feat: with sled db

Signed-off-by: kjuulh <contact@kjuulh.io>

Cargo.lock

@@ -217,6 +217,21 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"
 
+[[package]]
+name = "capnp"
+version = "0.17.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95e65021d89250bbfe7c2791789ced2c4bdc21b0e8bb59c64f3fd6145a5fd678"
+
+[[package]]
+name = "capnpc"
+version = "0.17.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fbbc3763fb3e6635188e9cc51ee11a26f8777c553ca377430818dbebaaf6042b"
+dependencies = [
+ "capnp",
+]
+
 [[package]]
 name = "cc"
 version = "1.0.79"
@@ -262,6 +277,17 @@ dependencies = [
  "tracing-subscriber",
 ]
 
+[[package]]
+name = "churn-capnp"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "capnp",
+ "capnpc",
+ "churn-domain",
+ "uuid",
+]
+
 [[package]]
 name = "churn-domain"
 version = "0.1.0"
@@ -283,12 +309,15 @@ name = "churn-server"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "async-trait",
  "axum",
+ "churn-capnp",
  "churn-domain",
  "clap",
  "dotenv",
  "serde",
  "serde_json",
+ "sled",
  "tokio",
  "tracing",
  "tracing-subscriber",
@@ -400,6 +429,28 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae211234986c545741a7dc064309f67ee1e5ad243d0e48335adc0484d960bcc7"
+dependencies = [
+ "autocfg",
+ "cfg-if",
+ "crossbeam-utils",
+ "memoffset",
+ "scopeguard",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a22b2d63d4d1dc0b7f1b6b2747dd0088008a9be28b6ddf0b1e7d335e3037294"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "crypto-common"
 version = "0.1.6"
@@ -671,6 +722,16 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fs2"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9564fc758e15025b46aa6643b1b77d047d1a56a1aea6e01002ac0c7026876213"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "futures"
 version = "0.3.28"
@@ -760,6 +821,15 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "fxhash"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c31b6d751ae2c7f11320402d34e41349dd1016f8d5d45e48c4312bc8625af50c"
+dependencies = [
+ "byteorder",
+]
+
 [[package]]
 name = "generic-array"
 version = "0.14.7"
@@ -1021,6 +1091,15 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "io-lifetimes"
 version = "1.0.11"
@@ -1117,6 +1196,15 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
+[[package]]
+name = "memoffset"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a634b1c61a95585bd15607c6ab0c4e5b226e695ff2800ba0cdccddf208c406c"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -1246,6 +1334,17 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
 
+[[package]]
+name = "parking_lot"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d17b78036a60663b797adeaee46f5c9dfebb86948d1255007a1d6be0271ff99"
+dependencies = [
+ "instant",
+ "lock_api",
+ "parking_lot_core 0.8.6",
+]
+
 [[package]]
 name = "parking_lot"
 version = "0.12.1"
@@ -1253,7 +1352,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
 dependencies = [
  "lock_api",
- "parking_lot_core",
+ "parking_lot_core 0.9.8",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60a2cfe6f0ad2bfc16aefa463b497d5c7a5ecd44a23efa72aa342d90177356dc"
+dependencies = [
+ "cfg-if",
+ "instant",
+ "libc",
+ "redox_syscall 0.2.16",
+ "smallvec",
+ "winapi",
 ]
 
 [[package]]
@@ -1643,6 +1756,22 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "sled"
+version = "0.34.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f96b4737c2ce5987354855aed3797279def4ebf734436c6aa4552cf8e169935"
+dependencies = [
+ "crc32fast",
+ "crossbeam-epoch",
+ "crossbeam-utils",
+ "fs2",
+ "fxhash",
+ "libc",
+ "log",
+ "parking_lot 0.11.2",
+]
+
 [[package]]
 name = "smallvec"
 version = "1.10.0"
@@ -1789,7 +1918,7 @@ dependencies = [
  "libc",
  "mio",
  "num_cpus",
- "parking_lot",
+ "parking_lot 0.12.1",
  "pin-project-lite",
  "signal-hook-registry",
  "socket2 0.5.3",

Cargo.toml

@@ -17,6 +17,7 @@ churn = { path = "crates/churn" }
 churn-agent = { path = "crates/churn-agent" }
 churn-server = { path = "crates/churn-server" }
 churn-domain = { path = "crates/churn-domain", version = "0.1.0" }
+churn-capnp = { path = "crates/churn-capnp", version = "0.1.0" }
 
 anyhow = { version = "1.0.71" }
 tokio = { version = "1", features = ["full"] }
@@ -30,3 +31,5 @@ serde = {version = "1", features = ["derive"]}
 serde_json = "1"
 reqwest = {version = "0.11.20", features = ["json"]}
 uuid = {version = "1.4.1", features = ["v4", "serde"]}
+
+sled = "0.34.7"

crates/churn-capnp/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "churn-capnp"
+repository.workspace = true
+description.workspace = true
+readme.workspace = true
+license-file.workspace = true
+authors.workspace = true
+version.workspace = true
+edition.workspace = true
+publish.workspace = true
+
+[dependencies]
+churn-domain.workspace = true
+uuid.workspace = true
+anyhow.workspace = true
+
+capnp = "0.17.2"
+
+[build-dependencies]
+capnpc = "0.17.2"

crates/churn-capnp/build.rs

@@ -0,0 +1,10 @@
+extern crate capnpc;
+
+fn main() {
+    capnpc::CompilerCommand::new()
+        .output_path("src/")
+        .src_prefix("schemas/")
+        .file("schemas/models.capnp")
+        .run()
+        .unwrap();
+}

crates/churn-capnp/schemas/models.capnp

@@ -0,0 +1,7 @@
+@0xf23adf24ffd8aca4;
+
+struct LogEvent {
+  id @0 :Text;
+  author @1 :Text;
+  content @2 :Text;
+}

crates/churn-capnp/src/lib.rs

@@ -0,0 +1,59 @@
+use capnp::message::{Builder, HeapAllocator};
+use capnp::message::{ReaderOptions, TypedReader};
+use capnp::serialize::{self, OwnedSegments};
+
+use capnp::traits::{FromPointerReader, Owned};
+use churn_domain::LogEvent;
+
+mod models_capnp;
+
+pub trait CapnpPackExt {
+    type Return;
+
+    fn serialize_capnp(&self) -> String;
+    fn deserialize_capnp(content: &str) -> anyhow::Result<Self::Return>;
+
+    fn capnp_to_string(builder: &Builder<HeapAllocator>) -> String {
+        let msg = serialize::write_message_to_words(builder);
+        std::str::from_utf8(msg.as_slice())
+            .expect("to be able to parse capnp as utf8")
+            .to_string()
+    }
+
+    fn string_to_capnp<'a, S>(content: &'a str) -> TypedReader<OwnedSegments, S>
+    where
+        S: Owned,
+    {
+        let log_event = serialize::read_message(content.as_bytes(), ReaderOptions::new()).unwrap();
+
+        let log_event = log_event.into_typed::<S>();
+
+        log_event
+    }
+}
+
+impl CapnpPackExt for LogEvent {
+    type Return = Self;
+
+    fn serialize_capnp(&self) -> String {
+        let mut builder = Builder::new_default();
+
+        let mut log_event = builder.init_root::<models_capnp::log_event::Builder>();
+        log_event.set_id(&self.id.to_string());
+        log_event.set_author(&self.author);
+        log_event.set_content(&self.content);
+
+        Self::capnp_to_string(&builder)
+    }
+
+    fn deserialize_capnp(content: &str) -> anyhow::Result<Self> {
+        let log_event = Self::string_to_capnp::<models_capnp::log_event::Owned>(content);
+        let log_event = log_event.get()?;
+
+        Ok(Self {
+            id: uuid::Uuid::parse_str(log_event.get_id()?)?,
+            author: log_event.get_author()?.into(),
+            content: log_event.get_content()?.into(),
+        })
+    }
+}

crates/churn-capnp/src/models_capnp.rs

@@ -0,0 +1,288 @@
+// @generated by the capnpc-rust plugin to the Cap'n Proto schema compiler.
+// DO NOT EDIT.
+// source: models.capnp
+
+
+pub mod log_event {
+  #[derive(Copy, Clone)]
+  pub struct Owned(());
+  impl ::capnp::introspect::Introspect for Owned { fn introspect() -> ::capnp::introspect::Type { ::capnp::introspect::TypeVariant::Struct(::capnp::introspect::RawBrandedStructSchema { generic: &_private::RAW_SCHEMA, field_types: _private::get_field_types, annotation_types: _private::get_annotation_types }).into() } }
+  impl ::capnp::traits::Owned for Owned { type Reader<'a> = Reader<'a>; type Builder<'a> = Builder<'a>; }
+  impl ::capnp::traits::OwnedStruct for Owned { type Reader<'a> = Reader<'a>; type Builder<'a> = Builder<'a>; }
+  impl ::capnp::traits::Pipelined for Owned { type Pipeline = Pipeline; }
+
+  pub struct Reader<'a> { reader: ::capnp::private::layout::StructReader<'a> }
+  impl <'a,> ::core::marker::Copy for Reader<'a,>  {}
+  impl <'a,> ::core::clone::Clone for Reader<'a,>  {
+    fn clone(&self) -> Self { *self }
+  }
+
+  impl <'a,> ::capnp::traits::HasTypeId for Reader<'a,>  {
+    const TYPE_ID: u64 = _private::TYPE_ID;
+  }
+  impl <'a,> ::core::convert::From<::capnp::private::layout::StructReader<'a>> for Reader<'a,>  {
+    fn from(reader: ::capnp::private::layout::StructReader<'a>) -> Self {
+      Self { reader,  }
+    }
+  }
+
+  impl <'a,> ::core::convert::From<Reader<'a,>> for ::capnp::dynamic_value::Reader<'a>  {
+    fn from(reader: Reader<'a,>) -> Self {
+      Self::Struct(::capnp::dynamic_struct::Reader::new(reader.reader, ::capnp::schema::StructSchema::new(::capnp::introspect::RawBrandedStructSchema { generic: &_private::RAW_SCHEMA, field_types: _private::get_field_types::<>, annotation_types: _private::get_annotation_types::<>})))
+    }
+  }
+
+  impl <'a,> ::core::fmt::Debug for Reader<'a,>  {
+    fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>) -> ::core::result::Result<(), ::core::fmt::Error> {
+      core::fmt::Debug::fmt(&::core::convert::Into::<::capnp::dynamic_value::Reader<'_>>::into(*self), f)
+    }
+  }
+
+  impl <'a,> ::capnp::traits::FromPointerReader<'a> for Reader<'a,>  {
+    fn get_from_pointer(reader: &::capnp::private::layout::PointerReader<'a>, default: ::core::option::Option<&'a [::capnp::Word]>) -> ::capnp::Result<Self> {
+      ::core::result::Result::Ok(reader.get_struct(default)?.into())
+    }
+  }
+
+  impl <'a,> ::capnp::traits::IntoInternalStructReader<'a> for Reader<'a,>  {
+    fn into_internal_struct_reader(self) -> ::capnp::private::layout::StructReader<'a> {
+      self.reader
+    }
+  }
+
+  impl <'a,> ::capnp::traits::Imbue<'a> for Reader<'a,>  {
+    fn imbue(&mut self, cap_table: &'a ::capnp::private::layout::CapTable) {
+      self.reader.imbue(::capnp::private::layout::CapTableReader::Plain(cap_table))
+    }
+  }
+
+  impl <'a,> Reader<'a,>  {
+    pub fn reborrow(&self) -> Reader<'_,> {
+      Self { .. *self }
+    }
+
+    pub fn total_size(&self) -> ::capnp::Result<::capnp::MessageSize> {
+      self.reader.total_size()
+    }
+    #[inline]
+    pub fn get_id(self) -> ::capnp::Result<::capnp::text::Reader<'a>> {
+      ::capnp::traits::FromPointerReader::get_from_pointer(&self.reader.get_pointer_field(0), ::core::option::Option::None)
+    }
+    #[inline]
+    pub fn has_id(&self) -> bool {
+      !self.reader.get_pointer_field(0).is_null()
+    }
+    #[inline]
+    pub fn get_author(self) -> ::capnp::Result<::capnp::text::Reader<'a>> {
+      ::capnp::traits::FromPointerReader::get_from_pointer(&self.reader.get_pointer_field(1), ::core::option::Option::None)
+    }
+    #[inline]
+    pub fn has_author(&self) -> bool {
+      !self.reader.get_pointer_field(1).is_null()
+    }
+    #[inline]
+    pub fn get_content(self) -> ::capnp::Result<::capnp::text::Reader<'a>> {
+      ::capnp::traits::FromPointerReader::get_from_pointer(&self.reader.get_pointer_field(2), ::core::option::Option::None)
+    }
+    #[inline]
+    pub fn has_content(&self) -> bool {
+      !self.reader.get_pointer_field(2).is_null()
+    }
+  }
+
+  pub struct Builder<'a> { builder: ::capnp::private::layout::StructBuilder<'a> }
+  impl <'a,> ::capnp::traits::HasStructSize for Builder<'a,>  {
+    const STRUCT_SIZE: ::capnp::private::layout::StructSize = ::capnp::private::layout::StructSize { data: 0, pointers: 3 };
+  }
+  impl <'a,> ::capnp::traits::HasTypeId for Builder<'a,>  {
+    const TYPE_ID: u64 = _private::TYPE_ID;
+  }
+  impl <'a,> ::core::convert::From<::capnp::private::layout::StructBuilder<'a>> for Builder<'a,>  {
+    fn from(builder: ::capnp::private::layout::StructBuilder<'a>) -> Self {
+      Self { builder,  }
+    }
+  }
+
+  impl <'a,> ::core::convert::From<Builder<'a,>> for ::capnp::dynamic_value::Builder<'a>  {
+    fn from(builder: Builder<'a,>) -> Self {
+      Self::Struct(::capnp::dynamic_struct::Builder::new(builder.builder, ::capnp::schema::StructSchema::new(::capnp::introspect::RawBrandedStructSchema { generic: &_private::RAW_SCHEMA, field_types: _private::get_field_types::<>, annotation_types: _private::get_annotation_types::<>})))
+    }
+  }
+
+  impl <'a,> ::capnp::traits::ImbueMut<'a> for Builder<'a,>  {
+    fn imbue_mut(&mut self, cap_table: &'a mut ::capnp::private::layout::CapTable) {
+      self.builder.imbue(::capnp::private::layout::CapTableBuilder::Plain(cap_table))
+    }
+  }
+
+  impl <'a,> ::capnp::traits::FromPointerBuilder<'a> for Builder<'a,>  {
+    fn init_pointer(builder: ::capnp::private::layout::PointerBuilder<'a>, _size: u32) -> Self {
+      builder.init_struct(<Self as ::capnp::traits::HasStructSize>::STRUCT_SIZE).into()
+    }
+    fn get_from_pointer(builder: ::capnp::private::layout::PointerBuilder<'a>, default: ::core::option::Option<&'a [::capnp::Word]>) -> ::capnp::Result<Self> {
+      ::core::result::Result::Ok(builder.get_struct(<Self as ::capnp::traits::HasStructSize>::STRUCT_SIZE, default)?.into())
+    }
+  }
+
+  impl <'a,> ::capnp::traits::SetPointerBuilder for Reader<'a,>  {
+    fn set_pointer_builder(mut pointer: ::capnp::private::layout::PointerBuilder<'_>, value: Self, canonicalize: bool) -> ::capnp::Result<()> { pointer.set_struct(&value.reader, canonicalize) }
+  }
+
+  impl <'a,> Builder<'a,>  {
+    pub fn into_reader(self) -> Reader<'a,> {
+      self.builder.into_reader().into()
+    }
+    pub fn reborrow(&mut self) -> Builder<'_,> {
+      Builder { builder: self.builder.reborrow() }
+    }
+    pub fn reborrow_as_reader(&self) -> Reader<'_,> {
+      self.builder.as_reader().into()
+    }
+
+    pub fn total_size(&self) -> ::capnp::Result<::capnp::MessageSize> {
+      self.builder.as_reader().total_size()
+    }
+    #[inline]
+    pub fn get_id(self) -> ::capnp::Result<::capnp::text::Builder<'a>> {
+      ::capnp::traits::FromPointerBuilder::get_from_pointer(self.builder.get_pointer_field(0), ::core::option::Option::None)
+    }
+    #[inline]
+    pub fn set_id(&mut self, value: ::capnp::text::Reader<'_>)  {
+      self.builder.reborrow().get_pointer_field(0).set_text(value);
+    }
+    #[inline]
+    pub fn init_id(self, size: u32) -> ::capnp::text::Builder<'a> {
+      self.builder.get_pointer_field(0).init_text(size)
+    }
+    #[inline]
+    pub fn has_id(&self) -> bool {
+      !self.builder.is_pointer_field_null(0)
+    }
+    #[inline]
+    pub fn get_author(self) -> ::capnp::Result<::capnp::text::Builder<'a>> {
+      ::capnp::traits::FromPointerBuilder::get_from_pointer(self.builder.get_pointer_field(1), ::core::option::Option::None)
+    }
+    #[inline]
+    pub fn set_author(&mut self, value: ::capnp::text::Reader<'_>)  {
+      self.builder.reborrow().get_pointer_field(1).set_text(value);
+    }
+    #[inline]
+    pub fn init_author(self, size: u32) -> ::capnp::text::Builder<'a> {
+      self.builder.get_pointer_field(1).init_text(size)
+    }
+    #[inline]
+    pub fn has_author(&self) -> bool {
+      !self.builder.is_pointer_field_null(1)
+    }
+    #[inline]
+    pub fn get_content(self) -> ::capnp::Result<::capnp::text::Builder<'a>> {
+      ::capnp::traits::FromPointerBuilder::get_from_pointer(self.builder.get_pointer_field(2), ::core::option::Option::None)
+    }
+    #[inline]
+    pub fn set_content(&mut self, value: ::capnp::text::Reader<'_>)  {
+      self.builder.reborrow().get_pointer_field(2).set_text(value);
+    }
+    #[inline]
+    pub fn init_content(self, size: u32) -> ::capnp::text::Builder<'a> {
+      self.builder.get_pointer_field(2).init_text(size)
+    }
+    #[inline]
+    pub fn has_content(&self) -> bool {
+      !self.builder.is_pointer_field_null(2)
+    }
+  }
+
+  pub struct Pipeline { _typeless: ::capnp::any_pointer::Pipeline }
+  impl ::capnp::capability::FromTypelessPipeline for Pipeline {
+    fn new(typeless: ::capnp::any_pointer::Pipeline) -> Self {
+      Self { _typeless: typeless,  }
+    }
+  }
+  impl Pipeline  {
+  }
+  mod _private {
+    pub static ENCODED_NODE: [::capnp::Word; 62] = [
+      ::capnp::word(0, 0, 0, 0, 5, 0, 6, 0),
+      ::capnp::word(50, 25, 14, 89, 91, 12, 143, 231),
+      ::capnp::word(13, 0, 0, 0, 1, 0, 0, 0),
+      ::capnp::word(164, 172, 216, 255, 36, 223, 58, 242),
+      ::capnp::word(3, 0, 7, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(21, 0, 0, 0, 178, 0, 0, 0),
+      ::capnp::word(29, 0, 0, 0, 7, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(25, 0, 0, 0, 175, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(109, 111, 100, 101, 108, 115, 46, 99),
+      ::capnp::word(97, 112, 110, 112, 58, 76, 111, 103),
+      ::capnp::word(69, 118, 101, 110, 116, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 1, 0, 1, 0),
+      ::capnp::word(12, 0, 0, 0, 3, 0, 4, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 1, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(69, 0, 0, 0, 26, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(64, 0, 0, 0, 3, 0, 1, 0),
+      ::capnp::word(76, 0, 0, 0, 2, 0, 1, 0),
+      ::capnp::word(1, 0, 0, 0, 1, 0, 0, 0),
+      ::capnp::word(0, 0, 1, 0, 1, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(73, 0, 0, 0, 58, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(68, 0, 0, 0, 3, 0, 1, 0),
+      ::capnp::word(80, 0, 0, 0, 2, 0, 1, 0),
+      ::capnp::word(2, 0, 0, 0, 2, 0, 0, 0),
+      ::capnp::word(0, 0, 1, 0, 2, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(77, 0, 0, 0, 66, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(72, 0, 0, 0, 3, 0, 1, 0),
+      ::capnp::word(84, 0, 0, 0, 2, 0, 1, 0),
+      ::capnp::word(105, 100, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(12, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(12, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(97, 117, 116, 104, 111, 114, 0, 0),
+      ::capnp::word(12, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(12, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(99, 111, 110, 116, 101, 110, 116, 0),
+      ::capnp::word(12, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(12, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+      ::capnp::word(0, 0, 0, 0, 0, 0, 0, 0),
+    ];
+    pub fn get_field_types(index: u16) -> ::capnp::introspect::Type {
+      match index {
+        0 => <::capnp::text::Owned as ::capnp::introspect::Introspect>::introspect(),
+        1 => <::capnp::text::Owned as ::capnp::introspect::Introspect>::introspect(),
+        2 => <::capnp::text::Owned as ::capnp::introspect::Introspect>::introspect(),
+        _ => panic!("invalid field index {}", index),
+      }
+    }
+    pub fn get_annotation_types(child_index: Option<u16>, index: u32) -> ::capnp::introspect::Type {
+      panic!("invalid annotation indices ({:?}, {}) ", child_index, index)
+    }
+    pub static RAW_SCHEMA: ::capnp::introspect::RawStructSchema = ::capnp::introspect::RawStructSchema {
+      encoded_node: &ENCODED_NODE,
+      nonunion_members: NONUNION_MEMBERS,
+      members_by_discriminant: MEMBERS_BY_DISCRIMINANT,
+    };
+    pub static NONUNION_MEMBERS : &[u16] = &[0,1,2];
+    pub static MEMBERS_BY_DISCRIMINANT : &[u16] = &[];
+    pub const TYPE_ID: u64 = 0xe78f_0c5b_590e_1932;
+  }
+}

crates/churn-domain/src/lib.rs

@@ -23,3 +23,20 @@ pub struct ServerMonitorResp {
     pub cursor: Option<uuid::Uuid>,
     pub logs: Vec<String>,
 }
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct LogEvent {
+    pub id: uuid::Uuid,
+    pub author: String,
+    pub content: String,
+}
+
+impl LogEvent {
+    pub fn new(author: impl Into<String>, content: impl Into<String>) -> Self {
+        Self {
+            id: uuid::Uuid::new_v4(),
+            author: author.into(),
+            content: content.into(),
+        }
+    }
+}

crates/churn-server/Cargo.toml

@@ -11,6 +11,7 @@ publish.workspace = true
 
 [dependencies]
 churn-domain.workspace = true
+churn-capnp.workspace = true
 
 anyhow.workspace = true
 tokio.workspace = true
@@ -22,3 +23,6 @@ axum.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 uuid.workspace = true
+async-trait.workspace = true
+
+sled.workspace = true

crates/churn-server/src/db.rs

@@ -0,0 +1,79 @@
+use std::collections::HashMap;
+
+use std::path::{Path, PathBuf};
+use std::sync::Arc;
+
+use async_trait::async_trait;
+use churn_domain::ServerEnrollReq;
+use tokio::sync::Mutex;
+
+#[derive(Clone)]
+pub struct Db(Arc<dyn DbTrait + Send + Sync + 'static>);
+
+impl Db {
+    pub fn new_sled(path: &Path) -> Self {
+        Self(Arc::new(DefaultDb::new(path)))
+    }
+}
+
+impl std::ops::Deref for Db {
+    type Target = Arc<dyn DbTrait + Send + Sync + 'static>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl Default for Db {
+    fn default() -> Self {
+        Self(Arc::new(DefaultDb::default()))
+    }
+}
+
+struct DefaultDb {
+    db: sled::Db,
+}
+
+impl Default for DefaultDb {
+    fn default() -> Self {
+        Self::new(&PathBuf::from("churn-server.sled"))
+    }
+}
+
+impl DefaultDb {
+    pub fn new(path: &Path) -> Self {
+        Self {
+            db: sled::open(path).expect("to be able open a sled path"),
+        }
+    }
+}
+
+#[async_trait]
+pub trait DbTrait {
+    async fn insert(&self, namespace: &str, key: &str, value: &str) -> anyhow::Result<()>;
+    async fn get_all(&self, namespace: &str) -> anyhow::Result<Vec<String>>;
+}
+
+#[async_trait]
+impl DbTrait for DefaultDb {
+    async fn insert(&self, namespace: &str, key: &str, value: &str) -> anyhow::Result<()> {
+        let tree = self.db.open_tree(namespace)?;
+
+        tree.insert(key, value)?;
+
+        tree.flush_async().await?;
+
+        Ok(())
+    }
+
+    async fn get_all(&self, namespace: &str) -> anyhow::Result<Vec<String>> {
+        let tree = self.db.open_tree(namespace)?;
+
+        Ok(tree
+            .iter()
+            .flatten()
+            .map(|(_, val)| val)
+            .flat_map(|v| v.iter().map(|v| v.to_string()).collect::<Vec<String>>())
+            .collect::<Vec<_>>())
+    }
+}

crates/churn-server/src/event.rs

@@ -4,13 +4,23 @@ use std::sync::Arc;
 
 use axum::async_trait;
 
-use churn_domain::ServerEnrollReq;
+use churn_domain::{LogEvent, ServerEnrollReq};
 use serde::{ser::SerializeStruct, Deserialize, Serialize};
 use tokio::sync::{Mutex, RwLock};
 
+use churn_capnp::CapnpPackExt;
+
+use crate::db::Db;
+
 #[derive(Clone)]
 pub struct EventService(Arc<dyn EventServiceTrait + Send + Sync + 'static>);
 
+impl EventService {
+    pub fn new(db: Db) -> Self {
+        Self(Arc::new(DefaultEventService::new(db)))
+    }
+}
+
 impl std::ops::Deref for EventService {
     type Target = Arc<dyn EventServiceTrait + Send + Sync + 'static>;
 
@@ -27,23 +37,12 @@ impl Default for EventService {
 
 #[derive(Default)]
 struct DefaultEventService {
-    agents: Arc<RwLock<Vec<LogEvent>>>,
+    db: Db,
 }
 
-#[derive(Clone, Debug, Serialize, Deserialize)]
+impl DefaultEventService {
-pub struct LogEvent {
+    pub fn new(db: Db) -> Self {
-    pub id: uuid::Uuid,
+        Self { db }
-    pub author: String,
-    pub content: String,
-}
-
-impl LogEvent {
-    pub fn new(author: impl Into<String>, content: impl Into<String>) -> Self {
-        Self {
-            id: uuid::Uuid::new_v4(),
-            author: author.into(),
-            content: content.into(),
-        }
     }
 }
 
@@ -57,22 +56,34 @@ pub trait EventServiceTrait {
 #[async_trait]
 impl EventServiceTrait for DefaultEventService {
     async fn append(&self, req: LogEvent) -> anyhow::Result<()> {
-        let mut events = self.agents.write().await;
+        self.db
-        events.push(req);
+            .insert("events_log", &req.id.to_string(), &req.serialize_capnp())
+            .await;
+
         Ok(())
     }
     async fn get_from_cursor(&self, cursor: uuid::Uuid) -> anyhow::Result<Vec<LogEvent>> {
-        let events = self.agents.read().await;
+        let events = self.db.get_all("events_log").await?;
-        let items = events
+
+        let events = events
             .iter()
+            .map(|e| LogEvent::deserialize_capnp(e))
+            .flatten()
             .skip_while(|item| item.id != cursor)
             .skip(1)
-            .cloned()
+            .collect();
-            .collect::<Vec<_>>();
+
-        Ok(items)
+        Ok(events)
     }
     async fn get_from_beginning(&self) -> anyhow::Result<Vec<LogEvent>> {
-        let events = self.agents.read().await;
+        let events = self.db.get_all("events_log").await?;
-        Ok(events.iter().cloned().collect())
+
+        let events = events
+            .iter()
+            .map(|e| LogEvent::deserialize_capnp(e))
+            .flatten()
+            .collect();
+
+        Ok(events)
     }
 }

crates/churn-server/src/main.rs

@@ -1,8 +1,10 @@
 mod agent;
+mod db;
 mod event;
 mod lease;
 
 use std::net::SocketAddr;
+use std::path::PathBuf;
 
 use agent::AgentService;
 use anyhow::Error;
@@ -11,18 +13,37 @@ use axum::http::StatusCode;
 use axum::response::{IntoResponse, Response};
 use axum::routing::{get, post};
 use axum::{Json, Router};
-use churn_domain::{LeaseResp, ServerEnrollReq, ServerMonitorResp};
+use churn_domain::{LeaseResp, LogEvent, ServerEnrollReq, ServerMonitorResp};
-use clap::{Parser, Subcommand};
+use clap::{Args, Parser, Subcommand, ValueEnum};
-use event::{EventService, LogEvent};
+use event::EventService;
 use lease::LeaseService;
 use serde::{Deserialize, Serialize};
 use serde_json::json;
 
+use crate::db::Db;
+
 #[derive(Parser)]
 #[command(author, version, about, long_about = None, subcommand_required = true)]
 struct Command {
     #[command(subcommand)]
     command: Option<Commands>,
+
+    #[clap(flatten)]
+    global: GlobalArgs,
+}
+
+#[derive(Args)]
+struct GlobalArgs {
+    #[arg(env = "CHURN_DATABASE", long, default_value = "sled")]
+    database: DatabaseType,
+
+    #[arg(env = "CHURN_SLED_PATH", long, default_value = "churn-server.sled")]
+    sled_path: PathBuf,
+}
+
+#[derive(ValueEnum, Clone)]
+enum DatabaseType {
+    Sled,
 }
 
 #[derive(Subcommand)]
@@ -55,6 +76,9 @@ async fn main() -> anyhow::Result<()> {
     match cli.command {
         Some(Commands::Serve { host }) => {
             tracing::info!("Starting churn server");
+            let db = match cli.global.database {
+                DatabaseType::Sled => Db::new_sled(&cli.global.sled_path),
+            };
 
             let app = Router::new()
                 .route("/ping", get(ping))
@@ -70,7 +94,7 @@ async fn main() -> anyhow::Result<()> {
                 .with_state(AppState {
                     agent: AgentService::default(),
                     leases: LeaseService::default(),
-                    events: EventService::default(),
+                    events: EventService::new(db),
                 });
 
             tracing::info!("churn server listening on {}", host);