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Apache CXF example source code file (SmallNumberHandler.java)

This example Apache CXF source code file (SmallNumberHandler.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

addnumbers, addnumbers, addnumbersresponse, addnumbersresponse, annotation, jaxbelement, resource, shouldn't, smallnumberhandler, smallnumberhandler, source, string, string, testhandlerbase, util, webserviceexception, xml

The Apache CXF SmallNumberHandler.java source code

/**
 * 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 org.apache.cxf.systest.handlers;

import java.util.Map;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.transform.Source;
import javax.xml.ws.LogicalMessage;
import javax.xml.ws.ProtocolException;
import javax.xml.ws.WebServiceException;
import javax.xml.ws.handler.LogicalHandler;
import javax.xml.ws.handler.LogicalMessageContext;
import javax.xml.ws.handler.MessageContext;

import org.apache.handlers.types.AddNumbers;
import org.apache.handlers.types.AddNumbersResponse;
import org.apache.handlers.types.ObjectFactory;


/**
 * handles addition of small numbers.
 */
public class SmallNumberHandler extends TestHandlerBase implements LogicalHandler<LogicalMessageContext> {
    @Resource(name = "handlerResource")
    String injectedString; 
    
    
    public SmallNumberHandler() {
        this(true); 
    } 
    
    public SmallNumberHandler(boolean serverSide) {
        super(serverSide);
    }
    
    public String getHandlerId() { 
        return "SmallNumberHandler" + getId();
    }  
    
    public final boolean handleMessage(LogicalMessageContext messageContext) {
        //System.out.println("LogicalMessageHandler handleMessage called");

        try {
            boolean outbound = (Boolean)messageContext.get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);

            if (outbound) {
                // get the LogicalMessage from our context
                LogicalMessage msg = messageContext.getMessage();

                // check the payload, if its an AddNumbers request, we'll intervene
                JAXBContext jaxbContext = JAXBContext.newInstance(ObjectFactory.class);
                Object payload = msg.getPayload(jaxbContext);
                if (payload instanceof JAXBElement) {
                    payload = ((JAXBElement)payload).getValue();
                }

                if (payload instanceof AddNumbers) {
                    AddNumbers req = (AddNumbers)payload;

                    // now, if the arguments are small, let's do the calculation here
                    int a = req.getArg0();
                    int b = req.getArg1();

                    if (isSmall(a) && isSmall(b)) {
                        int answer = a + b;

                        //System.out.printf("SmallNumberHandler addNumbers(%d, %d) == %d\n", a, b, answer);
                        // ok, we've done the calculation, so build the
                        // response and set it as the payload of the message
                        
                        AddNumbersResponse resp = new AddNumbersResponse();
                        resp.setReturn(answer);
                        msg.setPayload(new ObjectFactory().createAddNumbersResponse(resp),
                                       jaxbContext);
                        
                        Source src = msg.getPayload();                                             
                        msg.setPayload(src);
                        
                        payload = msg.getPayload(jaxbContext);
                        if (payload instanceof JAXBElement) {
                            payload = ((JAXBElement)payload).getValue();
                        }
                        
                        AddNumbersResponse resp2 = (AddNumbersResponse)payload;
                        if (resp2 == resp) {
                            throw new WebServiceException("Shouldn't be the same object");
                        }

                        // finally, return false, indicating that request
                        // processing stops here and our answer will be
                        // returned to the client
                        return false;
                    }
                }
            }
            return true;
        } catch (JAXBException ex) {
            throw new ProtocolException(ex);
        }

    }

    public final boolean handleFault(LogicalMessageContext messageContext) {
        //System.out.println("LogicalMessageHandler handleFault called");
        //System.out.println(messageContext);

        return true;
    }

    public void close(MessageContext ctx) {
        //System.out.println("LogicalHandler close called");
    }

    public void init(Map config) {
        //System.out.println("LogicalHandler init called");
    }

    public void destroy() {
        //System.out.println("LogicalHandler close called");
    }

    @PostConstruct
    public void doPostConstruct() {
        methodCalled("doPostConstruct");
    }
    
    public String getInjectedString() {
        return injectedString;        
    }
        
    private boolean isSmall(int i) {
        return i > 0 && i <= 10;
    }
}

Other Apache CXF examples (source code examples)

Here is a short list of links related to this Apache CXF SmallNumberHandler.java source code file:

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