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DOCSP-41152: Time Series
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.. _kotlin-sync-time-series: | ||
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================ | ||
Time Series Data | ||
================ | ||
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.. contents:: On this page | ||
:local: | ||
:backlinks: none | ||
:depth: 1 | ||
:class: singlecol | ||
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Overview | ||
-------- | ||
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In this guide, you can learn how to use the {+driver-short+} to store | ||
and interact with **time series data**. | ||
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Time series data is composed of the following components: | ||
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- Measured quantity | ||
- Timestamp for the measurement | ||
- Metadata that describes the measurement | ||
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The following table describes sample situations for which you could store time | ||
series data: | ||
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.. list-table:: | ||
:widths: 33, 33, 33 | ||
:header-rows: 1 | ||
:stub-columns: 1 | ||
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* - Situation | ||
- Measured Quantity | ||
- Metadata | ||
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* - Recording monthly sales by industry | ||
- Revenue in USD | ||
- Company, country | ||
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* - Tracking weather changes | ||
- Precipitation level | ||
- Location, sensor type | ||
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* - Recording fluctuations in housing prices | ||
- Monthly rent price | ||
- Location, currency | ||
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.. _cpp-time-series-create: | ||
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Create a Time Series Collection | ||
------------------------------- | ||
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.. important:: Server Version for Time Series Collections | ||
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To create and interact with time series collections, you must be | ||
connected to a deployment running {+mdb-server+} 5.0 or later. | ||
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You can create a time series collection to store time series data. | ||
To create a time series collection, pass the following parameters to the | ||
``createCollection()`` method: | ||
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- The name of the new collection to create | ||
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- A `CreateCollectionOptions <{+core-api+}/com/mongodb/client/model/CreateCollectionOptions.html>`__ | ||
object with the `TimeSeriesOptions <{+core-api+}/com/mongodb/client/model/TimeSeriesOptions.html>`__ set | ||
using the ``timeSeriesOptions()`` method | ||
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.. _kotlin-sync-time-series-create-example: | ||
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Example | ||
~~~~~~~ | ||
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This example creates the ``october2024`` time series collection in the | ||
``fall_weather`` database with the ``timeField`` option set to the ``"timestamp"`` field: | ||
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.. literalinclude:: /includes/data-formats/time-series.kt | ||
:language: kotlin | ||
:start-after: start-create-time-series | ||
:end-before: end-create-time-series | ||
:dedent: | ||
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To verify that you successfully created the time series collection, run | ||
the ``listCollections()`` method on the database and print the results: | ||
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.. io-code-block:: | ||
:copyable: true | ||
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.. input:: /includes/data-formats/time-series.kt | ||
:language: kotlin | ||
:start-after: start-print-time-series | ||
:end-before: end-print-time-series | ||
:dedent: | ||
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.. output:: | ||
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{ | ||
"name": "october2024", | ||
"type": "timeseries", | ||
"options": { | ||
"timeseries": { | ||
"timeField": "temperature", | ||
"granularity": "seconds", | ||
"bucketMaxSpanSeconds": 3600 | ||
} | ||
}, | ||
"info": { | ||
"readOnly": false | ||
} | ||
} | ||
... | ||
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.. _kotlin-sync-time-series-store: | ||
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Store Time Series Data | ||
---------------------- | ||
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You can insert data into a time series collection by using the ``insertOne()`` | ||
or ``insertMany()`` methods and specifying the measurement, timestamp, and metadata | ||
in each inserted document. | ||
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.. TODO: Uncomment when insert guide is created | ||
.. .. tip:: | ||
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.. To learn more about inserting documents into a collection, see the :ref:`kotlin-sync-write-insert` | ||
.. guide. | ||
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Example | ||
~~~~~~~ | ||
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This example inserts New York City temperature data into the ``october2024`` | ||
time series collection created in the :ref:`Create a Time Series Collection example | ||
<kotlin-sync-time-series-create-example>`. Each document contains the following fields: | ||
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- ``temperature``, which stores temperature measurements in degrees Fahrenheit | ||
- ``location``, which stores location metadata | ||
- ``timestamp``, which stores the time of the measurement collection | ||
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.. literalinclude:: /includes/data-formats/time-series.kt | ||
:language: kotlin | ||
:start-after: start-insert-time-series-data | ||
:end-before: end-insert-time-series-data | ||
:dedent: | ||
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.. _kotlin-sync-time-series-query: | ||
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Query Time Series Data | ||
---------------------- | ||
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You can use the same syntax and conventions to query data stored in a time | ||
series collection as you use when performing read or aggregation operations on | ||
other collections. To learn more about these operations, see | ||
the :ref:`Additional Information <kotlin-sync-time-series-addtl-info>` section. | ||
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.. _kotlin-sync-time-series-addtl-info: | ||
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Additional Information | ||
---------------------- | ||
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To learn more about the concepts mentioned in this guide, see the | ||
following {+mdb-server+} manual entries: | ||
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- :manual:`Time Series </core/timeseries-collections/>` | ||
- :manual:`Create and Query a Time Series Collection </core/timeseries/timeseries-procedures/>` | ||
- :manual:`Set Granularity for Time Series Data </core/timeseries/timeseries-granularity/>` | ||
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To learn more about performing read operations, see :ref:`kotlin-sync-read`. | ||
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.. TODO: To learn more about performing aggregation operations, see the :ref:`kotlin-sync-aggregation` | ||
.. guide. | ||
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API Documentation | ||
~~~~~~~~~~~~~~~~~ | ||
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To learn more about the methods mentioned in this guide, see the following | ||
API documentation: | ||
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- `createCollection() <{+api+}/mongodb-driver-kotlin-sync/com.mongodb.kotlin.client/-mongo-database/create-collection.html>`__ | ||
- `listCollections() <{+api+}/mongodb-driver-kotlin-sync/com.mongodb.kotlin.client/-mongo-database/list-collections.html>`__ | ||
- `insertOne() <{+api+}/mongodb-driver-kotlin-sync/com.mongodb.kotlin.client/-mongo-collection/insert-one.html>`__ | ||
- `insertMany() <{+api+}/mongodb-driver-kotlin-sync/com.mongodb.kotlin.client/-mongo-collection/insert-many.html>`__ |
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package org.example | ||
import com.mongodb.ConnectionString | ||
import com.mongodb.MongoClientSettings | ||
import com.mongodb.client.model.* | ||
import com.mongodb.kotlin.client.MongoClient | ||
import org.bson.json.JsonWriterSettings | ||
import java.util.Date | ||
import org.bson.Document | ||
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fun main() { | ||
val uri = "<connection string URI>" | ||
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val settings = MongoClientSettings.builder() | ||
.applyConnectionString(ConnectionString(uri)) | ||
.retryWrites(true) | ||
.build() | ||
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val mongoClient = MongoClient.create(settings) | ||
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// start-create-time-series | ||
val database = mongoClient.getDatabase("fall_weather") | ||
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val tsOptions = TimeSeriesOptions("timestamp") | ||
val collectionOptions = CreateCollectionOptions().timeSeriesOptions(tsOptions) | ||
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database.createCollection("october2024", collectionOptions) | ||
// end-create-time-series | ||
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// start-print-time-series | ||
val results = database.listCollections() | ||
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results.forEach { result -> | ||
println(result.toJson(JsonWriterSettings.builder().indent(true).build())) | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Nit: You could create the settings just once and reuse |
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} | ||
// end-print-time-series | ||
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// start-insert-time-series-data | ||
val collection = database.getCollection<Document>("october2024") | ||
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// Temperature data for October 1, 2024 | ||
val temperature1 = Document("temperature", 54) | ||
.append("location", "New York City") | ||
.append("timestamp", Date(1727755200000)) | ||
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// Temperature data for October 2, 2024 | ||
val temperature2 = Document("temperature", 55) | ||
.append("location", "New York City") | ||
.append("timestamp", Date(1727841600000)) | ||
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collection.insertMany(listOf(temperature1, temperature2)) | ||
// end-insert-time-series-data | ||
} | ||
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S: The API docs state that CreateCollectionOptions is a class, change "object" to "class"
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In Java, an object refers to an individual instantiation of a class (i.e. a class is the "template" and the object is the thing made from the template). In this case, I think it makes sense to leave this as "object".