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Difference between revisions of "EclipseLink/Examples/DBWS/AdvancedJavase6Containerless"

 
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Latest revision as of 09:11, 7 October 2010


DBWS Services running 'containerless' using the Endpoint API

It is possible to run a Web service using Javase 6's 'containerless' javax.xml.ws.Endpoint API.

Javase 6 ships with the JAX-WS 2.x APIx inside the JDK - versions prior to update 4 have JAX-WS 2.0 APIs, which may cause some issues with later API requirements: to fix this, copy jaxws-api.jar and jaxb-api.jar into the endorsed directory (typically $JAVA_HOME/lib/endorsed or $JDK_HOME/jre/lib/endorsed). Please see this link for more details.

DBWSBuilder javase packager

When invoked from the command-line, the DBWSBuilder offers out-of-the-box support for building and packaging DBWS Services for either the WebLogic server or for running 'containerless' using the javax.xml.ws.Endpoint API

prompt > dbwsbuilder.cmd -builderFile {path_to_builder.xml} -stageDir {path_to_stageDir} -packageAs {packager}
Available packagers:
  -packageAs:[default=archive] wls [warFilename]
  -packageAs:[default=archive] javase [jarFilename]
                               ^^^^^^

Archive layout

The content of the .jar file is arranged differently from how the wls packager builds a .war file:

wls packager
    \---web-inf (root of .war file)
    |   web.xml
    |
    +---classes
    |   |
    |   +---META-INF
    |   |       eclipselink-dbws.xml
    |   |       eclipselink-dbws-or.xml
    |   |       eclipselink-dbws-ox.xml
    |   |       eclipselink-dbws-sessions.xml
    |   |
    |   \---_dbws
    |           DBWSProvider.class            -- auto-generated JAX-WS 2.0 Provider
    |
    \---wsdl
            eclipselink-dbws-schema.xsd
            eclipselink-dbws.wsdl
 
vs.
 
javase packager
    \---meta-inf (root of .jar file)
    |   eclipselink-dbws.xml
    |   eclipselink-dbws-or.xml
    |   eclipselink-dbws-ox.xml
    |   eclipselink-dbws-sessions.xml
    |
    +---wsdl
    |   eclipselink-dbws-schema.xsd
    |   eclipselink-dbws.wsdl
    |
    \---_dbws
        DBWSProvider.class

Generated Web service Provider

The code-generated _dbws.DBWSProvider class is annotated slightly differently for 'containerless' deployment:

package _dbws;
 
//javase imports
import java.lang.reflect.Method;
 
//java eXtension libraries
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.servlet.ServletContext;
import javax.xml.soap.SOAPMessage;
import javax.xml.ws.Provider;
import javax.xml.ws.ServiceMode;
import javax.xml.ws.WebServiceProvider;
import static javax.xml.ws.Service.Mode.MESSAGE;
 
//EclipseLink imports
import org.eclipse.persistence.internal.dbws.ProviderHelper;
 
@WebServiceProvider(
    /* wsdlLocation not present in @WebServiceProvider annotation for 'containerless' deployments */
    serviceName = "testService",
    portName = "testServicePort",
    targetNamespace = "urn:testService"
)
@ServiceMode(MESSAGE)
public class DBWSProvider extends ProviderHelper implements Provider<SOAPMessage> {
    public  DBWSProvider() {
        super();
    }
    @PostConstruct
    public void init() {
        super.init();
    }
    @Override
    public SOAPMessage invoke(SOAPMessage request) {
        return super.invoke(request);
    }
    @Override
    @PreDestroy
    public void destroy() {
        super.destroy();
    }
...
}

Example

For a DBWS service based on a DBWSBuilder table query operation:

<?xml version="1.0" encoding="UTF-8"?>
<dbws-builder xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <properties>
    <property name="projectName">emp</property>
    ...
  </properties>
  <table
    catalogPattern="%"
    tableNamePattern="EMP"
  />
</dbws-builder>

With the .jar on the classpath, an Endpoint can be created programmatically:

//javase imports
...
import static javax.xml.ws.BindingProvider.ENDPOINT_ADDRESS_PROPERTY;
import static javax.xml.ws.soap.SOAPBinding.SOAP11HTTP_BINDING;
...
//domain imports
import _dbws.DBWSProvider;
 
public class ContainerlessTest {
 
    static final String ENDPOINT_ADDRESS = 
        "http://localhost:9999/test";
 
    public static void main(String[] args) {
 
        // build Endpoint
        Endpoint endpoint = Endpoint.create(new DBWSProvider());
        endpoint.publish(ENDPOINT_ADDRESS);
 
        // retrieve info from Provider's annotations
        WebServiceProvider dbwsProvider = DBWSProvider.class.getAnnotation(WebServiceProvider.class);
        String serviceNamspace = dbwsProvider.targetNamespace();
        String serviceName = dbwsProvider.serviceName();
        String portName = dbwsProvider.portName();
 
        // build service
        QName serviceQName = new QName(serviceNamspace, serviceName);
        QName portQName = new QName(serviceNamspace, portName);
        Service testService = Service.create(serviceQName);
        testService.addPort(portQName, SOAP11HTTP_BINDING, ENDPOINT_ADDRESS);
 
        // build dispatch to send SOAP msg
        Dispatch<SOAPMessage> dispatch = testService.createDispatch(portQName, SOAPMessage.class,
            Service.Mode.MESSAGE);
        BindingProvider bp = (BindingProvider)dispatch;
        Map<String, Object> rc = bp.getRequestContext();
        rc.put(ENDPOINT_ADDRESS_PROPERTY,ENDPOINT_ADDRESS);
 
        MessageFactory factory = MessageFactory.newInstance();
        SOAPMessage request = factory.createMessage();
        SOAPPart part = request.getSOAPPart();
        DOMSource domSource = new DOMSource(db.parse(
            new InputSource(new StringReader(FIND_BY_PK_REQUEST))));
        part.setContent(domSource);
        SOAPMessage response = null;
        try {
            response = dispatch.invoke(request);
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        if (response != null) {
            Source src = response.getSOAPPart().getContent();
            TransformerFactory tf = TransformerFactory.newInstance();
            Transformer transformer = tf.newTransformer();
            DOMResult result = new DOMResult();
            transformer.transform(src, result);
            Document resultDoc = (Document)result.getNode();
            System.out.print(documentToString(resultDoc));
        }
 
        // tearDown service
        endpoint.stop();
    }
 
    static final String FIND_BY_PK_REQUEST =
        "<env:Envelope xmlns:env=\"http://schemas.xmlsoap.org/soap/envelope/\">" +
          "<env:Body>" +
            "<ns1:findByPrimaryKey_empType xmlns:ns1=\"urn:testService\" xmlns=\"urn:test\">" +
               "<ns1:id>7369</ns1:id>" +
            "</ns1:findByPrimaryKey_empType>" +
          "</env:Body>" +
         "</env:Envelope>";
 
    static String documentToString(Document doc) {
        DOMSource domSource = new DOMSource(doc);
        StringWriter stringWriter = new StringWriter();
        StreamResult result = new StreamResult(stringWriter);
        try {
            Transformer transformer = TransformerFactory.newInstance().newTransformer();
            transformer.setOutputProperty("indent", "yes");
            transformer.transform(domSource, result);
            return stringWriter.toString();
        } catch (Exception e) {
            // e.printStackTrace();
            return "<empty/>";
        }
    }   
}

Result:

<?xml version="1.0">
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
  <SOAP-ENV:Header />
  <SOAP-ENV:Body>
    <srvc:findByPrimaryKey_empTypeResponse xmlns="urn:test" xmlns:srvc="urn:testService">
      <srvc:result>
        <empType>
          <empno>7369</empno>
          <ename>SMITH</ename>
          <job>CLERK</job>
          <mgr>7902</mgr>
          <hiredate>1980-12-17T00:00:00.0-05:00</hiredate>
          <sal>800</sal>
          <deptno>20</deptno>
        </empType>
      </srvc:result>
    </srvc:findByPrimaryKey_empTypeResponse>
  </SOAP-ENV:Body>
</SOAP-ENV:Envelope>