Problems with jo4neo-persistence.
Stefan Berndt
I'm really new to this persisting framework and have the first problem
by writing a simple test.
here my bean-class:
import jo4neo.Nodeid;
import jo4neo.neo;
import java.util.ArrayList;
import java.util.Collection;
public class Person {
transient Nodeid node;
@neo
String name;
@neo("FRIEND")
Collection<Person> friends=new ArrayList<Person>();
public Person(String name) {
this.name=name;
}
public void addFriend(Person person) {
friends.add(person);
}
}
and my testclass:
package guice;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.kernel.EmbeddedGraphDatabase;
public class PersonTest {
GraphDatabaseService ds;
@Before
public void setup() {
ds = new EmbeddedGraphDatabase("jo4neo_test/db");
}
@Test
public void someFriends() {
Person a = new Person("Tina");
Person b = new Person("Sarah");
a.addFriend(b);
}
@After
public void tearDown() {
ds.shutdown();
}
}
The Problem is, that after passing the test no object or Relationship
was made persistent in the graph.
Unfortunately there is no more detailed tutorial for jo4neo.
Maybe you can give me some hints. Thank you a lot!
Peter Neubauer
it seems you shoudl make sure you call the graph.persist() method in
order to save changes, see
http://code.google.com/p/jo4neo/source/browse/trunk/patterns/userroles/src/main/java/example/Main.java
for an example.
Does that help?
Cheers,
/peter neubauer
COO and Sales, Neo Technology
GTalk: neubauer.peter
Skype peter.neubauer
Phone +46 704 106975
LinkedIn http://www.linkedin.com/in/neubauer
Twitter http://twitter.com/peterneubauer
http://www.neo4j.org - Your high performance graph database.
http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
Stefan Berndt
Ok I've changed my testCase to that:
package guice;
import jo4neo.ObjectGraph;
import jo4neo.ObjectGraphFactory;
import org.junit.Before;
import org.junit.Test;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.kernel.EmbeddedGraphDatabase;
public class PersonTest {
GraphDatabaseService ds;
public void setup() {
ds = new EmbeddedGraphDatabase("jo4neo_test/db");
}
@Test @DbTransactional
Person a = new Person("Tina");
Person b = new Person("Sarah");
a.addFriend(b);
graph.close();
@After
public void tearDown() {
ds.shutdown();
}
}
java.lang.NoClassDefFoundError: org/neo4j/index/IndexService
at jo4neo.impl.ObjectGraphImpl.<init>(ObjectGraphImpl.java:29)
at jo4neo.impl.ObjectGraphProvider.create(ObjectGraphProvider.java:
10)
at jo4neo.ObjectGraphFactory.get(ObjectGraphFactory.java:36)
at guice.PersonTest.setup(PersonTest.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at org.junit.runners.model.FrameworkMethod
$1.runReflectiveCall(FrameworkMethod.java:44)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:
15)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:
41)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:
27)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:
31)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:
70)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:
44)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:180)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:41)
at org.junit.runners.ParentRunner$1.evaluate(ParentRunner.java:173)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:
28)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:
31)
at org.junit.runners.ParentRunner.run(ParentRunner.java:220)
at org.junit.runner.JUnitCore.run(JUnitCore.java:159)
at
com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:
94)
at
com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:
192)
at
com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:
64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:
110)
Caused by: java.lang.ClassNotFoundException:
org.neo4j.index.IndexService
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 30 more
I dont know whats going wrong there. Maybe you can help me.
On 14 Jun., 15:34, Peter Neubauer <peter.neuba...@neotechnology.com>
wrote:
> it seems you shoudl make sure you call the graph.persist() method in
>
> Does that help?
>
> Cheers,
>
> /peter neubauer
>
> COO and Sales, Neo Technology
>
> GTalk: neubauer.peter
> Skype peter.neubauer
> Phone +46 704 106975
> LinkedIn http://www.linkedin.com/in/neubauer
> Twitter http://twitter.com/peterneubauer
>
> On Mon, Jun 14, 2010 at 3:21 PM, Stefan Berndt
>
Peter Neubauer
not sure what your classpath looks like and how you are running this.
Maven or plain Eclipse project?
In any case, this error is due to the missing Neo4j-Index component, so,
if you are maven, include not only the neo4j-kernel but even the
neo4j-index component, similar to
http://code.google.com/p/jo4neo/source/browse/trunk/jo4neo/pom.xml
If you are using plain java, download the Neo4j APOC distribution from
http://wiki.neo4j.org/content/Getting_Started_With_Apoc#Using_a_downloaded_zip.2Ftarball
and include the extracted libs (the index component and Apache Lucene
is among them) into your Java classpath for your project (e.g. in
Eclipse)
Does that help?
Cheers,
/peter neubauer
COO and Sales, Neo Technology
GTalk: neubauer.peter
Skype peter.neubauer
Phone +46 704 106975
LinkedIn http://www.linkedin.com/in/neubauer
Twitter http://twitter.com/peterneubauer
http://www.neo4j.org - Your high performance graph database.
http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
Stefan Berndt
dependency.
now it works and i have to try it out more for my issues. Thx for your
help a lot.
With kind regards,
stefan berndt
On 14 Jun., 16:02, Peter Neubauer <peter.neuba...@neotechnology.com>
wrote:
> Stefan,
> Maven or plain Eclipse project?
>
> In any case, this error is due to the missing Neo4j-Index component, so,
> if you are maven, include not only the neo4j-kernel but even the
>
> If you are using plain java, download the Neo4j APOC distribution fromhttp://wiki.neo4j.org/content/Getting_Started_With_Apoc#Using_a_downl...
> is among them) into your Java classpath for your project (e.g. in
> Eclipse)
>
> Does that help?
>
> Cheers,
>
> /peter neubauer
>
> COO and Sales, Neo Technology
>
> GTalk: neubauer.peter
> Skype peter.neubauer
> Phone +46 704 106975
> LinkedIn http://www.linkedin.com/in/neubauer
> Twitter http://twitter.com/peterneubauer
>
>
Taylor Cowan
http://code.google.com/p/jo4neo/source/browse/trunk/repo/thewebsemantic/jo4neo/0.4.1/jo4neo-0.4.1.pom
When you depend on jo4neo, it should pull in the index for you. Now
that you have the persistence working, there are many tests and some
demo apps that should also be helpful.
Taylor
Stefan Berndt
more what the framework does and how i can use it. thatswhy i have
tried to run your example here:
to see what happens in the graph and to play with it. but i get the
following exception:
15.06.2010 11:40:17
org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog
doInternalRecovery
INFO: Non clean shutdown detected on log [neo_store2/
nioneo_logical.log.1]. Recovery started ...
Exception in thread "main" java.lang.NoClassDefFoundError: org/neo4j/
index/IndexService
at jo4neo.impl.ObjectGraphProvider.create(ObjectGraphProvider.java:
10)
at jo4neo.ObjectGraphFactory.get(ObjectGraphFactory.java:36)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
110)
Caused by: java.lang.ClassNotFoundException:
org.neo4j.index.IndexService
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
but i do have neo-index in my repo and it's jarfiles are also in the
local maven repo:
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-index</artifactId>
<version>1.1-SNAPSHOT</version>
</dependency>
Hope you can help me there. Thank you a lot!
Best regards,
Stefan
Stefan Berndt
(1.0-b1-SNAPSHOT)
with neo4j-index (1.1-SNAPSHOT) this exception occurs:
Exception in thread "main" java.lang.NoSuchMethodError:
org.neo4j.commons.iterator.IteratorUtil.asIterable(Ljava/util/
Iterator;)Ljava/lang/Iterable;
at
org.neo4j.index.lucene.LuceneIndexService.getNodes(LuceneIndexService.java:
337)
at
org.neo4j.index.lucene.LuceneIndexService.getSingleNode(LuceneIndexService.java:
446)
at
org.neo4j.index.lucene.LuceneIndexService.getSingleNode(LuceneIndexService.java:
438)
at jo4neo.impl.LoadOperation.load(LoadOperation.java:312)
at jo4neo.impl.ObjectGraphImpl.getSingle(ObjectGraphImpl.java:124)
at jo4neo.impl.ResultImpl.result(ResultImpl.java:26)
at jo4neo_example.Main.main(Main.java:64)
Peter Neubauer
are you sure you are running even 1.1-SNAPSHOT of the kernel
component, too? The commons package has been moved into the core neo4j
kernel ...
Cheers,
/peter neubauer
COO and Sales, Neo Technology
GTalk: neubauer.peter
Skype peter.neubauer
Phone +46 704 106975
LinkedIn http://www.linkedin.com/in/neubauer
Twitter http://twitter.com/peterneubauer
http://www.neo4j.org - Your high performance graph database.
http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
Taylor Cowan
Sorry we're having some technical difficulties. The easiest thing to
do getting started is add this to your pom
<dependencies>
<dependency>
<groupId>thewebsemantic</groupId>
<artifactId>jo4neo</artifactId>
<version>0.4.2</version>
</dependency>
</dependencies>
0.4.2 is the latest version. Then point to the repo in googlecode...
<repositories>
<repository>
<id>googlecode</id>
<url>http://jo4neo.googlecode.com/svn/trunk/repo</url>
</repository>
</repositories>
The jo4neo dependency will then seek out it's dependencies on neoj4.
I hope that gets you going again.
Peter, can you point me to some guidance on finding a public maven
repo? I think it's time to put this someplace where it can be found
without too much trouble.
Taylor
Peter Neubauer
I can start building jo4neo on http://buildbox.neo4j.org/hudson/ and
add deployment information to the pom.xml in order to automatically
deploy artifacts to http://m2.neo4j.org/ . We are currently working on
getting the artifacts onto our own proper Nexus repository, and
possibly propagated to the central maven repo, and could take jo4neo
along there?
Cheers,
/peter neubauer
COO and Sales, Neo Technology
GTalk: neubauer.peter
Skype peter.neubauer
Phone +46 704 106975
LinkedIn http://www.linkedin.com/in/neubauer
Twitter http://twitter.com/peterneubauer
http://www.neo4j.org - Your high performance graph database.
http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
Peter Neubauer
Cheers,
/peter neubauer
COO and Sales, Neo Technology
GTalk: neubauer.peter
Skype peter.neubauer
Phone +46 704 106975
LinkedIn http://www.linkedin.com/in/neubauer
Twitter http://twitter.com/peterneubauer
http://www.neo4j.org - Your high performance graph database.
http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
Taylor Cowan
Sent from my HTC
Cheers,
/peter neubauer
[The entire original message is not included]