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Error MessageBodyReader Resteasy

So, I have a REST application and it looks like this:

@GET @Produces(MediaType.APPLICATION_JSON) @Path("/getpartners") public HashMap<Integer, PartnerEntityDTO> getPartners() throws NamingException { //body }

I applied my REST client using the ResteasyClient infrastructure and looks like the one below according to the documentation

 @GET @Path("/getpartners") @Produces(MediaType.APPLICATION_JSON) HashMap<Integer, PartnerEntityDTO> getPartners();

The thing is, I would like to get the HashMap on the client side from the REST service, and I get it without any problems if I use a browser. But if I use a swing client, than something is wrong. I use this code in my swing client to handle the call and answer.

  //Resteasy client RegisterBuiltin.register(ResteasyProviderFactory.getInstance()); PartnerServiceClientInterface partnerServiceClientInterface = ProxyFactory.create(PartnerServiceClientInterface.class, "http://localhost:8080/dilib/partners"); **//Sources.java:66** String restResponse = partnerServiceClientInterface.getPartners().toString(); JsonParser jsonParser = new JsonParser(); JsonArray partnerDataInJson = jsonParser.parse(restResponse).getAsJsonArray(); int size = partnerDataInJson.size(); Gson gson = new Gson(); HashMap<Integer, PartnerEntityDTO> partnerDataFromServer = new HashMap<Integer, PartnerEntityDTO>(); for(int i = 0; i < size; i++) { PartnerEntityDTO deserializedPartnerEntityDTO = gson.fromJson(partnerDataInJson.get(i), PartnerEntityDTO.class); partnerDataFromServer.put(i, deserializedPartnerEntityDTO); }

Error message:

 Exception in thread "AWT-EventQueue-0" org.jboss.resteasy.client.ClientResponseFailure: Unable to find a MessageBodyReader of content-type application/json and type java.util.HashMap<java.lang.Integer, com.sayusiando.java.dilib.dilibcore.server.entities.core.dto.PartnerEntityDTO> at org.jboss.resteasy.client.core.BaseClientResponse.createResponseFailure(BaseClientResponse.java:522) at org.jboss.resteasy.client.core.BaseClientResponse.createResponseFailure(BaseClientResponse.java:513) at org.jboss.resteasy.client.core.BaseClientResponse.readFrom(BaseClientResponse.java:414) at org.jboss.resteasy.client.core.BaseClientResponse.getEntity(BaseClientResponse.java:376) at org.jboss.resteasy.client.core.BaseClientResponse.getEntity(BaseClientResponse.java:349) at org.jboss.resteasy.client.core.extractors.BodyEntityExtractor.extractEntity(BodyEntityExtractor.java:54) at org.jboss.resteasy.client.core.ClientInvoker.invoke(ClientInvoker.java:120) at org.jboss.resteasy.client.core.ClientProxy.invoke(ClientProxy.java:88) at $Proxy16.getPartners(Unknown Source) at com.sayusiando.java.dilib.client.swing.modules.core.fields.sources.Sources.processPartnerDataFromRESTServer(Sources.java:66) at com.sayusiando.java.dilib.client.swing.modules.core.fields.sources.Sources.initComponents(Sources.java:45) at com.sayusiando.java.dilib.client.swing.modules.core.fields.sources.Sources.<init>(Sources.java:26) at com.sayusiando.java.dilib.client.swing.modules.core.DilibCoreSwingClient.valueChanged(DilibCoreSwingClient.java:155) at javax.swing.JTree.fireValueChanged(JTree.java:2820) at javax.swing.JTree$TreeSelectionRedirector.valueChanged(JTree.java:3191) at javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(DefaultTreeSelectionModel.java:629) at javax.swing.tree.DefaultTreeSelectionModel.notifyPathChange(DefaultTreeSelectionModel.java:1078) at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(DefaultTreeSelectionModel.java:287) at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPath(DefaultTreeSelectionModel.java:170) at javax.swing.JTree.setSelectionPath(JTree.java:1598) at javax.swing.plaf.basic.BasicTreeUI.selectPathForEvent(BasicTreeUI.java:2311) at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3520) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:3459) at java.awt.Component.processMouseEvent(Component.java:6285) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6053) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4651) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4481) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4235) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4481) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643) at java.awt.EventQueue.access$000(EventQueue.java:84) at java.awt.EventQueue$1.run(EventQueue.java:602) at java.awt.EventQueue$1.run(EventQueue.java:600) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98) at java.awt.EventQueue$2.run(EventQueue.java:616) at java.awt.EventQueue$2.run(EventQueue.java:614) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.awt.EventQueue.dispatchEvent(EventQueue.java:613) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

I was looking for this error message, and the Resteasy documentation is a link to parts of Interceptors, but I don’t understand what the problem is.

Thanks for any help in advance!

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1 answer

Is a departure provider in your class? If you are using maven, add this dependency:

  <dependency> <groupId>org.jboss.resteasy</groupId> <artifactId>resteasy-jettison-provider</artifactId> <version>${resteasy.version}</version> </dependency>

Replace ${resteasy.version} with the version you are using.

EDIT:

From the RestEASY documentation :

The type of the returned parameter or method must be common with the string as the key and the type of the JAXB object.

Working test file:

 import org.jboss.resteasy.client.ProxyFactory; import org.jboss.resteasy.core.Dispatcher; import org.jboss.resteasy.mock.MockDispatcherFactory; import org.jboss.resteasy.mock.MockHttpRequest; import org.jboss.resteasy.mock.MockHttpResponse; import org.jboss.resteasy.plugins.server.tjws.TJWSEmbeddedJaxrsServer; import org.junit.AfterClass; import org.junit.BeforeClass; import org.junit.Test; import javax.naming.NamingException; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; import javax.xml.bind.annotation.XmlElement; import javax.xml.bind.annotation.XmlRootElement; import java.util.HashMap; import java.util.Map; import static junit.framework.Assert.assertEquals; public class JsonMapTest { @XmlRootElement public static class PartnerEntityDTO { @XmlElement String name; public PartnerEntityDTO(){} public PartnerEntityDTO(String name){ this.name = name; } } @Path("/") public interface Service { @GET @Produces(MediaType.APPLICATION_JSON) @Path("/getpartners") public Map<String, PartnerEntityDTO> getPartners() throws NamingException; } public static class ServiceImpl implements Service{ public Map<String, PartnerEntityDTO> getPartners() throws NamingException { Map<String, PartnerEntityDTO> map = new HashMap<String, PartnerEntityDTO>(); map.put("1", new PartnerEntityDTO("one")); return map; } } static final TJWSEmbeddedJaxrsServer server = new TJWSEmbeddedJaxrsServer(); @BeforeClass public static void start(){ server.setPort(8080); server.start(); } @AfterClass public static void stop(){ server.stop(); } @Test public void test2() throws Exception { server.getDeployment().getRegistry().addSingletonResource(new ServiceImpl()); String url = "http://localhost:8080"; Service service = ProxyFactory.create(Service.class, url); Map<String, PartnerEntityDTO> partners = service.getPartners(); assertEquals(1, partners.size()); assertEquals("1", partners.keySet().iterator().next()); assertEquals("one", partners.values().iterator().next().name); } @Test public void test() throws Exception { Dispatcher dispatcher = MockDispatcherFactory.createDispatcher(); dispatcher.getRegistry().addSingletonResource(new ServiceImpl()); MockHttpRequest request = MockHttpRequest.get("/getpartners"); MockHttpResponse response = new MockHttpResponse(); dispatcher.invoke(request, response); assertEquals("{\"1\":{\"partnerEntityDTO\":{\"name\":\"one\"}}}", response.getContentAsString()); } }
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Source: https://habr.com/ru/post/1389951/

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