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POWriting a REST webservice with @XmlRootElement
 

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  1. POWriting a REST webservice with @XmlRootElement
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    <p>I'm trying to write a REST webservice in Java (using Netbeans, Glassfish and Jersey).</p> <p>I've written a small app and it works. But then I tried the following:</p> <pre><code>package service; import java.io.IOException; import java.util.logging.Level; import java.util.logging.Logger; import javax.ws.rs.*; import javax.ws.rs.core.Response; import converter.FlyedpConverter; import entities.FlysCombination; @Path("/getdates") public class FlyedpResource { @GET @Path("{date}") @Produces({"application/json"}) public Response get(@PathParam("date") String date) throws IOException { FlysCombination comb = new FlysCombination(); FlysCombination x = FlysCombination.instance(); comb = x.getcomb(date); System.out.println(comb.toString()); if (comb == null) { return Response.status(Response.Status.NOT_FOUND).build(); } return Response.ok(comb).build(); } } </code></pre> <p>My class <code>FlysCombination</code>:</p> <pre><code>package entities; import converter.FlyedpConverter; import java.util.ArrayList; public class FlysCombination { public FlysCombination() {} public static FlysCombination flycomb = null; public static FlysCombination instance() { if (flycomb == null) { flycomb = new FlysCombination(); } return flycomb; } private String session; @SuppressWarnings("rawtypes") private ArrayList combinations = new ArrayList(); public FlysCombination(String session,ArrayList combinations) { this.session=session; this.combinations=combinations; } public ArrayList getcombinations() { return combinations; } public void setcombinations(ArrayList goingthere) { this.combinations = goingthere; } public String getsession() { return session; } public void setsession(String session) { this.session = session; } public FlysCombination getcomb(String a) { FlyedpConverter fly = new FlyedpConverter (a); combinations.add(fly); session="sdjkbsqdjhf"; FlysCombination flycomb = new FlysCombination (session,combinations); return(flycomb); } } </code></pre> <p>And <code>FlyedpConverter</code>:</p> <pre><code>package converter; public class FlyedpConverter { private String keydate; public FlyedpConverter(String keydate) { this.keydate=keydate; } public String getkeydate() { return keydate; } public void setkeydate(String keydate) { this.keydate = keydate; } } </code></pre> <p>I'm getting the following error:</p> <pre><code>Status: 500 (Internal Server Error) javax.ws.rs.WebApplicationException at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:268) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1029) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:941) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:932) at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:384) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:451) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:632) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97) at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57) at com.sun.grizzly.ContextTask.run(ContextTask.java:69) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309) at java.lang.Thread.run(Thread.java:680) </code></pre> <p>I think that the problem is in the <code>@XmlRootElement</code>, I don't know where write it... When I debug, the com variable contains a result, so the problem is in <code>return Response.ok(comb).build();</code> </p> <p>Can someone help me?</p>
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      1. USChristoph Walesch
 

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