Dependency Management. Practice Task 1

1. Create Maven multi-module project

You should create multi-module maven project that will define initial structure of online store.

Create new maven project with:

• group ID equal to com.github.YOUR_ACCOUNT_NAME.store, for example: com.github.xSAVIKx.store;
• artifact ID equal to store-root;
• properties section with dependencies versions defined as properties, for example: <jUnit.version>4.12</jUnit.version>;
• dependency management section with pre-defined test dependencies (jUnit, mockito);
• plugin management section with pre-defined configuration of following plugins:
  • [maven-compiler-plugin][maven_compiler_plugin] (java source and target should be 1.8);
  • [maven-source-plugin][maven_source_plugin] (sources should not be attached to artifacts);
  • [maven-javadoc-plugin][maven_javadoc_plugin] (javadocs should be generated for public members only).
• filled description tag with valuable project description;
• filled URL, licenses, developers, sections;

See [POM reference][pom_reference] for additional information about POM file structure.

To find correct groupId and artifactId of dependencies and plugins, use MVN repository web [search][mvn_repository].

2. Create model module

Create new maven module named model.

Define appropriate classes hierarchy that describes store items and related entities.

Reference classes hierarchy:

• Property fields:
  • Key
  • Value
• Category fields:
  • ID
  • Title
  • Description
• Item fields:
  • ID
  • Title
  • Categories
  • Price
  • Description
  • Properties
• Catalog fields:
  • ID
  • Items
• Basket fields:
  • Items

3. Create storage module

Create new maven module named storage.

Define appropriate Storage interface with Create/Read/Update/Delete(CRUD) methods. Storage interface should use Generics.

Storage methods should be based on ID field of entities:

• ID field of entity should be filled or generated
• read operation could be performed only using ID field
• update operation could be performed only on item with filled ID field
• delete operation could be performed only using ID field

4. Create api module

Create new maven module named api.

Define appropriate number of Store API interfaces that provides API to access/modify shop entities:

• CategoryRepository
• PropertyRepository
• ItemRepository
• CatalogRepository
• BasketApi

All repositories should have following methods:

• saveOrUpdate
• find
• remove
• getAll

Basket API should have following methods:

• add Item
• getLast n items
• remove Item
• checkout - return all items with their amount and cleanup basket

Repositories should use Storage to get/read/update/delete items.

Create reference implementation of each Store API interface.

Create jUnit tests for your APIs.

5. Create in-memory-storage module

Create new module named in-memory-storage.

Create new implementation of Storage interface that will store all items in in-memory cache.

Create jUnit tests for your implementation.

6. Create demo implementation of your store.

Create demo ConsoleStore implementation, that uses in-memory-storage and handles operations using store api.

User should be able to:

• show all catalogs
  • show all items within catalog
  • show item details
• put item into basket
• remove item/items from basket
• show items in basket
• show last n items that were added to basket
• checkout all items from basket - message with following information should be shown:

#  | Title             |   Amount |       Price
1  | Baby toy          |        3 |          24
2  | Small handmade    |        1 |          99
     butterfly         
                                   Total:   172      

Create jUnit tests for your implementation (you will probably need to add system-rules library to perform IO-related tests).

Configure POM to create executable .jar file (use [maven-shade-plugin][maven_shade_plugin]) [maven_javadoc_plugin]: https://maven.apache.org/plugins/maven-javadoc-plugin/ [maven_source_plugin]: https://maven.apache.org/plugins/maven-source-plugin/ [maven_compiler_plugin]: https://maven.apache.org/plugins/maven-compiler-plugin/ [pom_reference]: https://maven.apache.org/pom.html [mvn_repository]: http://mvnrepository.com [maven_shade_plugin]: https://maven.apache.org/plugins/maven-shade-plugin/