Fixes for the cloud (#35)

Author: manojdbos

src/main/java/dev/dbos/transact/database/SystemDatabase.java

@@ -462,6 +462,26 @@ public static DataSource createDataSource(DBOSConfig config, String dbName) {
         return new HikariDataSource(hikariConfig);
     }
 
+    public static DataSource createPostgresDataSource(DBOSConfig config) {
+        HikariConfig hikariConfig = new HikariConfig();
+
+        String dburl = config.getUrl();
+
+        dburl = String.format("jdbc:postgresql://%s:%d/%s",
+                config.getDbHost(),
+                config.getDbPort(),
+                Constants.POSTGRES_DEFAULT_DB);
+
+        String dbUser = config.getDbUser();
+        String dbPassword = config.getDbPassword();
+        hikariConfig.setJdbcUrl(dburl);
+        hikariConfig.setUsername(dbUser);
+        hikariConfig.setPassword(dbPassword);
+
+        hikariConfig.setMaximumPoolSize(2);
+        return new HikariDataSource(hikariConfig);
+    }
+
     public static DataSource createDataSource(DBOSConfig config) {
         return createDataSource(config, null);
     }

src/main/java/dev/dbos/transact/migrations/MigrationManager.java

@@ -63,7 +63,7 @@ public static void runMigrations(DBOSConfig dbconfig) {
     }
 
     public static void createDatabaseIfNotExists(DBOSConfig config, String dbName) {
-        DataSource adminDS = SystemDatabase.createDataSource(config, Constants.POSTGRES_DEFAULT_DB);
+        DataSource adminDS = SystemDatabase.createPostgresDataSource(config);
         try {
             try (Connection conn = adminDS.getConnection();
                     PreparedStatement ps = conn

src/test/java/dev/dbos/transact/workflow/WorkflowMgmtTest.java

@@ -43,6 +43,8 @@ static void onetimeSetup() throws Exception {
 
         WorkflowMgmtTest.dbosConfig = new DBOSConfig.Builder().name("systemdbtest")
                 .url("jdbc:postgresql://localhost:5432/dbos_java_sys").dbUser("postgres")
+                .dbHost("localhost")
+                .dbPort(5432)
                 .sysDbName("dbos_java_sys").maximumPoolSize(2).build();
     }