RESTful web service creation tutorial with Java, Eclipse. Apache Tomcat, not working

Question

I'd like to create and run a simple RESTful application on my pc. I'm using Java programming language, on Eclipse Helios IDE, with Apache Tomcat 7 server, on a Microsoft Windows Xp operating system.

I've been trying to replicate the same procedure of this tutorial (from 3 to 3.4 steps) on my pc, but it does not work.

Here's what I did:

• created a Dynamic project on Eclipse, with Apache Tomcat 7 settings

• put my Jersey and jsr311-api-1.0 jar files into the project \WEB-INF\lib\ directory

• copied the code parts from the webpage to my project

• right-clicked on the project, clicked on "Run as -> Run on server"

• tried to reach the http://localhost:8080/de.vogella.jersey.first/rest/hello

But there's what I see:

Why does it not work? What did I do wrong? Why?

Many thanks!

Edit:

Here's what the console says:

25-set-2012 9.35.07 org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Programmi\Java\jdk1.6.0_21\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Programmi/Java/jre6/bin/client;C:/Programmi/Java/jre6/bin;C:/Programmi/Java/jre6/lib/i386;C:\WINDOWS\;C:\WINDOWS\System32;"C:\ApacheMaven\apache-maven-3.0.4\bin";C:\WINDOWS\;C:\WINDOWS\System32;"C:\ApacheMaven\apache-maven-3.0.4\bin";C:\WINDOWS\;C:\WINDOWS\System32;"C:\ApacheMaven\apache-maven-3.0.4\bin";C:\WINDOWS\System32;C:\WINDOWS\;C:\WINDOWS\System32; C:\Programmi\R-Language\R-2.13.1\bin\;C:\Programmi\OpenVPN\bin\; C:\Programmi\Java\jdk1.6.0_21\bin\; "C:\ApacheMaven\apache-maven-3.0.4\bin";;C:\Programmi\eclipseEC;
25-set-2012 9.35.08 org.apache.tomcat.util.digester.SetPropertiesRule begin
AVVERTENZA: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:de.vogella.jersey.first' did not find a matching property.
25-set-2012 9.35.10 org.apache.coyote.AbstractProtocolHandler init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
25-set-2012 9.35.10 org.apache.coyote.AbstractProtocolHandler init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
25-set-2012 9.35.10 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 3459 ms
25-set-2012 9.35.10 org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
25-set-2012 9.35.10 org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.6
25-set-2012 9.35.11 org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: urn:com:sun:jersey:api:view is already defined
25-set-2012 9.35.12 org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: urn:com:sun:jersey:api:view is already defined
25-set-2012 9.35.12 org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: urn:com:sun:jersey:api:view is already defined
25-set-2012 9.35.12 org.apache.catalina.core.ApplicationContext log
INFO: Marking servlet Jersey REST Service as unavailable
25-set-2012 9.35.12 org.apache.catalina.core.StandardContext loadOnStartup
GRAVE: Servlet /de.vogella.jersey.first threw load() exception
java.lang.ClassNotFoundException: javax.servlet.Filter
    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)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1558)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1488)
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:415)
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:397)
    at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1048)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:996)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4741)
    at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5062)
    at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5057)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:619)
25-set-2012 9.35.12 org.apache.coyote.AbstractProtocolHandler start
INFO: Starting ProtocolHandler ["http-bio-8080"]
25-set-2012 9.35.12 org.apache.coyote.AbstractProtocolHandler start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
25-set-2012 9.35.12 org.apache.catalina.startup.Catalina start
INFO: Server startup in 1790 ms

Maybe there's some class missing?

Answer 1

To solve your problem, without using Maven, you need to add JAX-RS facet to your project. What's happening here is that Eclipse is not deploying the right libs to the server. This configuration can be accessed through your project's Properties | Project's Facets.

To be honest I don't know which specific jars to add to make Jersey work, because I use Maven to manage dependencies. So instead of the zip file, I've downloaded the Jersey bundle, and configured the JAX-RS facet with it. The effect of this can be seen on the project's Properties | Deployment Assembly, where Jersey's libs are already configured to be deployed. By the way is there you can manually setup the deployed libs to the server.

But then I remembered why I use Maven to manage dependencies. The bundle does not contain everything it needs to run Jersey. It's missing the asm jar (present in the zip file). So I had to add it to projects build path, and reconfigure de deployment assembly manually....

So, here is a tutorial with Maven, Jersey and Eclipse. Try it and draw your conclusions :)