net.buffalo.service.BuffaloWorker.java Source code

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Here is the source code for net.buffalo.service.BuffaloWorker.java

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/*
 * Copyright 2002-2004 the original author or authors.
 * 
 * Licensed 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.
 * 
 * $Id: BuffaloWorker.java,v 1.10 2006/09/30 12:06:28 mechiland Exp $
 */
package net.buffalo.service;

import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.StringWriter;

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

import net.buffalo.request.AbstractRequestWorker;
import net.buffalo.request.RequestContext;
import net.buffalo.request.RequestWorker;
import net.buffalo.request.ValidationException;
import net.buffalo.service.invoker.BuffaloInvoker;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Buffalo worker, deal with the buffalo call
 * 
 * @author michael
 * @version 1.2
 * @since 1.2alpha2
 */
public class BuffaloWorker extends AbstractRequestWorker implements RequestWorker {

    private static final String OUTPUT_ENCODING = "utf-8";
    private static final Log LOGGER = LogFactory.getLog(BuffaloWorker.class);

    public void processRequest(HttpServletRequest request, HttpServletResponse response) throws IOException {

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("invoking buffalo worker");
        }

        String requestService = getWorkerRelativePath();
        ServiceRepository repository = ServiceRepositoryUtil
                .getServiceRepository(RequestContext.getContext().getServletContext());

        Object service = repository.get(requestService);
        response.setHeader("content-type", "text/xml;charset=" + OUTPUT_ENCODING);
        try {
            ServletInputStream inputStream = request.getInputStream();
            BuffaloInvoker.getInstance().invoke(service, inputStream,
                    new OutputStreamWriter(response.getOutputStream(), OUTPUT_ENCODING));
        } catch (Throwable ex) {
            LOGGER.error("An exception occured when invoking a service: ", ex);
            StringWriter writer = new StringWriter();
            ex.printStackTrace(new PrintWriter(writer));
            StringBuffer faultString = new StringBuffer();
            faultString.append("An exception occured when invoking a service. \n");
            faultString.append(writer.toString());
            throw new ServiceInvocationException(faultString.toString(), ex);
        }
    }

    public void validate() throws ValidationException {
        if (!RequestContext.getContext().getHttpRequest().getMethod().equals("POST")) {
            throw new ValidationException("Buffalo worker support POST only!");
        }
    }

    public void validate(HttpServletRequest request, HttpServletResponse response) throws ValidationException {
        if (!request.getMethod().equals("POST")) {
            throw new ValidationException("Buffalo worker support POST only!");
        }
    }

}