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sync refactor

This commit is contained in:
Minghao Li 2022-03-18 15:21:40 +08:00
parent b5547c7a3d
commit 5de67d4256
3 changed files with 114 additions and 0 deletions
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40
source/libs/sync/inc/syncOnMessage.h
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@ -25,6 +25,46 @@ extern "C" {
#include <stdlib.h>
#include "taosdef.h"
// TLA+ Spec
// Receive(m) ==
// LET i == m.mdest
// j == m.msource
// IN \* Any RPC with a newer term causes the recipient to advance
// \* its term first. Responses with stale terms are ignored.
// \/ UpdateTerm(i, j, m)
// \/ /\ m.mtype = RequestVoteRequest
// /\ HandleRequestVoteRequest(i, j, m)
// \/ /\ m.mtype = RequestVoteResponse
// /\ \/ DropStaleResponse(i, j, m)
// \/ HandleRequestVoteResponse(i, j, m)
// \/ /\ m.mtype = AppendEntriesRequest
// /\ HandleAppendEntriesRequest(i, j, m)
// \/ /\ m.mtype = AppendEntriesResponse
// /\ \/ DropStaleResponse(i, j, m)
// \/ HandleAppendEntriesResponse(i, j, m)
// DuplicateMessage(m) ==
// /\ Send(m)
// /\ UNCHANGED <<serverVars, candidateVars, leaderVars, logVars>>
// DropMessage(m) ==
// /\ Discard(m)
// /\ UNCHANGED <<serverVars, candidateVars, leaderVars, logVars>>
// Next == /\ \/ \E i \in Server : Restart(i)
// \/ \E i \in Server : Timeout(i)
// \/ \E i,j \in Server : RequestVote(i, j)
// \/ \E i \in Server : BecomeLeader(i)
// \/ \E i \in Server, v \in Value : ClientRequest(i, v)
// \/ \E i \in Server : AdvanceCommitIndex(i)
// \/ \E i,j \in Server : AppendEntries(i, j)
// \/ \E m \in DOMAIN messages : Receive(m)
// \/ \E m \in DOMAIN messages : DuplicateMessage(m)
// \/ \E m \in DOMAIN messages : DropMessage(m)
// \* History variable that tracks every log ever:
// /\ allLogs' = allLogs \cup {log[i] : i \in Server}
//
#ifdef __cplusplus
}
#endif

34
source/libs/sync/src/syncMain.c
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@ -151,6 +151,30 @@ SSyncNode* syncNodeOpen(const SSyncInfo* pSyncInfo) {
// init life cycle
// TLA+ Spec
// InitHistoryVars == /\ elections = {}
// /\ allLogs = {}
// /\ voterLog = [i \in Server |-> [j \in {} |-> <<>>]]
// InitServerVars == /\ currentTerm = [i \in Server |-> 1]
// /\ state = [i \in Server |-> Follower]
// /\ votedFor = [i \in Server |-> Nil]
// InitCandidateVars == /\ votesResponded = [i \in Server |-> {}]
// /\ votesGranted = [i \in Server |-> {}]
// \* The values nextIndex[i][i] and matchIndex[i][i] are never read, since the
// \* leader does not send itself messages. It's still easier to include these
// \* in the functions.
// InitLeaderVars == /\ nextIndex = [i \in Server |-> [j \in Server |-> 1]]
// /\ matchIndex = [i \in Server |-> [j \in Server |-> 0]]
// InitLogVars == /\ log = [i \in Server |-> << >>]
// /\ commitIndex = [i \in Server |-> 0]
// Init == /\ messages = [m \in {} |-> 0]
// /\ InitHistoryVars
// /\ InitServerVars
// /\ InitCandidateVars
// /\ InitLeaderVars
// /\ InitLogVars
//
// init TLA+ server vars
pSyncNode->state = TAOS_SYNC_STATE_FOLLOWER;
pSyncNode->pRaftStore = raftStoreOpen(pSyncNode->raftStorePath);
@ -728,6 +752,16 @@ static int32_t syncNodeOnPingReplyCb(SSyncNode* ths, SyncPingReply* pMsg) {
return ret;
}
// TLA+ Spec
// ClientRequest(i, v) ==
// /\ state[i] = Leader
// /\ LET entry == [term |-> currentTerm[i],
// value |-> v]
// newLog == Append(log[i], entry)
// IN log' = [log EXCEPT ![i] = newLog]
// /\ UNCHANGED <<messages, serverVars, candidateVars,
// leaderVars, commitIndex>>
//
static int32_t syncNodeOnClientRequestCb(SSyncNode* ths, SyncClientRequest* pMsg) {
int32_t ret = 0;
syncClientRequestLog2("==syncNodeOnClientRequestCb==", pMsg);

40
source/libs/sync/src/syncOnMessage.c
View File

@ -14,3 +14,43 @@
*/
#include "syncOnMessage.h"
// TLA+ Spec
// Receive(m) ==
// LET i == m.mdest
// j == m.msource
// IN \* Any RPC with a newer term causes the recipient to advance
// \* its term first. Responses with stale terms are ignored.
// \/ UpdateTerm(i, j, m)
// \/ /\ m.mtype = RequestVoteRequest
// /\ HandleRequestVoteRequest(i, j, m)
// \/ /\ m.mtype = RequestVoteResponse
// /\ \/ DropStaleResponse(i, j, m)
// \/ HandleRequestVoteResponse(i, j, m)
// \/ /\ m.mtype = AppendEntriesRequest
// /\ HandleAppendEntriesRequest(i, j, m)
// \/ /\ m.mtype = AppendEntriesResponse
// /\ \/ DropStaleResponse(i, j, m)
// \/ HandleAppendEntriesResponse(i, j, m)
// DuplicateMessage(m) ==
// /\ Send(m)
// /\ UNCHANGED <<serverVars, candidateVars, leaderVars, logVars>>
// DropMessage(m) ==
// /\ Discard(m)
// /\ UNCHANGED <<serverVars, candidateVars, leaderVars, logVars>>
// Next == /\ \/ \E i \in Server : Restart(i)
// \/ \E i \in Server : Timeout(i)
// \/ \E i,j \in Server : RequestVote(i, j)
// \/ \E i \in Server : BecomeLeader(i)
// \/ \E i \in Server, v \in Value : ClientRequest(i, v)
// \/ \E i \in Server : AdvanceCommitIndex(i)
// \/ \E i,j \in Server : AppendEntries(i, j)
// \/ \E m \in DOMAIN messages : Receive(m)
// \/ \E m \in DOMAIN messages : DuplicateMessage(m)
// \/ \E m \in DOMAIN messages : DropMessage(m)
// \* History variable that tracks every log ever:
// /\ allLogs' = allLogs \cup {log[i] : i \in Server}
//