Montassar Ghanmy
99 lines
2.5 KiB
JavaScript
99 lines
2.5 KiB
JavaScript
/* eslint-disable */
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var cassandra = require("cassandra-driver");
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var fromAuthProvider = new cassandra.auth.PlainTextAuthProvider("", "");
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var fromContactPoints = [""];
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var toAuthProvider = new cassandra.auth.PlainTextAuthProvider("", "");
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var toContactPoints = [""];
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// -- start process
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var fromClient = new cassandra.Client({
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localDataCenter: "datacenter1",
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contactPoints: fromContactPoints,
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authProvider: fromAuthProvider,
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keyspace: "tdrive",
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});
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var toClient = new cassandra.Client({
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localDataCenter: "datacenter1",
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contactPoints: toContactPoints,
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authProvider: toAuthProvider,
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keyspace: "tdrive",
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queryOptions: {
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consistency: cassandra.types.consistencies.quorum,
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},
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});
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// -- Get all tables and copy schema
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async function client(origin, query, parameters, options) {
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return await new Promise((resolve, reject) => {
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origin.execute(query, [], {}, function (err, result) {
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if (err) {
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reject({ err, result });
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} else {
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resolve(result);
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}
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});
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});
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}
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// Get all threads and then copy all messages in each threads
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let copiedMessages = 0;
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let copiedThreads = 0;
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(async () => {
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await new Promise(r => {
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fromClient.eachRow(
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"SELECT id from tdrive.threads",
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[],
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{ prepare: true, fetchSize: 50 },
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async function (n, row) {
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const threadId = row["id"];
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console.log("Threads / Messages :", copiedThreads, "/", copiedMessages);
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copiedThreads++;
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await new Promise(r2 => {
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fromClient.eachRow(
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"SELECT JSON * from tdrive.messages where thread_id = ? order by id desc",
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[threadId],
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{ prepare: true, fetchSize: 1000 },
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async function (n, row) {
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const message = row["[json]"];
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copiedMessages++;
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await toClient.execute(
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"INSERT INTO tdrive.messages JSON '" + message.replace(/'/g, "'$&") + "'",
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[],
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{ prepare: true },
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);
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},
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async function (err, result) {
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if (result && result.nextPage) {
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await new Promise(r => setTimeout(r, 100));
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result.nextPage();
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} else {
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r2();
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}
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},
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);
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});
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},
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async function (err, result) {
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if (result && result.nextPage) {
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await new Promise(r => setTimeout(r, 2000));
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result.nextPage();
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} else {
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r();
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}
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},
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);
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});
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})();
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