Apache CXF example source code file (OsgiServletController.java)

This example Apache CXF source code file (OsgiServletController.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

classloader, collection, html, http, httpservletresponse, io, ioexception, ioexception, log, osgidestination, osgidestination, osgiservletcontroller, request, service, servlet, servletexception, servletexception, string, string, util

The Apache CXF OsgiServletController.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.transport.http_osgi;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.Principal;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.cxf.Bus;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.helpers.HttpHeaderHelper;
import org.apache.cxf.message.ExchangeImpl;
import org.apache.cxf.message.Message;
import org.apache.cxf.message.MessageImpl;
import org.apache.cxf.resource.ResourceManager;
import org.apache.cxf.security.SecurityContext;
import org.apache.cxf.service.model.EndpointInfo;
import org.apache.cxf.service.model.OperationInfo;
import org.apache.cxf.transport.http.AbstractHTTPDestination;
import org.apache.cxf.transport.http.HTTPSession;
import org.apache.cxf.transport.https.SSLUtils;
import org.apache.cxf.transport.servlet.AbstractServletController;
import org.apache.cxf.transports.http.QueryHandler;
import org.apache.cxf.transports.http.QueryHandlerRegistry;
import org.apache.cxf.wsdl.http.AddressType;

public class OsgiServletController extends AbstractServletController {
    private static final Logger LOG = LogUtils.getL7dLogger(OsgiServlet.class);
      
    private OsgiServlet servlet;
    public OsgiServletController(OsgiServlet servlet) {
        super(servlet.getServletConfig());
        this.servlet = servlet;
    }

    private synchronized void updateDests(HttpServletRequest request) {
        if (disableAddressUpdates) {
            return;
        }
        String base = forcedBaseAddress == null ? getBaseURL(request) : forcedBaseAddress;

               
        Set<String> paths = servlet.getTransport().getDestinationsPaths();
        for (String path : paths) {
            OsgiDestination d2 = servlet.getTransport().getDestinationForPath(path);
            String ad = d2.getEndpointInfo().getAddress();
            if (ad.equals(path)) {
                d2.getEndpointInfo().setAddress(base + path);
                if (d2.getEndpointInfo().getExtensor(AddressType.class) != null) {
                    d2.getEndpointInfo().getExtensor(AddressType.class).setLocation(base + path);
                }
            }
        }
    }

    public void invoke(HttpServletRequest request, HttpServletResponse res) throws ServletException {
        try {
            EndpointInfo ei = new EndpointInfo();
            String address = request.getPathInfo() == null ? "" : request.getPathInfo();

            ei.setAddress(address);
            OsgiDestination d = 
                (OsgiDestination)servlet.getTransport().getDestinationForPath(ei.getAddress());

            if (d == null) {
                if (!isHideServiceList && (request.getRequestURI().endsWith(serviceListRelativePath)
                    || request.getRequestURI().endsWith(serviceListRelativePath + "/"))
                    || StringUtils.isEmpty(request.getPathInfo())
                    || "/".equals(request.getPathInfo())) {
                    updateDests(request);
                    generateServiceList(request, res);
                } else {
                    d = checkRestfulRequest(request);
                    if (d == null || d.getMessageObserver() == null) {
                        LOG.warning("Can't find the the request for "
                                    + request.getRequestURL() + "'s Observer ");
                        generateNotFound(request, res);
                    }  else { // the request should be a restful service request
                        updateDests(request);
                        invokeDestination(request, res, d);
                    }
                }
            } else {
                ei = d.getEndpointInfo();
                Bus bus = d.getBus();
                ClassLoader orig = Thread.currentThread().getContextClassLoader();
                try {
                    ResourceManager manager = bus.getExtension(ResourceManager.class);
                    if (manager != null) {
                        ClassLoader loader = manager.resolveResource("", ClassLoader.class);
                        if (loader != null) {
                            //need to set the context classloader to the loader of the bundle
                            Thread.currentThread().setContextClassLoader(loader);
                        }
                    }
                    
                    if (null != request.getQueryString()
                        && request.getQueryString().length() > 0
                        && bus.getExtension(QueryHandlerRegistry.class) != null) {
    
                        String ctxUri = request.getPathInfo();
                        String baseUri = request.getRequestURL().toString()
                            + "?" + request.getQueryString();
                        // update the EndPoint Address with request url
                        if ("GET".equals(request.getMethod())) {
                            updateDests(request);
                        }
    
                        for (QueryHandler qh : bus.getExtension(QueryHandlerRegistry.class).getHandlers()) {
                            if (qh.isRecognizedQuery(baseUri, ctxUri, ei)) {
    
                                res.setContentType(qh.getResponseContentType(baseUri, ctxUri));
                                OutputStream out = res.getOutputStream();
                                try {
                                    qh.writeResponse(baseUri, ctxUri, ei, out);
                                    out.flush();
                                    return;
                                } catch (Exception e) {
                                    LOG.warning(qh.getClass().getName()
                                        + " Exception caught writing response: "
                                        + e.getMessage());
                                    throw new ServletException(e);
                                }
                            }
                        }
                    } else if ("/".equals(address) || address.length() == 0) {
                        updateDests(request);
                    }
                    invokeDestination(request, res, d);
                } finally {
                    Thread.currentThread().setContextClassLoader(orig);
                }
                
            }
        } catch (IOException e) {
            throw new ServletException(e);
        }
    }

    private OsgiDestination checkRestfulRequest(HttpServletRequest request) throws IOException {

        String address = request.getPathInfo() == null ? "" : request.getPathInfo();

        for (String path : servlet.getTransport().getDestinationsPaths()) {
            if (address.startsWith(path)) {
                return servlet.getTransport().getDestinationForPath(path);
            }
        }
        return null;
    }

    protected void generateServiceList(HttpServletRequest request, HttpServletResponse response)
        throws IOException {        
        response.setContentType("text/html; charset=UTF-8");        
        
        response.getWriter().write("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" " 
                + "\"http://www.w3.org/TR/html4/loose.dtd\">");
        response.getWriter().write("<HTML>");
        if (serviceListStyleSheet != null) {
            response.getWriter().write(
                    "<LINK type=\"text/css\" rel=\"stylesheet\" href=\"" 
                    + request.getContextPath() + "/" + serviceListStyleSheet + "\">");
        } else {
            response.getWriter().write(
                                       "<LINK type=\"text/css\" rel=\"stylesheet\" href=\"" 
                                       + request.getRequestURI() + "/?stylesheet=1\">");            
        }
        response.getWriter().write("<meta http-equiv=content-type content=\"text/html; charset=UTF-8\">");
        response.getWriter().write("<title>CXF - Service list");
        response.getWriter().write("</head>");
        
        Collection<OsgiDestination> destinations = servlet.getTransport().getDestinations();
            
        if (destinations.size() > 0) {
            writeSOAPEndpoints(response, destinations);
            writeRESTfulEndpoints(response, destinations);
        } else {
            response.getWriter().write("<span class=\"heading\">No services have been found.");
        }
        
        response.getWriter().write("</body>");
    }

    private void writeSOAPEndpoints(HttpServletResponse response, Collection<OsgiDestination> destinations)
        throws IOException {
        response.getWriter().write("<span class=\"heading\">Available SOAP services:
");
        response.getWriter().write("<table " + (serviceListStyleSheet == null
                ? "cellpadding=\"1\" cellspacing=\"1\" border=\"1\" width=\"100%\"" : "") + ">");
        for (OsgiDestination sd : destinations) {
            if (null != sd.getEndpointInfo().getName() 
                && null != sd.getEndpointInfo().getInterface()) {
                response.getWriter().write("<tr>