{
  "title": "Spring Boot 3 Actuator Domain Structure",
  "description": "Hierarchical structure of Spring Boot 3 Actuator domain model showing health, metrics, environment, and logging subsystems.",
  "structure": {
    "ActuatorEndpoints": {
      "description": "Top-level Actuator endpoint categories",
      "categories": {
        "HealthEndpoint": {
          "description": "Aggregated health status from all HealthIndicators",
          "path": "/actuator/health",
          "fields": {
            "status": "HealthStatus enum — UP, DOWN, OUT_OF_SERVICE, UNKNOWN",
            "components": "Map<String, Health> — per-component status"
          },
          "builtInIndicators": [
            "DatabaseHealthIndicator",
            "DiskSpaceHealthIndicator",
            "PingHealthIndicator",
            "RedisHealthIndicator",
            "RabbitHealthIndicator",
            "KafkaHealthIndicator",
            "ElasticsearchHealthIndicator",
            "MongoHealthIndicator"
          ]
        },
        "MetricsEndpoint": {
          "description": "Micrometer-based application metrics registry",
          "path": "/actuator/metrics",
          "fields": {
            "names": "List<String> — all registered metric names"
          },
          "children": {
            "MetricDetail": {
              "path": "/actuator/metrics/{metricName}",
              "fields": {
                "name": "String — metric name",
                "description": "String — human-readable description",
                "baseUnit": "String — measurement unit",
                "measurements": "List<Measurement> — statistic values",
                "availableTags": "List<TagValues> — filterable dimensions"
              }
            }
          },
          "commonMetrics": [
            "jvm.memory.used",
            "jvm.memory.max",
            "jvm.gc.pause",
            "jvm.threads.live",
            "process.uptime",
            "process.cpu.usage",
            "system.cpu.usage",
            "http.server.requests",
            "hikaricp.connections.active",
            "logback.events"
          ]
        },
        "EnvironmentEndpoint": {
          "description": "Application environment and configuration",
          "path": "/actuator/env",
          "fields": {
            "activeProfiles": "List<String> — active Spring profiles",
            "defaultProfiles": "List<String> — default profiles",
            "propertySources": "List<PropertySource> — ordered property sources"
          },
          "children": {
            "PropertySource": {
              "fields": {
                "name": "String — source name (e.g., applicationConfig, systemProperties)",
                "properties": "Map<String, PropertyEntry> — key-value pairs"
              }
            }
          }
        },
        "LoggersEndpoint": {
          "description": "Runtime logger configuration",
          "path": "/actuator/loggers",
          "fields": {
            "levels": "List<String> — available log levels",
            "loggers": "Map<String, LoggerConfiguration> — all logger configs",
            "groups": "Map<String, LoggerGroup> — Spring Boot logger groups"
          },
          "children": {
            "LoggerConfiguration": {
              "fields": {
                "configuredLevel": "LogLevel — explicitly set level (nullable)",
                "effectiveLevel": "LogLevel — inherited effective level"
              }
            }
          }
        },
        "InfoEndpoint": {
          "description": "Application metadata from InfoContributors",
          "path": "/actuator/info",
          "contributors": [
            "BuildInfoContributor — from META-INF/build-info.properties",
            "GitInfoContributor — from git.properties",
            "JavaInfoContributor — JVM information",
            "OsInfoContributor — OS information"
          ]
        },
        "ThreadDumpEndpoint": {
          "description": "JVM thread snapshot for diagnostics",
          "path": "/actuator/threaddump"
        },
        "ScheduledTasksEndpoint": {
          "description": "All @Scheduled tasks registered in context",
          "path": "/actuator/scheduledtasks",
          "taskTypes": ["cron", "fixedDelay", "fixedRate", "custom"]
        }
      }
    }
  }
}