#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Serialize, Deserialize)]
pub struct Shard {
pub id: String,
pub role: ShardRole,
pub lag: Option<i64>,
pub last_op: i64,
}
impl Shard {
pub fn new<S>(id: S, role: ShardRole, lag: Option<i64>, last_op: i64) -> Shard
where S: Into<String>,
{
Shard {
id: id.into(),
role, lag, last_op,
}
}
}
#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Serialize, Deserialize)]
pub struct Shards {
pub shards: Vec<Shard>,
}
impl Shards {
pub fn new(shards: Vec<Shard>) -> Shards {
Shards { shards }
}
}
#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Serialize, Deserialize)]
pub enum ShardRole {
Primary,
Secondary,
Unknown(String)
}
#[cfg(test)]
mod tests {
use serde_json;
use super::Shard;
use super::ShardRole;
#[test]
fn primary_from_json() {
let payload = r#"{"id":"shard-1","role":"Primary","lag":0,"last_op":12345}"#;
let shard: Shard = serde_json::from_str(payload).unwrap();
let expected = Shard::new("shard-1", ShardRole::Primary, Some(0), 12345);
assert_eq!(shard, expected);
}
#[test]
fn primary_to_json() {
let shard = Shard::new("shard-1", ShardRole::Primary, Some(0), 12345);
let payload = serde_json::to_string(&shard).unwrap();
let expected = r#"{"id":"shard-1","role":"Primary","lag":0,"last_op":12345}"#;
assert_eq!(payload, expected);
}
#[test]
fn unkown_from_json() {
let payload = r#"{"id":"shard-1","role":{"Unknown":"Test"},"lag":0,"last_op":12345}"#;
let shard: Shard = serde_json::from_str(payload).unwrap();
let expected = Shard::new(
"shard-1", ShardRole::Unknown(String::from("Test")), Some(0), 12345
);
assert_eq!(shard, expected);
}
#[test]
fn unkown_to_json() {
let shard = Shard::new(
"shard-1", ShardRole::Unknown(String::from("Test")), Some(0), 12345
);
let payload = serde_json::to_string(&shard).unwrap();
let expected = r#"{"id":"shard-1","role":{"Unknown":"Test"},"lag":0,"last_op":12345}"#;
assert_eq!(payload, expected);
}
#[test]
fn missing_lag_from_json() {
let payload = r#"{"id":"shard-1","role":"Secondary","last_op":12345}"#;
let shard: Shard = serde_json::from_str(payload).unwrap();
let expected = Shard::new("shard-1", ShardRole::Secondary, None, 12345);
assert_eq!(shard, expected);
}
#[test]
fn no_lag_from_json() {
let payload = r#"{"id":"shard-1","role":"Secondary","lag":null,"last_op":12345}"#;
let shard: Shard = serde_json::from_str(payload).unwrap();
let expected = Shard::new("shard-1", ShardRole::Secondary, None, 12345);
assert_eq!(shard, expected);
}
#[test]
fn no_lag_to_json() {
let shard = Shard::new("shard-1", ShardRole::Primary, None, 12345);
let payload = serde_json::to_string(&shard).unwrap();
let expected = r#"{"id":"shard-1","role":"Primary","lag":null,"last_op":12345}"#;
assert_eq!(payload, expected);
}
}