Develop Reference

SQLite dialect into Hibernate-Maven project

i am a java student and i have to do a small project. I have to use Maven and Hibernate ( no Spring frameworks). I use IntelliJ as IDE. The thing is that my teacher recomended me to use SQLite as RDBMS because its very simple, 1 file and there is no need to implement a server inside my app. ( i have no idea to do the last point).
The problem is that when i try to do the "hibernate.cfg.xml " i have no way to configure it because of the lack of information. Seems there is no dialect supported from Hibernate and the info i could find on internet is outdated. Any idea on how i can configure it? Do i really need to use another RDBMS ?
there is a picture of my project structure
this is my hibernate.cfg.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">org.sqlite.JDBC</property>
<property name="connection.url">jdbc:sqlite://db/appiculturedb.sqlite3</property>
<property name="connection.username"></property>
<property name="connection.password"></property>
<property name="dialect">org.hibernate.dialect.SQLiteDialect</property>
<property name="hibernate.show_sql">true</property>
<!-- maping with xml-->
<mapping resource="Bodega.hbm.xml" />
<!-- maping with anotations-->
<!-- <mapping class="com.stephane.Bodega" /> -->
</session-factory>
</hibernate-configuration>

After searching for few days, i found that you can use SQLite with Hibernate 5 if you create your own dialect. You also can try to use someone else dialect wich may be risky or outdated. Check this link for more info.
For the moment, hibernate do not support oficially SQLite. Maybe in the future that will change.
If you are searching for an embedded database, you can use H2 wich is supported by Hibernate and seems to be recommended by them.
You also have HSQLDB or Apache Derby.

How to use SSL encryption when connecting Vaadin App with Hibernate to MariaDB on Azure

I am currently working on a Java 8 app with Vaadin and Hibernate which I am trying to migrate to Azure for testing purposes.
Everything worked out so far except for one thing:
When I activate the require SSL option in The MariaDB on Azure, I can't connect anymore:
Caused by: java.sql.SQLException: SSL connection is required. Please specify SSL options and retry.
Unfortunately I didn't write this app myself and I am not too familiar with neither Vaadin nor Hibernate or even Java in general and how to establish ssl or db connections with those.So I need some help:
This is the JDBC Connection string in the Servlet.java file, where for my understanding the db init happens:
Connection con = DriverManager.getConnection("jdbc:mysql://<username>.mariadb.database.azure.com:3306/<db>?autoReconnect=true", "<username>", "<password>");
which I changed by just adding this to the URL: &useSSL=true&requireSSL=true&verifyServerCertificate=true
Now the app doesn't stop at the DB init anymore but still crashes before the page is fully rendered, with the same error message.
I found a hibernate.cfg.xml with the following content (I removed the mappings to keep it shorter):
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Hibernate -->
<property name="hibernate.use_sql_comments">true</property>
<property name="hibernate.format_sql">true</property>
<property name="hibernate.show_sql">false</property>
<property name="hibernate.connection.autocommit">true</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
<!-- Hikari -->
<property name="hibernate.connection.provider_class">com.zaxxer.hikari.hibernate.HikariConnectionProvider</property>
<property name="hibernate.hikari.dataSourceClassName">com.mysql.jdbc.jdbc2.optional.MysqlDataSource</property>
<property name="hibernate.hikari.dataSource.url">jdbc:mysql://dbname.mariadb.database.azure.com:3306/db</property>
<property name="hibernate.hikari.dataSource.user">username</property>
<property name="hibernate.hikari.dataSource.password">password</property>
<property name="hibernate.hikari.dataSource.cachePrepStmts">true</property>
<property name="hibernate.hikari.dataSource.prepStmtCacheSize">250</property>
<property name="hibernate.hikari.dataSource.prepStmtCacheSqlLimit">2048</property>
<property name="hibernate.hikari.dataSource.useServerPrepStmts">true</property>
</session-factory>
</hibernate-configuration>
What do I have to change there to make use of SSL for the connection?

You may try:
<property name="hibernate.hikari.dataSource.url">jdbc:mysql://dbname.mariadb.database.azure.com:3306/db?useSSL=true</property>
Per my understanding, the properties in hibernate.cfg.xml will finally be used to generate a whole connection string. So, if there is no direct property for useSSL, you may add it to the url manually.

Hibernate xml file issue

I have set up Tapestry 5 project and all went fine, until I deployed Hibernate. I have created hibernate.xml file and
<hibernate-configuration>
<session-factory>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost/project</property>
<property name="connection.username">root</property>
<property name="connection.password">password12</property>
<property name="connection.pool_size">5</property>
<!-- Print SQL to stdout. -->
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="use_sql_comments">true</property>
<property name="generate_statistics">true</property>
<property name="hibernate.archive.autodetection">class, hbm</property>
<property name="hibernate.transaction.flush_before_completion">true</property>
<!-- Mapping files TODO: Classify those mappings in exact order and define the relations between them in entities some time later on.-->
<mapping class="rs.project.com.entities.Fruit"/>
<mapping class="rs.project.com.entities.Article"/>
</session-factory>
and it's OK as far as the implementation of it is concerned. However when I deploy the app it defines me some other config, which can be seen on my trace log, and uses some other xml file, based on the mappings it shows me on the log, and it's about some completely different project I used a while ago. The thing is I can't see what's causing such a behavior, and I am really frustrated. I am using Tomcat Apache Catalina and MySQL for Hibernate. Also, I did some research and found out that persistance.xml file is being used in my project.properties which is kinda strange.
persistence.xml.dir=${conf.dir}
Driver for connecting my app to MySQL is jdbc.mysql.driver.So my goal is to possibly define the matter that causes such behavior here with you, and to solve it.
Thanks in advance for your answers.

If your tomcat log is referring to a different project, maybe your context declaration is not right?
Check your contexts directory (for me it's $Tomcat_home\conf\Catalina\localhost) or the Server.xml (if that's what you're using). Make sure that the context file in the contexts directory is pointing to the right directory/project. This error has happened to me before when a previous project had the same context-name as my current one.

Hibernate fails to open Connection with Oracle 11g?

I made a basic JUnit test to set up this Oracle database on my computer with hibernate. The database works and everything, but trying to hook it up to Hibernate is proving to be a challenge. My config file can be here:
The JUnit test is fairly straight forward and I'm sure it should work, but I'm getting this JUnit failure:
org.hibernate.exception.JDBCConnectionException: Cannot open connection
Any ideas what's wrong with it?
Connection properties in Hibernate config file:
<session-factory>
<property name="hibernate.connection.driver_class">
oracle.jdbc.OracleDriver</property>
<property name="hibernate.connection.url">
jdbc:Oracle:thin:#127.0.0.1:8080/slyvronline</property>
<property name="hibernate.connection.username">
YouNoGetMyLoginInfo</property>
<property name="hibernate.connection.password">
YouNoGetMyLoginInfo</property>
<property name="dialect">
org.hibernate.dialect.OracleDialect</property>
<!-- Other -->
<property name="show_sql">true</property>
<property name="hibernate.hbm2ddl.auto">validate</property>
<!-- Mapping files -->
<mapping class="com.slyvr.pojo.Person"/>
</session-factory>

It's unlikely (but possible) your DB is listening on port 8080. Oracle defaults to port 1521. Start there.
(Since it's a connection issue, relevant portions of Hibernate config are useful; I've edited to reflect.)

There are possible two issues in your connection string
first is the port that Dave Newton, second that after port you should add the sid after : not /.
So try this as a solution:
jdbc:Oracle:thin:#127.0.0.1:1521:slyvronline

When you are connecting with oracle, no need to mention the schema name so the connection URL looks like as below
jdbc:oracle:thin:#<hostname>:<port>:<sid>
ex:
jdbc:oracle:thin:#localhost:1521:xe

What can I do with "Could not parse configuration" error from Hibernate?

I am following Java Hibernate tutorial example from YouTube. Everything looks great until I try to run code which is supposed to create table Employee on Apache Derby server. I tried to use SQL server (2008) first and I was getting the same error.
Could not parse configuration: hibernate.cfg.xml and there is also timeout error. I appreciate any help. Thanks.
Here is the error I get:
17:28:51,574 INFO Version:15 - Hibernate Annotations 3.4.0.GA
17:28:51,587 INFO Environment:560 - Hibernate 3.3.2.GA
17:28:51,590 INFO Environment:593 - hibernate.properties not found
17:28:51,594 INFO Environment:771 - Bytecode provider name : javassist
17:28:51,597 INFO Environment:652 - using JDK 1.4 java.sql.Timestamp handling
17:28:51,648 INFO Version:14 - Hibernate Commons Annotations 3.1.0.GA
17:28:51,655 INFO Configuration:1474 - configuring from resource: hibernate.cfg.xml
17:28:51,655 INFO Configuration:1451 - Configuration resource: hibernate.cfg.xml
17:28:51,702 DEBUG DTDEntityResolver:64 - trying to resolve system-id [http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd]
Exception in thread "main" org.hibernate.HibernateException: Could not parse configuration: hibernate.cfg.xml
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1542)
at org.hibernate.cfg.AnnotationConfiguration.doConfigure(AnnotationConfiguration.java:1035)
at org.hibernate.cfg.AnnotationConfiguration.doConfigure(AnnotationConfiguration.java:64)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1476)
at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:1017)
at com.hibernate.chapter1.TestEmployee.main(TestEmployee.java:14)
Caused by: org.dom4j.DocumentException: Connection timed out: connect Nested exception: Connection timed out: connect
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1532)
... 5 more
Here is my hibernate.cfg.xml file:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">org.apache.derby.jdbc.ClientDriver</property>
<property name="connection.url">jdbc:derby://localhost:1527/HibernateDb;create=true</property>
<property name="connection.username">user</property>
<property name="connection.password">password</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">2</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.DerbyDialect</property>
<!-- Enable Hibernate's current session context -->
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">create</property>
</session-factory>
</hibernate-configuration>
And, here is the code I am running:
package com.hibernate.chapter1;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
public class TestEmployee {
public static void main(String[] args) {
AnnotationConfiguration config = new AnnotationConfiguration();
config.addAnnotatedClass(Employee.class);
config.configure("hibernate.cfg.xml");
new SchemaExport(config).create(true, true);
}
}
What did I do wrong?

This means the hibernate.dtd cannot be resolved - its resolution is attempted on the server. The dtd is contained in the jars files - see here and here for how to resolve it.