Java/Web Services SOA/REST

Axis2 client API has facilities to invoke REST interfaces

 
Sample for Yahoo - Search - REST
=================================
Introduction
============
Axis2 client API has facilities to invoke REST interfaces. The API to be used is almost the same
as the one we use while invoking with REST.
Yahoo provides a REST API to call its search service. This sample demonstrates how to call Yahoo
search service using an Axis2 client.
Pre-Requisites
==============
Apache Ant 1.6.2 or later
Running The Sample
==================
Type "ant" from Axis2_HOME/samples/yahoorestsearch directory.
Help
====
Please contact axis-user list (axis-user@ws.apache.org) if you have any trouble running the sample.

REST based Web Services using the HTTP binding and JAX-WS Provider/Dispatch

 
RESTful Hello World Demo 
========================
The demo shows REST based Web Services using the HTTP binding and 
JAX-WS Provider/Dispatch. The REST server provides the following services: 
A RESTful customer service is provided on URL http://localhost:9000/customerservice/customer. 
Users access this URI to query or update customer info.
A HTTP GET request to URL http://localhost:9000/customerservice/customer returns 
a list of customer hyperlinks. This allows client navigates through the 
application states. The XML document returned:
<Customers>
  <Customer href="http://localhost/customerservice/customer?id=1234">
      <id>1234</id>
  </Customer>
  <Customer href="http://localhost/customerservice/customer?id=1235"> 
      <id>1235</id>
  </Customer>
  <Customer href="http://localhost/customerservice/customer?id=1236"> 
      <id>1236</id>
  </Customer>
</Customers>
A HTTP GET request to URL http://localhost:9000/customerservice/customer?id=1234 
returns a customer instance whose id is 1234. The XML document returned:
<Customer>
  <id>1234</id>
  <name>John</name>
  <phoneNumber>123456</phoneNumber>
</Customer>
A HTTP POST request to URL http://localhost:9000/customerservice/customer 
with the data:
<Customer>
  <id>1234</id>
  <name>John</name>
  <phoneNumber>123456</phoneNumber>
</Customer>
updates customer 1234 with the data provided. 
The client code demonstrates how to send HTTP POST with XML data using 
JAX-WS Dispatch and how to send HTTP GET using URL.openStream(). The 
server code demonstrates how to build a RESTful endpoints through 
JAX-WS Provider interface.

Please review the README in the samples directory before
continuing.

Prerequisites
------------
If your environment already includes cxf-manifest-incubator.jar on the
CLASSPATH, and the JDK and ant bin directories on the PATH
it is not necessary to set the environment as described in
the samples directory README.  If your environment is not
properly configured, or if you are planning on using wsdl2java,
javac, and java to build and run the demos, you must set the
environment.

Building and running the demo using ant
---------------------------------------
From the samples/restful directory, the ant build script
can be used to build and run the demo.
Using either UNIX or Windows:
  ant build
  ant server
  ant client
    
To remove the code generated from the WSDL file and the .class
files, run:
  ant clean

Building the demo using wsdl2java and javac
-------------------------------------------
From the samples/restful directory, first create the target
directory build/classes and then compile the provided client 
and server applications with the commands:
For UNIX:  
  mkdir -p build/classes
  
  export CLASSPATH=$CLASSPATH:$CXF_HOME/lib/cxf-manifest-incubator.jar:./build/classes
  javac -d build/classes src/demo/restful/client/*.java
  javac -d build/classes src/demo/restful/server/*.java
For Windows:
  mkdir build\classes
    Must use back slashes.
  set classpath=%classpath%;%CXF_HOME%\lib\cxf-manifest-incubator.jar;.\build\classes
  javac -d build\classes src\demo\restful\client\*.java
  javac -d build\classes src\demo\restful\server\*.java

Finally, copy resource files into the build/classes directory with the commands:
For UNIX:    
  cp ./src/demo/restful/client/*.xml ./build/classes/demo/restful/client
  cp ./src/demo/restful/server/*.xml ./build/classes/demo/restful/server
For Windows:
  copy src\demo\restful\client\*.xml build\classes\demo\restful\client
  copy src\demo\restful\server\*.xml build\classes\demo\restful\server

Running the demo using java
---------------------------
From the samples/restful directory run the following commands. They 
are entered on a single command line.
For UNIX (must use forward slashes):
    java -Djava.util.logging.config.file=$CXF_HOME/etc/logging.properties
         demo.restful.server.Server &
    java -Djava.util.logging.config.file=$CXF_HOME/etc/logging.properties
         demo.restful.client.Client
The server process starts in the background.  After running the client,
use the kill command to terminate the server process.
For Windows (may use either forward or back slashes):
  start 
    java -Djava.util.logging.config.file=%CXF_HOME%\etc\logging.properties
         demo.restful.server.Server
    java -Djava.util.logging.config.file=%CXF_HOME%\etc\logging.properties
       demo.restful.client.Client
A new command windows opens for the server process.  After running the
client, terminate the server process by issuing Ctrl-C in its command window.
To remove the code generated from the WSDL file and the .class
files, either delete the build directory and its contents or run:
  ant clean
//////////////////////////////////////////////////////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package demo.restful.client;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.URI;
import java.net.URL;
import java.util.Map;
import java.util.Properties;
import javax.xml.namespace.QName;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import javax.xml.ws.Dispatch;
import javax.xml.ws.Service;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.http.HTTPBinding;
import org.w3c.dom.Document;
import org.apache.cxf.helpers.XMLUtils;
public final class Client {
    private Client() {
    }
    public static void main(String args[]) throws Exception {
        QName serviceName = new QName("http://apache.org/hello_world_xml_http/wrapped",
                                                "cutomerservice");
        QName portName = new QName("http://apache.org/hello_world_xml_http/wrapped",
                                             "RestProviderPort");
        String endpointAddress = "http://localhost:9000/customerservice/customer";
        // Sent HTTP GET request to query all customer info
        URL url = new URL(endpointAddress);
        System.out.println("Invoking server through HTTP GET to query all customer info");
        InputStream in = url.openStream();
        StreamSource source = new StreamSource(in);
        printSource(source);
        // Sent HTTP GET request to query customer info
        url = new URL(endpointAddress + "?id=1234");
        System.out.println("Invoking server through HTTP GET to query customer info");
        in = url.openStream();
        source = new StreamSource(in);
        printSource(source);
        // Sent HTTP POST request to update customer info using JAX-WS Dispatch
        URI endpointURI = new URI(endpointAddress.toString());
        String path = null;
        if (endpointURI != null) {
            path = endpointURI.getPath();
        }
        Service service = Service.create(serviceName);
        service.addPort(portName, HTTPBinding.HTTP_BINDING,  endpointAddress);
        Dispatch<DOMSource> dispatcher = service.createDispatch(portName,
                                                                DOMSource.class, Service.Mode.PAYLOAD);
        Map<String, Object> requestContext = dispatcher.getRequestContext();
        Client client = new Client();
        InputStream is = client.getClass().getResourceAsStream("CustomerJohnReq.xml");
        Document doc = XMLUtils.parse(is);
        DOMSource reqMsg = new DOMSource(doc);
        requestContext.put(MessageContext.HTTP_REQUEST_METHOD, "POST");
        System.out.println("Invoking through HTTP POST to update customer using JAX-WS Dispatch");
        DOMSource result = dispatcher.invoke(reqMsg);
        printSource(result);
        System.out.println("Client Invoking is succeeded!");
        System.exit(0);
    }
    private static void printSource(Source source) {
        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            StreamResult sr = new StreamResult(bos);
            Transformer trans = TransformerFactory.newInstance().newTransformer();
            Properties oprops = new Properties();
            oprops.put(OutputKeys.OMIT_XML_DECLARATION, "yes");
            trans.setOutputProperties(oprops);
            trans.transform(source, sr);
            System.out.println("**** Response ******");
            System.out.println(bos.toString());
            bos.close();
            System.out.println();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
//////////////////////////////////////////////////////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package demo.restful.server;
import java.io.InputStream;
import javax.annotation.Resource;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.ws.Provider;
import javax.xml.ws.Service;
import javax.xml.ws.ServiceMode;
import javax.xml.ws.WebServiceContext;
import javax.xml.ws.WebServiceProvider;
import javax.xml.ws.handler.MessageContext;
import org.w3c.dom.Document;
import org.apache.cxf.message.Message;
@WebServiceProvider()
@ServiceMode(value = Service.Mode.PAYLOAD)
public class RestSourcePayloadProvider implements Provider<DOMSource> {
    @Resource
    protected WebServiceContext wsContext;
    public RestSourcePayloadProvider() {
    }
    public DOMSource invoke(DOMSource request) {
        MessageContext mc = wsContext.getMessageContext();
        String path = (String)mc.get(Message.PATH_INFO);
        String query = (String)mc.get(Message.QUERY_STRING);
        String httpMethod = (String)mc.get(Message.HTTP_REQUEST_METHOD);
        System.out.println("--path--- " + path);
        System.out.println("--query--- " + query);
        System.out.println("--httpMethod--- " + httpMethod);
        if (httpMethod.equalsIgnoreCase("POST")) {
            // TBD: parse query info from DOMSource
            System.out.println("---Invoking updateCustomer---");
            return updateCustomer(request);
        } else if (httpMethod.equalsIgnoreCase("GET")) {
            if (path.equals("/customerservice/customer") && query == null) {
                System.out.println("---Invoking getAllCustomers---");
                return getAllCustomers();
            } else if (path.equals("/customerservice/customer") && query != null) {
                System.out.println("---Invoking getCustomer---");
                return getCustomer(query);
            }
        }
        return null;
    }
    private DOMSource getAllCustomers() {
        return createDOMSource("CustomerAllResp.xml");
    }
    private DOMSource getCustomer(String customerID) {
        return createDOMSource("CustomerJohnResp.xml");
    }
    private DOMSource updateCustomer(DOMSource request) {
        // TBD: returned update customer info
        return createDOMSource("CustomerJohnResp.xml");
    }
    private DOMSource createDOMSource(String fileName) {
        DocumentBuilderFactory factory;
        DocumentBuilder builder;
        Document document = null;
        DOMSource response = null;
        try {
            factory = DocumentBuilderFactory.newInstance();
            //factory.setValidating(true);
            builder = factory.newDocumentBuilder();
            InputStream greetMeResponse = getClass().getResourceAsStream(fileName);
            document = builder.parse(greetMeResponse);
            response = new DOMSource(document);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return response;
    }
}

//////////////////////////////////////////////////////////////////////////
/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package demo.restful.server;
import javax.xml.ws.Endpoint;
import javax.xml.ws.http.HTTPBinding;
public class Server {
    protected Server() throws Exception {
        System.out.println("Starting Server");
        Endpoint e = Endpoint.create(HTTPBinding.HTTP_BINDING, new RestSourcePayloadProvider());
        String address = "http://localhost:9000/customerservice/customer";
        e.publish(address);
    }
    public static void main(String args[]) throws Exception {
        new Server();
        System.out.println("Server ready...");
        Thread.sleep(5 * 60 * 1000);
        System.out.println("Server exiting");
        System.exit(0);
    }
}

This demo shows how to create RESTful services using CXF"s HTTP binding

 
This demo shows how to create RESTful services using CXF"s HTTP binding.
The server in the demo creates 3 different endpoints: a RESTful XML
endpoint, a RESTful JSON endpoint, and a SOAP endpoint.
[RUNNING THE DEMO]
The demo has a class called com.acme.customer.Main which starts up various
endpoints. To start this server run the command:
$ ant server
Once it is running try going to the following URLs:
http://localhost:8080/xml/customers
http://localhost:8080/json/customers
http://localhost:8080/xml/customers/123
http://localhost:8080/json/customers/123
These will serve out XML and JSON representation of the resources.
There is an HTML page that is served by CXF so you can try using the
JSON service via Javascript. Just go to:
http://localhost:8080/test.html
Included are some example JSON and XML files so you can add or update
customers using wget. Try the following commands and look at the results:
wget --post-file add.json http://localhost:8080/json/customers
wget --post-file add.xml http://localhost:8080/xml/customers
wget --post-file update.xml http://localhost:8080/xml/customers/123
And if you are interested in SOAP you can try the SOAP endpoint:
http://localhost:8080/soap?wsdl
[RUNNING THE CLIENT]
The demo also includes a Client class which accesses data using 
HTTP. To run this demo, do:
$ ant client