How to write meter plugin

[ouyangli]

https://skywalking.apache.org/docs/main/v8.7.0/en/guides/java-plugin-development-guide/
There is too little information about meter plugin. How to customize a meter plugin? Is there a detailed development guide？

[wu-sheng]

This question is too general, but maybe this is your asking. https://skywalking.apache.org/docs/skywalking-java/latest/en/setup/service-agent/java-agent/java-plugin-development-guide/#meter-plugin

You could take a reference from tracing plugin doc(same page) about how to intercept methods, and use meter APIs at the core level to collect numbers.

[ouyangli]

Counter counter = MeterFactory.counter("new_increase_count").tag("Order Count", "100").mode(CounterMode.INCREMENT).build();
counter.increment(2d);

Why the summation and value fields of the meter_new_increase_count table are 0

[wu-sheng]

You need to build MAL script all received metrics. We would persistent unprocessed values to keep the cost of storage as less as possible

[ouyangli]

There is data in the database, and it is not 0, but the data in the dashboard is 0

[wu-sheng]

You are looking at different time demonstrations, minutes VS days.

[ouyangli]

Thank you very much, the problem has been solved

[ouyangli]