* Delete aggregate with second time bucket.

* Add missing tables which need to clean data when timeout.

* Fixed check style error.

* Provide graphQL for Thermodynamic in overview page.

* Finish the Thermodynamic.

* `nodes` should not be null.

* Add initialized java bean for graphql protocol.

* Add license head.

* Fixed bean definition fault.

* Add test case for official component-libraries.yml file

* Fix a missing id in component-libraries.yml

* Add .NET/.NET Core components in component-libraries config

* Use [3000, 4000) for C#/.NET.

* Fixed #1090

1. Move setting the performance from create table action to install action.
2. Add check step that avoid filed type not match the definition when project upgraded.

* Setting namespace by class construct.

* Sample of DAO javadoc.

#1064

* Part of UI DAO documents commit.

* Describe all DAO in UI module .

#1064

* The class be tested was deleted.

* Fixed compile failure.

* Fixed CI failure cause of special character.

* gte -> gt
lte -> le

#1064

Add .NET Agent in Community agents section

* Replaced ObjectUtils for Objects methods

* Update README.md

* Update README.md

* Update README_ZH.md

* Refactor the old ComponentDefine and ComponentsDefine to be based on file for better extenable.

* Support don't uplink componentId, but componentName in segment.

* Fix CI.

* Move component id exchange logic from SpanDecorator to SpanIdExchanger.

* Fixed the compile error cause of class construct changes.

* empty service testcase

* complete GraphQLHandlerTest

* some test completed

* apm-collector-ui testcase completed

* Provide short database column name.

* Compile successful

* Attribute name change from source to target.

* Provide highPerformanceMode setting for short column name speciality.

* Fixed a bug that persistent timer started multiple times.
Running about 10 minute, the result of collector performance test is above 1w TPS when using MacBook 2017.

* commons testcase

* some ui module query testcase

* add testcase

* fix some checkStyle issue

* add some null testcase

* remove

* add license

* fix author error

* remove invalid tag @date

* add license which has been missed

* add doc for TraceCrossThread

* add jdk-cross-thread-plugin

Add an incubating feature in SkyWalking documents.

* partial doc

* tls

* translat all chinese document

* remove english

* revised submodule

Style issues when use *.

* Collector 5.0.0-alpha version upgrade FAQ.

* Update Upgrade.md

Reformat document and adjust some English.

* Add link.

* Refactor the collector configuration initialization.

#1047

Add contains point method instead instance of for decide span listener class type.
Transform minute time bucket just once.

#1032

Caffeine license,  Apache 2.0, no NOTICE file in repository which is https://github.com/ben-manes/caffeine. (#1046)

* 1. Add the performance collection point.
2. Report formatter.

#1032

* Add a new cache implementation by caffeine.

#1032

* Performance optimization:
Make all the loggers class variable to have the static modifier.

* Time stamp format to time bucket performance optimization.

#1032

* 1. Add the performance collection point.
2. Report formatter.

#1032

* Add a new cache implementation by caffeine.

#1032

* Performance optimization:
Make all the loggers class variable to have the static modifier.

* 1. Add the performance collection point.
2. Report formatter.

#1032

* Add a new cache implementation by caffeine.

#1032

2. Report formatter.

#1032