Thursday, March 8, 2012

Spring MVC 3.1 - Implement CRUD with Spring Data Neo4j (Part 5)

Review

We have just completed our application! In the previous sections, we have discussed the functional specs, created the Java classes, declared the configuration files, and wrote the HTML files. In this section, we will build and run the application using Maven, and show how to import the project in Eclipse.


Running the Application

Access the source code

To download the source code, please visit the project's Github repository (click here)

Preparing the data source

  • You don't need to run a separate Neo4j server because it will start simultaneously with the application.
  • There's no need to populate the database.
  • Due to some issues with the initialization service, I have decided to deactivate the service (though it's included in the source code for reference).

Building with Maven

  1. Ensure Maven is installed
  2. Open a command window (Windows) or a terminal (Linux/Mac)
  3. Run the following command:
    mvn tomcat:run
  4. You should see the following output:
    [INFO] Scanning for projects...
    [INFO] Searching repository for plugin with prefix: 'tomcat'.
    [INFO] artifact org.codehaus.mojo:tomcat-maven-plugin: checking for updates from central
    [INFO] artifact org.codehaus.mojo:tomcat-maven-plugin: checking for updates from snapshots
    [INFO] ------------------------------------------
    [INFO] Building spring-neo4j-tutorial Maven Webapp
    [INFO]    task-segment: [tomcat:run]
    [INFO] ------------------------------------------
    [INFO] Preparing tomcat:run
    [INFO] [apt:process {execution: default}]
    [INFO] [resources:resources {execution: default-resources}]
    [INFO] [tomcat:run {execution: default-cli}]
    [INFO] Running war on http://localhost:8080/spring-neo4j-tutorial
    Mar 9, 2012 7:19:07 AM org.apache.catalina.startup.Embedded start
    INFO: Starting tomcat server
    Mar 9, 2012 7:19:07 AM org.apache.catalina.core.StandardEngine start
    INFO: Starting Servlet Engine: Apache Tomcat/6.0.29
    Mar 9, 2012 7:19:07 AM org.apache.catalina.core.ApplicationContext log
    INFO: Initializing Spring root WebApplicationContext
    Mar 9, 2012 7:19:11 AM org.apache.coyote.http11.Http11Protocol init
    INFO: Initializing Coyote HTTP/1.1 on http-8080
    Mar 9, 2012 7:19:11 AM org.apache.coyote.http11.Http11Protocol start
    INFO: Starting Coyote HTTP/1.1 on http-8080
    
  5. Note: If the project will not build due to missing repositories, please enable the repositories section in the pom.xml!

Access the Entry page

  1. Follow the steps with Building with Maven
  2. Open a browser
  3. Enter the following URL (8080 is the default port for Tomcat):
    http://localhost:8080/spring-neo4j-tutorial/

Import the project in Eclipse

  1. Ensure Maven is installed
  2. Open a command window (Windows) or a terminal (Linux/Mac)
  3. Run the following command:
    mvn eclipse:eclipse -Dwtpversion=2.0
  4. You should see the following output:
    [INFO] Scanning for projects...
    [INFO] Searching repository for plugin with prefix: 'eclipse'.
    [INFO] org.apache.maven.plugins: checking for updates from central
    [INFO] org.apache.maven.plugins: checking for updates from snapshots
    [INFO] org.codehaus.mojo: checking for updates from central
    [INFO] org.codehaus.mojo: checking for updates from snapshots
    [INFO] artifact org.apache.maven.plugins:maven-eclipse-plugin: checking for updates from central
    [INFO] artifact org.apache.maven.plugins:maven-eclipse-plugin: checking for updates from snapshots
    [INFO] -----------------------------------------
    [INFO] Building spring-neo4j-tutorial Maven Webapp
    [INFO]    task-segment: [eclipse:eclipse]
    [INFO] -----------------------------------------
    [INFO] Preparing eclipse:eclipse
    [INFO] No goals needed for project - skipping
    [INFO] [eclipse:eclipse {execution: default-cli}]
    [INFO] Adding support for WTP version 2.0.
    [INFO] -----------------------------------------
    [INFO] BUILD SUCCESSFUL
    [INFO] -----------------------------------------
    
    This command will add the following files to your project:
    .classpath
    .project
    .settings
    target
    You may have to enable "show hidden files" in your file explorer to view them
  5. Open Eclipse and import the project

Conclusion

That's it! We've have successfully completed our Spring MVC 3.1 web application. We've learned how to integrate Neo4j using the Spring Data Neo4j framework, and studied how to map our domain objects to the Neo4j graph. We've only explored the basics of Neo4j, but I hope that this simple tutorial will provide a good start.

I hope you've enjoyed this tutorial. Don't forget to check my other tutorials at the Tutorials section.

Revision History


Revision Date Description
1 March 8 2012 Uploaded tutorial
2 March 9 2012 Uploaded source code to Github

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17 comments:

  1. hi krams! thanks a lot... download link seems not working

    ReplyDelete
  2. @Jianjun, my fault. I will be uploading it later. I was at work when I posted the article. Honestly, I didn't expect someone would read this tutorial that quickly.

    ReplyDelete
  3. @Jianjun, I have uploaded the project to Github. I've tested the Maven commands and the project runs as expected.

    ReplyDelete
    Replies
    1. Hi krams, thanks for sharing, really nice articles, help me a lot.
      Currently i am using spring-data-mongodb and spring-data-neo4j together in my project, and now i encounter one problem, it looks like these two spring data mixed up, If you have some spare time, please take a look, any help will be greatly appreciated.

      http://stackoverflow.com/questions/9615913/spring-data-neo4j-and-mogodb-mixed-up

      Delete
  4. I want to calculate the depths between nodes , How can I do this .?

    ReplyDelete
    Replies
    1. @Hamid, I think you will need to check the Neo4j api for this one.

      Delete
  5. I have been trying to get this running but i keep running into the same error when starting tomcat:

    [ERROR] [main 08:58:30] (ContextLoader.java:initWebApplicationContext:312) Context initialization failed
    java.lang.NoClassDefFoundError: org/springframework/beans/factory/NoUniqueBeanDefinitionException
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2521)
    at java.lang.Class.getDeclaredMethods(Class.java:1845)
    at org.springframework.core.type.StandardAnnotationMetadata.hasAnnotatedMethods(StandardAnnotationMetadata.java:136)
    at org.springframework.context.annotation.ConfigurationClassUtils.isLiteConfigurationCandidate(ConfigurationClassUtils.java:105)
    at org.springframework.context.annotation.ConfigurationClassUtils.checkConfigurationClassCandidate(ConfigurationClassUtils.java:86)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:216)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:178)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:617)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:446)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:384)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)

    ReplyDelete
  6. solved it, just needed to update to a newer spring core version

    3.2.1.RELEASE

    this worked for me

    ReplyDelete
  7. hi i have this problem

    [ERROR] [main 03:51:51] (ContextLoader.java:initWebApplicationContext:312) Context initialization failed
    java.lang.NoClassDefFoundError: org/springframework/beans/factory/NoUniqueBeanDefinitionException
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
    at java.lang.Class.getDeclaredMethods(Unknown Source)
    at org.springframework.core.type.StandardAnnotationMetadata.hasAnnotatedMethods(StandardAnnotationMetadata.java:136)
    at org.springframework.context.annotation.ConfigurationClassUtils.isLiteConfigurationCandidate(ConfigurationClassUtils.java:105)
    at org.springframework.context.annotation.ConfigurationClassUtils.checkConfigurationClassCandidate(ConfigurationClassUtils.java:86)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:216)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:178)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:617)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:446)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:384)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4205)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4704)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
    at org.apache.catalina.core.StandardService.start(StandardService.java:525)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
    Caused by: java.lang.ClassNotFoundException: org.springframework.beans.factory.NoUniqueBeanDefinitionException
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
    ... 28 more
    déc. 03, 2013 3:51:54 AM org.apache.coyote.http11.Http11Protocol start
    Infos: Démarrage de Coyote HTTP/1.1 sur http-8080
    déc. 03, 2013 3:51:55 AM org.apache.jk.common.ChannelSocket init
    Infos: JK: ajp13 listening on /0.0.0.0:8009
    déc. 03, 2013 3:51:55 AM org.apache.jk.server.JkMain start
    Infos: Jk running ID=0 time=0/390 config=null
    déc. 03, 2013 3:51:55 AM org.apache.catalina.startup.Catalina start
    Infos: Server startup in 12857 ms

    ReplyDelete
  8. I am getting the same issue as the user above.

    SEVERE: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener
    java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:506)
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:488)
    at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:115)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4909)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5492)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

    ReplyDelete
  9. This comment has been removed by the author.

    ReplyDelete
  10. This comment has been removed by the author.

    ReplyDelete
  11. Hi Krams, I just need one help here, I've seen in most of your tutorials you've used TraceInterceptor class for printing the debug messages. I would really like to know Can I log the error into log file using TraceInterceptor here. I don't want to write private static final Logger logger = Logger.getLogger(TestMain.class); in each and every class. I wish from your file TraceInterceptor traceInterceptor.setEnterMessage and traceInterceptor.setExitMessage, Can we leverage traceInterceptor.setExceptionMessage also to log the exception in log file on the fly. If we overide the following method as @Override
    protected void writeToLog(Log logger, String message, Throwable ex) {
    if (ex != null) {
    logger4J.error(message, ex);
    } else {
    logger4J.debug(message);
    }
    }
    I just want to know in which scenario logger4J.error(message, ex); will execute here.

    Thanks

    ReplyDelete
  12. HI Krams, I am getting this error message:
    Feb 15, 2016 12:10:13 AM org.apache.catalina.core.StandardContext listenerStart
    SEVERE: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener
    java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1308)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1142)
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:518)
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:499)
    at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4734)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5255)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

    Feb 15, 2016 12:10:13 AM org.apache.catalina.core.StandardContext listenerStart
    SEVERE: Skipped installing application listeners due to previous error(s)
    Feb 15, 2016 12:10:13 AM org.apache.catalina.core.StandardContext startInternal
    SEVERE: One or more listeners failed to start. Full details will be found in the appropriate container log file
    Feb 15, 2016 12:10:13 AM org.apache.catalina.core.StandardContext startInternal
    SEVERE: Context [/spring-neo4j-tutorial] startup failed due to previous errors
    Feb 15, 2016 12:10:13 AM org.apache.coyote.AbstractProtocol start
    INFO: Starting ProtocolHandler ["http-nio-8080"]
    Feb 15, 2016 12:10:13 AM org.apache.coyote.AbstractProtocol start
    INFO: Starting ProtocolHandler ["ajp-nio-8009"]
    Feb 15, 2016 12:10:13 AM org.apache.catalina.startup.Catalina start
    INFO: Server startup in 434 ms

    ReplyDelete
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