44 lines
1.2 KiB
JavaScript
44 lines
1.2 KiB
JavaScript
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'use strict';
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function DatabaseDequeuer(userDatabaseQueue, metadataBackend, jobCounter) {
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this.userDatabaseQueue = userDatabaseQueue;
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this.metadataBackend = metadataBackend;
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this.jobCounter = jobCounter;
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}
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DatabaseDequeuer.prototype.dequeue = function (callback) {
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var self = this;
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this.userDatabaseQueue.dequeue(function (err, userDatabaseName) {
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if (err) {
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return callback(err);
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}
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if (!userDatabaseName) {
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return callback();
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}
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self.metadataBackend.getAllUserDBParams(userDatabaseName, function (err, userDatabase) {
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console.log('>>>>', userDatabaseName, userDatabase);
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if (err) {
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return callback(err);
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}
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if (this.jobCounter.increment(userDatabase.dbHost)) {
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return callback(null, userDatabase);
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}
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// host is busy, enqueue job again!
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this.userDatabaseQueue.enqueue(userDatabaseName, function (err) {
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if (err) {
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return callback(err);
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}
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callback();
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});
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});
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});
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};
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module.exports = DatabaseDequeuer;
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