8151c6e
use redis::RedisError;
pub type CacheResult<T> = Result<T, CacheError>;
#[derive(Debug)]
pub enum CacheError {
Config(String),
Backend(RedisError),
Encode {
key: String,
message: String,
},
Decode {
key: String,
message: String,
},
Unsupported {
feature: &'static str,
reason: &'static str,
},
Lock {
key: String,
message: String,
},
}
impl CacheError {
pub fn config(message: impl Into<String>) -> Self {
Self::Config(message.into())
}
pub fn encode(key: impl Into<String>, error: serde_json::Error) -> Self {
Self::Encode {
key: key.into(),
message: error.to_string(),
}
}
pub fn decode(key: impl Into<String>, error: serde_json::Error) -> Self {
Self::Decode {
key: key.into(),
message: error.to_string(),
}
}
pub fn unsupported(feature: &'static str, reason: &'static str) -> Self {
Self::Unsupported { feature, reason }
}
pub fn lock(key: impl Into<String>, message: impl Into<String>) -> Self {
Self::Lock {
key: key.into(),
message: message.into(),
}
}
pub fn key(&self) -> Option<&str> {
match self {
Self::Encode { key, .. } | Self::Decode { key, .. } | Self::Lock { key, .. } => {
Some(key)
}
_ => None,
}
}
pub fn is_config(&self) -> bool {
matches!(self, Self::Config(_))
}
pub fn is_closed(&self) -> bool {
match self {
Self::Backend(error) => error.is_connection_dropped(),
_ => false,
}
}
pub fn is_retryable(&self) -> bool {
match self {
Self::Backend(error) => {
error.is_io_error()
|| error.is_timeout()
|| error.is_connection_refusal()
|| error.is_connection_dropped()
|| error.is_cluster_error()
}
_ => false,
}
}
}
impl std::fmt::Display for CacheError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::Config(message) => write!(f, "cache config: {message}"),
Self::Backend(error) => write!(f, "cache backend: {error}"),
Self::Encode { key, message } => write!(f, "cache encode {key}: {message}"),
Self::Decode { key, message } => write!(f, "cache decode {key}: {message}"),
Self::Unsupported { feature, reason } => {
write!(f, "cache unsupported {feature}: {reason}")
}
Self::Lock { key, message } => write!(f, "cache lock {key}: {message}"),
}
}
}
impl std::error::Error for CacheError {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
match self {
Self::Backend(error) => Some(error),
_ => None,
}
}
}
impl From<RedisError> for CacheError {
fn from(error: RedisError) -> Self {
Self::Backend(error)
}
}