Fix DbUtil not being initialized

src/main/java/org/dependencytrack/persistence/migration/MigrationInitializer.java

@@ -20,6 +20,7 @@
 
 import alpine.Config;
 import alpine.common.logging.Logger;
+import alpine.server.util.DbUtil;
 import com.zaxxer.hikari.HikariConfig;
 import com.zaxxer.hikari.HikariDataSource;
 import liquibase.Liquibase;
@@ -40,6 +41,7 @@
 import jakarta.servlet.ServletContextEvent;
 import jakarta.servlet.ServletContextListener;
 import javax.sql.DataSource;
+import java.sql.Connection;
 import java.util.HashMap;
 import java.util.Optional;
 
@@ -73,6 +75,16 @@ public void contextInitialized(final ServletContextEvent event) {
 
         LOGGER.info("Running migrations");
         try (final HikariDataSource dataSource = createDataSource()) {
+            try (final Connection connection = dataSource.getConnection()) {
+                // Ensure that DbUtil#isPostgreSQL will work as expected.
+                // Some legacy code ported over from v4 still uses this.
+                //
+                // NB: This was previously done in alpine.server.upgrade.UpgradeExecutor.
+                //
+                // TODO: Remove once DbUtil#isPostgreSQL is no longer used.
+                DbUtil.initPlatformName(connection);
+            }
+
             runMigration(dataSource);
         } catch (Exception e) {
             if (config.getPropertyAsBoolean(ConfigKey.DATABASE_RUN_MIGRATIONS_ONLY)

src/test/java/org/dependencytrack/PostgresTestContainer.java

@@ -18,13 +18,16 @@
  */
 package org.dependencytrack;
 
+import alpine.server.util.DbUtil;
 import com.github.dockerjava.api.command.InspectContainerResponse;
 import org.dependencytrack.persistence.migration.MigrationInitializer;
 import org.postgresql.ds.PGSimpleDataSource;
 import org.testcontainers.containers.PostgreSQLContainer;
 import org.testcontainers.utility.DockerImageName;
 import org.testcontainers.utility.TestcontainersConfiguration;
 
+import java.sql.Connection;
+
 public class PostgresTestContainer extends PostgreSQLContainer<PostgresTestContainer> {
 
     @SuppressWarnings("resource")
@@ -61,6 +64,13 @@ protected void containerIsStarted(final InspectContainerResponse containerInfo,
         dataSource.setPassword(getPassword());
 
         try {
+            try (final Connection connection = dataSource.getConnection()) {
+                // Ensure that DbUtil#isPostgreSQL will work as expected.
+                // Some legacy code ported over from v4 still uses this.
+                // TODO: Remove once DbUtil#isPostgreSQL is no longer used.
+                DbUtil.initPlatformName(connection);
+            }
+
             MigrationInitializer.runMigration(dataSource);
         } catch (Exception e) {
             throw new RuntimeException("Failed to execute migrations", e);