On 10/11/2010 3:40 PM, marshall wrote:
Hi;
This is probably a beginner question, but I thought it was worth posing
because it is frequently very frustrating when working with Maven.
Is there a clear way to know which particular dependencies Maven requires,
when working with a set of jars/libraries?
For example, I have been trying to get JPA and Hibernate configured properly
in the pom.xml. I have tried so many different variations of dependencies
(hibernate, hibernate-core, javax.persistence, JPA, MySQL, etc.) that I finally
just threw up my hands in frustration.
I can get a Hibernate/JPA/MySQL application working just fine without Maven,
but when I try to integrate Maven I'm lost as to which dependencies it needs.
They seem to be different than the jars/libraries I specify in the classpath
for a non-Maven build.
Thanks;
Mar
We use Hibernate and Mysql all the time in Maven and have no problem
specifying the versions
As you can see below, we only need 3 dependencies to get enough to make
it all run and one of them is a connector for MS-SQL which we use
against a remote database at another company.
This POM controls the dependencies of Hibernate and Mysql. It is mostly
exclusions to stop old versions of libraries from being dragged in by
mistake.
It took a bit of doing to get these the first time but it is nice now
that we do not have a screen full of conflicting version notes.
This is used as a dependency of other similar POMs until we get a POM
that contains the major framwork dependencies
"lms-pom-spring-hibernate-mysql-tomcat" which actual applications depend on.
When we want to change the MySQL connector, we only change it here and
rebuild the other POMs to get everyone in synch.
The developer who is building a web service, servlet or portlet has no
concern about the actual versions of the lower level stuff.
He is building with 1.9.1 of our base and gets whatever is supposed to
be there.
We do the same thing for the Apache commons, CXF, Jasper dependencies,
etc. We have about 10 in total.
Most projects only need 5 or fewer dependencies to get everything and
everything is a lot!
lms - Learning Management System - is the application umbrella.
We can usually release these very early in the project since these do
not change very often but we do build a set of SNAPSHOTs to start.
<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/maven-v4_0_0.xsd";>
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>lms-pom-master</artifactId>
<groupId>com.company.lms</groupId>
<version>1.9.1</version>
</parent>
<groupId>com.company.lms</groupId>
<artifactId>lms-pom-hibernate-mysql</artifactId>
<packaging>pom</packaging>
<name>Hibernate-MySQL</name>
<version>1.9.1</version>
<description>Hibernate and MySQL</description>
<properties>
<hibernate.version>3.2.6.ga</hibernate.version>
<mysql-connector-java.version>5.1.10</mysql-connector-java.version>
<jtds.version>1.2.2</jtds.version>
</properties>
<dependencies>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate</artifactId>
<version>${hibernate.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
<exclusion>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
</exclusion>
<exclusion>
<artifactId>asm</artifactId>
<groupId>asm</groupId>
</exclusion>
<exclusion>
<artifactId>cglib</artifactId>
<groupId>cglib</groupId>
</exclusion>
<exclusion>
<artifactId>antlr</artifactId>
<groupId>antlr</groupId>
</exclusion>
<exclusion>
<artifactId>jta</artifactId>
<groupId>javax.transaction</groupId>
</exclusion>
<exclusion>
<artifactId>dom4j</artifactId>
<groupId>dom4j</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-connector-java.version}</version>
</dependency>
<dependency>
<groupId>net.sourceforge.jtds</groupId>
<artifactId>jtds</artifactId>
<version>${jtds.version}</version>
</dependency>
</dependencies>
</project>
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