Hands-On Software Engineering with Golang

Listing the required set of operations for the data access layer

Following the SOLID design principles we discussed in the previous chapters, we will start designing the link graph data access layer by listing the operations (responsibilities, in SOLID terminology) that it needs to perform and then formally describe them by means of a Go interface.

For our particular use case, the link graph access layer must support the following set of operations:

1. Insert a link into the graph or update an existing link when the crawler discovers that its content has changed.

2. Look up a link by its ID.
3. Iterate all the links present in the graph. This is the primary service that the link graph component must provide to the other components (for example, ...