Replication syncing

This commit is contained in:
Grisha Kruglov 2018-02-16 04:13:18 -05:00
parent 36d455150d
commit d9d2b3a89a
16 changed files with 431 additions and 96 deletions

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@ -16,8 +16,9 @@ version = "0.6.1"
build = "build/version.rs"
[features]
default = ["bundled_sqlite3"]
default = ["bundled_sqlite3", "syncable"]
bundled_sqlite3 = ["rusqlite/bundled"]
syncable = ["mentat_tolstoy"]
[workspace]
members = ["tools/cli"]
@ -78,6 +79,7 @@ path = "tx-parser"
[dependencies.mentat_tolstoy]
path = "tolstoy"
optional = true
[profile.release]
debug = true

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@ -1115,6 +1115,7 @@ pub trait PartitionMapping {
fn allocate_entid<S: ?Sized + Ord + Display>(&mut self, partition: &S) -> i64 where String: Borrow<S>;
fn allocate_entids<S: ?Sized + Ord + Display>(&mut self, partition: &S, n: usize) -> Range<i64> where String: Borrow<S>;
fn contains_entid(&self, entid: Entid) -> bool;
fn expand_up_to<S: ?Sized + Ord + Display>(&mut self, partition: &S, entid: i64) where String: Borrow<S>;
}
impl PartitionMapping for PartitionMap {
@ -1136,6 +1137,23 @@ impl PartitionMapping for PartitionMap {
}
}
fn expand_up_to<S: ?Sized + Ord + Display>(&mut self, partition: &S, entid: i64) where String: Borrow<S> {
match self.get_mut(partition) {
Some(partition) => {
// Don't honour requests to shrink the partition.
if partition.index > entid {
return ()
}
let new_index = entid + 1;
if partition.index != new_index {
partition.index = new_index;
}
},
// This is a programming error.
None => panic!("Cannot expand unknown partition: {}", partition),
}
}
fn contains_entid(&self, entid: Entid) -> bool {
self.values().any(|partition| partition.contains_entid(entid))
}

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@ -47,8 +47,7 @@ mod tx;
pub mod types;
mod upsert_resolution;
// Export these for reference from tests. cfg(test) should work, but doesn't.
// #[cfg(test)]
// Export these for reference from sync code and tests.
pub use bootstrap::{
TX0,
USER0,

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@ -52,6 +52,7 @@ use mentat_db::{
};
use mentat_db::internal_types::TermWithTempIds;
use mentat_db::db::PartitionMapping;
use mentat_tx;
@ -59,10 +60,6 @@ use mentat_tx::entities::TempId;
use mentat_tx_parser;
use mentat_tolstoy::Syncer;
use uuid::Uuid;
use entity_builder::{
InProgressBuilder,
};
@ -129,8 +126,8 @@ pub struct Conn {
/// A convenience wrapper around a single SQLite connection and a Conn. This is suitable
/// for applications that don't require complex connection management.
pub struct Store {
pub sqlite: rusqlite::Connection,
conn: Conn,
sqlite: rusqlite::Connection,
}
impl Store {
@ -157,6 +154,12 @@ impl Store {
sqlite: connection,
})
}
pub fn fast_forward_user_partition(&mut self, new_head: Entid) -> Result<()> {
let mut metadata = self.conn.metadata.lock().unwrap();
metadata.partition_map.expand_up_to(":db.part/user", new_head);
db::update_partition_map(&mut self.sqlite, &metadata.partition_map).map_err(|e| e.into())
}
}
pub trait Queryable {
@ -172,10 +175,6 @@ pub trait Queryable {
where E: Into<Entid>;
}
pub trait Syncable {
fn sync(&mut self, server_uri: &String, user_uuid: &String) -> Result<()>;
}
/// Represents an in-progress, not yet committed, set of changes to the store.
/// Call `commit` to commit your changes, or `rollback` to discard them.
/// A transaction is held open until you do so.
@ -493,13 +492,6 @@ pub enum CacheAction {
Deregister,
}
impl Syncable for Store {
fn sync(&mut self, server_uri: &String, user_uuid: &String) -> Result<()> {
let uuid = Uuid::parse_str(&user_uuid)?;
Ok(Syncer::flow(&mut self.sqlite, server_uri, &uuid)?)
}
}
impl Conn {
// Intentionally not public.
fn new(partition_map: PartitionMap, schema: Schema) -> Conn {

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@ -108,5 +108,10 @@ error_chain! {
description("provided value doesn't match value type")
display("provided value of type {} doesn't match attribute value type {}", provided, expected)
}
NotYetImplemented(t: String) {
description("not yet implemented")
display("not yet implemented: {}", t)
}
}
}

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@ -29,10 +29,12 @@ extern crate mentat_query_parser;
extern crate mentat_query_projector;
extern crate mentat_query_translator;
extern crate mentat_sql;
extern crate mentat_tolstoy;
extern crate mentat_tx;
extern crate mentat_tx_parser;
#[cfg(feature = "syncable")]
extern crate mentat_tolstoy;
pub use mentat_core::{
Attribute,
Entid,
@ -95,6 +97,13 @@ pub mod conn;
pub mod query;
pub mod entity_builder;
#[cfg(feature = "syncable")]
pub mod sync;
pub fn get_name() -> String {
return String::from("mentat");
}
pub use query::{
IntoResult,
PlainSymbol,
@ -115,7 +124,6 @@ pub use conn::{
InProgress,
Metadata,
Queryable,
Syncable,
Store,
};

133
src/sync.rs Normal file
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@ -0,0 +1,133 @@
// Copyright 2016 Mozilla
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
// this file except in compliance with the License. You may obtain a copy of the
// License at http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
use uuid::Uuid;
use conn::Store;
use errors::{
Result,
ErrorKind,
};
use mentat_core::{
Entid,
KnownEntid,
};
use mentat_db as db;
use entity_builder::BuildTerms;
use mentat_tolstoy::{
Syncer,
SyncMetadataClient,
TxMapper,
};
use mentat_tolstoy::syncer::{
Tx,
SyncResult,
};
use mentat_tolstoy::metadata::HeadTrackable;
pub trait Syncable {
fn sync(&mut self, server_uri: &String, user_uuid: &String) -> Result<()>;
fn fast_forward_local(&mut self, txs: Vec<Tx>) -> Result<()>;
}
fn within_user_partition(entid: Entid) -> bool {
entid >= db::USER0 && entid < db::TX0
}
impl Syncable for Store {
fn fast_forward_local(&mut self, txs: Vec<Tx>) -> Result<()> {
let mut last_tx_entid = None;
let mut last_tx_uuid = None;
// During fast-forwarding, we will insert datoms with known entids
// which, by definition, fall outside of our user partition.
// Once we've done with insertion, we need to ensure that user
// partition's next allocation will not overlap with just-inserted datoms.
// To allow for "holes" in the user partition (due to data excision),
// we track the highest incoming entid we saw, and expand our
// local partition to match.
// In absence of excision and implementation bugs, this should work
// just as if we counted number of incoming entids and expanded by
// that number instead.
let mut largest_endid_encountered = db::USER0;
for tx in txs {
let in_progress = self.begin_transaction()?;
let mut builder = in_progress.builder();
for part in tx.parts {
if part.added {
builder.add(KnownEntid(part.e), KnownEntid(part.a), part.v.clone())?;
} else {
builder.retract(KnownEntid(part.e), KnownEntid(part.a), part.v.clone())?;
}
// Ignore datoms that fall outside of the user partition:
if within_user_partition(part.e) && part.e > largest_endid_encountered {
largest_endid_encountered = part.e;
}
}
let report = builder.commit()?;
last_tx_entid = Some(report.tx_id);
last_tx_uuid = Some(tx.tx.clone());
}
// We've just transacted a new tx, and generated a new tx entid.
// Map it to the corresponding incoming tx uuid, advance our
// "locally known remote head".
if let Some(uuid) = last_tx_uuid {
if let Some(entid) = last_tx_entid {
{
let mut db_tx = self.sqlite.transaction()?;
SyncMetadataClient::set_remote_head(&mut db_tx, &uuid)?;
TxMapper::set_tx_uuid(&mut db_tx, entid, &uuid)?;
db_tx.commit()?;
}
// only need to advance the user partition, since we're using KnownEntid and partition won't
// get auto-updated; shouldn't be a problem for tx partition, since we're relying on the builder
// to create a tx and advance the partition for us.
self.fast_forward_user_partition(largest_endid_encountered)?;
}
}
Ok(())
}
fn sync(&mut self, server_uri: &String, user_uuid: &String) -> Result<()> {
let uuid = Uuid::parse_str(&user_uuid)?;
let sync_result;
{
let mut db_tx = self.sqlite.transaction()?;
sync_result = Syncer::flow(&mut db_tx, server_uri, &uuid)?;
// TODO this should be done _after_ all of the operations below conclude!
// Commits any changes Syncer made (schema, updated heads, tu mappings during an upload, etc)
db_tx.commit()?;
}
// TODO These operations need to borrow self as mutable; but we already borrow it for db_tx above,
// and so for now we split up sync into multiple db transactions /o\
// Fixing this likely involves either implementing flow on InProgress, or changing flow to
// take an InProgress instead of a raw sql transaction.
match sync_result {
SyncResult::EmptyServer => Ok(()),
SyncResult::NoChanges => Ok(()),
SyncResult::ServerFastForward => Ok(()),
SyncResult::Merge => bail!(ErrorKind::NotYetImplemented(
format!("Can't sync against diverged local.")
)),
SyncResult::LocalFastForward(txs) => self.fast_forward_local(txs)
}
}
}

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@ -97,12 +97,12 @@ fn test_reader() {
let mut conn = Conn::connect(&mut c).expect("Couldn't open DB.");
{
let db_tx = c.transaction().expect("db tx");
// Don't inspect the bootstrap transaction, but we'd like to see it's there.
// Ensure that the first (bootstrap) transaction is skipped over.
let mut receiver = TxCountingReceiver::new();
assert_eq!(false, receiver.is_done);
Processor::process(&db_tx, None, &mut receiver).expect("processor");
assert_eq!(true, receiver.is_done);
assert_eq!(1, receiver.tx_count);
assert_eq!(0, receiver.tx_count);
}
let ids = conn.transact(&mut c, r#"[
@ -112,7 +112,7 @@ fn test_reader() {
]"#).expect("successful transaction").tempids;
let numba_entity_id = ids.get("s").unwrap();
let mut bootstrap_tx = None;
let first_tx;
{
let db_tx = c.transaction().expect("db tx");
// Expect to see one more transaction of four parts (one for tx datom itself).
@ -121,10 +121,10 @@ fn test_reader() {
println!("{:#?}", receiver);
assert_eq!(2, receiver.txes.keys().count());
assert_tx_datoms_count(&receiver, 1, 4);
assert_eq!(1, receiver.txes.keys().count());
assert_tx_datoms_count(&receiver, 0, 4);
bootstrap_tx = Some(*receiver.txes.keys().nth(0).expect("bootstrap tx"));
first_tx = Some(*receiver.txes.keys().nth(0).expect("first tx"));
}
let ids = conn.transact(&mut c, r#"[
@ -138,14 +138,14 @@ fn test_reader() {
// Expect to see a single two part transaction
let mut receiver = TestingReceiver::new();
// Note that we're asking for the bootstrap tx to be skipped by the processor.
Processor::process(&db_tx, bootstrap_tx, &mut receiver).expect("processor");
// Note that we're asking for the first transacted tx to be skipped by the processor.
Processor::process(&db_tx, first_tx, &mut receiver).expect("processor");
assert_eq!(2, receiver.txes.keys().count());
assert_tx_datoms_count(&receiver, 1, 2);
assert_eq!(1, receiver.txes.keys().count());
assert_tx_datoms_count(&receiver, 0, 2);
// Inspect the transaction part.
let tx_id = receiver.txes.keys().nth(1).expect("tx");
let tx_id = receiver.txes.keys().nth(0).expect("tx");
let datoms = receiver.txes.get(tx_id).expect("datoms");
let part = &datoms[0];

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@ -49,11 +49,6 @@ error_chain! {
display("encountered unexpected state: {}", t)
}
NotYetImplemented(t: String) {
description("not yet implemented")
display("not yet implemented: {}", t)
}
DuplicateMetadata(k: String) {
description("encountered more than one metadata value for key")
display("encountered more than one metadata value for key: {}", k)

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@ -39,7 +39,9 @@ pub mod tx_processor;
pub mod errors;
pub mod syncer;
pub mod tx_mapper;
pub use tx_mapper::TxMapper;
pub use syncer::Syncer;
pub use metadata::SyncMetadataClient;
pub use errors::{
Error,
ErrorKind,

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@ -54,16 +54,16 @@ mod tests {
#[test]
fn test_get_remote_head_default() {
let mut conn = schema::tests::setup_conn();
let tx = conn.transaction().expect("db tx");
let mut conn = schema::tests::setup_conn_bare();
let tx = schema::tests::setup_tx(&mut conn);
assert_eq!(Uuid::nil(), SyncMetadataClient::remote_head(&tx).expect("fetch succeeded"));
}
#[test]
fn test_set_and_get_remote_head() {
let mut conn = schema::tests::setup_conn();
let mut conn = schema::tests::setup_conn_bare();
let tx = schema::tests::setup_tx(&mut conn);
let uuid = Uuid::new_v4();
let tx = conn.transaction().expect("db tx");
SyncMetadataClient::set_remote_head(&tx, &uuid).expect("update succeeded");
assert_eq!(uuid, SyncMetadataClient::remote_head(&tx).expect("fetch succeeded"));
}

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@ -24,15 +24,13 @@ lazy_static! {
};
}
pub fn ensure_current_version(conn: &mut rusqlite::Connection) -> Result<()> {
let tx = conn.transaction()?;
pub fn ensure_current_version(tx: &mut rusqlite::Transaction) -> Result<()> {
for statement in (&SCHEMA_STATEMENTS).iter() {
tx.execute(statement, &[])?;
}
tx.execute("INSERT OR IGNORE INTO tolstoy_metadata (key, value) VALUES (?, zeroblob(16))", &[&REMOTE_HEAD_KEY])?;
tx.commit().map_err(|e| e.into())
Ok(())
}
#[cfg(test)]
@ -40,7 +38,7 @@ pub mod tests {
use super::*;
use uuid::Uuid;
fn setup_conn_bare() -> rusqlite::Connection {
pub fn setup_conn_bare() -> rusqlite::Connection {
let conn = rusqlite::Connection::open_in_memory().unwrap();
conn.execute_batch("
@ -54,19 +52,24 @@ pub mod tests {
conn
}
pub fn setup_conn() -> rusqlite::Connection {
let mut conn = setup_conn_bare();
ensure_current_version(&mut conn).expect("connection setup");
conn
pub fn setup_tx_bare<'a>(conn: &'a mut rusqlite::Connection) -> rusqlite::Transaction<'a> {
conn.transaction().expect("tx")
}
pub fn setup_tx<'a>(conn: &'a mut rusqlite::Connection) -> rusqlite::Transaction<'a> {
let mut tx = conn.transaction().expect("tx");
ensure_current_version(&mut tx).expect("connection setup");
tx
}
#[test]
fn test_empty() {
let mut conn = setup_conn_bare();
let mut tx = setup_tx_bare(&mut conn);
assert!(ensure_current_version(&mut conn).is_ok());
assert!(ensure_current_version(&mut tx).is_ok());
let mut stmt = conn.prepare("SELECT key FROM tolstoy_metadata WHERE value = zeroblob(16)").unwrap();
let mut stmt = tx.prepare("SELECT key FROM tolstoy_metadata WHERE value = zeroblob(16)").unwrap();
let mut keys_iter = stmt.query_map(&[], |r| r.get(0)).expect("query works");
let first: Result<String> = keys_iter.next().unwrap().map_err(|e| e.into());
@ -82,27 +85,23 @@ pub mod tests {
#[test]
fn test_non_empty() {
let mut conn = setup_conn_bare();
let mut tx = setup_tx_bare(&mut conn);
assert!(ensure_current_version(&mut conn).is_ok());
assert!(ensure_current_version(&mut tx).is_ok());
let test_uuid = Uuid::new_v4();
{
let tx = conn.transaction().unwrap();
let uuid_bytes = test_uuid.as_bytes().to_vec();
match tx.execute("UPDATE tolstoy_metadata SET value = ? WHERE key = ?", &[&uuid_bytes, &REMOTE_HEAD_KEY]) {
Err(e) => panic!("Error running an update: {}", e),
_ => ()
}
match tx.commit() {
Err(e) => panic!("Error committing an update: {}", e),
_ => ()
}
}
assert!(ensure_current_version(&mut conn).is_ok());
assert!(ensure_current_version(&mut tx).is_ok());
// Check that running ensure_current_version on an initialized conn doesn't change anything.
let mut stmt = conn.prepare("SELECT value FROM tolstoy_metadata").unwrap();
let mut stmt = tx.prepare("SELECT value FROM tolstoy_metadata").unwrap();
let mut values_iter = stmt.query_map(&[], |r| {
let raw_uuid: Vec<u8> = r.get(0);
Uuid::from_bytes(raw_uuid.as_slice()).unwrap()

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@ -174,8 +174,23 @@ impl<'c> TxReceiver for UploadingTxReceiver<'c> {
}
}
// For returning out of the downloader as an ordered list.
#[derive(Debug)]
pub struct Tx {
pub tx: Uuid,
pub parts: Vec<TxPart>,
}
pub enum SyncResult {
EmptyServer,
NoChanges,
ServerFastForward,
LocalFastForward(Vec<Tx>),
Merge,
}
impl Syncer {
fn upload_ours(db_tx: &mut rusqlite::Transaction, from_tx: Option<Entid>, remote_client: &RemoteClient, remote_head: &Uuid) -> Result<()> {
fn fast_forward_server(db_tx: &mut rusqlite::Transaction, from_tx: Option<Entid>, remote_client: &RemoteClient, remote_head: &Uuid) -> Result<()> {
let mut uploader = UploadingTxReceiver::new(remote_client, remote_head);
Processor::process(db_tx, from_tx, &mut uploader)?;
if !uploader.is_done {
@ -197,19 +212,45 @@ impl Syncer {
Ok(())
}
pub fn flow(sqlite: &mut rusqlite::Connection, server_uri: &String, user_uuid: &Uuid) -> Result<()> {
fn download_theirs(_db_tx: &mut rusqlite::Transaction, remote_client: &RemoteClient, remote_head: &Uuid) -> Result<Vec<Tx>> {
let new_txs = remote_client.get_transactions(remote_head)?;
let mut tx_list = Vec::new();
for tx in new_txs {
let mut tx_parts = Vec::new();
let chunks = remote_client.get_chunks(&tx)?;
// We pass along all of the downloaded parts, including transaction's
// metadata datom. Transactor is expected to do the right thing, and
// use txInstant from one of our datoms.
for chunk in chunks {
let part = remote_client.get_chunk(&chunk)?;
tx_parts.push(part);
}
tx_list.push(Tx {
tx: tx,
parts: tx_parts
});
}
d(&format!("got tx list: {:?}", &tx_list));
Ok(tx_list)
}
pub fn flow(db_tx: &mut rusqlite::Transaction, server_uri: &String, user_uuid: &Uuid) -> Result<SyncResult> {
d(&format!("sync flowing"));
ensure_current_version(sqlite)?;
ensure_current_version(db_tx)?;
// TODO configure this sync with some auth data
let remote_client = RemoteClient::new(server_uri.clone(), user_uuid.clone());
let mut db_tx = sqlite.transaction()?;
let remote_head = remote_client.get_head()?;
d(&format!("remote head {:?}", remote_head));
let locally_known_remote_head = SyncMetadataClient::remote_head(&db_tx)?;
let locally_known_remote_head = SyncMetadataClient::remote_head(db_tx)?;
d(&format!("local head {:?}", locally_known_remote_head));
// Local head: latest transaction that we have in the store,
@ -220,24 +261,25 @@ impl Syncer {
let mut inquiring_tx_receiver = InquiringTxReceiver::new();
// TODO don't just start from the beginning... but then again, we should do this
// without walking the table at all, and use the tx index.
Processor::process(&db_tx, None, &mut inquiring_tx_receiver)?;
Processor::process(db_tx, None, &mut inquiring_tx_receiver)?;
if !inquiring_tx_receiver.is_done {
bail!(ErrorKind::TxProcessorUnfinished);
}
let have_local_changes = match inquiring_tx_receiver.last_tx {
let (have_local_changes, local_store_empty) = match inquiring_tx_receiver.last_tx {
Some(tx) => {
match TxMapper::get(&db_tx, tx)? {
Some(_) => false,
None => true
match TxMapper::get(db_tx, tx)? {
Some(_) => (false, false),
None => (true, false)
}
},
None => false
None => (false, true)
};
// Check if the server is empty - populate it.
if remote_head == Uuid::nil() {
d(&format!("empty server!"));
Syncer::upload_ours(&mut db_tx, None, &remote_client, &remote_head)?;
Syncer::fast_forward_server(db_tx, None, &remote_client, &remote_head)?;
return Ok(SyncResult::EmptyServer);
// Check if the server is the same as us, and if our HEAD moved.
} else if locally_known_remote_head == remote_head {
@ -245,36 +287,38 @@ impl Syncer {
if !have_local_changes {
d(&format!("local HEAD did not move. Nothing to do!"));
return Ok(());
return Ok(SyncResult::NoChanges);
}
d(&format!("local HEAD moved."));
// TODO it's possible that we've successfully advanced remote head previously,
// but failed to advance our own local head. If that's the case, and we can recognize it,
// our sync becomes just bumping our local head. AFAICT below would currently fail.
if let Some(upload_from_tx) = TxMapper::get_tx_for_uuid(&db_tx, &locally_known_remote_head)? {
if let Some(upload_from_tx) = TxMapper::get_tx_for_uuid(db_tx, &locally_known_remote_head)? {
d(&format!("Fast-forwarding the server."));
Syncer::upload_ours(&mut db_tx, Some(upload_from_tx), &remote_client, &remote_head)?;
Syncer::fast_forward_server(db_tx, Some(upload_from_tx), &remote_client, &remote_head)?;
return Ok(SyncResult::ServerFastForward);
} else {
d(&format!("Unable to fast-forward the server; missing local tx mapping"));
bail!(ErrorKind::TxIncorrectlyMapped(0));
}
// We diverged from the server.
// We'll need to rebase/merge ourselves on top of it.
// We diverged from the server. If we're lucky, we can just fast-forward local.
// Otherwise, a merge (or a rebase) is required.
} else {
d(&format!("server changed since last sync."));
bail!(ErrorKind::NotYetImplemented(
format!("Can't yet sync against changed server. Local head {:?}, remote head {:?}", locally_known_remote_head, remote_head)
// TODO local store moved forward since we last synced. Need to merge or rebase.
if !local_store_empty && have_local_changes {
return Ok(SyncResult::Merge);
}
d(&format!("fast-forwarding local store."));
return Ok(SyncResult::LocalFastForward(
Syncer::download_theirs(db_tx, &remote_client, &locally_known_remote_head)?
));
}
// Commit everything, if there's anything to commit!
// Any new tx->uuid mappings and the new HEAD. We're synced!
db_tx.commit()?;
Ok(())
// Our caller will commit the tx with our changes when it's done.
}
}
@ -289,9 +333,24 @@ struct SerializedTransaction<'a> {
chunks: &'a Vec<Uuid>
}
#[derive(Deserialize)]
struct DeserializableTransaction {
parent: Uuid,
chunks: Vec<Uuid>,
id: Uuid,
seq: i64,
}
#[derive(Deserialize)]
struct SerializedTransactions {
limit: i64,
from: Uuid,
transactions: Vec<Uuid>,
}
struct RemoteClient {
base_uri: String,
user_uuid: Uuid
user_uuid: Uuid,
}
@ -308,9 +367,14 @@ impl RemoteClient {
format!("{}/{}", self.base_uri, self.user_uuid)
}
// TODO what we want is a method that returns a deserialized json structure.
// It'll need a type T so that consumers can specify what downloaded json will
// map to. I ran into borrow issues doing that - probably need to restructure
// this and use PhantomData markers or somesuch.
// But for now, we get code duplication.
fn get_uuid(&self, uri: String) -> Result<Uuid> {
let mut core = Core::new()?;
// TODO enable TLS, see https://github.com/mozilla/mentat/issues/569
// TODO https://github.com/mozilla/mentat/issues/569
// let client = hyper::Client::configure()
// .connector(hyper_tls::HttpsConnector::new(4, &core.handle()).unwrap())
// .build(&core.handle());
@ -326,10 +390,10 @@ impl RemoteClient {
println!("Response: {}", res.status());
res.body().concat2().and_then(move |body| {
let head_json: SerializedHead = serde_json::from_slice(&body).map_err(|e| {
let json: SerializedHead = serde_json::from_slice(&body).map_err(|e| {
std::io::Error::new(std::io::ErrorKind::Other, e)
})?;
Ok(head_json)
Ok(json)
})
});
@ -343,7 +407,7 @@ impl RemoteClient {
fn put<T>(&self, uri: String, payload: T, expected: StatusCode) -> Result<()>
where hyper::Body: std::convert::From<T>, {
let mut core = Core::new()?;
// TODO enable TLS, see https://github.com/mozilla/mentat/issues/569
// TODO https://github.com/mozilla/mentat/issues/569
// let client = hyper::Client::configure()
// .connector(hyper_tls::HttpsConnector::new(4, &core.handle()).unwrap())
// .build(&core.handle());
@ -372,6 +436,105 @@ impl RemoteClient {
Ok(())
}
fn get_transactions(&self, parent_uuid: &Uuid) -> Result<Vec<Uuid>> {
let mut core = Core::new()?;
// TODO https://github.com/mozilla/mentat/issues/569
// let client = hyper::Client::configure()
// .connector(hyper_tls::HttpsConnector::new(4, &core.handle()).unwrap())
// .build(&core.handle());
let client = hyper::Client::new(&core.handle());
d(&format!("client"));
let uri = format!("{}/transactions?from={}", self.bound_base_uri(), parent_uuid);
let uri = uri.parse()?;
d(&format!("parsed uri {:?}", uri));
let work = client.get(uri).and_then(|res| {
println!("Response: {}", res.status());
res.body().concat2().and_then(move |body| {
let json: SerializedTransactions = serde_json::from_slice(&body).map_err(|e| {
std::io::Error::new(std::io::ErrorKind::Other, e)
})?;
Ok(json)
})
});
d(&format!("running..."));
let transactions_json = core.run(work)?;
d(&format!("got transactions: {:?}", &transactions_json.transactions));
Ok(transactions_json.transactions)
}
fn get_chunks(&self, transaction_uuid: &Uuid) -> Result<Vec<Uuid>> {
let mut core = Core::new()?;
// TODO https://github.com/mozilla/mentat/issues/569
// let client = hyper::Client::configure()
// .connector(hyper_tls::HttpsConnector::new(4, &core.handle()).unwrap())
// .build(&core.handle());
let client = hyper::Client::new(&core.handle());
d(&format!("client"));
let uri = format!("{}/transactions/{}", self.bound_base_uri(), transaction_uuid);
let uri = uri.parse()?;
d(&format!("parsed uri {:?}", uri));
let work = client.get(uri).and_then(|res| {
println!("Response: {}", res.status());
res.body().concat2().and_then(move |body| {
let json: DeserializableTransaction = serde_json::from_slice(&body).map_err(|e| {
std::io::Error::new(std::io::ErrorKind::Other, e)
})?;
Ok(json)
})
});
d(&format!("running..."));
let transaction_json = core.run(work)?;
d(&format!("got transaction chunks: {:?}", &transaction_json.chunks));
Ok(transaction_json.chunks)
}
fn get_chunk(&self, chunk_uuid: &Uuid) -> Result<TxPart> {
let mut core = Core::new()?;
// TODO https://github.com/mozilla/mentat/issues/569
// let client = hyper::Client::configure()
// .connector(hyper_tls::HttpsConnector::new(4, &core.handle()).unwrap())
// .build(&core.handle());
let client = hyper::Client::new(&core.handle());
d(&format!("client"));
let uri = format!("{}/chunks/{}", self.bound_base_uri(), chunk_uuid);
let uri = uri.parse()?;
d(&format!("parsed uri {:?}", uri));
let work = client.get(uri).and_then(|res| {
println!("Response: {}", res.status());
res.body().concat2().and_then(move |body| {
let json: TxPart = serde_json::from_slice(&body).map_err(|e| {
std::io::Error::new(std::io::ErrorKind::Other, e)
})?;
Ok(json)
})
});
d(&format!("running..."));
let chunk = core.run(work)?;
d(&format!("got transaction chunk: {:?}", &chunk));
Ok(chunk)
}
fn put_transaction(&self, transaction_uuid: &Uuid, parent_uuid: &Uuid, chunks: &Vec<Uuid>) -> Result<()> {
// {"parent": uuid, "chunks": [chunk1, chunk2...]}
let transaction = SerializedTransaction {

View file

@ -33,6 +33,13 @@ impl TxMapper {
Ok(())
}
// TODO upsert...? error checking..?
pub fn set_tx_uuid(db_tx: &mut rusqlite::Transaction, tx: Entid, uuid: &Uuid) -> Result<()> {
let uuid_bytes = uuid.as_bytes().to_vec();
db_tx.execute("INSERT INTO tolstoy_tu (tx, uuid) VALUES (?, ?)", &[&tx, &uuid_bytes])?;
Ok(())
}
// TODO for when we're downloading, right?
pub fn get_or_set_uuid_for_tx(db_tx: &mut rusqlite::Transaction, tx: Entid) -> Result<Uuid> {
match TxMapper::get(db_tx, tx)? {
@ -92,8 +99,8 @@ pub mod tests {
#[test]
fn test_getters() {
let mut conn = schema::tests::setup_conn();
let mut tx = conn.transaction().expect("db tx");
let mut conn = schema::tests::setup_conn_bare();
let mut tx = schema::tests::setup_tx(&mut conn);
assert_eq!(None, TxMapper::get(&mut tx, 1).expect("success"));
let set_uuid = TxMapper::get_or_set_uuid_for_tx(&mut tx, 1).expect("success");
assert_eq!(Some(set_uuid), TxMapper::get(&mut tx, 1).expect("success"));
@ -101,8 +108,8 @@ pub mod tests {
#[test]
fn test_bulk_setter() {
let mut conn = schema::tests::setup_conn();
let mut tx = conn.transaction().expect("db tx");
let mut conn = schema::tests::setup_conn_bare();
let mut tx = schema::tests::setup_tx(&mut conn);
let mut map = HashMap::new();
TxMapper::set_bulk(&mut tx, &map).expect("empty map success");

View file

@ -130,14 +130,21 @@ impl Processor {
pub fn process<R>(sqlite: &rusqlite::Transaction, from_tx: Option<Entid>, receiver: &mut R) -> Result<()>
where R: TxReceiver {
let tx_filter = match from_tx {
Some(tx) => format!(" WHERE tx > {} ", tx),
Some(tx) => format!("WHERE tx > {}", tx),
None => format!("")
};
// If no 'from_tx' is provided, get everything but skip over the first (bootstrap) transaction.
let skip_first_tx = match from_tx {
Some(_) => false,
None => true
};
let select_query = format!("SELECT e, a, v, value_type_tag, tx, added FROM transactions {} ORDER BY tx", tx_filter);
let mut stmt = sqlite.prepare(&select_query)?;
let mut rows = stmt.query_and_then(&[], to_tx_part)?.peekable();
let mut at_first_tx = true;
let mut current_tx = None;
while let Some(row) = rows.next() {
let datom = row?;
@ -153,6 +160,10 @@ impl Processor {
},
None => {
current_tx = Some(datom.tx);
if at_first_tx && skip_first_tx {
at_first_tx = false;
continue;
}
receiver.tx(
datom.tx,
&mut DatomsIterator::new(&datom, &mut rows)

View file

@ -32,11 +32,12 @@ use mentat::{
QueryOutput,
QueryResults,
Store,
Syncable,
TxReport,
TypedValue,
};
use mentat::sync::Syncable;
use command_parser::{
Command,
HELP_COMMAND,