Hibernate optimistic locking

@Column(name = "VERSION", nullable = false, columnDefinition = "bigint default 0")
@Version()
private Long version;

try {
    spaceShipManager.saveSpaceShip(ship);
} catch (HibernateOptimisticLockingFailureException e) {
    return mapping.findForward("error");
}

Hibernate annotation default column value

@Column(name = "VERSION", nullable = false, columnDefinition = "bigint default 0")
private Long version;

Hibernate bytecode instrumentation (enhance persistent classes) with help of Maven

Is used to enable Hibernate lazy property fetching. "**/model/*" are your persistent classes.

pom.xml:

<plugin>
    <artifactId>maven-antrun-plugin</artifactId>
    <executions>
        <execution>
            <id>Instrument domain classes</id>
            <configuration>
                <tasks>
                    <taskdef name="instrument"
                             classname="org.hibernate.tool.instrument.cglib.InstrumentTask">
                        <classpath>
                            <path refid="maven.dependency.classpath"/>
                            <path refid="maven.plugin.classpath"/>
                        </classpath>
                    </taskdef>
                    <instrument verbose="true">
                        <fileset dir="${project.build.outputDirectory}">
                            <include name="**/model/*.class"/>
                        </fileset>
                    </instrument>
                </tasks>
            </configuration>
            <phase>process-classes</phase>
            <goals>
                <goal>run</goal>
            </goals>
        </execution>
    </executions>
    <dependencies>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate</artifactId>
            <version>3.2.6.ga</version>
        </dependency>
    </dependencies>
</plugin>

Hibernate ddl (database schema) generation with help of Maven

pom.xml:

<plugin>
    <!-- hibernate ddl generation -->
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>hibernate3-maven-plugin</artifactId>
    <version>2.0-alpha-2</version>
    <configuration>
        <components>
            <component>
                <name>hbm2ddl</name>
                <outputDirectory>.</outputDirectory>
            </component>
        </components>
        <componentProperties>
            <configurationfile>src/main/db/hibernate.cfg.xml</configurationfile>
            <drop>false</drop>
            <create>true</create>
            <export>false</export>
            <jdk5>true</jdk5>
            <format>true</format>
        </componentProperties>
    </configuration>
    <executions>
        <execution>
            <id>export-mysql</id>
            <phase>process-classes</phase>
            <goals>
                <goal>hbm2ddl</goal>
            </goals>
            <configuration>
                <componentProperties>
                    <propertyfile>src/main/db/hibernate-mysql.properties</propertyfile>
                    <outputfilename>target/mysql-ddl.sql</outputfilename>
                </componentProperties>
            </configuration>
        </execution>
    </executions>
</plugin>

hibernate.cfg.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
  "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
  "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <!--Annotated classes-->
        <mapping class="com.etymgiko.lyricscollection.model.Artist" />
        <mapping class="com.etymgiko.lyricscollection.model.Song" />
    </session-factory>
</hibernate-configuration>

hibernate-mysql.properties:

# This properties file defines the dialect for the MYSQL database
hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect

Hibernate Spring where clause

public List getSongs(Long artistId) {
return getHibernateTemplate().find("from Song as song where song.artist.id = ?", new Object [] {artistId});
}