defaultinserthandler.java

一套java版本的搜索引擎源码

/**
 * 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.lucene.gdata.servlet.handler;

import java.io.IOException;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.lucene.gdata.data.GDataAccount.AccountRole;
import org.apache.lucene.gdata.server.GDataRequestException;
import org.apache.lucene.gdata.server.GDataResponse;
import org.apache.lucene.gdata.server.ServiceException;
import org.apache.lucene.gdata.server.GDataRequest.GDataRequestType;

import com.google.gdata.data.BaseEntry;

/**
 * Default Handler implementation. This handler processes the incoming
 * {@link org.apache.lucene.gdata.server.GDataRequest} and inserts the requested
 * feed entry into the storage and the search component.
 * <p>
 * The handler sends following response to the client:
 * </p>
 * <ol>
 * <li>if the entry was added - HTTP status code <i>200 OK</i></li>
 * <li>if an error occurs - HTTP status code <i>500 INTERNAL SERVER ERROR</i></li>
 * <li>if the resource could not found - HTTP status code <i>404 NOT FOUND</i></li>
 * </ol>
 * <p>The added entry will be send back to the client if the insert request was successful.</p>
 * 
 * @author Simon Willnauer
 *
 */
public class DefaultInsertHandler extends AbstractGdataRequestHandler {
    private static final Log LOG = LogFactory.getLog(DefaultInsertHandler.class);
    /**
     * @throws ServletException 
     * @see org.apache.lucene.gdata.servlet.handler.GDataRequestHandler#processRequest(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    @Override
	public void processRequest(HttpServletRequest request,
            HttpServletResponse response) throws IOException, ServletException {
        try {
            initializeRequestHandler(request,response,GDataRequestType.INSERT);            
        } catch (GDataRequestException e) {
            sendError();
            return;
        }
        if(!authenticateAccount(this.feedRequest,AccountRole.ENTRYAMINISTRATOR)){
            setError(GDataResponse.UNAUTHORIZED);
            sendError();
            return;
        }
       
        try{        
        BaseEntry entry = this.service.createEntry(this.feedRequest,this.feedResponse);
        setFeedResponseFormat();
        setFeedResponseStatus(GDataResponse.CREATED);        
        this.feedResponse.sendResponse(entry, this.feedRequest.getConfigurator());
        
        }catch (ServiceException e) {
           LOG.error("Could not process GetFeed request - "+e.getMessage(),e);
           setError(e.getErrorCode());
           sendError();
        }finally{
        closeService();
        }
    }

}