newswsmanager.java

来自「这个例子举例说明了一个简单的新闻 Portal。新闻内容是从数据源（这里称为 D」· Java 代码 · 共 97 行

/**
 * NewsWSManager acts as a publisher of a webservice
 * It reuses the model service component, get the relevant
 * messages in a pre-defined data access object and converts this
 * into a required format to publish it a a webservice.
 * This class doesn't contain any struts related references or any
 * servlet related references thus making this as loosely coupled.
 * Exceptions are caught and rethrown as SOAPExceptions.
 *
 *
 */

/**
 * Change History:
 * Author               Date            Version   Details
 * Jerome Josephraj  28 October 2002    1.00.01   Created
 */

package com.ddj.wsstruts.wsmanager.publisher;

import com.ddj.wsstruts.ms.NewsMs;
import com.ddj.wsstruts.valueobject.*;
import com.ddj.wsstruts.constant.SystemConstants;
import java.util.*;
import java.util.Iterator;
import javax.xml.soap.*;

//Log4J statements
import org.apache.log4j.Category;


public class NewsWSManager {
    
    /** Creates new NewsWSManager */
    public NewsWSManager() {
    }
    
    //Log4J
    // define a static category variable so that it references the
    // category instance of the same name as this class.
    static final Category category = Category.getInstance(NewsWSManager.class.getName());    
    
    /*
     * This method is exposed as a webservice.
     * It calls the relevant method in Model service, gets the result
     * in a predefined Data Access Object and populates a String array
     * with the obtained result.
     *
     * @return String[] object
     */
    public String[] getNewsContent() throws SOAPException {
        
        try {
            
            if(category.isDebugEnabled()){
                category.debug(SystemConstants.METHOD_START);
            }
            
            NewsMs newsMs = new NewsMs();
            NewsSearchResult newsSearchCOD = null;
            NewsSearchResult newsSearchResultCOD = new NewsSearchResult();
            Collection newsResult = null;
            String[] newsResultArray = new String[50];
            Iterator i = null;
            int j = 1;
            
            //Create a Collection to get all news content
            newsSearchCOD = new NewsSearchResult();
            newsResult = newsMs.getNews(newsSearchResultCOD);
            i = newsResult.iterator();
            
            //Get newsSearchCod from newsResult collection
            //and get news content from each newsSearchCod
            //and build a string of array
            while(i.hasNext()) {
                newsSearchResultCOD = (NewsSearchResult) i.next();
                newsResultArray[j] = newsSearchResultCOD.getNewsContent();
                j++;
            }
            
            //return the array
            return newsResultArray;
            
        }
        catch(Exception e) {
            
            //Catch any eception and throw it as a SOAPException
            e.printStackTrace();
            SOAPException se = new SOAPException(e.getMessage());
            throw se;
        }
        
        
    }
    
}