Processing data-centric business models

A computer program product for use at a computer system including a model execution engine for executing codeless software applications, the computer system communicatively coupled to one or more data stores, the model execution engine configured to understand application models that commingle data models along with business logic models in metadata within the application models, the computer program product for implementing a method for executing a codeless software application in response to receiving an event to apply business logic contained within a business logic rule to data in the one or more data stores, the computer-program product comprising one or more computer-readable storage media having stored thereon computer-executable instructions that, when executed by a processor, cause the computer system to perform the following:

• access a application model for a codeless software application, the application model containing metadata representing a data model and containing metadata representing a business logic model for the codeless application such that the codeless application is constructed entirely in metadata, the data model including a schema representing data formats for data in a data store, the business logic model including business logic rules for applying business logic to data entities contained in the data store, the metadata representing the business logic model declaring how business logic rules for the codeless application are to operate, the business logic model including an index tree of one or more business logic rules represented in the meta-data of the business logic model, each business logic rule in the index tree identifying at least one data entity to which the business logic rule applies;
• receive an event related to data in the data store, the event including an identifier identifying a data entity in the data store;
• identify the data entity corresponding to the received event based on the identifier;
• scan the index tree to identify a business logic rule that is applicable to the identified data entity;
• invoke the model execution engine to apply the business logic of the indentified business logic rule to the identified data entity, applying the business logic of the identified business logic rule including:
• establish a context for evaluating the identified business logic rule, including fetching any additional data entities based on the conditions of the identified business logic rule;
• evaluate the conditions of the business logic rules in accordance with the established context;
• and
• apply any appropriate business logic in the business logic rule to the identified data entity as a result of the conditions of the business logic rule being satisfied such that execution of the codeless application is based on metadata contained in the application model.

A computer system, comprising

• one or more processors;
• system memory;
• and
• one or more computer-readable storage media having stored thereon computer-executable instructions representing a model execution engine, the model execution engine configured to:
• understand application models for codeless applications, the application models commingling data models along with business logic models in metadata within the application models, the data models including schema for model data in data stores, the business logic models applying business logic rules to data entities contained in data stores, the metadata representing the business logic model being at least partially contained in declarative macros that declare how business logic rules for the codeless application are to operate;
• access an application model for a codeless application, the application model including a data model for a data store and a business logic model for interacting with data entities contained in the data store, the business logic model associated with an index tree of one or more business logic rules represented in the business logic model, each business logic rule in the index tree identifying at least one data entity in the data store that is affected by the business logic rule;
• receive an event related to data in the data store, the event including an identifier identifying a data entity in the data store;
• identify a data entity corresponding to the received event based on the identifier;
• scan the index tree to identify a business logic rule that is applicable to the identified data entity;
• apply the business logic of the indentified business logic rule to the identified data entity, applying the business logic of the indentified business rule including:
• establishing a context for evaluating the identified business logic rule, including fetching any additional data entities based on the conditions of the identified business logic rule;
• evaluating the conditions of the business logic rule in accordance with the established context;
• and
• apply any appropriate business logic in the business logic rule to the identified data entity as a result of the conditions of the business logic rule being satisfied such that execution of the codeless application is based on metadata contained in the application model.