openapi: 3.1.0
info:
  title: Spring Batch 5.1 Actuator API
  description: >-
    Spring Boot Actuator endpoints exposed by Spring Batch 5.1 applications for
    monitoring and managing batch jobs. Provides health checks, metrics, job
    execution status, and step execution details via the Spring Boot Actuator
    infrastructure. These endpoints are available when spring-boot-actuator is
    on the classpath alongside spring-batch-core.
  version: 5.1.0
  contact:
    name: Spring Team
    url: https://spring.io/team
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
  - url: http://localhost:8080/actuator
    description: Local Spring Boot application with Actuator enabled
tags:
  - name: Batch Jobs
    description: Batch job execution management and monitoring
  - name: Health
    description: Application and component health checks
  - name: Metrics
    description: Micrometer-based application metrics
paths:
  /health:
    get:
      operationId: getHealth
      summary: Get Application Health
      description: >-
        Returns the health status of the Spring Batch application including
        database connectivity and batch job health indicators.
      tags:
        - Health
      responses:
        '200':
          description: Application is healthy
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HealthResponse'
        '503':
          description: Application is unhealthy
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HealthResponse'
  /health/batch:
    get:
      operationId: getBatchHealth
      summary: Get Batch Health
      description: >-
        Returns health status specific to Spring Batch, including job repository
        connectivity and last job execution status.
      tags:
        - Health
      responses:
        '200':
          description: Batch subsystem is healthy
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ComponentHealth'
  /metrics:
    get:
      operationId: listMetrics
      summary: List Available Metrics
      description: >-
        Returns a list of all available metric names collected by Micrometer,
        including Spring Batch job and step metrics.
      tags:
        - Metrics
      responses:
        '200':
          description: List of available metrics
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MetricsList'
  /metrics/{metricName}:
    get:
      operationId: getMetric
      summary: Get Metric Value
      description: >-
        Returns measurements for a specific metric. Spring Batch 5.1 exposes
        metrics under the spring.batch namespace including job duration,
        step duration, read count, write count, and skip count.
      tags:
        - Metrics
      parameters:
        - name: metricName
          in: path
          required: true
          description: >-
            Name of the metric (e.g., spring.batch.job.duration,
            spring.batch.step.duration, spring.batch.chunk.size)
          schema:
            type: string
            example: spring.batch.job.duration
        - name: tag
          in: query
          required: false
          description: Tag filter in the form name:value (can be repeated)
          schema:
            type: string
            example: job.name:importUserJob
      responses:
        '200':
          description: Metric measurements
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MetricDetail'
        '404':
          description: Metric not found
  /batch/jobs:
    get:
      operationId: listBatchJobs
      summary: List Batch Jobs
      description: >-
        Returns all registered Spring Batch jobs in the application context
        with their current status and last execution information.
      tags:
        - Batch Jobs
      responses:
        '200':
          description: List of batch jobs
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BatchJobList'
  /batch/jobs/{jobName}:
    get:
      operationId: getBatchJob
      summary: Get Batch Job Details
      description: >-
        Returns details for a specific batch job including its current
        configuration and execution history summary.
      tags:
        - Batch Jobs
      parameters:
        - name: jobName
          in: path
          required: true
          description: Name of the batch job
          schema:
            type: string
            example: importUserJob
      responses:
        '200':
          description: Job details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BatchJobDetail'
        '404':
          description: Job not found
  /batch/jobs/{jobName}/executions:
    get:
      operationId: listJobExecutions
      summary: List Job Executions
      description: >-
        Returns execution history for a specific batch job, including start time,
        end time, status, and exit code for each execution.
      tags:
        - Batch Jobs
      parameters:
        - name: jobName
          in: path
          required: true
          description: Name of the batch job
          schema:
            type: string
            example: importUserJob
        - name: page
          in: query
          required: false
          description: Page number (zero-based)
          schema:
            type: integer
            default: 0
        - name: size
          in: query
          required: false
          description: Number of executions per page
          schema:
            type: integer
            default: 20
      responses:
        '200':
          description: Job execution history
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JobExecutionPage'
  /batch/jobs/{jobName}/instances:
    get:
      operationId: listJobInstances
      summary: List Job Instances
      description: >-
        Returns job instances for a specific batch job. Each instance represents
        a unique set of job parameters.
      tags:
        - Batch Jobs
      parameters:
        - name: jobName
          in: path
          required: true
          description: Name of the batch job
          schema:
            type: string
        - name: page
          in: query
          required: false
          schema:
            type: integer
            default: 0
        - name: size
          in: query
          required: false
          schema:
            type: integer
            default: 20
      responses:
        '200':
          description: Job instances
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JobInstancePage'
components:
  schemas:
    HealthResponse:
      type: object
      description: Overall application health status
      properties:
        status:
          type: string
          description: Health status
          enum:
            - UP
            - DOWN
            - OUT_OF_SERVICE
            - UNKNOWN
        components:
          type: object
          description: Health of individual components
          additionalProperties:
            $ref: '#/components/schemas/ComponentHealth'
    ComponentHealth:
      type: object
      description: Health status of a single component
      properties:
        status:
          type: string
          description: Component health status
          enum:
            - UP
            - DOWN
            - OUT_OF_SERVICE
            - UNKNOWN
        details:
          type: object
          description: Additional details about the component health
          additionalProperties: true
    MetricsList:
      type: object
      description: List of available metric names
      properties:
        names:
          type: array
          description: Available metric names
          items:
            type: string
          example:
            - spring.batch.job.duration
            - spring.batch.step.duration
            - spring.batch.chunk.size
            - spring.batch.item.read
            - spring.batch.item.write
    MetricDetail:
      type: object
      description: Detail for a specific metric
      properties:
        name:
          type: string
          description: Metric name
        description:
          type: string
          description: Human-readable metric description
        baseUnit:
          type: string
          description: Base measurement unit
        measurements:
          type: array
          description: Metric measurements
          items:
            type: object
            properties:
              statistic:
                type: string
                description: Statistic type (COUNT, TOTAL, MAX, VALUE)
              value:
                type: number
                description: Measurement value
        availableTags:
          type: array
          description: Available tag dimensions for filtering
          items:
            type: object
            properties:
              tag:
                type: string
              values:
                type: array
                items:
                  type: string
    BatchJobList:
      type: object
      description: List of registered batch jobs
      properties:
        jobs:
          type: array
          items:
            $ref: '#/components/schemas/BatchJobSummary'
    BatchJobSummary:
      type: object
      description: Summary of a batch job
      properties:
        name:
          type: string
          description: Job name
          example: importUserJob
        status:
          type: string
          description: Last execution status
          enum:
            - COMPLETED
            - STARTING
            - STARTED
            - STOPPING
            - STOPPED
            - FAILED
            - ABANDONED
            - UNKNOWN
        lastExecutionTime:
          type: string
          format: date-time
          description: Timestamp of the last execution
    BatchJobDetail:
      type: object
      description: Detailed information about a batch job
      properties:
        name:
          type: string
          description: Job name
        stepNames:
          type: array
          description: Names of steps in this job
          items:
            type: string
        executionCount:
          type: integer
          description: Total number of executions
        lastExecution:
          $ref: '#/components/schemas/JobExecution'
    JobExecutionPage:
      type: object
      description: Paginated list of job executions
      properties:
        content:
          type: array
          items:
            $ref: '#/components/schemas/JobExecution'
        page:
          type: integer
          description: Current page number
        size:
          type: integer
          description: Page size
        totalElements:
          type: integer
          description: Total number of executions
        totalPages:
          type: integer
          description: Total number of pages
    JobExecution:
      type: object
      description: A single job execution record
      properties:
        id:
          type: integer
          format: int64
          description: Execution ID
        jobId:
          type: integer
          format: int64
          description: Job instance ID
        jobName:
          type: string
          description: Name of the job
        startTime:
          type: string
          format: date-time
          description: Execution start time
        endTime:
          type: string
          format: date-time
          description: Execution end time
        status:
          type: string
          description: Batch status
          enum:
            - COMPLETED
            - STARTING
            - STARTED
            - STOPPING
            - STOPPED
            - FAILED
            - ABANDONED
            - UNKNOWN
        exitCode:
          type: string
          description: Exit code (COMPLETED, FAILED, etc.)
        exitDescription:
          type: string
          description: Exit message or error description
        jobParameters:
          type: object
          description: Parameters used for this execution
          additionalProperties:
            type: string
        stepExecutions:
          type: array
          description: Step execution details
          items:
            $ref: '#/components/schemas/StepExecution'
    StepExecution:
      type: object
      description: Execution details for a single step
      properties:
        id:
          type: integer
          format: int64
          description: Step execution ID
        stepName:
          type: string
          description: Name of the step
        status:
          type: string
          description: Step status
          enum:
            - COMPLETED
            - STARTING
            - STARTED
            - STOPPING
            - STOPPED
            - FAILED
            - ABANDONED
            - UNKNOWN
        readCount:
          type: integer
          description: Number of items read
        writeCount:
          type: integer
          description: Number of items written
        commitCount:
          type: integer
          description: Number of commits
        rollbackCount:
          type: integer
          description: Number of rollbacks
        readSkipCount:
          type: integer
          description: Number of items skipped during read
        processSkipCount:
          type: integer
          description: Number of items skipped during processing
        writeSkipCount:
          type: integer
          description: Number of items skipped during write
        filterCount:
          type: integer
          description: Number of items filtered
        startTime:
          type: string
          format: date-time
          description: Step start time
        endTime:
          type: string
          format: date-time
          description: Step end time
        exitCode:
          type: string
          description: Step exit code
        exitDescription:
          type: string
          description: Step exit message
    JobInstancePage:
      type: object
      description: Paginated list of job instances
      properties:
        content:
          type: array
          items:
            $ref: '#/components/schemas/JobInstance'
        page:
          type: integer
        size:
          type: integer
        totalElements:
          type: integer
        totalPages:
          type: integer
    JobInstance:
      type: object
      description: A job instance representing a unique set of job parameters
      properties:
        id:
          type: integer
          format: int64
          description: Job instance ID
        jobName:
          type: string
          description: Job name
        jobKey:
          type: string
          description: Unique key derived from job parameters
        jobParameters:
          type: object
          description: Job parameters for this instance
          additionalProperties:
            type: string