Add massa event cache crate

Cargo.toml

@@ -43,6 +43,7 @@ members = [
   "massa-versioning",
   "massa-grpc",
   "massa-xtask",
+  "massa-event-cache",
 ]
 resolver = "2"
 
@@ -105,6 +106,7 @@ massa_test_framework = { path = "./massa-test-framework" }
 massa_time = { path = "./massa-time" }
 massa_versioning = { path = "./massa-versioning" }
 massa_wallet = { path = "./massa-wallet" }
+massa_event_cache = { path = "./massa-event-cache" }
 
 # Massa projects dependencies
 # massa-proto-rs = { git = "https://github.com/massalabs/massa-proto-rs", branch = "deferred_calls" }

_typos.toml

@@ -13,7 +13,8 @@ extend-ignore-re = [
     # Secret key (S): 18 - 62 characters
     # Public key (P): 18 - 62 characters
     # NodeId (N)
-    "(AU|AS|N|S|P)\\d\\w{18,62}",
+    # OperationId (O)
+    "(AU|AS|N|S|P|O)\\d\\w{18,62}",
 ]
 
 [default.extend-words]

massa-db-worker/src/lib.rs

@@ -35,7 +35,7 @@
 //! * if we want to delete item a: 1000 ^ 0011 == 1011 (== item b)
 //! * if we want to delete item b: 1000 ^ 1011 == 0011 (== item a)
 //!
-//! Note that this does not provides "Proof of present" nor "Proof of Absence"
+//! Note that this does not provide "Proof of present" nor "Proof of Absence"
 //! (operations avail with Merkle trees)
 //!
 //! For more details here: https://github.com/massalabs/massa/discussions/3852#discussioncomment-6188158
@@ -45,10 +45,10 @@
 //! # Caches
 //!
 //! A cache of db changes is kept in memory allowing to easily stream it
-//! (by streaming, we means: sending it to another massa node (aka bootstrap))
+//! (by streaming, we mean: sending it to another massa node (aka bootstrap))
 //! There is 2 separate caches: one for 'state' and one for 'versioning'
 //!
-//! These caches is stored as a key, value: slot -> insertion_data|deletion_data.
+//! These caches are stored as a key, value: slot -> insertion_data|deletion_data.
 //!
 //! # Streaming steps
 //!

massa-event-cache/Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "massa_event_cache"
+version = "0.1.0"
+edition = "2021"
+
+[features]
+test-exports = [
+    "massa_models/test-exports",
+    "mockall",
+    "mockall_wrap"
+]
+
+
+[dependencies]
+nom = {workspace = true}
+rocksdb = {workspace = true}
+tracing = {workspace = true}
+parking_lot = { workspace = true }
+num_enum = { workspace = true }
+massa_models = {workspace = true}
+massa_serialization = {workspace = true}
+massa_time = {workspace = true}
+mockall = {workspace = true, optional = true}
+mockall_wrap = {workspace = true, optional = true}
+
+[dev-dependencies]
+tempfile = {workspace = true}
+serial_test = {workspace = true}
+more-asserts = {workspace = true}
+rand = {workspace = true}
+mockall = {workspace = true}
+mockall_wrap = {workspace = true}
+massa_models = { workspace = true, features = ["test-exports"] }

massa-event-cache/src/config.rs

@@ -0,0 +1,22 @@
+use std::path::PathBuf;
+
+pub struct EventCacheConfig {
+    /// Path to the hard drive cache storage
+    pub event_cache_path: PathBuf,
+    /// Maximum number of entries we want to keep in the event cache
+    pub max_event_cache_length: usize,
+    /// Amount of entries removed when `event_cache_size` is reached
+    pub snip_amount: usize,
+    /// Maximum length of an event data (aka event message)
+    pub max_event_data_length: u64,
+    /// Thread count
+    pub thread_count: u8,
+    /// Call stack max length
+    pub max_call_stack_length: u16,
+    /// Maximum number of events per operation
+    pub max_events_per_operation: u64,
+    /// Maximum number of operations per block
+    pub max_operations_per_block: u64,
+    /// Maximum events returned in a query
+    pub max_events_per_query: usize,
+}

massa-event-cache/src/controller.rs

@@ -0,0 +1,136 @@
+// std
+use std::collections::{BTreeSet, VecDeque};
+use std::sync::Arc;
+// third-party
+use parking_lot::{Condvar, Mutex, RwLock};
+// internal
+use crate::event_cache::EventCache;
+use massa_models::execution::EventFilter;
+use massa_models::output_event::SCOutputEvent;
+
+/// structure used to communicate with controller
+#[derive(Debug, Default)]
+pub(crate) struct EventCacheWriterInputData {
+    /// set stop to true to stop the thread
+    pub stop: bool,
+    pub(crate) events: VecDeque<SCOutputEvent>,
+}
+
+impl EventCacheWriterInputData {
+    pub fn new() -> Self {
+        Self {
+            stop: Default::default(),
+            events: Default::default(),
+        }
+    }
+
+    /*
+    /// Takes the current input data into a clone that is returned,
+    /// and resets self.
+    pub fn take(&mut self) -> Self {
+        Self {
+            stop: std::mem::take(&mut self.stop),
+            events: std::mem::take(&mut self.events),
+        }
+    }
+    */
+}
+
+/// interface that communicates with the worker thread
+#[cfg_attr(feature = "test-exports", mockall_wrap::wrap, mockall::automock)]
+pub trait EventCacheController: Send + Sync {
+    fn save_events(&self, events: VecDeque<SCOutputEvent>);
+
+    fn get_filtered_sc_output_events(&self, filter: &EventFilter) -> Vec<SCOutputEvent>;
+}
+
+#[derive(Clone)]
+/// implementation of the event cache controller
+pub struct EventCacheControllerImpl {
+    /// input data to process in the VM loop
+    /// with a wake-up condition variable that needs to be triggered when the data changes
+    pub(crate) input_data: Arc<(Condvar, Mutex<EventCacheWriterInputData>)>,
+    /// Event cache
+    pub(crate) cache: Arc<RwLock<EventCache>>,
+}
+
+impl EventCacheController for EventCacheControllerImpl {
+    fn save_events(&self, events: VecDeque<SCOutputEvent>) {
+        // lock input data
+        let mut input_data = self.input_data.1.lock();
+        input_data.events.extend(events);
+        // wake up VM loop
+        self.input_data.0.notify_one();
+    }
+
+    fn get_filtered_sc_output_events(&self, filter: &EventFilter) -> Vec<SCOutputEvent> {
+        let mut res_0 = {
+            // Read from new events first
+            let lock_0 = self.input_data.1.lock();
+            #[allow(clippy::unnecessary_filter_map)]
+            let it = lock_0.events.iter().filter_map(|event| {
+                if let Some(start) = filter.start {
+                    if event.context.slot < start {
+                        return None;
+                    }
+                }
+                if let Some(end) = filter.end {
+                    if event.context.slot >= end {
+                        return None;
+                    }
+                }
+                if let Some(is_final) = filter.is_final {
+                    if event.context.is_final != is_final {
+                        return None;
+                    }
+                }
+                if let Some(is_error) = filter.is_error {
+                    if event.context.is_error != is_error {
+                        return None;
+                    }
+                }
+                match (
+                    filter.original_caller_address,
+                    event.context.call_stack.front(),
+                ) {
+                    (Some(addr1), Some(addr2)) if addr1 != *addr2 => return None,
+                    (Some(_), None) => return None,
+                    _ => (),
+                }
+                match (filter.emitter_address, event.context.call_stack.back()) {
+                    (Some(addr1), Some(addr2)) if addr1 != *addr2 => return None,
+                    (Some(_), None) => return None,
+                    _ => (),
+                }
+                match (
+                    filter.original_operation_id,
+                    event.context.origin_operation_id,
+                ) {
+                    (Some(addr1), Some(addr2)) if addr1 != addr2 => return None,
+                    (Some(_), None) => return None,
+                    _ => (),
+                }
+                Some(event)
+            });
+
+            let res_0: BTreeSet<SCOutputEvent> = it.cloned().collect();
+            // Drop the lock on the queue as soon as possible to avoid deadlocks
+            drop(lock_0);
+            res_0
+        };
+
+        let res_1 = {
+            // Read from db (on disk) events
+            let lock = self.cache.read();
+            let (_, res_1) = lock.get_filtered_sc_output_events(filter);
+            // Drop the lock on the event cache db asap
+            drop(lock);
+            res_1
+        };
+
+        // Merge results
+        let res_1: BTreeSet<SCOutputEvent> = BTreeSet::from_iter(res_1);
+        res_0.extend(res_1);
+        Vec::from_iter(res_0)
+    }
+}