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Monitor for disconnection from DB.

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The events listener now listens to the 'end' event from
the PostgreSQL driver and will attempt to reconnect if
we get disconnected.
This commit is contained in:
D. Berge
2020-10-06 19:22:56 +02:00
parent 739cf4b9ec
commit 2486cb3944
1 changed files with 13 additions and 1 deletions
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14
lib/www/server/ws/db.js
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@@ -19,14 +19,26 @@ async function notify (data) {
}
}
function reconnect () {
console.log("Reconnecting");
// No need to provide parameters, channels should already be populated.
listen();
}
async function listen (addChannels, callback) {
if (!client) {
client = await pool.connect();
client.on('notification', notify);
console.log("Client connected");
client.on('error', (err) => console.error("Events client error: ", err));
client.on('end', () => {
console.warning("Events client disconnected. Will attempt to reconnect in five seconds");
setImmediate(() => client = null);
setTimeout(reconnect, 5000);
});
}
if (!Array.isArray(addChannels)) {
if (addChannels && !Array.isArray(addChannels)) {
addChannels = [addChannels];
}