Showing posts with label JAX-RS. Show all posts
Showing posts with label JAX-RS. Show all posts

Saturday, May 25, 2024

Java Microprofile GraphQL client using Open Liberty

 HOWTO

 GitHub

 


 

Build client 

[INFO] -------------< io.openliberty.guides:guide-graphql-intro >--------------
[INFO] Building guide-graphql-intro 1.0-SNAPSHOT                          [5/5]
[INFO] --------------------------------[ pom ]---------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for guide-graphql-intro 1.0-SNAPSHOT:
[INFO] 
[INFO] guide-graphql-client-models ........................ SUCCESS [  0.786 s]
[INFO] guide-graphql-client-query ......................... SUCCESS [  1.080 s]
[INFO] guide-graphql-client-graphql ....................... SUCCESS [  0.252 s]
[INFO] guide-graphql-client-system ........................ SUCCESS [  0.189 s]
[INFO] guide-graphql-intro ................................ SUCCESS [  0.001 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS

 

Access client http://localhost:9084/openapi/ui/


 

Run query 


 

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Java Microprofile GraphQL server using Open Liberty

 HOWTO

 

GitHub

 


 

Build models 

$ mvn -pl models install
[INFO] Scanning for projects...
[INFO] 
[INFO] ------< io.openliberty.guides:guide-microprofile-graphql-models >-------
[INFO] Building guide-microprofile-graphql-models 1.0-SNAPSHOT

[INFO] Installing /git/guide-microprofile-graphql/finish/models/target/guide-microprofile-graphql-models-1.0-SNAPSHOT.jar to /home/dave/.m2/repository/io/openliberty/guides/guide-microprofile-graphql-models/1.0-SNAPSHOT/guide-microprofile-graphql-models-1.0-SNAPSHOT.jar
[INFO] Installing /git/guide-microprofile-graphql/finish/models/pom.xml to /home/dave/.m2/repository/io/openliberty/guides/guide-microprofile-graphql-models/1.0-SNAPSHOT/guide-microprofile-graphql-models-1.0-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS

 

Package WAR


$ mvn package


[INFO] Reactor Summary for guide-graphql-intro 1.0-SNAPSHOT:
[INFO] 
[INFO] guide-microprofile-graphql-models .................. SUCCESS [  0.794 s]
[INFO] guide-microprofile-graphql-system .................. SUCCESS [ 10.233 s]
[INFO] guide-microprofile-graphql-graphql ................. SUCCESS [  0.254 s]
[INFO] guide-graphql-intro ................................ SUCCESS [  0.001 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS

 

Enable GraphQL UI  in server.xml

<server description="GraphQL service">
    <featureManager>
        <feature>restfulWS-3.1</feature>
        <feature>jsonb-3.0</feature>
        <feature>jsonp-2.1</feature>
        <feature>cdi-4.0</feature>
        <feature>mpConfig-3.1</feature>
        <feature>mpRestClient-3.0</feature>
        <feature>mpGraphQL-2.0</feature>
    </featureManager>

    <variable name="http.port" defaultValue="9082"/>
    <variable name="https.port" defaultValue="9445"/>

    <variable name="io.openliberty.enableGraphQLUI" value="true" />

    <webApplication location="guide-microprofile-graphql-graphql.war" contextRoot="/" />
    <httpEndpoint host="*" httpPort="${http.port}" 
        httpsPort="${https.port}" id="defaultHttpEndpoint"/>
</server>

 

GraphQL WAR

$ jar tvf ./graphql/target/guide-microprofile-graphql-graphql.war
     0 Sat May 25 07:38:34 CEST 2024 META-INF/
    81 Sat May 25 07:38:34 CEST 2024 META-INF/MANIFEST.MF
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/guides/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/guides/graphql/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/guides/graphql/client/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/lib/
   433 Sat May 25 07:27:24 CEST 2024 WEB-INF/web.xml
  6366 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/guides/graphql/GraphQLService.class
  1415 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/guides/graphql/client/SystemClient.class
   568 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/guides/graphql/client/UnknownUriException.class
  2268 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/guides/graphql/client/UnknownUriExceptionMapper.class
  6693 Sat May 25 07:37:56 CEST 2024 WEB-INF/lib/guide-microprofile-graphql-models-1.0-SNAPSHOT.jar
 15086 Sat May 25 07:27:24 CEST 2024 favicon.ico
  3150 Sat May 25 07:27:24 CEST 2024 index.html
  4503 Sat May 25 07:27:24 CEST 2024 META-INF/maven/io.openliberty.guides/guide-microprofile-graphql-graphql/pom.xml
    97 Sat May 25 07:38:34 CEST 2024 META-INF/maven/io.openliberty.guides/guide-microprofile-graphql-graphql/pom.properties

 

SystemWAR 

dave@fedora:/git/guide-microprofile-graphql/finish$ jar tvf ./system/target/guide-microprofile-graphql-system.war
     0 Sat May 25 07:38:34 CEST 2024 META-INF/
    81 Sat May 25 07:38:34 CEST 2024 META-INF/MANIFEST.MF
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/guides/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/classes/io/openliberty/guides/system/
     0 Sat May 25 07:38:34 CEST 2024 WEB-INF/lib/
   432 Sat May 25 07:27:24 CEST 2024 WEB-INF/web.xml
  1942 Sat May 25 07:38:30 CEST 2024 WEB-INF/classes/io/openliberty/guides/system/SystemPropertiesResource.class
   444 Sat May 25 07:38:30 CEST 2024 WEB-INF/classes/io/openliberty/guides/system/SystemApplication.class
  2398 Sat May 25 07:38:30 CEST 2024 WEB-INF/classes/io/openliberty/guides/system/SystemMetricsResource.class
  6693 Sat May 25 07:37:56 CEST 2024 WEB-INF/lib/guide-microprofile-graphql-models-1.0-SNAPSHOT.jar
  2461 Sat May 25 07:27:24 CEST 2024 index.html
  4007 Sat May 25 07:27:24 CEST 2024 META-INF/maven/io.openliberty.guides/guide-microprofile-graphql-system/pom.xml
    96 Sat May 25 07:38:34 CEST 2024 META-INF/maven/io.openliberty.guides/guide-microprofile-graphql-system/pom.properties

 

Build Docker images 

dave@fedora:/git/guide-microprofile-graphql/finish$ docker images
REPOSITORY                    TAG                   IMAGE ID       CREATED          SIZE
graphql                       1.0-SNAPSHOT          727f633aa833   19 seconds ago   753MB
system                        1.0-java17-SNAPSHOT   6812f8c9c7c0   45 seconds ago   765MB
system                        1.0-java11-SNAPSHOT   915f228505ad   2 minutes ago    747MB

 Start containers 

$ ./scripts/startContainers.sh
fec411c8ccc1e46a593b48399907c93284a2b4b2db82b027d876fd53b1bbf10d
53de0a3383d827a43f6bafe185143f92f885a8a99d36e9c60bb167730399b44e
d175e2f72bfd024c4179659893e92dd566b1120948de122fd7d714d668e403cc
1b7b58a43e02e84c750137e416e55b800b36acac4d6f0c481ccde5b184ef6d8f
dave@fedora:/git/guide-microprofile-graphql/finish$ docker ps 
CONTAINER ID   IMAGE                        COMMAND                  CREATED         STATUS         PORTS                                                           NAMES
d175e2f72bfd   graphql:1.0-SNAPSHOT         "/opt/ol/helpers/run…"   7 seconds ago   Up 6 seconds   9080/tcp, 9443/tcp, 0.0.0.0:9082->9082/tcp, :::9082->9082/tcp   graphql
53de0a3383d8   system:1.0-java17-SNAPSHOT   "/opt/ol/helpers/run…"   7 seconds ago   Up 6 seconds   9080/tcp, 9443/tcp                                              system-java17
1b7b58a43e02   system:1.0-java11-SNAPSHOT   "/opt/ol/helpers/run…"   7 seconds ago   Up 6 seconds   9080/tcp, 9443/tcp                                              system-java11

Call GraphQL endpoint http://localhost:9082/graphql/schema.graphql

"Mutation root"
type Mutation {
  "Changes the note set for the system"
  editNote(hostname: String, note: String): Boolean!
}

"Query root"
type Query {
  "Gets information about the system"
  system(hostname: String): system!
  "Gets system load data from the systems"
  systemLoad(hostnames: [String]): [systemLoad]
}

"Information about a Java installation"
type java {
  vendorName: String
  version: String!
}

"System usage data"
type loadData {
  heapUsed: BigInteger!
  loadAverage: Float!
  nonHeapUsed: BigInteger!
}

"Information about a single system"
type system {
  hostname: String!
  java: java!
  note: String
  osArch: String
  osName: String
  osVersion: String
  systemMetrics: systemMetrics!
  username: String!
}

"Information of system usage"
type systemLoad {
  hostname: String!
  loadData: loadData
}

"System metrics"
type systemMetrics {
  heapSize: BigInteger!
  nonHeapSize: BigInteger!
  processors: Int!
}

Access GraphiQL at the http://localhost:9082/graphql-ui 

 

Query structure

# An example GraphQL query might look like:
#
#     {
#       field(arg: "value") {
#         subField
#       }
#     }

 

Query

query {
  system(hostname: "system-java11") {
    hostname
    username
    osArch
    osName
    osVersion
    systemMetrics {
      processors
      heapSize
      nonHeapSize
    }
    java {
      vendorName
      version
    }
  }
}


Response

{
  "data": {
    "system": {
      "hostname": "system-java11",
      "username": "default",
      "osArch": "amd64",
      "osName": "Linux",
      "osVersion": "6.8.10-200.fc39.x86_64",
      "systemMetrics": {
        "processors": 12,
        "heapSize": 4110352384,
        "nonHeapSize": -1
      },
      "java": {
        "vendorName": "IBM Corporation",
        "version": "11.0.22"
      }
    }
  }
}


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Monday, October 14, 2019

JAX-RS read JSON POST body parameters

 Set a Response Body in JAX-RS

https://www.baeldung.com/jax-rs-response

 

 Read JSON directly


    @POST
    @Path("listwrapper/")
    @Consumes({MediaType.APPLICATION_JSON})
    @Produces({MediaType.APPLICATION_JSON})
    public String getListViaWrapperHTTPRequest(List<String> list) {

        System.out.println("getListViaWrapperHTTPRequest");

        for(String param: list){
            System.out.println("param=" + param);
        }
        return "SOME_RESPONSE";
    }




Read HTTP request body


    @POST
    @Path("listraw/")
    @Consumes({MediaType.APPLICATION_JSON})
    @Produces({MediaType.APPLICATION_JSON})
    public String getListViaRawHTTPRequest(@Context HttpServletRequest request, byte[] bodyBytes) {

        System.out.println("getListViaRawHTTPRequest");

        System.out.println("Content-Type: " + request.getContentType().toString());

        String body = new String(bodyBytes);

        System.out.println("body=" + body);

       return "SOME_RESPONSE";

    }
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Saturday, October 5, 2019

Creating a RESTful web service using Java Microprofile

 Creating a RESTful web service using Java Microprofile - OpenLiberty guide

https://openliberty.io/guides/rest-intro.html?_ga=2.32933814.922244966.1570259159-606366657.1570259159


Install latest version of Maven  on Centos 7.6 ( sample failed with 3.0.5 default version)
https://www.tecmint.com/install-apache-maven-on-centos-7/

No implementation for org.codehaus.plexus.languages.java.jpms.LocationManager was bound.
  while locating org.apache.maven.plugin.surefire.SurefirePlugin

On Fedora 30 I get following error in Maven
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal net.wasdev.wlp.maven.plugins:liberty-maven-plugin:2.7:install-server (install-server) on project microprofile: Unable to resolve artifact: io.openliberty:openliberty-runtime:19.0.0.9: Could not transfer artifact io.openliberty:openliberty-runtime:zip:19.0.0.9 from/to central (https://repo.maven.apache.org/maven2): User-specified log class 'org.codehaus.mojo.pluginsupport.logging.DelegatingLog' cannot be found or is not useable. -> [Help 1]
Installing latest version of Maven removed error


Clone the tutorial  sample repo
https://github.com/eugenp/tutorials

Go to Microprofile sample
https://github.com/eugenp/tutorials/tree/master/microprofile

Follow the tutorial article
https://www.baeldung.com/eclipse-microprofile

Change versions to latest in pom.xml - check versions at https://mvnrepository.com/artifact/io.openliberty/openliberty-runtime/

tail pom.xml 
    <properties>
        <app.name>library</app.name>
        <package.file>${project.build.directory}/${app.name}-service.jar</package.file>
        <packaging.type>runnable</packaging.type>
        <microprofile.version>1.2</microprofile.version>
        <liberty-maven-plugin.version>2.7</liberty-maven-plugin.version>
        <openliberty-runtime.version>19.0.0.9</openliberty-runtime.version>
    </properties>

JsonObject - Java EE 7
https://docs.oracle.com/javaee/7/api/javax/json/JsonObject.html

Reader/Writer Java EE7 sample https://github.com/javaee-samples/javaee7-samples/tree/master/jaxrs/readerwriter-json

Compile and start the service
mvn package
java -jar target/library-service.jar


microprofile]$ java -jar target/library-service.jar
Extracting files to /home/centos/wlpExtract/library-service_1453971251685/wlp
Successfully extracted all product files.
Launching defaultServer (Open Liberty 19.0.0.9/wlp-1.0.32.cl190920190905-0148) on OpenJDK 64-Bit Server VM, version 1.8.0_222-b10 (en_US)
[AUDIT   ] CWWKE0001I: The server defaultServer has been launched.
[AUDIT   ] CWWKZ0058I: Monitoring dropins for applications.
[AUDIT   ] CWWKT0016I: Web application available (default_host): http://localhost:9080/
[AUDIT   ] CWWKZ0001I: Application microprofile-1.0-SNAPSHOT started in 1.746 seconds.
[AUDIT   ] CWWKF0012I: The server installed the following features: [cdi-1.2, jaxrs-2.0, jaxrsClient-2.0, jndi-1.0, json-1.0, jsonp-1.0, servlet-3.1].
[AUDIT   ] CWWKF0011I: The defaultServer server is ready to run a smarter planet. The defaultServer server started in 5.136 seconds.


Test the service

 

curl http://localhost:9080/library/books
[{"id":"0001-201910","isbn":"1","name":"Building Microservice With Eclipse MicroProfile","author":"baeldung","pages":"420"}]
On Weblogic I got following error 
Oct 07, 2019 10:16:16 AM org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor aroundWriteTo
SEVERE: MessageBodyWriter not found for media type=application/json, type=class java.util.ArrayList, genericType=class java.util.ArrayList.
<Oct 7, 2019, 10:16:16,652 AM CEST> <Error> <org.glassfish.jersey.message.internal.WriterInterceptorExecutor> <BEA-000000> <MessageBodyWriter not found for media type=application/json, type=class java.util.ArrayList, genericType=class java.util.ArrayList.>
Using this hint from Adam Bien solved the issue http://www.adam-bien.com/roller/abien/entry/jax_rs_returning_a_list 
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response getAllBooks() {

        List<Book> books = bookManager.getAll();
        GenericEntity<List<Book>> list = new GenericEntity<List<Book>>(books) {
        };
        return Response.ok(list).build();
        
    }
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JAX-RS JAXB JSON - convert POJO to JSON

 Guide to JAXB

https://www.baeldung.com/jaxb

Sample code
 https://github.com/eugenp/tutorials/tree/master/jaxb

Microservice sample
https://www.baeldung.com/eclipse-microprofile

In previous versions before Java EE 7 to  serialize a POJO into JSON using JAXB you  had use a custom JAXB runtime like e.g. EclipseLink MOXy:
http://www.adam-bien.com/roller/abien/entry/jaxb_json_pojo_serialization_example

 Weblogic
http://blog.bdoughan.com/2013/07/oracle-weblogic-1212-now-with.html

 https://stackoverflow.com/questions/46813309/weblogic-12-2-1-3-from-moxy-to-jackson

Java EE 6
 https://docs.oracle.com/javaee/6/tutorial/doc/gkknj.html

Java EE 7
https://docs.oracle.com/javaee/7/tutorial/jaxrs-advanced007.htm

 


Using JSON with JAX-RS and JAXB

JAX-RS can automatically read and write XML using JAXB, but it can also work with JSON data. JSON is a simple text-based format for data exchange derived from JavaScript.

For this data 
 
 1
  Mattress
  Queen size mattress
  500
 
The equivalent JSON representation is:
{
    "id":"1",
    "name":"Mattress",
    "description":"Queen size mattress",
    "price":500
}
 
You can add the format application/json to the @Produces annotation in resource methods to produce responses with JSON data:

@GET
@Path("/get")
@Produces({"application/xml","application/json"})
public Product getProduct() { ... }
 
In this example the default response is XML, but the response is a JSON object if the client makes a GET request that includes this header:

Accept: application/json
 
The resource methods can also accept JSON data for JAXB annotated classes:
 
@POST
@Path("/create")
@Consumes({"application/xml","application/json"})
public Response createProduct(Product prod) { ... }
 
The client should include the following header when submitting JSON data with a POST request:

Content-Type: application/json
 
 

Weblogic 12.2.1.2 sample



https://docs.oracle.com/middleware/1221/wls/RESTF/develop-restful-service.htm#RESTF217
 
import javax.ws.rs.GET;
import javax.ws.rs.Produces;
import javax.ws.rs.Path;
...
public class BookmarkResource {
...
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public JSONObject getBookmark() {
        return asJson();
    }
...
    public JSONObject asJson() {
        try {
            return new JSONObject()
                    .put("userid", bookmarkEntity.getBookmarkEntityPK().getUserid())
                    .put("sdesc", bookmarkEntity.getSdesc())
                    .put("ldesc", bookmarkEntity.getLdesc())
                    .put("uri", bookmarkEntity.getUri());
        } catch (JSONException je){
            return null;
        }
    }
} 
 

Convert Java POJO to JSON- using Response

https://www.baeldung.com/jax-rs-response

@GET
@Path("/pojo")
public Response getPojoResponse() {
    Person person = new Person("Abhinayak", "Nepal");
    return Response
      .status(Response.Status.OK)
      .entity(person)
      .build();
}

https://stackoverflow.com/questions/28079195/how-to-get-json-representation-of-java-objects-in-jax-rs-layer-in-java-ee-7 

@GET
@Path("/books")
@Produces(MediaType.APPLICATION_JSON)
public Response getBooks()  {
    List<Book> listOfBooks = getMiscService().getbooks();
    BooksWrapper result = new BooksWrapper(listOfBooks);
    return Response.status(Response.Status.OK).entity(result).build();
}
 

Convert POJO to JSON using MessageWriter

  

Use MessageBodyWriter - see here https://www.baeldung.com/eclipse-microprofile
 
https://github.com/eugenp/tutorials/blob/master/microprofile/src/main/java/com/baeldung/microprofile/providers/BookMessageBodyWriter.java


@Provider
@Produces(MediaType.APPLICATION_JSON)
public class BookMessageBodyWriter
  implements MessageBodyWriter {
 
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Sunday, September 29, 2019

Java EE 7 : JAX-RS 2.0 REST API sample on Weblogic 12.2.2.

Java EE 7 and JAX-RS 2.0

by Adam Bien
https://www.oracle.com/technetwork/articles/java/jaxrs20-1929352.html

Java EE7 samples
https://github.com/javaee-samples/javaee7-samples/tree/master/jaxrs


Building RESTful Web Services with JAX-RS

 https://docs.oracle.com/javaee/7/tutorial/jaxrs.htm

 JAX-RS API implementations - Jersey and RESTEasy

  https://www.baeldung.com/jax-rs-spec-and-implementations

Weblogic 12.2.1.2

In 12.2.x, WebLogic Server supports Jersey 2.21.x (JAX-RS 2.0 RI) by default in this release.

WebLogic 12.1.2 contains EclipseLink 2.4.2, this means that for the first time EclipseLink MOXy JSON-binding is available in WebLogic out of the box. See https://dzone.com/articles/oracle-weblogic-1212-now

https://wiki.eclipse.org/EclipseLink/Examples/MOXy 

Oracle Fusion Middleware Developing and Securing RESTful Web Services for Oracle WebLogic Server
https://docs.oracle.com/middleware/12212/wls/RESTF/intro-restful-service.htm#RESTF105


Weblogic Java EE7 samples
https://docs.oracle.com/middleware/12212/wls/INTRO/examples.htm#INTRO299

Jersey  JAX-RS implementation - 2.21 supported on Weblogic 12.2.1.2

https://eclipse-ee4j.github.io/jersey/

Sample Bookmark code
https://github.com/jersey/jersey/tree/master/examples/bookmark

JBoss RESTEasy - alternative JAX-RS implementation

RESTFul Web Services for Java - RESTEasy

https://docs.jboss.org/resteasy/docs/4.3.1.Final/userguide/html_single/index.html

RESTEasy examples

https://github.com/resteasy/resteasy-examples/tree/3.6.0.Final

Convert Java object to JSON
https://stackoverflow.com/questions/28079195/how-to-get-json-representation-of-java-objects-in-jax-rs-layer-in-java-ee-7

Sample code

https://github.com/dveselka/weblogic/tree/master/dave-basic-project/rs-api



MyApplication class

package com.dave.service;

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
import java.util.Set;

@ApplicationPath("resources")
public class MyApplication  extends Application {

    @Override
    public Set<Class<?>> getClasses() {
        Set<Class<?>> resources = new java.util.HashSet<>();
        resources.add(MyResource.class);
        return resources;
    }

}

MyResource class


 package com.dave.service; 

import javax.ejb.EJB;
import javax.enterprise.context.RequestScoped;
import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;

@Path("persons")
@RequestScoped
public class MyResource {

    @EJB
    PersonSessionBean bean;

    @GET
    @Produces({"application/json"})
    public Person[] persons() {
        return bean.getPersons().toArray(new Person[0]);
    }

    @GET
    @Produces({"application/json"})
    @Path("{id}")
    public Person getPerson(@PathParam("id") int id) {
        if (id < bean.getPersons().size())
            return bean.getPersons().get(id);
        else
            return null;
    }
}



Call the endpoint

http://myHostName/contextPath/servletURI/resourceURI


localhost:7001/rs-api/resources/persons

JSON returned

[{"age":50,"name":"dave"},{"age":30,"name":"abc"}]


Call the endpoint with id

localhost:7001/rs-api/resources/persons/1

Call Python REST client

import requests
import os
import sys
import json
from pprint import pprint


def getPerson(hostName):

    url = 'http://' + hostName + ':7001/rs-api/resources/persons'

    print ('--------------------------------------------------------------------')

    os.environ['no_proxy'] = hostName
    os.environ['PYTHONWARNINGS'] = "ignore:Unverified HTTPS request"


    headers = {
        'Accept': 'application/json',
        'X-Requested-By': 'MyClient',
    }

    response = requests.get(url, headers=headers)

    data = response.json()

    print data


if len(sys.argv)>1:
    WEBLOGIC_HOST=sys.argv[1]
else:
    WEBLOGIC_HOST=os.environ.get('HOSTNAME')

print ("WEBLOGIC_HOST=" + WEBLOGIC_HOST)

getPerson(WEBLOGIC_HOST)


Call the Python client from CLI

 python src/test/python/rs-api-client.py
WEBLOGIC_HOST=localhost
--------------------------------------------------------------------
[{u'age': 50, u'name': u'dave'}, {u'age': 30, u'name': u'abc'}]


Debugging - wrong annotation on model classes

https://www.jetbrains.com/help/idea/run-debug-configuration-weblogic-server.html 

####<Oct 2, 2019, 10:49:04,541 AM CEST> <Error> <org.glassfish.jersey.server.wadl.internal.generators.WadlGeneratorJAXBGrammarGenerator> <rdfadm> <AdminServer> <[ACTIVE] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <90846077-0af6-47ac-bace-a3fc2236a3d2-00000016> <1570006144541> <[severity-value: 8] [rid: 0] [partition-id: 0] [partition-name: DOMAIN] > <BEA-000000> <Failed to generate the schema for the JAX-B elements
javax.xml.bind.JAXBException: 
Exception Description: The class com.clearstream.service.Book requires a zero argument constructor or a specified factory method.  Note that non-static inner classes do not have zero argument constructors and are not supported.
 - with linked exception:
[Exception [EclipseLink-50001] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.JAXBException
Exception Description: The class com.dave.service.Book requires a zero argument constructor or a specified factory method.  Note that non-static inner classes do not have zero argument constructors and are not supported.]
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
    at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:471)
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:425)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:383)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:336)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:223)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:286)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:260)
    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:137)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:350)
    at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:25)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
    at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:32)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3683)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3649)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:326)
    at weblogic.security.service.SecurityManager.runAsForUserCode(SecurityManager.java:197)
    at weblogic.servlet.provider.WlsSecurityProvider.runAsForUserCode(WlsSecurityProvider.java:203)
    at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:71)
    at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2433)
    at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2281)
    at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2259)
    at weblogic.servlet.internal.ServletRequestImpl.runInternal(ServletRequestImpl.java:1691)
    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1651)
    at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:270)
    at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:348)
    at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:333)
    at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:54)
    at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41)
    at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:640)
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:406)
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:346)
Caused By: Exception [EclipseLink-50001] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.JAXBException
Exception Description: The class com.dave.service.Book requires a zero argument constructor or a specified factory method.  Note that non-static inner classes do not have zero argument constructors and are not supported.
    at org.eclipse.persistence.exceptions.JAXBException.factoryMethodOrConstructorRequired(JAXBException.java:148)
    at org.eclipse.persistence.jaxb.compiler.AnnotationsProcessor.finalizeProperties(AnnotationsProcessor.java:966)
    at org.eclipse.persistence.jaxb.compiler.AnnotationsProcessor.processClassesAndProperties(AnnotationsProcessor.java:304)
    at org.eclipse.persistence.jaxb.compiler.Generator.<init>(Generator.java:158)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
    at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:471)
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:425)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:383)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:336)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:223)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:286)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:260)
    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:137)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:350)
    at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:25)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
    at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:32)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3683)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3649)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:326)
    at weblogic.security.service.SecurityManager.runAsForUserCode(SecurityManager.java:197)
    at weblogic.servlet.provider.WlsSecurityProvider.runAsForUserCode(WlsSecurityProvider.java:203)
    at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:71)
    at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2433)
    at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2281)
    at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2259)
    at weblogic.servlet.internal.ServletRequestImpl.runInternal(ServletRequestImpl.java:1691)
    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1651)
    at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:270)
    at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:348)
    at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:333)
    at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:54)
    at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41)
    at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:640)
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:406)
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:346)
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