Andrew Leer

*bump*

Hello,

I'm reading the book Harnessing Hibernate, and though my project compiles just fine from the command line, I'd like to use it in Eclipse.

The project uses the Maven ANT Tasks, and though I've used both ANT and Maven by themselves with Eclipse, I've never used the Maven ANT Tasks along with Eclipse.

I tried importing my existing project into my eclipse workspace by way of the File -> New -> Project ... and then selecting Java Project from Existing Ant Buildfile, then I select my ANT build file, and I am presented with the following error:

Error occurred creating project

Problem setting the classpath of the project from the javac classpath: Reference dependecy.class.path not found.

The project appears in Eclipse, but there's obviously something wrong.

I've tried adding an environment variable in my project to point to the maven repo (M2_REPO), without any luck, although eclipse appears to acknowledge that the classes withint the jars are present.

Here is the build file from Harnessing Hibernate:

<?xml version="1.0" ?> <project name="Harnessing Hibernate 3 (Developer's Notebook Second Edition)" default="db" basedir="." xmlns:artifact="antlib:org.apache.maven.artifact.ant"> <!-- Set up properties containing important project directories --> <property name="source.root" value="src"/> <property name="class.root" value="classes"/> <property name="data.dir" value="data"/> <artifact:dependencies pathId="dependency.class.path"> <dependency groupId="hsqldb" artifactId="hsqldb" version="1.8.0.7"/> <dependency groupId="org.hibernate" artifactId="hibernate" version="3.2.5.ga"> <exclusion groupId="javax.transaction" artifactId="jta"/> </dependency> <dependency groupId="org.hibernate" artifactId="hibernate-tools" version="3.2.0.beta9a"/> <dependency groupId="org.apache.geronimo.specs" artifactId="geronimo-jta_1.1_spec" version="1.1"/> <dependency groupId="log4j" artifactId="log4j" version="1.2.14"/> </artifact:dependencies> <!-- Setup the class path for compilation and execution --> <path id="project.class.path"> <!-- Include our own classes, of course --> <pathelement location="${class.root}" /> <!-- Add the dependencies classpath --> <path refid="dependency.class.path"/> </path> <!-- Teach Ant how to use the Hibernate Tools --> <taskdef name="hibernatetool" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="project.class.path"/> <target name="db" description="Runs HSQLDB database management UI against the database file--use when application is not running"> <java classname="org.hsqldb.util.DatabaseManager" fork="yes"> <classpath refid="project.class.path"/> <arg value="-driver"/> <arg value="org.hsqldb.jdbcDriver"/> <arg value="-url"/> <arg value="jdbc:hsqldb:${data.dir}/music"/> <arg value="-user"/> <arg value="sa"/> </java> </target> <!-- Generate the java code for all mapping files in our source tree --> <target name="codegen" depends="prepare" description="Generate Java source from the O/R mapping files"> <hibernatetool destdir="${source.root}"> <configuration configurationfile="${source.root}/hibernate.cfg.xml"/> <hbm2java/> </hibernatetool> </target> <!-- Create our runtime subdirectories and copy resources into them --> <target name="prepare" description="Sets up build structures"> <mkdir dir="${class.root}"/> <!-- Copy our property files and O/R mappings for use at runtime --> <copy todir="${class.root}"> <fileset dir="${source.root}" > <include name="**/*.properties"/> <include name="**/*.xml"/> </fileset> </copy> </target> <!-- Generate the schemas for all mapping files in our class tree --> <target name="schema" depends="prepare" description="Generate DB schema from the O/R mapping files"> <hibernatetool destdir="${source.root}"> <configuration configurationfile="${source.root}/hibernate.cfg.xml"/> <hbm2ddl drop="yes" /> </hibernatetool> </target> <!-- Compile the java source of the proejct --> <target name="compile" depends="prepare" description="Compiles all Java classes"> <javac srcdir="${source.root}" destdir="${class.root}" debug="on" optimize="off" deprecation="on"> <classpath refid="project.class.path" /> </javac> </target> <target name="ctest" description="Creates and persists some sample data." depends="compile"> <java classname="com.oreilly.hh.CreateTest" fork="true"> <classpath refid="project.class.path" /> </java> </target> <target name="print-classpath" description="Show the dependency class path"> <property name="class.path" refid="dependency.class.path" /> <echo>${class.path}</echo> </target> </project>

As you can see the dependency.class.path classpath entry that eclipse complained about, is that which specifies the list of dependencies from the maven ant tasks.

I noticed that your forum does book reviews. Can you give me a review of Harnessing Hibernate?
(I mean I realize this will take a while, but if you get around to it...)

Thanks!

Hello and thank you for responding.

I did a diff with the files that came with the book (after I found them) and discovered I had mis-typed a few lines...there's probably nothing to bootstrap it, as in Chapter 2 we are just generating the Java source classes from an .hbm.xml file and also generating the ddl schema for the database.

I'm reading Chapter 2 of Harnessing Hibernate, and when generating my db schema, I get an error that a hibernate dialect has not been set.

drwxr-xr-x 6 leeand00 leeand00 4096 2011-12-16 16:32 . drwxr-xr-x 3 leeand00 leeand00 4096 2011-12-14 17:07 .. -rw-r--r-- 1 leeand00 leeand00 3285 2011-12-16 16:22 build.xml drwxr-xr-x 3 leeand00 leeand00 4096 2011-12-16 16:30 classes drwxr-xr-x 2 leeand00 leeand00 4096 2011-12-14 17:07 data drwxr-xr-x 5 leeand00 leeand00 4096 2011-12-16 14:41 .hg -rw-r--r-- 1 leeand00 leeand00 41 2011-12-16 14:41 .hgignore drwxr-xr-x 3 leeand00 leeand00 4096 2011-12-16 16:12 src
Project Structure

BUILD FAILED /home/leeand00/harnessingHibernate/ch2/example1/build.xml:89: org.hibernate.HibernateException: The dialect was not set. Set the property hibernate.dialect. at org.hibernate.dialect.Dialect.instantiateDialect(Dialect.java:233) at org.hibernate.dialect.Dialect.getDialect(Dialect.java:211) at org.hibernate.dialect.Dialect.getDialect(Dialect.java:226) at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:86) at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:61) at org.hibernate.tool.ant.Hbm2DDLExporterTask.execute(Hbm2DDLExporterTask.java:45) at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:183) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:390) at org.apache.tools.ant.Target.performTasks(Target.java:411) at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1360) at org.apache.tools.ant.Project.executeTarget(Project.java:1329) at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) at org.apache.tools.ant.Project.executeTargets(Project.java:1212) at org.apache.tools.ant.Main.runBuild(Main.java:801) at org.apache.tools.ant.Main.startAnt(Main.java:218) at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280) at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109) Total time: 13 seconds
The Build Error

<?xml version="1.0" ?> <project name="Harnessing Hibernate 3 (Developer's Notebook Second Edition)" default="db" basedir="." xmlns:artifact="antlib:org.apache.maven.artifact.ant"> <!-- Set up properties containing important project directrories --> <property name="source.root" value="src" /> <property name="class.root" value="classes" /> <property name="data.dir" value="data" /> <artifact:dependencies pathId="dependency.classpath"> <dependency groupId="hsqldb" artifactId="hsqldb" version="1.8.0.7" /> <dependency groupId="org.hibernate" artifactId="hibernate" version="3.2.5.ga"> <exclusion groupId="javax.transaction" artifactId="jta" /> </dependency> <dependency groupId="org.hibernate" artifactId="hibernate-tools" version="3.2.0.beta9a"> </dependency> <dependency groupId="org.apache.geronimo.specs" artifactId="geronimo-jta_1.1_spec" version="1.1" /> <dependency groupId="log4j" artifactId="log4j" version="1.2.14" /> </artifact:dependencies> <!-- Setup the class path for compliation and execution --> <path id="project.class.path"> <!-- Include our own classes, of course --> <pathelement location="${classes.root}" /> <!-- Add the dependencies classpath --> <path refid="dependency.classpath" /> </path> <!-- Teach Ant how to use the Hibernate Tools --> <taskdef name="hibernatetool" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="project.class.path" /> ... <!-- Create our runtime subdirectories and copy resources into them --> <target name="prepare" description="Sets up build structres"> <mkdir dir="${class.root}" /> <!-- Copy our property files and O/R mappings for use at runtime --> <copy todir="${class.root}"> <fileset dir="${source.root}"> <include name="**/*.properties" /> <include name="**/*.xml" /> </fileset> </copy> </target> <!-- Generate the schemas for all mapping files in our class tree --> <target name="schema" depends="prepare" description="Generate DB schema from O/R mapping files"> <hibernatetool destdir="${source.root}"> <configuration> <fileset dir="${class.root}"> <include name="**/*.hbm.xml" /> </fileset> </configuration> <hbm2ddl drop="yes" /> </hibernatetool> </target> ...
relevant sections of build.xml

I have my hibernate.properties file in my src (${source.root}) directory, and it is copied over to the classes (${class.root}) directory in the dependent prepare <target> before the schema <target> is run.

It appears to me that hibernate.properties is not being found by hbm2ddl.

Should I be placing this file elsewhere?

I've also downloaded the examples and ended up with the same error, however the example does not appear to come with a hibernate.properties file, so that would be expected.

Does anybody have a list of hosts that support hosting Groovy on Grails / JSP / Tomcat Hosting?

(Preferably cheap)

I don't know what the best place to set that up would be.

Yeah, I was barking up the wrong tree...It's because a telnet session I was running was "too fast" to delete a file before sending the next command (earlier in the script). I used a timeout attribute. This explains the *intermittent nature* of the problem.

When it couldn't download the file, that it needed to my "custom ant script" didn't have the input that it needed and thus I got some obscure error message that had nothing to do with the problem.

Thanks for the help anyway though!

I have a custom ANT task that I have written and placed in a JAR file.

I've defined it at the top like this....

<project> <taskdef name="XebraCodeRelate" classname="com.xebra.HTMLCodeRelate"> <classpath> <pathelement location="../java/jar/XebraAntTasks.jar"/> </classpath> </taskdef> ... </project>
build.xml


But when it reaches the <XebraCodeRelate> it fails for some reason, intermittently.

<project> ... <for list="${csvDownloadList}" param="letter"> <sequential> <XebraCodeRelate fileText="${file.configs.txt}" forFile="@{letter}" property="renameTo" renameFor="upload" /> ... </project>

getSpecifiedHTMLConfig: [echo] Generating and retrieving configs.txt for html configuration: CODVAL3 [telnet] Red Hat Linux release 7.2 (Enigma) [telnet] Kernel 2.4.7-10 on an i686 [telnet] login: [telnet] andy_test [telnet] Password: [telnet] [telnet] [andy_test [telnet] cd /home/andy_test/httpd/HtmlConf/ [telnet] rm -fv configs.txt [telnet] cat /home/andy_test/httpd/cgi-bin/htmlCode.txt | grep CODVAL3 > configs.txt [ftp] getting files [ftp] 0 files retrieved uploadHTML: [loadfile] Do not set property file.configs.txt as its length is 0. [echo] File Contents: [echo] ${file.configs.txt} HTMLCodeRead: Init() End: Init() BEGIN: setMyArg END: setMyArg BEGIN: setProperty END: setProperty BEGIN: execute target name:uploadHTML value of property 'name'null next token: ${file.configs.txt} next sub token: ${file.configs.txt} task name:XebraCodeRead value of task parameter 'arg1' ${file.configs.txt} END: execute [echo] DL List: ${file.configs.txt} HTMLCodeRelate: Init() End: Init() BEGIN: setMyArg END: setMyArg BEGIN: execute BUILD FAILED C:\Custom\M11\CODVAL\dev\build.xml:258: The following error occurred while executing this line: C:\Custom\M11\CODVAL\dev\build.xml:261: java.util.NoSuchElementException

Anybody know why this might be?

I'm using ANT version 1.7.1 compiled on June 27 2008

Thank you,
Andrew J. Leer

I've written a custom ANT task for purposes of returning an associated value from a file (that works almost like a hash map):
"I11_home.htm", "1683" "I11_office_catalog.htm", "1546" "I11_mixed_catalog.htm", "1673" "I11_approve.htm", "527" "I11_reports.htm", "1547" "I11_history.htm", "1548" "I11_settings.htm", "1549" "I11_pricing.htm", "1550" "I11_edit_imprint.htm", "1551" "I11_review_imprint.htm", "1552" "I11_checkout.htm", "1671" "I11_payment.htm", "1567" "I11_confirm.htm", "1556"

The left hand column above contains what the file is currently named. The right hand column above contains what I would like to rename the file to.

It's part of a web-app deployment for a very non-standard ecomm system (read: not Java, and not .NET etc..)

It's my Custom ANT task's job to take an argument of the file name, and return the corresponding file name for ANT to rename it to. In my ANT build.xml file I have
<echo>DL List: ${csvDownloadList}</echo> <for list="${csvDownloadList}" param="letter"> <sequential> <!-- Figureout what the file needs to be renamed to --> <XebraCodeRelate fileText="${file.configs.txt}" forFile="@{letter}" property="renameTo" /> <echo> ------------------------------------- </echo> <echo> Renaming file @{letter} to ${renameTo}</echo> <echo> ------------------------------------- </echo> <move file="@{letter}" tofile="${renameTo}" /> <var name="renameTo" unset="true"/> </sequential> </for>
Note that ${csvDownloadList} looks like this:

1683,1546,1673,527,1547,1548,1549,1550,1551,1552,1671,1567,1556

However for some reason my <for> loop craps out after renaming one file. It seems to have something to do with my Custom ANT Task not being able to work within a <for> loop. Why is this? Is there some other class besides Task I need to extend to make this work?

Stranger still, the build succeeds, it doesn't throw an error or anything.

P.S. I'm using ANT 1.7.1 and ant-contrib-1.0b1.jar

Jeanne,

Thank you for your reply! :-D

Oh and Merry Christmas!

I've been look for the answer to those two for a while!

Hello,

I have a project in Eclipse that I've just checked back into subversion (svn). I have another developer on my team that wishes to check it out into his Eclipse installation, but when he does so, none of the settings from my workspace/project are transfered to his Eclipse instance.

I know that if I want to export the preferences, all I have to do is go to File->Export->Preferences and save that file as an *.epf file.

Importing and Exporting the Preferences covers the location of the JDK, but that isn't what I'm concerned with.

I wish to export/import the following:

a.) The project settings
(which directories contain source code, included jars etc...)

b.) The content of the [I]run external tools...->Ant Build[I] items in the tree.

c.) The layout of the workspace (not too important...)


Thank you,

Andrew J. Leer

I've been reading here in my "Passing the Sun Certified Web Component Developer Exam" that inside a synchronized block is where you ought to put your access to the Session and your access to the ApplicationContext inside a servlet.

Now this would lead me to believe that since SpringMVC is also a servlet-based framework that you should also use a synchronized block when accessing (for just writes?) the user Session and the ApplicationContext.

Am I right about this?

Thank you,
Andrew J. Leer

P.S. (I'm guessing the same is true of any webframework that is servlet-based...like Struts for instance...)

Nah, your right, Arrays.toList does the trick...

Hello,

I was wondering if there was anyway to convert a primitive array of objects into a java.util.Collection of some sort using a taglib.

Thank you,
Andrew J. Leer