organization changed, added sql connection project

Signed-off-by: Quentin Legot <legotquentin@gmail.com>

build.gradle

@@ -1,40 +1,10 @@
-plugins {
-    id 'java'
-    id 'maven-publish'
-}
+subprojects {
+    apply plugin: 'java'
+    apply plugin: 'maven-publish'
+    sourceCompatibility = JavaVersion.VERSION_17
+    targetCompatibility = JavaVersion.VERSION_17
 
-group "${project.maven_group}"
-version "${project.maven_version}"
-
-repositories {
-    maven {
-        name 'altarik-snapshots'
-        url 'https://repo.altarik.fr/snapshots/'
-    }
-    maven {
-        name 'altarik-releases'
-        url 'https://repo.altarik.fr/releases/'
-    }
-
-    mavenCentral()
-}
-
-dependencies {
-    testImplementation "org.junit.jupiter:junit-jupiter-api:${project.junit_version}"
-    testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:${project.junit_version}"
-}
-
-java {
-    withSourcesJar()
-    withJavadocJar()
-}
-
-
-test {
-    useJUnitPlatform()
-}
-
-publishing {
+    publishing {
         publications {
             mavenJava(MavenPublication) {
                 from components.java
@@ -50,4 +20,18 @@ publishing {
                 }
             }
         }
+    }
+
+    repositories {
+        maven {
+            name 'altarik-snapshots'
+            url 'https://repo.altarik.fr/snapshots/'
+        }
+        maven {
+            name 'altarik-releases'
+            url 'https://repo.altarik.fr/releases/'
+        }
+
+        mavenCentral()
+    }
 }

database/build.gradle

@@ -0,0 +1,24 @@
+plugins {
+    id 'java'
+    id 'maven-publish'
+}
+
+group "${project.maven_group}"
+version "${project.maven_version}"
+
+dependencies {
+    implementation 'org.postgresql:postgresql:42.5.0'
+    testImplementation 'com.google.code.gson:gson:2.10'
+    testImplementation "org.junit.jupiter:junit-jupiter-api:5.9.0"
+    testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:5.9.0"
+}
+
+java {
+    withSourcesJar()
+    withJavadocJar()
+}
+
+test {
+    useJUnitPlatform()
+}
+

database/src/main/java/fr/altarik/toolbox/database/AbstractSqlConnection.java

@@ -0,0 +1,40 @@
+package fr.altarik.toolbox.database;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+public abstract class AbstractSqlConnection implements SqlConnection {
+
+    protected final ConnectionConfig config;
+    protected Connection connection;
+
+    protected AbstractSqlConnection(ConnectionConfig config) throws SQLException {
+        this.config = config;
+        DriverManager.setLoginTimeout(3);
+        connect();
+    }
+
+    public void checkConnection() throws SQLException {
+        if(connection == null || connection.isClosed() || !connection.isValid(1))
+            connect();
+    }
+
+    @Override
+    public Connection getConnection() {
+        return connection;
+    }
+
+    public void closeConnection() {
+        try {
+            if(!connection.isClosed()) {
+                connection.close();
+                connection = null;
+            }
+        } catch(SQLException ignored) {
+            // no op
+        }
+    }
+
+
+}

database/src/main/java/fr/altarik/toolbox/database/ConnectionConfig.java

@@ -0,0 +1,5 @@
+package fr.altarik.toolbox.database;
+
+public record ConnectionConfig(String host, int port, String database, String username, String password) {
+
+}

database/src/main/java/fr/altarik/toolbox/database/Connections.java

@@ -0,0 +1,14 @@
+package fr.altarik.toolbox.database;
+
+import java.sql.SQLException;
+
+public class Connections {
+
+    /**
+     * Create a new Connection object for a postgresql database server
+     * @return
+     */
+    public static SqlConnection newPostgresConnection(ConnectionConfig config) throws SQLException {
+        return new PostgresConnection(config);
+    }
+}

database/src/main/java/fr/altarik/toolbox/database/PostgresConnection.java

@@ -0,0 +1,21 @@
+package fr.altarik.toolbox.database;
+
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+public class PostgresConnection extends AbstractSqlConnection {
+
+    PostgresConnection(ConnectionConfig config) throws SQLException {
+        super(config);
+    }
+
+    @Override
+    public void connect() throws SQLException {
+        String host = config.host();
+        int port = config.port();
+        String username = config.username();
+        String password = config.password();
+        String database = config.database();
+        this.connection = DriverManager.getConnection("jdbc:postgresql://"+ host + ":" + port + "/" + database + "?autoReconnect=true", username, password);
+    }
+}

database/src/main/java/fr/altarik/toolbox/database/SqlConnection.java

@@ -0,0 +1,16 @@
+package fr.altarik.toolbox.database;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+
+public interface SqlConnection {
+
+    void connect() throws SQLException;
+
+    Connection getConnection();
+
+    void checkConnection() throws SQLException;
+
+    void closeConnection();
+
+}

database/src/test/java/fr/altarik/toolbox/database/ConnectionTest.java

@@ -0,0 +1,52 @@
+package fr.altarik.toolbox.database;
+
+import com.google.gson.Gson;
+import org.junit.jupiter.api.Test;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.net.URLConnection;
+import java.sql.PreparedStatement;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+
+
+class ConnectionTest {
+
+    @Test
+    void databaseTest() {
+        assertDoesNotThrow(() -> {
+            InputStream configInput = getResource("config.yml");
+            String configStr = new BufferedReader(new InputStreamReader(Objects.requireNonNull(configInput)))
+                    .lines().collect(Collectors.joining("\n"));
+            Gson gson = new Gson();
+            ConnectionConfig config = gson.fromJson(configStr, ConnectionConfig.class);
+            SqlConnection connection = Connections.newPostgresConnection(config);
+            try(PreparedStatement statement = connection.getConnection().prepareStatement("CREATE TABLE IF NOT EXISTS toolbox(id SERIAL, PRIMARY KEY (id));")) {
+                statement.executeUpdate();
+            }
+        });
+    }
+
+    private InputStream getResource(String resourcePath) {
+        try {
+            URL url = this.getClass().getClassLoader().getResource(resourcePath);
+            if(url == null)
+                return null;
+
+            URLConnection connection = url.openConnection();
+            connection.setUseCaches(false);
+            return connection.getInputStream();
+        } catch (IOException e){
+            return null;
+        }
+    }
+
+
+
+}

database/src/test/resources/config.yml

@@ -0,0 +1,7 @@
+{
+  "host": "127.0.0.1",
+  "port": 5432,
+  "database": "postgres",
+  "username": "postgres",
+  "password": "root"
+}

settings.gradle

@@ -1,2 +1,2 @@
 rootProject.name = 'Toolbox'
-
+include(':tasks', ':database')

tasks/build.gradle

@@ -0,0 +1,21 @@
+plugins {
+    id 'java'
+    id 'maven-publish'
+}
+
+group "${project.maven_group}"
+version "${project.maven_version}"
+
+dependencies {
+    testImplementation "org.junit.jupiter:junit-jupiter-api:${project.junit_version}"
+    testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:${project.junit_version}"
+}
+
+java {
+    withSourcesJar()
+    withJavadocJar()
+}
+
+test {
+    useJUnitPlatform()
+}