* Change profile stack element to single level, not using tree

### Motivation:

Clean up unused codes and migrate to JDK8.

### Modifications:

- Remove unused codes.

- Close unclosed I/O stream.

- Remove meaningless comments.

### Result:

- No unnecessary codes concerns.

- No resources leak.

* provide profiled segment query
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>
Co-authored-by: NAirTrioa <44222967+AirTrioa@users.noreply.github.com>

* Refactor ConfigInitializer

* Rename some variable names and add some java docs
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

[BUG]Fix the bug of port identification failure when connecting Oracle with Sid mode (JDBC: Oracle: thin: @ < host >: < port > / < Sid >) (#4320)

* [BUG]Fix the bug of port identification failure when connecting Oracle with Sid mode (JDBC: Oracle: thin: @ < host >: < port > / < Sid >)
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

### Motivation:

Reduce footprint when tagging spans with the deprecated API: `AbstractSpan#tag(String, String)`.

### Modifications:

- Adopt [prototype pattern](https://en.wikipedia.org/wiki/Prototype_pattern) to create `Tag`, prevent from creating too many `StringTag` instances and `GC`ed.
- Replace `AbstractSpan#tag(String, String)` with `AbstractSpan#tag(AbstractTag, String)`.

### Result:

- Footprint is reduced.

* Provide the new version upgrade documentation/FAQ.

* Make the sentence more clear.

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

* mvnw proxy config

explanation about config proxy mvnw
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* Add lombok dependency into root pom.xml

* Update all depending lombok pom.xml(s)

* Change lombok version into latest(1.18.10)

* Revert lombok dependency config of test projects

* Remove redundant lombok dependency of submodule

* Move Lombok into dependencies node for applying globally

### Motivation:

Codes clean up

### Modifications:

- Remove v1 header, follow up #4244

- Use built-in Base64 class (since JDK8)

### Result:

- No more legacy v1 headers

- No unnecessary codes concerns by using built-in ability

### Motivation:

Make E2E tests more stable.

### Modifications:

Verify the traces loosely as other tests, and remove the `verify` method which verifies traces strictly, as we have preparation that also generates traces.

### Result:

E2E tests are more stable.

Motivation:

Reduce unnecessary memory allocation in frequently used class.

Modifications:

Replace the `AtomicInteger` with `AtomicIntegerFieldUpdater`

Result:

We can save 4 bytes (for the reference to `AtomicInteger` itself) for each `TracingContext`, which saves credible memory in a high-concurrent agent service.

* provide profile analyze empty interfaces

* fix comment error

* change comments

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

* Enhance gRPC plugin
Co-authored-by: NKanro <higan@live.cn>
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>
Co-authored-by: NGuoDuanLZ <739537111@qq.com>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* Provide Avro plugin
* provide testcase for avro-plugin
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>

Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>

* add exclude licene file dir.

* update comment.

* update pom exclude dir.

* update comment.
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* merge e2e profile test project, Use `env` to distinguish different storage types

* remove maven child module

* change `env` -> `storage`
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>

* fix thread unsafe problem in server-alarm-plugin (#4230)

* remove redundant #moveTo
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* sniffer processing profile task and report status and snapshot

* resolve testServiceDependencies test case error, use same register with `TraceSegmentServiceClient`

* resolve names

* change profile to single one thread run.

* 1. change to the ArrayList, because known the max size
2. rename issue resolved

* add profiling status enum

* change sniffer use full name issue

* 1. remove `prepareProfiling` method, build profiling status when construct `TracingContext`
2. add `TracingThreadListenerManager`, notify when tracing main thread finish
3. change ProfileThread start when process new profile task

* remove unnecessary getter

* add test assert error message

* adding `AgentServiceRule`

* revert original assert

* remove unnecessary getter

* resolve issues

* reduce findService invoke

* resolve style error

* recheck profiling when change first span operatin name

* resolve issues
1. remove `ContextManager#profilingRecheck`, only check on `TracingContext`
2. rename comments
3. resolve volatile array setting

* remove article link

* add `ProfileTask#maxSamplingCount` check

* resolve conflict (Downstream -> Commands)

* 1. change profilingSegmentSlots init on construct
2. if is profiling, recheck dont need to stop
3. total profiling count increment on first dump

* remove unused return val

* remove some `@param` and `@return`

* add profile task check result data bean

* change profiler slot to `AtomicReferenceArray`

* resolved java doc error

* fix doc error, remove meaningless descriptions

* resolve missed profile receiver on oap starter

* resolve method invoke error
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>

* Drop support of protocol v1 (sw3)

* Remove versioning logic further

* Remove more version5-only classes

* Commit missing files

* Update submodule and address review comment

* Fix failed tests

* ui sync: add git hook

* feat: update pom for prettierrc

* Sync UI.

* Remove elementui LICENSE

* Update powered-by.md

* Reorder
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>

* Add alarm metrics OP >= and <=, and refactor the operator logics

* Add unit test for OP
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* add token authentication between agent and oap receiver.

* revert ui.

* fix code style.

* update docs.

* Update docs/en/setup/backend/backend-token-auth.md
Co-Authored-By: Nkezhenxu94 <kezhenxu94@apache.org>

* fix hits.

* filter

* revert yml.

* update logical.

* fix codestyle check.

* fix ci and add e2e test case.

* revert mistake commit.

* fix ci

* remove duplicate maven dependency.

* revert pom

* revert unchanged.

* update javadocs.

* update logical.
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>

* Support new percentile func with new alarm and exporter for this new func.

* Fix e2e and OAL script

* Fix wrong column.

* Fix percentile bug and oal engine bug.

* Update query protocol and add percentile test case

* Support new query

* Adopt GraphQL requirement

* Fix wrong type cast.

* Fix query in H2 and ES.

* Fix docs and comments.

* Fix an e2e compile issue

* Fix javadoc issue and e2e test issue.

* Change CPM to Apdex in TTL test.

* Fix OAL for TTL e2e

* Add metrics query for service percentile.

* Fix OAL engine bug. Method deserialize is not working when more than two field types are IntKeyLongValueHashMap

* Support multiple IntKeyLongValueHashMap fields in remote. About serialize/deserialize methods.

* Fix graphql statement error in e2e.

* Fix serialize not working and add generated serialize/deserialize of percentile into test cases.

* Fix test case format

* Remove generated code test.

* Fix failed e2e test

* Use avg resp time to apdex in the TTL test.

* ADD multiple linear metrics check for endpoint in e2e cluster.

* Support `-` to represent no threshold and doc of alarm about this.

* Move break to right place.

* Fix wrong break(s)

* Fix break and add a test case for multiple values alarm.

* Fix format.

* Add more doc for this new feature and GraphQL query protocol.
Co-authored-by: NJared Tan <jian.tan@daocloud.io>
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>