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Persistence

Part 1: SQL

The following lab is to be completed using the H2 Console. Once you have figured out the correct queries for each step, save a copy in a file called src/main/resources/script.sql. This will be how you submit this assignment. If at any time you need to reset the database, you can restart your Spring Boot server.

Mini Movie Database

Add the following movies to the movies table using an insert statement:

Title Runtime Genre IMDB Score Rating
Howard the Duck 110 Sci-Fi 4.6 PG
Lavalantula 83 Horror 4.7 TV-14
Starship Troopers 129 Sci-Fi 7.2 PG-13
Waltz With Bashir 90 Documentary 8.0 R
Spaceballs 96 Comedy 7.1 PG
Monsters Inc. 92 Animation 8.1 G

Add a few more movies of your choosing.

Create a query to find all movies in the Sci-Fi genre.

Create a query to find all films that scored at least a 6.5 on IMDB

For parents who have young kids, but who don't want to sit through long children's movies, create a query to find all of the movies rated G or PG that are less than 100 minutes long.

Create a query to show the average runtimes of movies rated below a 7.5, grouped by their respective genres.

There's been a data entry mistake; Starship Troopers is actually rated R, not PG-13. Create a query that finds the movie by its title and changes its rating to R.

Show the ID number and rating of all of the Horror and Documentary movies in the database. Do this in only one query.

This time let's find the average, maximum, and minimum IMDB score for movies of each rating.

That last query isn't very informative for ratings that only have 1 entry. use a HAVING COUNT(*) > 1 clause to only show ratings with multiple movies showing.

Let's make our movie list more child-friendly. Delete all entries that have a rating of R. Remember to record your query in script.sql.

Part 2: JDBC

2A: People

Create a PersonService class. These will be used to manipulate the contents of the database given program requirements. Remember to use a JdbcTemplate to provide access to your database. All database access logic and sorting/filtering should be handled by your PersonService and the SQL queries it issues to the database.

You can provide your PersonService to any controller that needs it by marking it as a @Service class and autowiring it into the appropriate controller. Remember that you will also need a corresponding Person class to hold the data in transit. You do not need to use any of the JPA annotations (@ID, @Entity etc.) in your Person class.

Support the following operations:

  • Add a Person to the database
  • Update an existing Person in the database
  • Remove a person from the database
  • remove a list of people from the database
  • find all people with a particular first name, last name, or birthdate
  • Find a single person by ID
  • Generate a map of surnames to lists of people with that surname
  • Generate a map of first names to the number of times they occur.

Create the following REST endpoints to interact with the application. You can use postman to confirm your program's behavior.

  • POST /people -- create a person
  • PUT /people/{id} -- update person with id. 404 error if that person doesn't exist yet
  • GET /people/{id} -- get the person with the specified ID
  • DELETE /people/{id} -- Delete the person with the specified ID
  • GET /people -- get all people in the database
  • GET /people/reverselookup/{mobileNumber} -- find all people with the specified mobile number
  • GET /people/surname/{lastName} -- Find all people with a particular last name
  • GET /people/surname -- Get the result of the surname report above
  • GET /people/firstname/stats -- Get the report of first name frequencies

Homes and People

There is another table in the data base named home that consist of the following fields:

ID ADDRESS HOMENUMBER

People in the 'Person' table are able to have a home from the 'Home' table associated with them. People are mapped to homes through their 'HOME_ID' value which is a foreign key that references the id column in the 'HOME' table

Add the following homes to the 'HOME' table

Address Home Number
36 E. Bayberry Rd.Savannah, GA 31404 565-6895
11 Essex Dr.Farmingdale, NY 11735 454-4544
920 Arlington Street Clifton, NJ 07011 985-4515
234 High Street, PA 19159 267-3940

You may use the query in the 'data-h2.sql' file to populate the 'PERSON' and 'HOME' table

Support the following operations:

  • Add a "Home" to the database
  • Add a person to a home
  • Update an existing 'Home' in the database
  • Remove a home from the database
  • Remove a list of homes from the database
  • Find a home by id
  • Find a home by home number
  • Find a home by address
  • Find a home by person id
  • Generate a list of people that live in a home

List all of the homes that have more that one person that live there. Group people by the home that they live in

List all of the people that live a the address 11 Essex Dr.Farmingdale, NY 11735

Create a query to update a person's home

Create a query to update a person's 'HOMENUMBER"

Find the home number of John Smith

Part 3: JPA

In this section we're going to re-create our service class using JPA.

Start by breaking your PersonService class into an interface and implementation eg: interface PersonService and class JdbcPersonServiceImpl. Place the @Service annotation on the implementation class.

Now create a new class that implements the PersonService, this time with JPA. Once you annotate this class with @Service you will get an error when you start spring -- you can fix this by annotation the service you want to use with @Primary -- This tells Spring that if there are multiple beans competing for autowiring, the one marked with @Primary should be used (this won't work if multiple competing beans are marked @Primary

In your JdbcPersonServiceImpl you used a JdbcTemplate or NamedParameterJdbcTemplate to access the database. In your JpaPersonServiceImpl you will use a PersonRepository instead. You will have to define the interface for this repository, but the Spring Framework will provide the implementation automatically.

Implement all of the methods found in your PersonService interface in this new JPA-based service. You won't have to change your controller at all if you are autowiring a reference to a PersonService - Spring will automatically inject the @Primary-annotated implementation of PersonService

Remember that you won't be using the Jdbc service or any JdbcTemplate objects in this part of the lab.