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Disconnection #3

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Disconnection #3

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897d1af
Try to enable disconnecting
4e554c4c Oct 27, 2020
868fae9
Remove messages originating from a bad partition
4e554c4c Oct 27, 2020
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10 changes: 10 additions & 0 deletions raft.js
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Original file line number Diff line number Diff line change
Expand Up @@ -358,6 +358,16 @@ let View = function(controller, svg, module) {
rule: 'clientRequest',
args: s.serverId,
},
{
label: 'disconnect from network',
rule: 'disconnect',
args: s.serverId,
},
{
label: 'connect to network',
rule: 'connect',
args: s.serverId,
},
]);
});

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12 changes: 11 additions & 1 deletion raft.model
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Expand Up @@ -43,6 +43,7 @@ type Server : record {
log: Log,

// Volatile state
disconnected : Boolean,
state: either {
Follower,
Candidate {
Expand Down Expand Up @@ -145,6 +146,7 @@ function sendMessage(message: Message) {
function init() {
for server in servers {
server.timeoutAt = makeElectionTimeout();
server.disconnected = False;
}
}

Expand Down Expand Up @@ -178,6 +180,14 @@ external startup for serverId, server in servers {
}
}

external disconnect for server in servers {
server.disconnected = True;
}

external connect for server in servers {
server.disconnected = False;
}

function stableLeader() -> Boolean {
for serverId, server in servers {
match server.state {
Expand Down Expand Up @@ -424,7 +434,7 @@ rule handleMessage for message in network {
if past(message.deliverAt) {
var from : ServerId = message.from;
var to : ServerId = message.to;
if servers[message.to].state == Offline {
if servers[to].state == Offline || servers[from].disconnected || servers[to].disconnected {
remove(network, message);
} else {
match message.payload {
Expand Down