influxdb-cxx | C++ client library for InfluxDB | Time Series Database library

by awegrzyn C++ Version: v0.5.1 License: MIT

X-Ray Key Features Code Snippets(3)Community Discussions(1)Vulnerabilities Install Support

kandi X-RAY | influxdb-cxx Summary

influxdb-cxx is a C++ library typically used in Database, Time Series Database applications. influxdb-cxx has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

C++ client library for InfluxDB 1.x/2.x

Support

Quality

Security

License

Reuse

Support

influxdb-cxx has a low active ecosystem.

It has 70 star(s) with 49 fork(s). There are 5 watchers for this library.

It had no major release in the last 12 months.

There are 15 open issues and 31 have been closed. On average issues are closed in 51 days. There are 2 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of influxdb-cxx is v0.5.1

Quality

influxdb-cxx has 0 bugs and 0 code smells.

Security

influxdb-cxx has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

influxdb-cxx code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

influxdb-cxx is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

influxdb-cxx releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

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influxdb-cxx Key Features

No Key Features are available at this moment for influxdb-cxx.

influxdb-cxx Examples and Code Snippets

influxdb-cxx,Quick start,Batch write

C++

Lines of Code : 8

License : Permissive (MIT)

Copy

// Provide complete URI
auto influxdb = influxdb::InfluxDBFactory::Get("http://localhost:8086/?db=test");
// Write batches of 100 points
influxdb->batchOf(100);

for (;;) {
  influxdb->write(Point{"test"}.addField("value", 10));
}

influxdb-cxx,Quick start,Basic write

C++

Lines of Code : 6

License : Permissive (MIT)

Copy

// Provide complete URI
auto influxdb = influxdb::InfluxDBFactory::Get("http://localhost:8086/?db=test");
influxdb->write(Point{"test"}
  .addField("value", 10)
  .addTag("host", "localhost")
);

influxdb-cxx,Installation,Generic

C++

Lines of Code : 5

License : Permissive (MIT)

Copy

git clone https://github.com/awegrzyn/influxdb-cxx.git
cd influxdb-cxx; mkdir build
cd build
cmake ..
sudo make install

Community Discussions

Trending Discussions on influxdb-cxx

Query InfluxDB last point

QUESTION

Query InfluxDB last point

Asked 2021-Aug-11 at 16:22

I use a c++ library influxdb-cxx which uses curl to insert data into the database. In my c++ program, I will write 4 measurements and each of them has dozens of pieces points to insert per second. I use UDP to send data

...

ANSWER

Answered 2021-Aug-11 at 16:22

I would not use InfluxDB to work with data from last 500ms. This software is not for solutions like that. InfluxDB has no priority to put all values in defined time. It is not a real time system. If you need something like that I would suggest PLC type device which are real time. But... If you want to use it that way so much I can suggest following tricky solutions:

Ask for data which is not newer than, for example 400ms:

SELECT last(*) FROM "udp".."/controller/data" WHERE time >= now() - 10s and time<=now()-400ms

Assuming that after 400ms you have values in all fields. 3) Ask for data with safe delay, for example 500ms:

SELECT first(*) FROM "udp".."/controller/data" WHERE time >= now() - 500ms

Query above should give you first value before 500ms from now. Assuming that after little less than 500ms is needed to have all field values written.

Ask for data using where cluase for all value fields in way it will always be true if there will be only data there:

SELECT * FROM "udp".."/controller/data" WHERE time >= now() - 5s and "angular">-9999999 and "speed_left_rear">-9999999 and "speed_right_rear">-9999999"> and "voltage">-9999999 limit 1

All above assuming that you cannot read values lower than -9999999. This way you should receive only series that has all values written and is not older than 5s. Values you would get are the newest that have the same timestamp with all values written.

and 2) solution may work or not work in some conditions with assumed delays (it depends on system workload etc.). 3) might be the best solution if you need values all with the same timestamp.
One more way is to make 4 independent queries where you query for last values:

SELECT last(angular) FROM "udp".."/controller/data" SELECT last(speed_left_rear) FROM "udp".."/controller/data" SELECT last(speed_right_rear) FROM "udp".."/controller/data" SELECT last(voltage) FROM "udp".."/controller/data"

Or even ask for it in subqueries:

Select * from (SELECT last(angular) as "angular" FROM "udp".."/controller/data"),(SELECT last(speed_left_rear) as "speed_left_rear" FROM "udp".."/controller/data"),(SELECT last(speed_right_rear) as "speed_right_rear" FROM "udp".."/controller/data"),(SELECT last(voltage) as "voltage" FROM "udp".."/controller/data")

It will give you the latest values but they might not have the same timestamp.

Source https://stackoverflow.com/questions/68619027

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install influxdb-cxx

CMake 3.12+
C++17 compliler
CURL (required)
boost 1.57+ (optional - see Transports)

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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