Trying to get a simple example to work

[Gr3y]

Hello

I'm trying to get spring-data-neo4j to work, but aspectj doesnt work it seems.

Did this:
- Made fresh empty simple maven project.
- Converted to AspectJ project.
- Added this POM (as described in documentation):

<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.test</groupId>
  <artifactId>simple-maven-spring-data-neo4j-test</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>Test1</name>
  <description>Trying to get SDN to work in a simple Maven project</description>
  
  <repositories>
  	<repository>
    	<id>spring-maven-milestone</id>
    	<name>Springframework Maven Repository</name>
    	<url>http://maven.springframework.org/milestone</url>
	</repository>
  </repositories>
  
  <dependencies>
	<dependency>
	    <groupId>org.springframework.data</groupId>
	    <artifactId>spring-data-neo4j</artifactId>
	    <version>2.0.0.RC1</version>
	</dependency>
	
	<dependency>
	    <groupId>org.aspectj</groupId>
	    <artifactId>aspectjrt</artifactId>
	    <version>1.6.12</version>
	</dependency>
  </dependencies>
  <build>
  	<plugins>
  		<plugin>
		    <groupId>org.codehaus.mojo</groupId>
		    <artifactId>aspectj-maven-plugin</artifactId>
		    <version>1.2</version>
		    <dependencies>
		        <!-- NB: You must use Maven 2.0.9 or above or these are ignored (see MNG-2972) -->
		        <dependency>
		            <groupId>org.aspectj</groupId>
		            <artifactId>aspectjrt</artifactId>
		            <version>1.6.12</version>
		        </dependency>
		        <dependency>
		            <groupId>org.aspectj</groupId>
		            <artifactId>aspectjtools</artifactId>
		            <version>1.6.12</version>
		        </dependency>
		    </dependencies>
		    <executions>
		        <execution>
		            <goals>
		                <goal>compile</goal>
		                <goal>test-compile</goal>
		            </goals>
		        </execution>
		    </executions>
		    <configuration>
		        <outxml>true</outxml>
		        <aspectLibraries>
		            <aspectLibrary>
		                <groupId>org.springframework</groupId>
		                <artifactId>spring-aspects</artifactId>
		            </aspectLibrary>
		            <aspectLibrary>
		                <groupId>org.springframework.data</groupId>
		                <artifactId>spring-data-neo4j</artifactId>
		            </aspectLibrary>
		        </aspectLibraries>
		        <source>1.6</source>
		        <target>1.6</target>
		    </configuration>
		</plugin>
  	</plugins>
  </build>
</project>

Now there is an error in the documentation (http://static.springsource.org/sprin.../html/#d0e2885). In the plugin section there is a reference to spring-datastore-neo4j. There is no such thing - its "spring-data-neo4j". Also, why use 1.2 of the aspectj-maven-plugin when there is a 1.4?

- I then made a simple entity:

package org.test.simplemaven;

import org.springframework.data.neo4j.annotation.NodeEntity;

@NodeEntity
public class TestEntity {
	private String blah;
}

- and something to run it:

package org.test.simplemaven;

public class App {
	public static void main(String args) {
		TestEntity te = new TestEntity();
		te.persist();
	}
}

Now both STS and a "mvn clean compile" complains that there is no such thing as persist().
Here is the error:

[INFO] 1error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.539s
[INFO] Finished at: Tue Nov 15 21:37:05 CET 2011
[INFO] Final Memory: 10M/81M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.1:compile (default-compile) on project simple-maven-spring-data-neo4j-test: Compilation failure
[ERROR] /workspace/simple-maven-spring-data-neo4j-test/src/main/java/org/test/simplemaven/App.java:[6,4] cannot find symbol
[ERROR] symbol  : method persist()
[ERROR] location: class org.test.simplemaven.TestEntity

Whats up?

[MichaelHunger]

You've added a dependency to spring-data-neo4j which since 2.0 contains the core + non-aspectj mapping mode.

If you want to have the aspectj-mapping mode you have to depend on spring-data-neo4j-aspects. (this is also wrong in this part of the docs)

We had some nasty bugs with the newer AJ maven plugins, that's why it is still 1.2

Thanks for pointing out the documentation issue.

Cheers

Michael

[Gr3y]

Hello again Michael
Thanks for helping.

So I've added the following to pom.xml:

<dependency>
	<groupId>org.springframework.data</groupId>
	<artifactId>spring-data-neo4j-aspects</artifactId>
	<version>2.0.0.RC1</version>
</dependency>

Everything else remains the same.

Unfortunately it didn't help.

I checked the pom dependency hirarchy, and spring-data-neo4j-aspects is being referenced ok.

My "TestEntity" class however, has no injected aspects.
And persist() still doesn't work.

Does it work in your end if you follow my example steps?

I'll try in STS 2.7.x tomorrow.

[Gr3y]

Tried some further tests with spring-data-neo4j (sdn) and spring-data-neo4j-aspects (snda)

One seems to exclude the other. If I force spring-data-neo4j-aspects (sdna) to be on the buildpath, then sdn gets removed, and then stuff annotated with @NoteEntity breaks, because the NodeEntity class is no longer available.

spring-aspects and sdn is in the buildpath by default (even with sdn removed from the pom)

Also tested with STS 2.7.2: Didn't work either.

[MichaelHunger]

spring-data-neo4j-aspects has a transitive dependency to spring-data-neo4j, so it should be pulled in automatically.

I'll look into it.

Cheers

Michael

[Gr3y]

Yeah I realize that. I noticed from the dependecy hirarchy.
It was only a test to try to force sdn and sdna to coexist.

[c-fly]

I had a very similar problem (only a few threads away).

By changing

  
   <aspectLibrary>
        <groupId>org.springframework.data</groupId>
	<artifactId>spring-data-neo4j</artifactId>
   </aspectLibrary>

to

  
   <aspectLibrary>
        <groupId>org.springframework.data</groupId>
	<artifactId>spring-data-neo4j-aspects</artifactId>
   </aspectLibrary>

it fixed my (similar sounding) problem.

[Gr3y]

Hey c-fly.

EDIT:
Deleted old reply. Didn't notice that you were talking about <aspectLibrary>.

Your fix worked. Thank you both for your time!

Awesome, can finally get going.

[MichaelHunger]

Sorry, I assumed you changed it in both places.

I updated the docs to reflect that. Thanks again for pointing it out.

Cheers

Michael