researchclient.java

来自「100多M的J2EE培训内容」· Java 代码 · 共 67 行

package bible.ejb.session.example1;



import java.rmi.*;

import java.util.*;

import javax.naming.*;


/**
 * ResearchClient periodically asks server for research.
 */
public class ResearchClient extends TimerTask implements Runnable {

  private Random   rand       = new Random();
  private String[] securities = null;

  /**
   * Initializes an InitialContext, gets a reference to a remote EJB on the server,
   * and asks that EJB for research.
   */
  public void run() {

    System.out.println("ResearchClient calling remote EJB.");
    System.out.println(" Time: " + new Date(System.currentTimeMillis()));

    try {
      InitialContext        ctx                 =
        Environment.getInitialContext();
      Object                objref              =
        ctx.lookup("RequestResearch");
      RequestResearchHome   home                =
        (RequestResearchHome) javax.rmi.PortableRemoteObject.narrow(objref,
          RequestResearchHome.class);
      RequestResearchRemote requestResearchBean = home.create();
      StringBuffer          sb                  = new StringBuffer();

      sb.append(requestResearchBean.requestResearch("YHOO") + "\n");
      sb.append(requestResearchBean.requestResearch("BEAS") + "\n");
      sb.append(requestResearchBean.requestResearch("WAG") + "\n");
      System.out.println(sb.toString());
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  /**
   * Declare a new client and schedule it on a timer.
   */
  public static void main(String[] args) {

    Timer          t      = new Timer();
    ResearchClient client = new ResearchClient();

    // Starting in 5 secs, run every 5 seconds.
    t.schedule(client, 5000, 5000);
  }
}


/*--- Formatted in Bible Style on Thu, Sep 6, '01 ---*/


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