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Status](https://coveralls.io/repos/valango/bulk-mongo/badge.svg?branch=master\u0026service=github)](https://coveralls.io/github/valango/bulk-mongo?branch=master)\n\nWritable object stream on top of MongoDb using bulk mode for speed.\n\nDepending on the nature of data, the gain in speed is about 8x\n\n## Installation\n\n```\n  npm install bulk-mongo\n```\n\n## Usage\n\n```js\n  var bulkMongo = require('bulk-mongo');\n  var factory_function = bulkMongo(dbInstance);\n  var bulkWriter = factory_function(targetCollection);\n  sourceStream.pipe(bulkWriter);\n```\n\nOf course the code above can be compressed into just two lines.\n\n## API\n\n### factory-function ( collection [, options] )\nIs used to create actual stream instance for a particular database connection\nit was created with. Factory arguments are:\n\n***collection*** is a collection name (a string) or a MongoDb Collection\ninstance.\n\n***options*** are explained below but usually they are not needed.\n\n  * ***bulkSize*** defaults to `1000`. This means that bulk writes will be committed\n  in chunks of 1000 records (documents). Setting this value to 1 or less forces\n  *non-bulk mode* using ordinary MongoDb **connection#insert()** to be used. Other\n  options are those eligible for [stream.Writable](http://nodejs.org/api/stream.html).\n  * ***objectMode*** defaults to `true`.\n  * ***highWaterMark*** defaults to `16`.\n\n***Returns*** an instance of `stream.Writable`.\n\n### Event:'done'\n\nThis event will follow the 'finish' event, indicating there is no more data to\nbe written into the database. This event is sent in *non-bulk mode* as well.\n\nBecause the asynchronous bulk write operation might be triggered by 'finish'\nevent, the 'finish' itself can not guarantee the data being synced.\n\n### Event:'inserts'\n\n  * `result` is an instance of [BulkWriteResult](http://mongodb.github.io/node-mongodb-native/2.0/api/BulkWriteResult.html).\n  It's members **nInserted** and **getInsertedIds()** can be particularly useful.\n\nThe event is being emitted every time after **UnorderedBulkOperation#execute()**\nhas been successful. In case of failure, **'error'** event is emitted.\n\n### Event:'done'\n\nThis event will follow the 'finish' event, indicating there is no more data to\nbe written into the database.\n\nBecause the asynchronous bulk write operation might be triggered by 'finish'\nevent, the 'finish' itself can not guarantee the data is synced.\n\n## Notes\n\nTo run tests or examples, make sure you have mongodb running -\nprobably you'll need something like this:\n```\n  mongod \u003e mongod.log \u0026 \n```\nbefore running tests. It could be handy to run *mongod* in \na separate terminal window.\n\n## Links\n\nSee [http://nodejs.org/api/stream.html#stream_class_stream_writable]() for\nother elements of consumer API.\n\nMongoDb Js driver API description is here:\n[http://mongodb.github.io/node-mongodb-native/1.4/]()\n\n\n## License\n\nMIT\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fvalango%2Fbulk-mongo","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fvalango%2Fbulk-mongo","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fvalango%2Fbulk-mongo/lists"}