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node.rs
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node.rs
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// Copyright 2016 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
use std::collections::{HashMap, HashSet};
use std::sync::{Arc, RwLock};
use std::time::Duration;
use std::boxed::FnBox;
use std::ops::Deref;
use std::fs;
use rocksdb::DB;
use tempdir::TempDir;
use super::cluster::{Simulator, Cluster};
use tikv::server::Node;
use tikv::raftstore::store::*;
use kvproto::raft_cmdpb::*;
use kvproto::raft_serverpb::{self, RaftMessage};
use kvproto::eraftpb::MessageType;
use tikv::raftstore::{store, Result, Error};
use tikv::util::HandyRwLock;
use tikv::util::transport::SendCh;
use tikv::server::Config as ServerConfig;
use tikv::server::transport::{ServerRaftStoreRouter, RaftStoreRouter};
use tikv::raft::SnapshotStatus;
use tikv::storage::ALL_CFS;
use super::pd::TestPdClient;
use super::transport_simulate::*;
pub struct ChannelTransportCore {
snap_paths: HashMap<u64, (SnapManager, TempDir)>,
routers: HashMap<u64, SimulateTransport<Msg, ServerRaftStoreRouter>>,
}
#[derive(Clone)]
pub struct ChannelTransport {
core: Arc<RwLock<ChannelTransportCore>>,
}
impl ChannelTransport {
pub fn new() -> ChannelTransport {
ChannelTransport {
core: Arc::new(RwLock::new(ChannelTransportCore {
snap_paths: HashMap::new(),
routers: HashMap::new(),
})),
}
}
}
impl Deref for ChannelTransport {
type Target = Arc<RwLock<ChannelTransportCore>>;
fn deref(&self) -> &Self::Target {
&self.core
}
}
impl Channel<RaftMessage> for ChannelTransport {
fn send(&self, msg: RaftMessage) -> Result<()> {
let from_store = msg.get_from_peer().get_store_id();
let to_store = msg.get_to_peer().get_store_id();
let to_peer_id = msg.get_to_peer().get_id();
let region_id = msg.get_region_id();
let is_snapshot = msg.get_message().get_msg_type() == MessageType::MsgSnapshot;
if msg.get_message().get_msg_type() == MessageType::MsgSnapshot {
let snap = msg.get_message().get_snapshot();
let key = SnapKey::from_snap(snap).unwrap();
let source_file = match self.rl().snap_paths.get(&from_store) {
Some(p) => {
p.0.wl().register(key.clone(), SnapEntry::Sending);
p.0.rl().get_snap_file(&key, true).unwrap()
}
None => return Err(box_err!("missing temp dir for store {}", from_store)),
};
let dst_file = match self.rl().snap_paths.get(&to_store) {
Some(p) => {
p.0.wl().register(key.clone(), SnapEntry::Receiving);
p.0.rl().get_snap_file(&key, false).unwrap()
}
None => return Err(box_err!("missing temp dir for store {}", to_store)),
};
defer!({
let core = self.rl();
core.snap_paths[&from_store].0.wl().deregister(&key, &SnapEntry::Sending);
core.snap_paths[&to_store].0.wl().deregister(&key, &SnapEntry::Receiving);
});
if !dst_file.exists() {
try!(fs::copy(source_file.path(), dst_file.path()));
}
}
match self.core.rl().routers.get(&to_store) {
Some(h) => {
try!(h.send_raft_msg(msg));
if is_snapshot {
// should report snapshot finish.
self.rl()
.routers
.get(&from_store)
.unwrap()
.report_snapshot(region_id, to_peer_id, SnapshotStatus::Finish)
.unwrap();
}
Ok(())
}
_ => Err(box_err!("missing sender for store {}", to_store)),
}
}
}
type SimulateChannelTransport = SimulateTransport<RaftMessage, ChannelTransport>;
pub struct NodeCluster {
trans: ChannelTransport,
pd_client: Arc<TestPdClient>,
nodes: HashMap<u64, Node<TestPdClient>>,
simulate_trans: HashMap<u64, SimulateChannelTransport>,
}
impl NodeCluster {
pub fn new(pd_client: Arc<TestPdClient>) -> NodeCluster {
NodeCluster {
trans: ChannelTransport::new(),
pd_client: pd_client,
nodes: HashMap::new(),
simulate_trans: HashMap::new(),
}
}
}
impl NodeCluster {
#[allow(dead_code)]
pub fn get_node_router(&self, node_id: u64) -> SimulateTransport<Msg, ServerRaftStoreRouter> {
self.trans.rl().routers.get(&node_id).cloned().unwrap()
}
}
impl Simulator for NodeCluster {
fn run_node(&mut self, node_id: u64, cfg: ServerConfig, engine: Arc<DB>) -> u64 {
assert!(node_id == 0 || !self.nodes.contains_key(&node_id));
let mut event_loop = create_event_loop(&cfg.raft_store).unwrap();
let simulate_trans = SimulateTransport::new(self.trans.clone());
let mut node = Node::new(&mut event_loop, &cfg, self.pd_client.clone());
let (snap_mgr, tmp) = if node_id == 0 ||
!self.trans.rl().snap_paths.contains_key(&node_id) {
let tmp = TempDir::new("test_cluster").unwrap();
let snap_mgr = store::new_snap_mgr(tmp.path().to_str().unwrap(),
Some(node.get_sendch()));
(snap_mgr, Some(tmp))
} else {
let trans = self.trans.rl();
let &(ref snap_mgr, _) = trans.snap_paths.get(&node_id).unwrap();
(snap_mgr.clone(), None)
};
node.start(event_loop, engine, simulate_trans.clone(), snap_mgr.clone()).unwrap();
assert!(node_id == 0 || node_id == node.id());
debug!("node_id: {} tmp: {:?}",
node_id,
tmp.as_ref().map(|p| p.path().to_str().unwrap().to_owned()));
if let Some(tmp) = tmp {
self.trans.wl().snap_paths.insert(node.id(), (snap_mgr, tmp));
}
let node_id = node.id();
let router = ServerRaftStoreRouter::new(node.get_sendch(), node_id);
self.trans.wl().routers.insert(node_id, SimulateTransport::new(router));
self.nodes.insert(node_id, node);
self.simulate_trans.insert(node_id, simulate_trans);
node_id
}
fn get_snap_dir(&self, node_id: u64) -> String {
self.trans.wl().snap_paths.get(&node_id).unwrap().1.path().to_str().unwrap().to_owned()
}
fn stop_node(&mut self, node_id: u64) {
self.nodes.remove(&node_id);
self.trans.wl().routers.remove(&node_id).unwrap();
}
fn get_node_ids(&self) -> HashSet<u64> {
self.nodes.keys().cloned().collect()
}
fn call_command_on_node(&self,
node_id: u64,
request: RaftCmdRequest,
timeout: Duration)
-> Result<RaftCmdResponse> {
if !self.trans.rl().routers.contains_key(&node_id) {
return Err(box_err!("missing sender for store {}", node_id));
}
let router = self.trans.rl().routers.get(&node_id).cloned().unwrap();
wait_op!(|cb: Box<FnBox(RaftCmdResponse) + 'static + Send>| {
router.send_command(request, cb).unwrap()
},
timeout)
.ok_or_else(|| Error::Timeout(format!("request timeout for {:?}", timeout)))
}
fn send_raft_msg(&self, msg: raft_serverpb::RaftMessage) -> Result<()> {
self.trans.send(msg)
}
fn add_send_filter(&mut self, node_id: u64, filter: SendFilter) {
self.simulate_trans.get_mut(&node_id).unwrap().add_filter(filter);
}
fn clear_send_filters(&mut self, node_id: u64) {
self.simulate_trans.get_mut(&node_id).unwrap().clear_filters();
}
fn add_recv_filter(&mut self, node_id: u64, filter: RecvFilter) {
let mut trans = self.trans.wl();
trans.routers.get_mut(&node_id).unwrap().add_filter(filter);
}
fn clear_recv_filters(&mut self, node_id: u64) {
let mut trans = self.trans.wl();
trans.routers.get_mut(&node_id).unwrap().clear_filters();
}
fn get_store_sendch(&self, node_id: u64) -> Option<SendCh<Msg>> {
self.nodes.get(&node_id).map(|node| node.get_sendch())
}
}
pub fn new_node_cluster(id: u64, count: usize) -> Cluster<NodeCluster> {
let pd_client = Arc::new(TestPdClient::new(id));
let sim = Arc::new(RwLock::new(NodeCluster::new(pd_client.clone())));
Cluster::new(id, count, ALL_CFS, sim, pd_client)
}