameError::new(
GetStreamByNameErrorKind::NotFound,
)),
}
}
/// Lists names of all streams for current context.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use futures::TryStreamExt;
/// let client = async_nats::connect("demo.nats.io:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
/// let mut names = jetstream.stream_names();
/// while let Some(stream) = names.try_next().await? {
/// println!("stream: {}", stream);
/// }
/// # Ok(())
/// # }
/// ```
pub fn stream_names(&self) -> StreamNames {
StreamNames {
context: self.clone(),
offset: 0,
page_request: None,
streams: Vec::new(),
subject: None,
done: false,
}
}
/// Lists all streams info for current context.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use futures::TryStreamExt;
/// let client = async_nats::connect("demo.nats.io:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
/// let mut streams = jetstream.streams();
/// while let Some(stream) = streams.try_next().await? {
/// println!("stream: {:?}", stream);
/// }
/// # Ok(())
/// # }
/// ```
pub fn streams(&self) -> Streams {
Streams {
context: self.clone(),
offset: 0,
page_request: None,
streams: Vec::new(),
done: false,
}
}
/// Returns an existing key-value bucket.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("demo.nats.io:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
/// let kv = jetstream.get_key_value("bucket").await?;
/// # Ok(())
/// # }
/// ```
pub async fn get_key_value<T: Into<String>>(&self, bucket: T) -> Result<Store, KeyValueError> {
let bucket: String = bucket.into();
if !crate::jetstream::kv::is_valid_bucket_name(&bucket) {
return Err(KeyValueError::new(KeyValueErrorKind::InvalidStoreName));
}
let stream_name = format!("KV_{}", &bucket);
let stream = self
.get_stream(stream_name.clone())
.map_err(|err| KeyValueError::with_source(KeyValueErrorKind::GetBucket, err))
.await?;
if stream.info.config.max_messages_per_subject < 1 {
return Err(KeyValueError::new(KeyValueErrorKind::InvalidStoreName));
}
let mut store = Store {
prefix: format!("$KV.{}.", &bucket),
name: bucket,
stream_name,
stream: stream.clone(),
put_prefix: None,
use_jetstream_prefix: self.prefix != "$JS.API",
};
if let Some(ref mirror) = stream.info.config.mirror {
let bucket = mirror.name.trim_start_matches("KV_");
if let Some(ref external) = mirror.external {
if !external.api_prefix.is_empty() {
store.use_jetstream_prefix = false;
store.prefix = format!("$KV.{bucket}.");
store.put_prefix = Some(format!("{}.$KV.{}.", external.api_prefix, bucket));
} else {
store.put_prefix = Some(format!("$KV.{bucket}."));
}
}
};
Ok(store)
}
/// Creates a new key-value bucket.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("demo.nats.io:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
/// let kv = jetstream
/// .create_key_value(async_nats::jetstream::kv::Config {
/// bucket: "kv".to_string(),
/// history: 10,
/// ..Default::default()
/// })
/// .await?;
/// # Ok(())
/// # }
/// ```
pub async fn create_key_value(
&self,
mut config: crate::jetstream::kv::Config,
) -> Result<Store, CreateKeyValueError> {
if !crate::jetstream::kv::is_valid_bucket_name(&config.bucket) {
return Err(CreateKeyValueError::new(
CreateKeyValueErrorKind::InvalidStoreName,
));
}
let history = if config.history > 0 {
if config.history > MAX_HISTORY {
return Err(CreateKeyValueError::new(
CreateKeyValueErrorKind::TooLongHistory,
));
}
config.history
} else {
1
};
let num_replicas = if config.num_replicas == 0 {
1
} else {
config.num_replicas
};
let mut subjects = Vec::new();
if let Some(ref mut mirror) = config.mirror {
if !mirror.name.starts_with("KV_") {
mirror.name = format!("KV_{}", mirror.name);
}
config.mirror_direct = true;
} else if let Some(ref mut sources) = config.sources {
for source in sources {
if !source.name.starts_with("KV_") {
source.name = format!("KV_{}", source.name);
}
}
} else {
subjects = vec![format!("$KV.{}.>", config.bucket)];
}
let stream = self
.create_stream(stream::Config {
name: format!("KV_{}", config.bucket),
description: Some(config.description),
subjects,
max_messages_per_subject: history,
max_bytes: config.max_bytes,
max_age: config.max_age,
max_message_size: config.max_value_size,
storage: config.storage,
republish: config.republish,
allow_rollup: true,
deny_delete: true,
deny_purge: false,
allow_direct: true,
sources: config.sources,
mirror: config.mirror,
num_replicas,
discard: stream::DiscardPolicy::New,
mirror_direct: config.mirror_direct,
#[cfg(feature = "server_2_10")]
compression: if config.compression {
Some(stream::Compression::S2)
} else {
None
},
placement: config.placement,
..Default::default()
})
.await
.map_err(|err| {
if err.kind() == CreateStreamErrorKind::TimedOut {
CreateKeyValueError::with_source(CreateKeyValueErrorKind::TimedOut, err)
} else {
CreateKeyValueError::with_source(CreateKeyValueErrorKind::BucketCreate, err)
}
})?;
let mut store = Store {
prefix: format!("$KV.{}.", &config.bucket),
name: config.bucket,
stream: stream.clone(),
stream_name: stream.info.config.name,
put_prefix: None,
use_jetstream_prefix: self.prefix != "$JS.API",
};
if let Some(ref mirror) = stream.info.config.mirror {
let bucket = mirror.name.trim_start_matches("KV_");
if let Some(ref external) = mirror.external {
if !external.api_prefix.is_empty() {
store.use_jetstream_prefix = false;
store.prefix = format!("$KV.{bucket}.");
store.put_prefix = Some(format!("{}.$KV.{}.", external.api_prefix, bucket));
} else {
store.put_prefix = Some(format!("$KV.{bucket}."));
}
}
};
Ok(store)
}
/// Deletes given key-value bucket.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("demo.nats.io:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
/// let kv = jetstream
/// .create_key_value(async_nats::jetstream::kv::Config {
/// bucket: "kv".to_string(),
/// history: 10,
/// ..Default::default()
/// })
/// .await?;
/// # Ok(())
/// # }
/// ```
pub async fn delete_key_value<T: AsRef<str>>(
&self,
bucket: T,
) -> Result<DeleteStatus, KeyValueError> {
if !crate::jetstream::kv::is_valid_bucket_name(bucket.as_ref()) {
return Err(KeyValueError::new(KeyValueErrorKind::InvalidStoreName));
}
let stream_name = format!("KV_{}", bucket.as_ref());
self.delete_stream(stream_name)
.map_err(|err| KeyValueError::with_source(KeyValueErrorKind::JetStream, err))
.await
}
// pub async fn update_key_value<C: Borrow<kv::Config>>(&self, config: C) -> Result<(), crate::Error> {
// let config = config.borrow();
// if !crate::jetstream::kv::is_valid_bucket_name(&config.bucket) {
// return Err(Box::new(std::io::Error::new(
// ErrorKind::Other,
// "invalid bucket name",
// )));
// }
// let stream_name = format!("KV_{}", config.bucket);
// self.update_stream()
// .await
// .and_then(|info| Ok(()))
// }
/// Get a [crate::jetstream::consumer::Consumer] straight from [Context], without binding to a [Stream] first.
///
/// It has one less interaction with the server when binding to only one
/// [crate::jetstream::consumer::Consumer].
///
/// # Examples:
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use async_nats::jetstream::consumer::PullConsumer;
///
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let consumer: PullConsumer = jetstream
/// .get_consumer_from_stream("consumer", "stream")
/// .await?;
///
/// # Ok(())
/// # }
/// ```
pub async fn get_consumer_from_stream<T, C, S>(
&self,
consumer: C,
stream: S,
) -> Result<Consumer<T>, ConsumerError>
where
T: FromConsumer + IntoConsumerConfig,
S: AsRef<str>,
C: AsRef<str>,
{
if !is_valid_name(stream.as_ref()) {
return Err(ConsumerError::with_source(
ConsumerErrorKind::InvalidName,
"invalid stream",
));
}
if !is_valid_name(consumer.as_ref()) {
return Err(ConsumerError::new(ConsumerErrorKind::InvalidName));
}
let subject = format!("CONSUMER.INFO.{}.{}", stream.as_ref(), consumer.as_ref());
let info: super::consumer::Info = match self.request(subject, &json!({})).await? {
Response::Ok(info) => info,
Response::Err { error } => return Err(error.into()),
};
Ok(Consumer::new(
T::try_from_consumer_config(info.config.clone()).map_err(|err| {
ConsumerError::with_source(ConsumerErrorKind::InvalidConsumerType, err)
})?,
info,
self.clone(),
))
}
/// Delete a [crate::jetstream::consumer::Consumer] straight from [Context], without binding to a [Stream] first.
///
/// It has one less interaction with the server when binding to only one
/// [crate::jetstream::consumer::Consumer].
///
/// # Examples:
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use async_nats::jetstream::consumer::PullConsumer;
///
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// jetstream
/// .delete_consumer_from_stream("consumer", "stream")
/// .await?;
///
/// # Ok(())
/// # }
/// ```
pub async fn delete_consumer_from_stream<C: AsRef<str>, S: AsRef<str>>(
&self,
consumer: C,
stream: S,
) -> Result<DeleteStatus, ConsumerError> {
if !is_valid_name(consumer.as_ref()) {
return Err(ConsumerError::new(ConsumerErrorKind::InvalidName));
}
if !is_valid_name(stream.as_ref()) {
return Err(ConsumerError::with_source(
ConsumerErrorKind::Other,
"invalid stream name",
));
}
let subject = format!("CONSUMER.DELETE.{}.{}", stream.as_ref(), consumer.as_ref());
match self.request(subject, &json!({})).await? {
Response::Ok(delete_status) => Ok(delete_status),
Response::Err { error } => Err(error.into()),
}
}
/// Create or update a `Durable` or `Ephemeral` Consumer (if `durable_name` was not provided) and
/// returns the info from the server about created [Consumer] without binding to a [Stream] first.
/// If you want a strict update or create, use [Context::create_consumer_strict_on_stream] or [Context::update_consumer_on_stream].
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use async_nats::jetstream::consumer;
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let consumer: consumer::PullConsumer = jetstream
/// .create_consumer_on_stream(
/// consumer::pull::Config {
/// durable_name: Some("pull".to_string()),
/// ..Default::default()
/// },
/// "stream",
/// )
/// .await?;
/// # Ok(())
/// # }
/// ```
pub async fn create_consumer_on_stream<C: IntoConsumerConfig + FromConsumer, S: AsRef<str>>(
&self,
config: C,
stream: S,
) -> Result<Consumer<C>, ConsumerError> {
self.create_consumer_on_stream_action(config, stream, ConsumerAction::CreateOrUpdate)
.await
}
/// Update an existing consumer.
/// This call will fail if the consumer does not exist.
/// returns the info from the server about updated [Consumer] without binding to a [Stream] first.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use async_nats::jetstream::consumer;
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let consumer: consumer::PullConsumer = jetstream
/// .update_consumer_on_stream(
/// consumer::pull::Config {
/// durable_name: Some("pull".to_string()),
/// description: Some("updated pull consumer".to_string()),
/// ..Default::default()
/// },
/// "stream",
/// )
/// .await?;
/// # Ok(())
/// # }
/// ```
#[cfg(feature = "server_2_10")]
pub async fn update_consumer_on_stream<C: IntoConsumerConfig + FromConsumer, S: AsRef<str>>(
&self,
config: C,
stream: S,
) -> Result<Consumer<C>, ConsumerUpdateError> {
self.create_consumer_on_stream_action(config, stream, ConsumerAction::Update)
.await
.map_err(|err| err.into())
}
/// Create consumer on stream, but only if it does not exist or the existing config is exactly
/// the same.
/// This method will fail if consumer is already present with different config.
/// returns the info from the server about created [Consumer] without binding to a [Stream] first.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// use async_nats::jetstream::consumer;
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let consumer: consumer::PullConsumer = jetstream
/// .create_consumer_strict_on_stream(
/// consumer::pull::Config {
/// durable_name: Some("pull".to_string()),
/// ..Default::default()
/// },
/// "stream",
/// )
/// .await?;
/// # Ok(())
/// # }
/// ```
#[cfg(feature = "server_2_10")]
pub async fn create_consumer_strict_on_stream<
C: IntoConsumerConfig + FromConsumer,
S: AsRef<str>,
>(
&self,
config: C,
stream: S,
) -> Result<Consumer<C>, ConsumerCreateStrictError> {
self.create_consumer_on_stream_action(config, stream, ConsumerAction::Create)
.await
.map_err(|err| err.into())
}
async fn create_consumer_on_stream_action<
C: IntoConsumerConfig + FromConsumer,
S: AsRef<str>,
>(
&self,
config: C,
stream: S,
action: ConsumerAction,
) -> Result<Consumer<C>, ConsumerError> {
let config = config.into_consumer_config();
let subject = {
let filter = if config.filter_subject.is_empty() {
"".to_string()
} else {
format!(".{}", config.filter_subject)
};
config
.name
.as_ref()
.or(config.durable_name.as_ref())
.map(|name| format!("CONSUMER.CREATE.{}.{}{}", stream.as_ref(), name, filter))
.unwrap_or_else(|| format!("CONSUMER.CREATE.{}", stream.as_ref()))
};
match self
.request(
subject,
&json!({"stream_name": stream.as_ref(), "config": config, "action": action}),
)
.await?
{
Response::Err { error } => Err(ConsumerError::new(ConsumerErrorKind::JetStream(error))),
Response::Ok::<consumer::Info>(info) => Ok(Consumer::new(
FromConsumer::try_from_consumer_config(info.clone().config)
.map_err(|err| ConsumerError::with_source(ConsumerErrorKind::Other, err))?,
info,
self.clone(),
)),
}
}
/// Send a request to the jetstream JSON API.
///
/// This is a low level API used mostly internally, that should be used only in
/// specific cases when this crate API on [Consumer] or [Stream] does not provide needed functionality.
///
/// # Examples
///
/// ```no_run
/// # use async_nats::jetstream::stream::Info;
/// # use async_nats::jetstream::response::Response;
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("localhost:4222").await?;
/// let jetstream = async_nats::jetstream::new(client);
///
/// let response: Response<Info> = jetstream.request("STREAM.INFO.events", &()).await?;
/// # Ok(())
/// # }
/// ```
pub async fn request<S, T, V>(&self, subject: S, payload: &T) -> Result<V, RequestError>
where
S: ToSubject,
T: ?Sized + Serialize,
V: DeserializeOwned,
{
let subject = subject.to_subject();
let request = serde_json::to_vec(&payload)
.map(Bytes::from)
.map_err(|err| RequestError::with_source(RequestErrorKind::Other, err))?;
debug!("JetStream request sent: {:?}", request);
let message = self
.client
.request(format!("{}.{}", self.prefix, subject.as_ref()), request)
.await;
let message = message?;
debug!(
"JetStream request response: {:?}",
from_utf8(&message.payload)
);
let response = serde_json::from_slice(message.payload.as_ref())
.map_err(|err| RequestError::with_source(RequestErrorKind::Other, err))?;
Ok(response)
}
/// Creates a new object store bucket.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("demo.nats.io").await?;
/// let jetstream = async_nats::jetstream::new(client);
/// let bucket = jetstream
/// .create_object_store(async_nats::jetstream::object_store::Config {
/// bucket: "bucket".to_string(),
/// ..Default::default()
/// })
/// .await?;
/// # Ok(())
/// # }
/// ```
pub async fn create_object_store(
&self,
config: super::object_store::Config,
) -> Result<super::object_store::ObjectStore, CreateObjectStoreError> {
if !super::object_store::is_valid_bucket_name(&config.bucket) {
return Err(CreateObjectStoreError::new(
CreateKeyValueErrorKind::InvalidStoreName,
));
}
let bucket_name = config.bucket.clone();
let stream_name = format!("OBJ_{bucket_name}");
let chunk_subject = format!("$O.{bucket_name}.C.>");
let meta_subject = format!("$O.{bucket_name}.M.>");
let stream = self
.create_stream(super::stream::Config {
name: stream_name,
description: config.description.clone(),
subjects: vec![chunk_subject, meta_subject],
max_age: config.max_age,
max_bytes: config.max_bytes,
storage: config.storage,
num_replicas: config.num_replicas,
discard: DiscardPolicy::New,
allow_rollup: true,
allow_direct: true,
#[cfg(feature = "server_2_10")]
compression: if config.compression {
Some(Compression::S2)
} else {
None
},
placement: config.placement,
..Default::default()
})
.await
.map_err(|err| {
CreateObjectStoreError::with_source(CreateKeyValueErrorKind::BucketCreate, err)
})?;
Ok(ObjectStore {
name: bucket_name,
stream,
})
}
/// Get an existing object store bucket.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("demo.nats.io").await?;
/// let jetstream = async_nats::jetstream::new(client);
/// let bucket = jetstream.get_object_store("bucket").await?;
/// # Ok(())
/// # }
/// ```
pub async fn get_object_store<T: AsRef<str>>(
&self,
bucket_name: T,
) -> Result<ObjectStore, ObjectStoreError> {
let bucket_name = bucket_name.as_ref();
if !is_valid_bucket_name(bucket_name) {
return Err(ObjectStoreError::new(
ObjectStoreErrorKind::InvalidBucketName,
));
}
let stream_name = format!("OBJ_{bucket_name}");
let stream = self
.get_stream(stream_name)
.await
.map_err(|err| ObjectStoreError::with_source(ObjectStoreErrorKind::GetStore, err))?;
Ok(ObjectStore {
name: bucket_name.to_string(),
stream,
})
}
/// Delete a object store bucket.
///
/// # Examples
///
/// ```no_run
/// # #[tokio::main]
/// # async fn main() -> Result<(), async_nats::Error> {
/// let client = async_nats::connect("demo.nats.io").await?;
/// let jetstream = async_nats::jetstream::new(client);
/// let bucket = jetstream.delete_object_store("bucket").await?;
/// # Ok(())
/// # }
/// ```
pub async fn delete_object_store<T: AsRef<str>>(
&self,
bucket_name: T,
) -> Result<(), DeleteObjectStore> {
let stream_name = format!("OBJ_{}", bucket_name.as_ref());
self.delete_stream(stream_name)
.await
.map_err(|err| ObjectStoreError::with_source(ObjectStoreErrorKind::GetStore, err))?;
Ok(())
}
}
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum PublishErrorKind {
StreamNotFound,
WrongLastMessageId,
WrongLastSequence,
TimedOut,
BrokenPipe,
Other,
}
impl Display for PublishErrorKind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::StreamNotFound => write!(f, "no stream found for given subject"),
Self::TimedOut => write!(f, "timed out: didn't receive ack in time"),
Self::Other => write!(f, "publish failed"),
Self::BrokenPipe => write!(f, "broken pipe"),
Self::WrongLastMessageId => write!(f, "wrong last message id"),
Self::WrongLastSequence => write!(f, "wrong last sequence"),
}
}
}
pub type PublishError = Error<PublishErrorKind>;
#[derive(Debug)]
pub struct PublishAckFuture {
timeout: Duration,
subscription: oneshot::Receiver<Message>,
}
impl PublishAckFuture {
async fn next_with_timeout(self) -> Result<PublishAck, PublishError> {
let next = tokio::time::timeout(self.timeout, self.subscription)
.await
.map_err(|_| PublishError::new(PublishErrorKind::TimedOut))?;
next.map_or_else(
|_| Err(PublishError::new(PublishErrorKind::BrokenPipe)),
|m| {
if m.status == Some(StatusCode::NO_RESPONDERS) {
return Err(PublishError::new(PublishErrorKind::StreamNotFound));
}
let response = serde_json::from_slice(m.payload.as_ref())
.map_err(|err| PublishError::with_source(PublishErrorKind::Other, err))?;
match response {
Response::Err { error } => match error.error_code() {
ErrorCode::STREAM_WRONG_LAST_MESSAGE_ID => Err(PublishError::with_source(
PublishErrorKind::WrongLastMessageId,
error,
)),
ErrorCode::STREAM_WRONG_LAST_SEQUENCE => Err(PublishError::with_source(
PublishErrorKind::WrongLastSequence,
error,
)),
_ => Err(PublishError::with_source(PublishErrorKind::Other, error)),
},
Response::Ok(publish_ack) => Ok(publish_ack),
}
},
)
}
}
impl IntoFuture for PublishAckFuture {
type Output = Result<PublishAck, PublishError>;
type IntoFuture = Pin<Box<dyn Future<Output = Result<PublishAck, PublishError>> + Send>>;
fn into_future(self) -> Self::IntoFuture {
Box::pin(std::future::IntoFuture::into_future(
self.next_with_timeout(),
))
}
}
#[derive(Deserialize, Debug)]
struct StreamPage {
total: usize,
streams: Option<Vec<String>>,
}
#[derive(Deserialize, Debug)]
struct StreamInfoPage {
total: usize,
streams: Option<Vec<super::stream::Info>>,
}
type PageRequest = BoxFuture<'static, Result<StreamPage, RequestError>>;
pub struct StreamNames {
context: Context,
offset: usize,
page_request: Option<PageRequest>,
subject: Option<String>,
streams: Vec<String>,
done: bool,
}
impl futures::Stream for StreamNames {
type Item = Result<String, StreamsError>;
fn poll_next(
mut self: Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<Option<Self::Item>> {
match self.page_request.as_mut() {
Some(page) => match page.try_poll_unpin(cx) {
std::task::Poll::Ready(page) => {
self.page_request = None;
let page = page
.map_err(|err| StreamsError::with_source(StreamsErrorKind::Other, err))?;
if let Some(streams) = page.streams {
self.offset += streams.len();
self.streams = streams;
if self.offset >= page.total {
self.done = true;
}
match self.streams.pop() {
Some(stream) => Poll::Ready(Some(Ok(stream))),
None => Poll::Ready(None),
}
} else {
Poll::Ready(None)
}
}
std::task::Poll::Pending => std::task::Poll::Pending,
},
None => {
if let Some(stream) = self.streams.pop() {
Poll::Ready(Some(Ok(stream)))
} else {
if self.done {
return Poll::Ready(None);
}
let context = self.context.clone();
let offset = self.offset;
let subject = self.subject.clone();
self.page_request = Some(Box::pin(async move {
match context
.request(
"STREAM.NAMES",
&json!({
"offset": offset,
"subject": subject
}),
)
.await?
{
Response::Err { error } => {
Err(RequestError::with_source(RequestErrorKind::Other, error))
}
Response::Ok(page) => Ok(page),
}
}));
self.poll_next(cx)
}
}
}
}
}
type PageInfoRequest = BoxFuture<'static, Result<StreamInfoPage, RequestError>>;
pub type StreamsErrorKind = RequestErrorKind;
pub type StreamsError = RequestError;
pub struct Streams {
context: Context,
offset: usize,
page_request: Option<PageInfoRequest>,
streams: Vec<super::stream::Info>,
done: bool,
}
impl futures::Stream for Streams {
type Item = Result<super::stream::Info, StreamsError>;
fn poll_next(
mut self: Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<Option<Self::Item>> {
match self.page_request.as_mut() {
Some(page) => match page.try_poll_unpin(cx) {
std::task::Poll::Ready(page) => {
self.page_request = None;
let page = page
.map_err(|err| StreamsError::with_source(StreamsErrorKind::Other, err))?;
if let Some(streams) = page.streams {
self.offset += streams.len();
self.streams = streams;
if self.offset >= page.total {
self.done = true;
}
match self.streams.pop() {
Some(stream) => Poll::Ready(Some(Ok(stream))),
None => Poll::Ready(None),
}
} else {
Poll::Ready(None)
}
}
std::task::Poll::Pending => std::task::Poll::Pending,
},
None => {
if let Some(stream) = self.streams.pop() {
Poll::Ready(Some(Ok(stream)))
} else {
if self.done {
return Poll::Ready(None);
}
let context = self.context.clone();
let offset = self.offset;
self.page_request = Some(Box::pin(async move {
match context
.request(
"STREAM.LIST",
&json!({
"offset": offset,
}),
)
.await?
{
Response::Err { error } => {
Err(RequestError::with_source(RequestErrorKind::Other, error))
}
Response::Ok(page) => Ok(page),
}
}));
self.poll_next(cx)
}
}
}
}
}
/// Used for building customized `publish` message.
#[derive(Default, Clone, Debug)]
pub struct Publish {
payload: Bytes,
headers: Option<header::HeaderMap>,
}
impl Publish {
/// Creates a new custom Publish struct to be used with.
pub fn build() -> Self {
Default::default()
}
/// Sets the payload for the message.
pub fn payload(mut self, payload: Bytes) -> Self {
self.payload = payload;
self
}
/// Adds headers to the message.
pub fn headers(mut self, headers: HeaderMap) -> Self {
self.headers = Some(headers);
self
}
/// A shorthand to add a single header.
pub fn header<N: IntoHeaderName, V: IntoHeaderValue>(mut self, name: N, value: V) -> Self {
self.headers
.get_or_insert(header::HeaderMap::new())
.insert(name, value);
self
}
/// Sets the `Nats-Msg-Id` header, that is used by stream deduplicate window.
pub fn message_id<T: AsRef<str>>(self, id: T) -> Self {
self.header(header::NATS_MESSAGE_ID, id.as_ref())
}
/// Sets expected last message ID.
/// It sets the `Nats-Expected-Last-Msg-Id` header with provided value.
pub fn expected_last_message_id<T: AsRef<str>>(self, last_message_id: T) -> Self {
self.header(
header::NATS_EXPECTED_LAST_MESSAGE_ID,
last_message_id.as_ref(),
)
}
/// Sets the last expected stream sequence.
/// It sets the `Nats-Expected-Last-Sequence` header with provided value.
pub fn expected_last_sequence(self, last_sequence: u64) -> Self {
self.header(
header::NATS_EXPECTED_LAST_SEQUENCE,
HeaderValue::from(last_sequence),
)
}
/// Sets the last expected stream sequence for a subject this message will be published to.
/// It sets the `Nats-Expected-Last-Subject-Sequence` header with provided value.
pub fn expected_last_subject_sequence(self, subject_sequence: u64) -> Self {
self.header(
header::NATS_EXPECTED_LAST_SUBJECT_SEQUENCE,
HeaderValue::from(subject_sequence),
)
}
/// Sets the expected stream name.
/// It sets the `Nats-Expected-Stream` header with provided value.
pub fn expected_stream<T: AsRef<str>>(self, stream: T) -> Self {
self.header(
header::NATS_EXPECTED_STREAM,
HeaderValue::from(stream.as_ref()),
)
}
}
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum RequestErrorKind {
NoResponders,
TimedOut,
Other,
}
impl Display for RequestErrorKind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::TimedOut => write!(f, "timed out"),
Self::Other => write!(f, "request failed"),
Self::NoResponders => write!(f, "requested JetStream resource does not exist"),
}
}
}
pub type RequestError = Error<RequestErrorKind>;
impl From<crate::RequestError> for RequestError {
fn from(error: crate::RequestError) -> Self {
match error.kind() {
crate::RequestErrorKind::TimedOut => {
RequestError::with_source(RequestErrorKind::TimedOut, error)
}
crate::RequestErrorKind::NoResponders => {
RequestError::new(RequestErrorKind::NoResponders)
}
crate::RequestErrorKind::Other => {
RequestError::with_source(RequestErrorKind::Other, error)
}
}
}
}
impl From<super::errors::Error> for RequestError {
fn from(err: super::errors::Error) -> Self {
RequestError::with_source(RequestErrorKind::Other, err)
}
}
#[derive(Clone, Debug, PartialEq)]
pub enum CreateStreamErrorKind {
EmptyStreamName,
InvalidStreamName,
DomainAndExternalSet,
JetStreamUnavailable,
JetStream(super::errors::Error),
TimedOut,
Response,
ResponseParse,
}
impl Display for CreateStreamErrorKind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::EmptyStreamName => write!(f, "stream name cannot be empty"),
Self::InvalidStreamName => write!(f, "stream name cannot contain `.`, `_`"),
Self::DomainAndExternalSet => write!(f, "domain and external are both set"),
Self::JetStream(err) => write!(f, "jetstream error: {}", err),
Self::TimedOut => write!(f, "jetstream request timed out"),
Self::JetStreamUnavailable => write!(f, "jetstream unavailable"),
Self::ResponseParse => write!(f, "failed to parse server response"),
Self::Response => write!(f, "response error"),
}
}
}
pub type CreateStreamError = Error<CreateStreamErrorKind>;
impl From<super::errors::Error> for CreateStreamError {
fn from(error: super::errors::Error) -> Self {
CreateStreamError::new(CreateStreamErrorKind::JetStream(error))
}
}
impl From<RequestError> for CreateStreamError {
fn from(error: RequestError) -> Self {
match error.kind() {
RequestErrorKind::NoResponders => {
CreateStreamError::new(CreateStreamErrorKind::JetStreamUnavailable)
}
RequestErrorKind::TimedOut => CreateStreamError::new(CreateStreamErrorKind::TimedOut),
RequestErrorKind::Other => {
CreateStreamError::with_source(CreateStreamErrorKind::Response, error)
}
}
}
}
#[derive(Clone, Debug, PartialEq)]
pub enum GetStreamErrorKind {
EmptyName,
Request,
InvalidStreamName,
JetStream(super::errors::Error),
}
impl Display for GetStreamErrorKind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::EmptyName => write!(f, "empty name cannot be empty"),
Self::Request => write!(f, "request error"),
Self::InvalidStreamName => write!(f, "invalid stream name"),
Self::JetStream(err) => write!(f, "jetstream error: {}", err),
}
}
}
#[derive(Clone, Debug, PartialEq)]
pub enum GetStreamByNameErrorKind {
Request,
NotFound,
InvalidSubject,
JetStream(super::errors::Error),
}
impl Display for GetStreamByNameErrorKind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::Request => write!(f, "request error"),
Self::NotFound => write!(f, "stream not found"),
Self::InvalidSubject => write!(f, "invalid subject"),
Self::JetStream(err) => write!(f, "jetstream error: {}", err),
}
}
}
pub type GetStreamError = Error<GetStreamErrorKind>;
pub type GetStreamByNameError = Error<GetStreamByNameErrorKind>;
pub type UpdateStreamError = CreateStreamError;
pub type UpdateStreamErrorKind = CreateStreamErrorKind;
pub type DeleteStreamError = GetStreamError;
pub type DeleteStreamErrorKind = GetStreamErrorKind;
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum KeyValueErrorKind {
InvalidStoreName,
GetBucket,
JetStream,
}
impl Display for KeyValueErrorKind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::InvalidStoreName => write!(f, "invalid Key Value Store name"),
Self::GetBucket => write!(f, "failed to get the bucket"),
Self::JetStream => write!(f, "JetStream error"),
}
}
}
pub type KeyValueError = Error<KeyValueErrorKind>;
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum CreateKeyValueErrorKind {
InvalidStoreName,
TooLongHistory,
JetStream,
BucketCreate,
TimedOut,
}
impl Display for CreateKeyValueErrorKind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::InvalidStoreName => write!(f, "invalid Key Value Store name"),
Self::TooLongHistory => write!(f, "too long history"),
Self::JetStream => write!(f, "JetStream error"),
Self::BucketCreate => write!(f, "bucket creation failed"),
Self::TimedOut => write!(f, "timed out"),
}
}
}
pub type CreateKeyValueError = Error<CreateKeyValueErrorKind>;
pub type CreateObjectStoreError = CreateKeyValueError;
pub type CreateObjectStoreErrorKind = CreateKeyValueErrorKind;
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum ObjectStoreErrorKind {
InvalidBucketName,
GetStore,
}
impl Display for ObjectStoreErrorKind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::InvalidBucketName => write!(f, "invalid Object Store bucket name"),
Self::GetStore => write!(f, "failed to get Object Store"),
}
}
}
pub type ObjectStoreError = Error<ObjectStoreErrorKind>;
pub type DeleteObjectStore = ObjectStoreError;
pub type DeleteObjectStoreKind = ObjectStoreErrorKind;
#[derive(Clone, Debug, PartialEq)]
pub enum AccountErrorKind {
TimedOut,
JetStream(super::errors::Error),
JetStreamUnavailable,
Other,
}
impl Display for AccountErrorKind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::TimedOut => write!(f, "timed out"),
Self::JetStream(err) => write!(f, "JetStream error: {}", err),
Self::Other => write!(f, "error"),
Self::JetStreamUnavailable => write!(f, "JetStream unavailable"),
}
}
}
pub type AccountError = Error<AccountErrorKind>;
impl From<RequestError> for AccountError {
fn from(err: RequestError) -> Self {
match err.kind {
RequestErrorKind::NoResponders => {
AccountError::with_source(AccountErrorKind::JetStreamUnavailable, err)
}
RequestErrorKind::TimedOut => AccountError::new(AccountErrorKind::TimedOut),
RequestErrorKind::Other => AccountError::with_source(AccountErrorKind::Other, err),
}
}
}
#[derive(Clone, Debug, Serialize)]
enum ConsumerAction {
#[serde(rename = "")]
CreateOrUpdate,
#[serde(rename = "create")]
#[cfg(feature = "server_2_10")]
Create,
#[serde(rename = "update")]
#[cfg(feature = "server_2_10")]
Update,
}