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UI -> Collector GraphQL query protocol

• Add order and status in trace query.

Agent Changes

• Add SOFA plugin.
• Add witness class for Kafka plugin.
• Add RuntimeContext in Context.
• Fix RuntimeContext fail in Tomcat plugin.
• Fix incompatible for getPropertyDescriptors in Spring core.
• Fix spymemcached plugin bug.
• Fix database URL parser bug.
• Fix StringIndexOutOfBoundsException when mysql jdbc url without databaseName。
• Fix duplicate slash in Spring MVC plugin bug.
• Fix namespace bug.
• Fix NPE in Okhttp plugin when connect failed.
• FIx MalformedURLException in httpClientComponent plugin.
• Remove unused dependencies in Dubbo plugin.
• Remove gRPC timeout to avoid out of memory leak.
• Rewrite Async http client plugin.
• [Incubating] Add trace custom ignore optional plugin.

Collector Changes

• Topology query optimization for more than 100 apps.
• Error rate alarm is not triggered.
• Tolerate unsupported segments.
• Support Integer Array, Long Array, String Array, Double Array in streaming data model.
• Support multiple entry span and multiple service name in one segment durtaion record.
• Use BulkProcessor to control the linear writing of data by multiple threads.
• Determine the log is enabled for the DEBUG level before printing message.
• Add static modifier to Logger.
• Add AspNet component.
• Filter inactive service in query.
• Support to query service based on Application.
• Fix RemoteDataMappingIdNotFoundException
• Exclude component-libaries.xml file in collector-*.jar, make sure it is in /conf only.
• Separate a single TTL in minute to in minute, hour, day, month metric and trace.
• Add order and status in trace query.
• Add folder lock to buffer folder.
• Modify operationName search from match to match_phrase.
• [Incubating] Add Zipkin span receiver. Support analysis Zipkin v1/v2 formats.
• [Incubating] Support sharding-sphere as storage implementor.

UI Changes

• Support login and access control.
• Add new webapp.yml configuration file.
• Modify webapp startup script.
• Link to trace query from Thermodynamic graph
• Add application selector in service view.
• Add order and status in trace query.

Documents

• Add architecture design doc.
• Reformat deploy document.
• Adjust Tomcat deploy document.
• Remove all Apache licenses files in dist release packages.
• Update user cases.
• Update UI licenses.
• Add incubating sections in doc.

Issues and Pull requests