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feat: end and reconnect pool after error #681

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merged 1 commit into from
Mar 13, 2024
Merged

feat: end and reconnect pool after error #681

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17 changes: 12 additions & 5 deletions src/middleware/indexer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -10,18 +10,25 @@ const {

const replicaConnections = JSON.parse(INDEXER_DB_REPLICAS);
const indexerConnection = replicaConnections[(new Date()).valueOf() % replicaConnections.length];
const pool = new Pool({ connectionString: indexerConnection, maxUses: 1000 });
let pool = new Pool({ connectionString: indexerConnection, maxUses: 1000 });

pool.on('error', (err) => {
console.error('Postgres pool error: ', err);
pool.end()
.then(() => {
pool = new Pool({ connectionString: indexerConnection, maxUses: 1000 });
})
.catch(() => {
console.error('failed to drain PG connection pool');
});
});

const poolMatch = NEAR_WALLET_ENV.startsWith('mainnet')
? JSON.stringify(['%.poolv1.near', '%.pool.near']).replace(/"/g, '\'')
: JSON.stringify(['%.pool.%.m0', '%.factory01.littlefarm.testnet', '%.factory.colorpalette.testnet']).replace(/"/g, '\'');

const findLastBlockByTimestamp = async () => {
const { rows: [ lastBlock ] } = await pool.query('select block_timestamp FROM blocks ORDER BY block_timestamp DESC LIMIT 1');
const { rows: [lastBlock] } = await pool.query('select block_timestamp FROM blocks ORDER BY block_timestamp DESC LIMIT 1');
return lastBlock;
};

Expand Down Expand Up @@ -127,7 +134,7 @@ const findReceivers = async (ctx) => {
};

const likelyTokensFromBlock = async ({ fromBlockTimestamp, accountId }) => {
const { block_timestamp: lastBlockTimestamp } = await findLastBlockByTimestamp();
const { block_timestamp: lastBlockTimestamp } = await findLastBlockByTimestamp();

const received = `
select distinct receipt_receiver_account_id as receiver_account_id
Expand Down Expand Up @@ -168,7 +175,7 @@ const likelyTokensFromBlock = async ({ fromBlockTimestamp, accountId }) => {
};

const likelyNFTsFromBlock = async ({ fromBlockTimestamp, accountId }) => {
const { block_timestamp: lastBlockTimestamp } = await findLastBlockByTimestamp();
const { block_timestamp: lastBlockTimestamp } = await findLastBlockByTimestamp();

const ownershipChangeFunctionCalls = `
select distinct receipt_receiver_account_id as receiver_account_id
Expand Down Expand Up @@ -208,7 +215,7 @@ const findLikelyTokensFromBlock = async (ctx) => {
fromBlockTimestamp,
accountId
});

ctx.body = {
version: '1.0.0',
lastBlockTimestamp,
Expand Down
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