I have created one java restful ws with jersey 1.8 library, it is one post operation of a Pojo called Loc and consumes JSON format.
Here is the webservice:
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.hibernate.Session;
import org.hibernate.Transaction;
import persistence.HibernateUtil;
import entities.Loc;
@Path("EnvironmentService")
public class Environment {
@POST
@Path("/post/location")
@Consumes(MediaType.APPLICATION_JSON)
public Response createLocation(Loc location) {
System.out.println("ENTROU NO LOCATION");
Session session = HibernateUtil.openNewSession();
Transaction tx = session.beginTransaction();
session.save(location);
tx.commit();
session.close();
String result = "Location saved";
return Response.status(201).entity(result).build();
}
I want to send the webservice a Loc object:
/**
* Loc is a hibernate enitity class which represents a raw data table for location entries.*/
@Entity
@XmlRootElement
public class Loc implements Serializable {
private static final long serialVersionUID = 1184003645439013748L;
@Id
@GeneratedValue(strategy = GenerationType.TABLE)
private long id;
private double latitude;
private double longitude;
private long time;
private double accuracy;
private String provider;
@Column(name = "yProcessed", nullable = false, columnDefinition = "int default '0'")
private int yProcessed = 0;
@Column(name = "zClass", nullable = false, columnDefinition = "double default 0.0")
private double zClass = 0d;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public double getLatitude() {
return this.latitude;
}
public void setLatitude(double latitude) {
this.latitude = latitude;
}
public double getLongitude() {
return this.longitude;
}
public void setLongitude(double longitude) {
this.longitude = longitude;
}
public long getTime() {
return this.time;
}
public void setTime(long time) {
this.time = time;
}
@Override
public String toString() {
return "latitude: " + latitude + " longitude: " + longitude + "time: "
+ time;
}
public double getAccuracy() {
return accuracy;
}
public void setAccuracy(double accuracy) {
this.accuracy = accuracy;
}
public int getyProcessed() {
return yProcessed;
}
public void setyProcessed(int yProcessed) {
this.yProcessed = yProcessed;
}
public double getzClass() {
return zClass;
}
public void setzClass(double zClass) {
this.zClass = zClass;
}
public String getProvider() {
return provider;
}
public void setProvider(String provider) {
this.provider = provider;
}
}
This is my web.xml file for jersey configuration the jar i am using is 1.8:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>RememberMeServer</display-name>
<servlet>
<servlet-name>Jersey REST Service</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>webservices</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey REST Service</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>
</web-app>
And i am testing this webservice with the postman plugin in chrome.
I give him the following url http://localhost:8080/RememberMeServer/rest/EnvironmentService/post/location
which is correct.
I pass him the following header:
Content-Type application/json
and select raw and JSON type format and send the following JSON code which was gathered using GSON from a Loc object:
{"provider":"network","latitude":39.1237894,"longitude":-9.2501239,"accuracy":34.5,"time":1400957412206}
In the Postman plugin i get that 415: UnsupportedMediaType and in eclipse i get this jersey error:
Mai 25, 2014 12:49:42 PM com.sun.jersey.spi.container.ContainerRequest getEntity
SEVERE: A message body reader for Java class entities.Loc, and Java type class entities.Loc, and MIME media type application/json was not found.
The registered message body readers compatible with the MIME media type are:
application/json ->
com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$App
com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider$App
com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$App
*/* ->
com.sun.jersey.core.impl.provider.entity.FormProvider
com.sun.jersey.core.impl.provider.entity.MimeMultipartProvider
com.sun.jersey.core.impl.provider.entity.StringProvider
com.sun.jersey.core.impl.provider.entity.ByteArrayProvider
com.sun.jersey.core.impl.provider.entity.FileProvider
com.sun.jersey.core.impl.provider.entity.InputStreamProvider
com.sun.jersey.core.impl.provider.entity.DataSourceProvider
com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.ReaderProvider
com.sun.jersey.core.impl.provider.entity.DocumentProvider
com.sun.jersey.core.impl.provider.entity.SourceProvider$StreamSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$SAXSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$DOMSourceReader
com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$General
com.sun.jersey.core.impl.provider.entity.EntityHolderReader
com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider$General
com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$General
Which is weird from what i understand the entities.Loc should be in here somewhere, but it is not.
Some anotations in class Loc are for Hibernate Framework and dont concern the webservice. i think they dont interfere.
i can't figure out how to pass this problem i want to test this webservice first and just after that i go to the client. Does anyone knows how to solve this problem?
EDIT:
here is the request preview in postman:
POST /RememberMeServer/rest/EnvironmentService/post/location HTTP/1.1
Host: localhost:8080
Content-Type: application/json
Cache-Control: no-cache
{"provider":"network","latitude":"39.1237894","longitude":"-9.2501239","accuracy":"34.5","time":"1400957412206"}
EDIT2
When i changed the type to text/plain and the parameter to a string it worked i think the problem is the mapping of the json string to Loc object any help?
EDIT3:
Now i changed the type to string in the post webservice and he receives the json pretty good but how can i do it with a Loc object instead of a string?
EDIT4
By adding Genson has a user sugestion actually changed the error to internal server error here is the stacktrace:
Mai 28, 2014 2:12:26 PM com.sun.jersey.spi.container.ContainerResponse logException
SEVERE: Mapped exception to response: 500 (Internal Server Error)
javax.ws.rs.WebApplicationException: com.owlike.genson.JsonBindingException: Could not deserialize to type class java.lang.String
at com.owlike.genson.ext.jaxrs.GensonJsonConverter.readFrom(GensonJsonConverter.java:127)
at com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:490)
at com.sun.jersey.server.impl.model.method.dispatch.EntityParamDispatchProvider$EntityInjectable.getValue(EntityParamDispatchProvider.java:123)
at com.sun.jersey.server.impl.inject.InjectableValuesProvider.getInjectableValues(InjectableValuesProvider.java:86)
at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$EntityParamInInvoker.getParams(AbstractResourceMethodDispatchProvider.java:153)
at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:203)
at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)
at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:540)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:715)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: com.owlike.genson.JsonBindingException: Could not deserialize to type class java.lang.String
at com.owlike.genson.Genson.deserialize(Genson.java:442)
at com.owlike.genson.ext.jaxrs.GensonJsonConverter.readFrom(GensonJsonConverter.java:125)
... 38 more
Caused by: com.owlike.genson.stream.JsonStreamException: Readen value can not be converted to String
at com.owlike.genson.stream.JsonReader.valueAsString(JsonReader.java:193)
at com.owlike.genson.convert.DefaultConverters$StringConverter.deserialize(DefaultConverters.java:282)
at com.owlike.genson.convert.DefaultConverters$StringConverter.deserialize(DefaultConverters.java:269)
at com.owlike.genson.convert.NullConverter$NullConverterWrapper.deserialize(NullConverter.java:57)
at com.owlike.genson.Genson.deserialize(Genson.java:440)
... 39 more
Indeed, the problem is that Jersey does not know how to map the json to your object.
You can use Genson, when it is in your classpath JSON serialization/deserialization will automatically be enabled with Jersey.