graph LR
Template_Orchestrator["Template Orchestrator"]
File_Template_Handler["File Template Handler"]
S3_Template_Handler["S3 Template Handler"]
HTTP_Template_Handler["HTTP Template Handler"]
Handler_Validator["Handler Validator"]
AWS_S3["AWS S3"]
Cloud_API_Client_AWS_["Cloud API Client (AWS)"]
Template_Source_External_["Template Source (External)"]
Template_Orchestrator -- "delegates processing to" --> File_Template_Handler
Template_Orchestrator -- "delegates processing to" --> S3_Template_Handler
Template_Orchestrator -- "delegates processing to" --> HTTP_Template_Handler
Template_Orchestrator -- "uploads large templates to" --> AWS_S3
Template_Orchestrator -- "passes processed templates to" --> Cloud_API_Client_AWS_
File_Template_Handler -- "retrieves content from" --> Template_Source_External_
Template_Orchestrator -- "provides configuration to" --> File_Template_Handler
S3_Template_Handler -- "retrieves content from" --> AWS_S3
Template_Orchestrator -- "provides configuration to" --> S3_Template_Handler
HTTP_Template_Handler -- "fetches content from" --> Template_Source_External_
Template_Orchestrator -- "provides configuration to" --> HTTP_Template_Handler
Handler_Validator -- "validates configuration for" --> File_Template_Handler
Handler_Validator -- "validates configuration for" --> S3_Template_Handler
Handler_Validator -- "validates configuration for" --> HTTP_Template_Handler
Handler_Validator -- "ensures input integrity for" --> Template_Orchestrator
The sceptre template processing subsystem is orchestrated by the Template Orchestrator, which acts as the central hub for managing CloudFormation template lifecycle. It delegates the retrieval and initial processing of templates to specialized Template Handlers (File, S3, HTTP) based on the template's source. A Handler Validator ensures the integrity of handler configurations. Once processed, the Template Orchestrator prepares the final template for deployment, interacting with external services like AWS S3 for large template storage and the Cloud API Client (AWS) for actual CloudFormation stack operations. External Template Sources provide the raw template content to the respective handlers.
Serves as the central coordinator for template processing. It determines the appropriate handler based on the template source, orchestrates the retrieval and rendering process, manages the upload of large templates to S3, and prepares the final template body and parameters for deployment.
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Specializes in reading, processing, and rendering CloudFormation templates sourced from local file paths. It supports various templating engines for dynamic content generation.
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Manages the retrieval, processing, and rendering of CloudFormation templates that are stored in Amazon S3 buckets.
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Handles fetching, processing, and rendering CloudFormation templates from remote HTTP or HTTPS URLs.
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Ensures the structural and content validity of configuration data provided for template handlers, enforcing adherence to predefined schemas. This is crucial for maintaining the integrity of template processing inputs.
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An external Amazon Web Services (AWS) component that serves as a storage backend for CloudFormation templates. It is used by the S3 Template Handler for retrieval and by the Template Orchestrator for uploading large templates.
Related Classes/Methods: None
An external client responsible for interacting with the AWS CloudFormation API. It receives the fully processed and prepared template body and parameters from the Template Orchestrator for actual CloudFormation stack deployments.
Related Classes/Methods: None
Represents the various external data sources from which raw template content is retrieved. This includes the local filesystem for file-based templates and remote HTTP/HTTPS endpoints for URL-based templates.
Related Classes/Methods: None