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use std::collections::HashMap;
use std::convert::TryInto;
use std::sync::{Arc, Mutex};
use super::CommitStore;
use crate::commits::store::{
error::{CommitEventError, CommitStoreError},
ChainRecord, Commit, CommitEvent,
};
use crate::commits::MAX_COMMIT_NUM;
use crate::error::InternalError;
#[derive(Clone, Default)]
pub struct MemoryCommitStore {
inner_commit: Arc<Mutex<HashMap<String, Commit>>>,
inner_cr: Arc<Mutex<HashMap<String, ChainRecord>>>,
}
impl MemoryCommitStore {
pub fn new() -> Self {
MemoryCommitStore {
inner_commit: Arc::new(Mutex::new(HashMap::new())),
inner_cr: Arc::new(Mutex::new(HashMap::new())),
}
}
}
impl CommitStore for MemoryCommitStore {
fn add_commit(&self, commit: Commit) -> Result<(), CommitStoreError> {
let mut inner_commit = self.inner_commit.lock().map_err(|_| {
CommitStoreError::InternalError(InternalError::with_message(
"Cannot access commits: mutex lock poisoned".to_string(),
))
})?;
inner_commit.insert(commit.commit_id.clone(), commit);
Ok(())
}
fn resolve_fork(&self, commit_num: i64) -> Result<(), CommitStoreError> {
let mut inner_commit = self.inner_commit.lock().map_err(|_| {
CommitStoreError::InternalError(InternalError::with_message(
"Cannot access commits: mutex lock poisoned".to_string(),
))
})?;
let mut inner_cr = self.inner_cr.lock().map_err(|_| {
CommitStoreError::InternalError(InternalError::with_message(
"Cannot access chain_records: mutex lock poisoned".to_string(),
))
})?;
inner_cr.retain(|_, v| v.start_commit_num.lt(&commit_num));
for (_, v) in inner_cr.iter_mut() {
if v.end_commit_num.ge(&commit_num) {
v.end_commit_num = MAX_COMMIT_NUM;
}
}
inner_commit.retain(|_, v| v.commit_num.lt(&commit_num));
Ok(())
}
fn get_commit_by_commit_num(
&self,
commit_num: i64,
) -> Result<Option<Commit>, CommitStoreError> {
let inner_commit = self.inner_commit.lock().map_err(|_| {
CommitStoreError::InternalError(InternalError::with_message(
"Cannot access commits: mutex lock poisoned".to_string(),
))
})?;
if let Some(commit) = inner_commit.get(&commit_num.to_string()) {
Ok(Some(commit.clone()))
} else {
Err(CommitStoreError::NotFoundError(format!(
"Commit with commit_num {} not found.",
commit_num
)))
}
}
fn get_current_commit_id(&self) -> Result<Option<String>, CommitStoreError> {
let inner_commit = self.inner_commit.lock().map_err(|_| {
CommitStoreError::InternalError(InternalError::with_message(
"Cannot access commits: mutex lock poisoned".to_string(),
))
})?;
if let Some(commit) = inner_commit.values().max_by_key(|v| v.commit_num) {
Ok(Some(commit.commit_id.clone()))
} else {
Err(CommitStoreError::NotFoundError(
"Commit not found".to_string(),
))
}
}
fn get_next_commit_num(&self) -> Result<i64, CommitStoreError> {
let inner_commit = self.inner_commit.lock().map_err(|_| {
CommitStoreError::InternalError(InternalError::with_message(
"Cannot access commits: mutex lock poisoned".to_string(),
))
})?;
if let Some(commit) = inner_commit.values().max_by_key(|v| v.commit_num) {
Ok(commit.commit_num + 1)
} else {
Ok(0)
}
}
fn create_db_commit_from_commit_event(
&self,
event: &CommitEvent,
) -> Result<Option<Commit>, CommitEventError> {
let inner_commit = self.inner_commit.lock().map_err(|_| {
CommitEventError::InternalError(InternalError::with_message(
"Cannot access commits: mutex lock poisoned".to_string(),
))
})?;
let commit_id = event.id.clone();
let commit_num = match event.height {
Some(height_u64) => height_u64.try_into().map_err(|err| {
CommitEventError::InternalError(InternalError::from_source(Box::new(err)))
})?,
None => {
if let Some(commit) = inner_commit.values().max_by_key(|v| v.commit_num) {
commit.commit_num + 1
} else {
0
}
}
};
let service_id = event.service_id.clone();
Ok(Some(Commit {
commit_id,
commit_num,
service_id,
}))
}
}