- `./mvnw test ...` by its nature only runs unit tests, whose name is pattern of `*Test`, and it does never runs integration tests, whose name is patter of `IT*` or `*IT`, so in this PR we use `./mvnw clean test ...` to only run unit tests.
- `./mvnw integration-test ...` will run integration tests and unit tests, so we have `skipUTs` to control whether to skip the UT when running ITs, we already had this before.
  - As for ITs, we have two groups, one is normal tests without any `@Tag`s, the other one is slow integration tests, which is annotated with `@Tag("slow")`, so we divided the integration tests into two workflow jobs:
  - `./mvnw -DskipUTs=true clean integration-test -DexcludedGroups=slow ...` run the ITs but don't run the slow ITs and UTs, `-DexcludedGroups=slow` excludes tests annotated with `@Tag("slow")`
  - `./mvnw -DskipUTs=true clean integration-test -Dcheckstyle.skip -Dtest=${{ matrix.test.class }}` run the slow ITs (because `excludedGroups` is not set) one case at a time, by setting `-Dtest={{ class }}`, not run UTs,

Fix dynamic configuration watch implementation current value not null when the config is deleted. (#7606)

* Fix dynamic configuration watch implementation current value not null when the config is deleted.

* add changes.md

* fix LoggingConfigWatcher watch.vale, and when value = null ,config not reset.

* fix

* fix style

* Update oap-server/analyzer/agent-analyzer/src/main/java/org/apache/skywalking/oap/server/analyzer/provider/trace/UninstrumentedGatewaysConfig.java
Co-authored-by: Nkezhenxu94 <kezhenxu94@apache.org>

* use Strings.nullToEmpty
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>
Co-authored-by: Nkezhenxu94 <kezhenxu94@apache.org>

This reverts commit 62411964.

* Fix counter misuse in the alarm core

* Submit changelog

1.take 'getUrl' out of inner loop for better performance
2.use try-with-resources auto close CloseableHttpClient

* Fix SnakeYAML CVE. Make doc and sharing receiver codes consistent.

* Update changelog.

* Fix word.

* Fix style issue.

* Add dingtalk webhook
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

Co-authored-by: Necho <zifeihan@foxmail.com>

* Group Parameterized Endpoints. Configure the grouping rules for parameterized endpoints, to improve the meaning of the metrics.

* Support regex to include or exclude the names, requested through mail list, https://lists.apache.org/x/thread.html/rb6d91093776cf61880425449d3d25f9d560cd32363c0075de9a85d13@%3Cdev.skywalking.apache.org%3ECo-authored-by: NMrproliu <mrproliu@lagou.com>
Co-authored-by: Nkezhenxu94 <kezhenxu94@apache.org>

* Support service relation and database access alarm

* support service instance relation alarm

* support endpoint relation alarm

* document and format the name

* resolve issues

* add database access and endpoint relation rule example

* resolve code format

* remove unnecessary getter and setter package declare

* remove unnecessary fields
Co-authored-by: NMrproliu <mrproliu@lagou.com>

Here are the list of changes we made in this pull request. Top 3 are the principle changes, others are following these principles.
1. New agent and mesh report protocol. 
2. New agent header protocol. 
3. Service register, instance register and network address register have been removed permanently.
4. Service traffic, instance traffic and network alias metrics are added to replace the service, instance and network address inventory.
5. Register process has been removed.
6. Metrics stream process supports insert only mode, especially for traffic entities.
7. Metrics stream process supports no-downsampling mode for traffic entities and network alias.
8. Remove all register mechanism and cache in the java agent.
9. Remove MONTH step in GraphQL query.
10. Update UI to remove MONTH step query, the max query range is 60 days now.
11. Simplify the TTL to metrics and record. And the unit has been formatted in Day unit. No specific TTL for ElasticSearch storage.
12. Buffer mechanism of trace receiver and mesh receiver has been removed due to no register.
13. New service id, instance id and endpoint id rules, including service relation, instance relation and endpoint relation id rules.
14. Java agent support `keep tracing` mode, meaning, agent generating tracing context even the backend is unconnected/unavailable.
15. Plugin test tool up to date, in order to support new protocol.
16. Plugin tests expected data files updated.
17. E2E tests updated.
18. Telemetry of Grafana config has been merged into one.
19. Documentation updates.
20. [TBD] InfluxDB storage implementation is not available, need @dmsolr to fix later, in order to reduce the master change block by this PR.

* Finish step one, source and entity changed.

* Step 2, finish the basic and core DAO changes.

* Step 3. Change all source codes of backend, and make project compiling successfully.

* Make startup successful and persistence works.

* Fix dead codes in the MySQLTableInstaller.

* Fix mischange.

* Fix MySQL storage bootstrap error.

* Rollback dependency change.

* Simply enable tailing logs from container no mater it's in CI or not

* Fix segment table issue.

* Fix MySQL Instanller.

* Support Influxdb implementation of new endpoint traffic.

* Set and modify timeout to 90mins

* Remove unnecessary entity in the EndpointTraffic.

* Fix wrong entity builder and make name more clear.

* Fix 2 equal methods bug.

* Fix InfluxDB identifier(name) conflict issue.

* Fix endpoint topology query, endpoint id should be changed as a string.

* Fix a missing change.

* Fix a wrong commit.

* Column name can't be changed, due to it affect the hybrid metadb(h2/mysql) query, change it explicitly with double quotation marks.

* Fix formats.

* Remove endpoint/operation register from the agent. and change the plugin tests(without local tests). operationId relation codes have been removed from agent too.

* Try to fix the hytrix case.

* Fix 3 cases.

* Try to fix cases.

* Fix 2.

* Fix one.

* Fix the serviceId type mis-change.

* Fix int query

* Fix hystrix case.

* Fix a case.

* Fix EndpointCallRelationDispatcher set the source/dest endpoint without id encoding.

* Update documentation and add 2 test cases.
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>

* Support Daily Index Step.

* Fix format.

* Fix mischanged ES.

* support gRPC hook.

* revert submodule commit.

* revert submodule commitid.

* finish logical.

* remove author anonatation.

* fix ci.

* revert submodule.

* update logical.

* update logical.

* update logical.

* fix

* fix

* fix empty settings.

* fix.
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

Motivation:

Review code styles with some bots automatically.

Modifications:

Set up ReviewDog in GitHub Action to review code style.

Add more check rules to checkstyle plugin.

Result:

Obvious code styles can be reviewed and commented automatically.