Add support for PostgreSQL

See spring-projects#636

docker-compose.yml

@@ -13,3 +13,11 @@ services:
       - MYSQL_DATABASE=petclinic
     volumes:
       - "./conf.d:/etc/mysql/conf.d:ro"
+  postgres:
+    image: postgres:14.1
+    ports:
+      - "5432:5432"
+    environment:
+      - POSTGRES_PASSWORD=petclinic
+      - POSTGRES_USER=petclinic
+      - POSTGRES_DB=petclinic

pom.xml

@@ -81,6 +81,11 @@
       <artifactId>mysql-connector-java</artifactId>
       <scope>runtime</scope>
     </dependency>
+    <dependency>
+      <groupId>org.postgresql</groupId>
+      <artifactId>postgresql</artifactId>
+      <scope>runtime</scope>
+    </dependency>
 
     <!-- caching -->
     <dependency>

readme.md

@@ -36,15 +36,17 @@ In its default configuration, Petclinic uses an in-memory database (H2) which
 gets populated at startup with data. The h2 console is automatically exposed at `http://localhost:8080/h2-console`
 and it is possible to inspect the content of the database using the `jdbc:h2:mem:testdb` url.
 
-A similar setup is provided for MySql in case a persistent database configuration is needed. Note that whenever the database type is changed, the app needs to be run with a different profile: `spring.profiles.active=mysql` for MySql.
+A similar setup is provided for MySQL and PostgreSQL in case a persistent database configuration is needed. Note that whenever the database type is changed, the app needs to be run with a different profile: `spring.profiles.active=mysql` for MySQL or `spring.profiles.active=postgres` for PostgreSQL.
 
-You could start MySql locally with whatever installer works for your OS, or with docker:
+You could start MySQL or PostgreSQL locally with whatever installer works for your OS, or with docker:
 
 ```
 docker run -e MYSQL_USER=petclinic -e MYSQL_PASSWORD=petclinic -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=petclinic -p 3306:3306 mysql:5.7.8
+docker run -e POSTGRES_USER=petclinic -e POSTGRES_PASSWORD=petclinic -e POSTGRES_DB=petclinic -p 5432:5432 postgres:14.1
 ```
 
-Further documentation is provided [here](https://github.com/spring-projects/spring-petclinic/blob/main/src/main/resources/db/mysql/petclinic_db_setup_mysql.txt).
+Further documentation is provided for [MySQL](https://github.com/spring-projects/spring-petclinic/blob/main/src/main/resources/db/mysql/petclinic_db_setup_mysql.txt)
+and for [PostgreSQL](https://github.com/spring-projects/spring-petclinic/blob/main/src/main/resources/db/postgres/petclinic_db_setup_postgres.txt).
 
 ## Compiling the CSS
 

src/main/resources/application-postgres.properties

@@ -0,0 +1,6 @@
+database=postgres
+spring.datasource.url=${POSTGRES_URL:jdbc:postgresql://localhost/petclinic}
+spring.datasource.username=${POSTGRES_USER:petclinic}
+spring.datasource.password=${POSTGRES_PASS:petclinic}
+# SQL is written to be idempotent so this is safe
+spring.datasource.initialization-mode=always

src/main/resources/db/postgres/data.sql

@@ -0,0 +1,59 @@
+INSERT INTO vets VALUES (1, 'James', 'Carter');
+INSERT INTO vets VALUES (2, 'Helen', 'Leary');
+INSERT INTO vets VALUES (3, 'Linda', 'Douglas');
+INSERT INTO vets VALUES (4, 'Rafael', 'Ortega');
+INSERT INTO vets VALUES (5, 'Henry', 'Stevens');
+INSERT INTO vets VALUES (6, 'Sharon', 'Jenkins');
+ALTER SEQUENCE vets_id_seq RESTART WITH 7;
+
+INSERT INTO specialties VALUES (1, 'radiology');
+INSERT INTO specialties VALUES (2, 'surgery');
+INSERT INTO specialties VALUES (3, 'dentistry');
+ALTER SEQUENCE specialties_id_seq RESTART WITH 4;
+
+INSERT INTO vet_specialties VALUES (2, 1);
+INSERT INTO vet_specialties VALUES (3, 2);
+INSERT INTO vet_specialties VALUES (3, 3);
+INSERT INTO vet_specialties VALUES (4, 2);
+INSERT INTO vet_specialties VALUES (5, 1);
+
+INSERT INTO types VALUES (1, 'cat');
+INSERT INTO types VALUES (2, 'dog');
+INSERT INTO types VALUES (3, 'lizard');
+INSERT INTO types VALUES (4, 'snake');
+INSERT INTO types VALUES (5, 'bird');
+INSERT INTO types VALUES (6, 'hamster');
+ALTER SEQUENCE types_id_seq RESTART WITH 7;
+
+INSERT INTO owners VALUES (1, 'George', 'Franklin', '110 W. Liberty St.', 'Madison', '6085551023');
+INSERT INTO owners VALUES (2, 'Betty', 'Davis', '638 Cardinal Ave.', 'Sun Prairie', '6085551749');
+INSERT INTO owners VALUES (3, 'Eduardo', 'Rodriquez', '2693 Commerce St.', 'McFarland', '6085558763');
+INSERT INTO owners VALUES (4, 'Harold', 'Davis', '563 Friendly St.', 'Windsor', '6085553198');
+INSERT INTO owners VALUES (5, 'Peter', 'McTavish', '2387 S. Fair Way', 'Madison', '6085552765');
+INSERT INTO owners VALUES (6, 'Jean', 'Coleman', '105 N. Lake St.', 'Monona', '6085552654');
+INSERT INTO owners VALUES (7, 'Jeff', 'Black', '1450 Oak Blvd.', 'Monona', '6085555387');
+INSERT INTO owners VALUES (8, 'Maria', 'Escobito', '345 Maple St.', 'Madison', '6085557683');
+INSERT INTO owners VALUES (9, 'David', 'Schroeder', '2749 Blackhawk Trail', 'Madison', '6085559435');
+INSERT INTO owners VALUES (10, 'Carlos', 'Estaban', '2335 Independence La.', 'Waunakee', '6085555487');
+ALTER SEQUENCE owners_id_seq RESTART WITH 11;
+
+INSERT INTO pets VALUES (1, 'Leo', '2000-09-07', 1, 1);
+INSERT INTO pets VALUES (2, 'Basil', '2002-08-06', 6, 2);
+INSERT INTO pets VALUES (3, 'Rosy', '2001-04-17', 2, 3);
+INSERT INTO pets VALUES (4, 'Jewel', '2000-03-07', 2, 3);
+INSERT INTO pets VALUES (5, 'Iggy', '2000-11-30', 3, 4);
+INSERT INTO pets VALUES (6, 'George', '2000-01-20', 4, 5);
+INSERT INTO pets VALUES (7, 'Samantha', '1995-09-04', 1, 6);
+INSERT INTO pets VALUES (8, 'Max', '1995-09-04', 1, 6);
+INSERT INTO pets VALUES (9, 'Lucky', '1999-08-06', 5, 7);
+INSERT INTO pets VALUES (10, 'Mulligan', '1997-02-24', 2, 8);
+INSERT INTO pets VALUES (11, 'Freddy', '2000-03-09', 5, 9);
+INSERT INTO pets VALUES (12, 'Lucky', '2000-06-24', 2, 10);
+INSERT INTO pets VALUES (13, 'Sly', '2002-06-08', 1, 10);
+ALTER SEQUENCE pets_id_seq RESTART WITH 14;
+
+INSERT INTO visits VALUES (1, 7, '2010-03-04', 'rabies shot');
+INSERT INTO visits VALUES (2, 8, '2011-03-04', 'rabies shot');
+INSERT INTO visits VALUES (3, 8, '2009-06-04', 'neutered');
+INSERT INTO visits VALUES (4, 7, '2008-09-04', 'spayed');
+ALTER SEQUENCE visits_id_seq RESTART WITH 5;

src/main/resources/db/postgres/petclinic_db_setup_postgres.txt

@@ -0,0 +1,19 @@
+===============================================================================
+===     Spring PetClinic sample application - PostgreSQL Configuration     ===
+===============================================================================
+
+--------------------------------------------------------------------------------
+
+1) Run the "docker-compose.yml" from the root of the project:
+
+        $ docker-compose up
+        ...
+        spring-petclinic-postgres-1  | The files belonging to this database system will be owned by user "postgres".
+        ...
+
+2) Run the app with `spring.profiles.active=postgres` (e.g. as a System property via the command
+   line, but any way that sets that property in a Spring Boot app should work). For example use
+
+   mvn spring-boot:run -Dspring-boot.run.profiles=postgres
+
+   To activate the profile on the command line.

src/main/resources/db/postgres/schema.sql

@@ -0,0 +1,56 @@
+-- Wipe everything before creating the tables to make the script idempotent.
+DROP SCHEMA public cascade;
+CREATE SCHEMA public;
+
+CREATE TABLE vets (
+  id         INT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  first_name TEXT,
+  last_name  TEXT
+);
+CREATE INDEX ON vets (last_name);
+
+CREATE TABLE specialties (
+  id   INT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  name TEXT
+);
+CREATE INDEX ON specialties (name);
+
+CREATE TABLE vet_specialties (
+  vet_id       INT NOT NULL REFERENCES vets (id),
+  specialty_id INT NOT NULL REFERENCES specialties (id),
+  UNIQUE (vet_id, specialty_id)
+);
+
+CREATE TABLE types (
+  id   INT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  name TEXT
+);
+CREATE INDEX ON types (name);
+
+CREATE TABLE owners (
+  id         INT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  first_name TEXT,
+  last_name  TEXT,
+  address    TEXT,
+  city       TEXT,
+  telephone  TEXT
+);
+CREATE INDEX ON owners (last_name);
+
+CREATE TABLE pets (
+  id         INT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  name       TEXT,
+  birth_date DATE,
+  type_id    INT NOT NULL REFERENCES types (id),
+  owner_id   INT NOT NULL REFERENCES owners (id)
+);
+CREATE INDEX ON pets (name);
+CREATE INDEX ON pets (owner_id);
+
+CREATE TABLE visits (
+  id          INT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  pet_id      INT NOT NULL REFERENCES pets (id),
+  visit_date  DATE,
+  description TEXT
+);
+CREATE INDEX ON visits (pet_id);