leaflet.pub
a tool for shared writing and social publishing
use an advisory lock on token id on push
awarm.space
+7
+7
app/api/rpc/[command]/push.ts
+7
app/api/rpc/[command]/push.ts
···
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start = performance.now();
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try {
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await db.transaction(async (tx) => {
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// Acquire transaction-scoped advisory lock on token ID
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// Convert token ID to a stable integer for pg_advisory_xact_lock
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const tokenHash = token.id.split("").reduce((acc, char) => {
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return ((acc << 5) - acc + char.charCodeAt(0)) | 0;
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}, 0);
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await tx.execute(sql`SELECT pg_advisory_xact_lock(${tokenHash})`);
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+
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let clientGroupStart = performance.now();
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let clientGroup = await getClientGroup(tx, pushRequest.clientGroupID);
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timeGettingClientGroup = performance.now() - clientGroupStart;