AtlasArc

Hotspot Risk

Spring Boot · AtlasArc 1.0.1+736db9b9 · 2026-07-31T22:30:00Z

A risk-ranking report for complexity, coupling, visibility, and coverage hotspots.

Refactoring Risk Briefing

This chapter ranks package-level risk signals before the diagrams: coupling pressure, distance from the main sequence, visibility, cycle participation.

Packages ranked1026
High distance188
High coupling139
Cycle packages4
CoverageNot loaded

Top Risk Drivers

Primary driverDistanceFan-inFan-out
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot
Coupling0.421698
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.context.properties.bind
Cycle participation0.44443
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.context.properties.source
Cycle participation0.67322
Packagespring-boot-build.module.spring-boot-web-server.main:org.springframework.boot.web.server
Coupling0.56418
Packagespring-boot-build.core.spring-boot-autoconfigure.main:org.springframework.boot.autoconfigure.service.connection
Coupling0.60630
Packagespring-boot-build.module.spring-boot-actuator.main:org.springframework.boot.actuate.endpoint
Coupling0.45610
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.env
Cycle participation0.48112
Packagespring-boot-build.module.spring-boot-actuator.main:org.springframework.boot.actuate.endpoint.web
Visibility0.52313

Subsystem-Level Architecture

Subsystem figures summarize boundary pressure, internal cohesion, and recursive architecture signals.

Rendered as Subsystems · Boundary Risk Open

Where does boundary pressure concentrate across the visible architecture?

Configuration
Focus
project root
Curated view
Boundary Risk
Filter
All visible packages
Encoding
Bubble
Package-folder subsystem rollup
X axis
Fan-out
Y axis
Fan-in
Size
Classes
Colour
Instability
  • How to read this graph: each bubble is a visible architecture-boundary rollup. Right means more outgoing boundary dependencies; up means more incoming boundary dependencies; size is total class count.
  • Colour follows instability, so red means outgoing-heavy rather than automatically wrong. Use the figure to find boundary surfaces worth inspecting in Topology or Matrix.
  • Dashed rings mark expanded aggregate boundaries whose visible descendants are also present. Terminal packages or source folders remain valid boundaries and use their own metrics.
Fan-in
0 50 100 150 200 250 300 0 200 400 600 800 spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… context spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… logging spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo…
Fan-out
Rendered as Subsystems · Visibility Surface Open

Which subsystems expose a large public surface?

Configuration
Focus
project root
Curated view
Visibility Surface
Filter
All visible packages
Encoding
Bubble
Package-folder subsystem rollup
X axis
Relative visibility
Y axis
Abstractness
Size
Classes
Colour
Abstractness
  • How to read this graph: each bubble is a visible architecture-boundary rollup. Right means more visible API surface; up and colour both follow abstractness; size is total class count.
  • This view highlights boundary shape, not direct defect risk. A top/right bubble may be a deliberate public contract area.
  • Dashed rings mark expanded aggregate boundaries whose visible descendants are also present. Terminal packages or source folders remain valid boundaries and use their own metrics.
Abstractness (A)
0.00 0.20 0.40 0.60 0.80 1.00 0.00 0.20 0.40 0.60 0.80 1.00 spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… context spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… logging spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo…
Rel. Visibility (RV)
Rendered as Subsystems · Internal Tangles Open

Which subsystem areas contain internal cycle pressure?

Configuration
Focus
project root
Curated view
Internal Tangles
Filter
All visible packages
Encoding
Bubble
Package-folder subsystem rollup
X axis
cycleCount
Y axis
largestCycle
Size
packageCount
Colour
Cycle status
  • How to read this graph: each bubble is a visible architecture-boundary rollup. Right means more fully contained package-cycle groups; up means the largest contained package cycle is larger; size is package count.
  • Only package cycles fully inside the boundary count here. Terminal-package class/file tangles remain separate Package Internals evidence in Topology. Use the cycle tables, Topology, or Matrix for concrete dependency edges and cross-boundary cycle context.
  • Dashed rings mark expanded aggregate boundaries whose visible descendants are also present. Terminal packages or source folders remain valid boundaries and use their own metrics.
Largest cycle
0 0 0 1 1 1 0 1 2 3 4 spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo… spring-boot-build… org.springframewo…
Cycle groups

Package Hotspots

Hotspot figures rank packages by available metric-space risk signals such as coupling and complexity.

Rendered as Hotspots · Coupling Open

Which leaf packages stand out by coupling pressure?

Configuration
Items
Leaf packages
Focus
project root
Scope
Recursive
Preset
Coupling
Encoding
Bubble
One leaf package
X axis
Fan-out
Y axis
Fan-in
Size
Lines of code
Colour
Instability
  • Labels are shown for the largest report bubbles; inspect the package metrics table for the full ranked list.
Fan-in
0 5 10 15 20 0 100 200 300 400 config maven condition boot build bind source tools client autoconfigure bundling properties configurationproc… logback autoconfigure json zip autoconfigure context logging convert core type autoconfigure autoconfigure log4j2 json server
Fan-out
Rendered as Hotspots · Visibility Open

Which leaf packages are visible to many callers and far from the main sequence?

Configuration
Items
Leaf packages
Focus
project root
Scope
Recursive
Preset
Visibility
Encoding
Bubble
One leaf package
X axis
Relative visibility
Y axis
Fan-in
Size
Classes
Colour
Distance from main sequence
  • Labels are shown for the largest report bubbles; inspect the package metrics table for the full ranked list.
Fan-in
0.00 0.20 0.40 0.60 0.80 1.00 0 100 200 300 400 condition tools boot autoconfigure maven config context properties bind build autoconfigure json core autoconfigure zip autoconfigure autoconfigure jdbc source autoconfigure autoconfigure convert autoconfigure client docker autoconfigure autoconfigure bundling
Rel. Visibility (RV)
Rendered as Hotspots · Abstractness / Instability Open

Which leaf packages sit far from the main sequence?

Configuration
Items
Leaf packages
Focus
project root
Scope
Recursive
Preset
Zone Map
Encoding
Bubble
One leaf package
X axis
Instability
Y axis
Abstractness
Size
Distance from main sequence
Colour
Distance from main sequence
  • Labels are shown for the largest report bubbles; inspect the package metrics table for the full ranked list.
Abstractness (A)
0.00 0.20 0.40 0.60 0.80 1.00 0.00 0.20 0.40 0.60 0.80 1.00 util ssl json socket status cache container format web htmlunit buffering system validation entityclasses enversrepositories repositories customhints runtimewiring protocol util metrics autoconfigure autoconfigure livereload hibernate autoconfigure prometheus system
Instability (I)

Package Metrics

This table ranks packages by structural signals. Use it to inspect packages that combine high fan-in, high fan-out, cycle membership or size.

Fan-inFan-outInstabilityAbstractnessDistanceCycleLOC
Packagespring-boot-build.build-plugin.spring-boot-gradle-plugin.main:org.springframework.boot.gradle.util
200.000.001.00—83
Packagespring-boot-build.buildpack.spring-boot-buildpack-platform.main:org.springframework.boot.buildpack.platform.docker.ssl
100.000.001.00—732
Packagespring-boot-build.buildpack.spring-boot-buildpack-platform.main:org.springframework.boot.buildpack.platform.json
500.000.001.00—387
Packagespring-boot-build.buildpack.spring-boot-buildpack-platform.main:org.springframework.boot.buildpack.platform.socket
100.000.001.00—457
Packagespring-boot-build.cli.spring-boot-cli.main:org.springframework.boot.cli.command.status
600.000.001.00—110
Packagespring-boot-build.core.spring-boot-autoconfigure.main:org.springframework.boot.autoconfigure.cache
300.000.001.00—87
Packagespring-boot-build.core.spring-boot-autoconfigure.main:org.springframework.boot.autoconfigure.container
400.000.001.00—80
Packagespring-boot-build.core.spring-boot-autoconfigure.main:org.springframework.boot.autoconfigure.web.format
200.000.001.00—220
Packagespring-boot-build.core.spring-boot-test.main:org.springframework.boot.test.mock.web
100.000.001.00—119
Packagespring-boot-build.core.spring-boot-test.main:org.springframework.boot.test.web.htmlunit
100.000.001.00—118
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.context.metrics.buffering
600.000.001.00—376
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.system
800.000.001.00—696
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.validation
200.000.001.00—225
Packagespring-boot-build.documentation.spring-boot-docs.main:org.springframework.boot.docs.data.sql.jpaandspringdata.entityclasses
200.000.001.00—164
Packagespring-boot-build.documentation.spring-boot-docs.main:org.springframework.boot.docs.data.sql.jpaandspringdata.enversrepositories
011.001.001.00—50
Packagespring-boot-build.documentation.spring-boot-docs.main:org.springframework.boot.docs.data.sql.jpaandspringdata.repositories
011.001.001.00—48
Packagespring-boot-build.documentation.spring-boot-docs.main:org.springframework.boot.docs.packaging.nativeimage.advanced.customhints
100.000.001.00—93
Packagespring-boot-build.documentation.spring-boot-docs.main:org.springframework.boot.docs.web.graphql.runtimewiring
100.000.001.00—52
Packagespring-boot-build.loader.spring-boot-loader.main:org.springframework.boot.loader.net.protocol
100.000.001.00—73
Packagespring-boot-build.loader.spring-boot-loader.main:org.springframework.boot.loader.net.util
200.000.001.00—111
Packagespring-boot-build.module.spring-boot-amqp.main:org.springframework.boot.amqp.metrics
100.000.001.00—70
Packagespring-boot-build.module.spring-boot-data-jdbc-test.main:org.springframework.boot.data.jdbc.test.autoconfigure
051.001.001.00—231
Packagespring-boot-build.module.spring-boot-data-r2dbc-test.main:org.springframework.boot.data.r2dbc.test.autoconfigure
041.001.001.00—207
Packagespring-boot-build.module.spring-boot-devtools.main:org.springframework.boot.devtools.livereload
200.000.001.00—752
Packagespring-boot-build.module.spring-boot-hibernate.main:org.springframework.boot.hibernate
100.000.001.00—113
Packagespring-boot-build.module.spring-boot-micrometer-metrics-test.main:org.springframework.boot.micrometer.metrics.test.autoconfigure
021.001.001.00—151
Packagespring-boot-build.module.spring-boot-micrometer-metrics.main:org.springframework.boot.micrometer.metrics.export.prometheus
100.000.001.00—161
Packagespring-boot-build.module.spring-boot-micrometer-metrics.main:org.springframework.boot.micrometer.metrics.system
100.000.001.00—63
Packagespring-boot-build.module.spring-boot-micrometer-tracing-test.main:org.springframework.boot.micrometer.tracing.test.autoconfigure
021.001.001.00—148
Packagespring-boot-build.module.spring-boot-mustache.main:org.springframework.boot.mustache.reactive.view
100.000.001.00—234
Packagespring-boot-build.module.spring-boot-mustache.main:org.springframework.boot.mustache.servlet.view
100.000.001.00—213
Packagespring-boot-build.module.spring-boot-r2dbc.main:org.springframework.boot.r2dbc.metrics
100.000.001.00—89
Packagespring-boot-build.module.spring-boot-security-oauth2-resource-server.main:org.springframework.boot.security.oauth2.server.resource.autoconfigure.servlet
011.001.001.00—54
Packagespring-boot-build.module.spring-boot-security.main:org.springframework.boot.security.autoconfigure.web
200.000.001.00—79
Packagespring-boot-build.module.spring-boot-servlet.main:org.springframework.boot.servlet
100.000.001.00—104
Packagespring-boot-build.module.spring-boot-web-server-test.main:org.springframework.boot.web.server.test
021.001.001.00—63
Packagespring-boot-build.module.spring-boot-webclient-test.main:org.springframework.boot.webclient.test.autoconfigure
051.001.001.00—263
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-aspectj.main:smoketest.aspectj.service
100.000.001.00—45
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-data-rest.main:smoketest.data.rest.domain
100.000.001.00—152
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-hibernate.main:smoketest.jpa.domain
100.000.001.00—129
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-jetty.main:smoketest.jetty.util
100.000.001.00—44
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-simple.main:smoketest.simple.service
100.000.001.00—49
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-testng.main:smoketest.testng.service
100.000.001.00—45
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-tomcat.main:smoketest.tomcat.util
100.000.001.00—45
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-websocket-jetty.main:smoketest.websocket.jetty.reverse
100.000.001.00—45
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-websocket-jetty.main:smoketest.websocket.jetty.snake
100.000.001.00—464
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-websocket-tomcat.main:smoketest.websocket.tomcat.reverse
100.000.001.00—45
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-websocket-tomcat.main:smoketest.websocket.tomcat.snake
100.000.001.00—464
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-xml.main:smoketest.xml.service
100.000.001.00—66
Packagespring-boot-build.test-support.spring-boot-test-support.main:org.springframework.boot.testsupport.logging
011.001.001.00—56
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.builder
2120.090.000.91—748
Packagespring-boot-build.core.spring-boot-test.main:org.springframework.boot.test.json
600.000.100.90—2671
Packagespring-boot-build.module.spring-boot-actuator-autoconfigure.main:org.springframework.boot.actuate.autoconfigure.endpoint.expose
1820.100.000.90—221
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.info
810.110.000.89—1092
Packagespring-boot-build.module.spring-boot-graphql-test.main:org.springframework.boot.graphql.test.autoconfigure
170.881.000.88—319
Packagespring-boot-build.module.spring-boot-devtools.main:org.springframework.boot.devtools.restart.classloader
300.000.140.86—574
Packagespring-boot-build.module.spring-boot-micrometer-metrics.main:org.springframework.boot.micrometer.metrics
510.170.000.83—158
Packagespring-boot-build.module.spring-boot-servlet.main:org.springframework.boot.servlet.filter
400.000.170.83—260
Packagespring-boot-build.module.spring-boot-jooq-test.main:org.springframework.boot.jooq.test.autoconfigure
140.801.000.80—214
Packagespring-boot-build.core.spring-boot-test.main:org.springframework.boot.test.http.server
600.000.250.75—276
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.ansi
500.000.250.75—594
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.context.event
2130.130.130.75—593
Packagespring-boot-build.module.spring-boot-cache-test.main:org.springframework.boot.cache.test.autoconfigure
130.751.000.75—73
Packagespring-boot-build.module.spring-boot-data-cassandra-test.main:org.springframework.boot.data.cassandra.test.autoconfigure
130.751.000.75—206
Packagespring-boot-build.module.spring-boot-data-couchbase-test.main:org.springframework.boot.data.couchbase.test.autoconfigure
130.751.000.75—205
Packagespring-boot-build.module.spring-boot-data-mongodb-test.main:org.springframework.boot.data.mongodb.test.autoconfigure
130.751.000.75—206
Packagespring-boot-build.module.spring-boot-data-redis-test.main:org.springframework.boot.data.redis.test.autoconfigure
130.751.000.75—204
Packagespring-boot-build.module.spring-boot-devtools.main:org.springframework.boot.devtools.system
310.250.000.75—88
Packagespring-boot-build.module.spring-boot-grpc-server.main:org.springframework.boot.grpc.server
310.250.000.75—122
Packagespring-boot-build.module.spring-boot-security.main:org.springframework.boot.security.autoconfigure
930.250.000.75—381
Packagespring-boot-build.module.spring-boot-sql.main:org.springframework.boot.sql.init
500.000.250.75—391
Packagespring-boot-build.module.spring-boot-webflux-test.main:org.springframework.boot.webflux.test.autoconfigure
260.751.000.75—326
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-data-jpa.main:smoketest.data.jpa.domain
200.000.250.75—392
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-profile.main:smoketest.profile.service
100.000.250.75—130
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-test.main:smoketest.test.domain
200.000.250.75—185
Packagespring-boot-build.module.spring-boot-micrometer-metrics.main:org.springframework.boot.micrometer.metrics.autoconfigure.export.simple
1760.260.000.74—183
Packagespring-boot-build.module.spring-boot-web-server.main:org.springframework.boot.web.server.autoconfigure
1140.270.000.73—323
Packagespring-boot-build.module.spring-boot-jdbc.main:org.springframework.boot.jdbc
1810.050.220.73—1672
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.web.error
1100.000.290.71—527
Packagespring-boot-build.module.spring-boot-micrometer-metrics.main:org.springframework.boot.micrometer.metrics.autoconfigure
3090.230.060.71—1131
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.origin
1700.000.300.70—876
Packagespring-boot-build.module.spring-boot-data-jpa-test.main:org.springframework.boot.data.jpa.test.autoconfigure
370.701.000.70—250
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.logging
1810.050.260.68—2448
Packagespring-boot-build.core.spring-boot-autoconfigure.main:org.springframework.boot.autoconfigure.web
930.250.070.68—784
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.context.properties.source
3220.060.270.67Architectural3912
Packagespring-boot-build.buildpack.spring-boot-buildpack-platform.main:org.springframework.boot.buildpack.platform.docker.type
520.290.040.67—2251
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.availability
800.000.330.67—367
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.context
420.330.000.67—652
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.ssl.jks
420.330.000.67—216
Packagespring-boot-build.module.spring-boot-devtools.main:org.springframework.boot.devtools.settings
210.330.000.67—137
Packagespring-boot-build.module.spring-boot-grpc-server.main:org.springframework.boot.grpc.server.autoconfigure.security.web.servlet
210.330.000.67—144
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-hateoas.main:smoketest.hateoas.domain
100.000.330.67—118
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-websocket-jetty.main:smoketest.websocket.jetty.client
100.000.330.67—106
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-websocket-jetty.main:smoketest.websocket.jetty.echo
100.000.330.67—111
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-websocket-tomcat.main:smoketest.websocket.tomcat.client
100.000.330.67—106
Packagespring-boot-build.smoke-test.spring-boot-smoke-test-websocket-tomcat.main:smoketest.websocket.tomcat.echo
100.000.330.67—111
Packagespring-boot-build.core.spring-boot-testcontainers.main:org.springframework.boot.testcontainers.context
240.671.000.67—361
Packagespring-boot-build.module.spring-boot-http-client.main:org.springframework.boot.http.client
1630.160.180.67—3474
Packagespring-boot-build.core.spring-boot.main:org.springframework.boot.util
2200.000.380.63—686
Packagespring-boot-build.module.spring-boot-devtools.main:org.springframework.boot.devtools.remote.server
200.000.380.63—405