quoteclient.java

来自「100多M的J2EE培训内容」· Java 代码 · 共 72 行

package bible.rmi.example4;

import weblogic.rmi.*;
import java.util.*;
import javax.naming.*;

/**
 * Periodically ask the PriceServer for prices of all securities.
 */
public class QuoteClient extends TimerTask implements Runnable {

  /**
   * Get a reference to the PriceServer, get a list of securites, and display prices.
   */
  public void run() {

    System.out.println("QuoteClient, Getting quotes.");
    System.out.println("Quote time: " + new Date(System.currentTimeMillis()));

    try {

      // Get the remote stub for the Price server via JNDI.
      InitialContext ctx    = Environment.getInitialContext();
      PriceServer    server =
        (PriceServer) ctx.lookup(PriceServer.PRICESERVERNAME);

      // Remote call
      String securities [] = server.getSecurities();
      if (securities != null) {
        for (int i = 0; i < securities.length; i++) {

          // Remote call
          System.out.println("Security: " + securities [i] + " Price: "
                             + server.getPrice(securities [i]));
        }
      } else {
        System.out
          .println("No securities registered with the server at this time.");
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  /**
   * Create a QuoteClient and schedule it for periodic running.
   * @param args
   */
  public static void main(String[] args) {

    Timer       t      = new Timer();
    QuoteClient client = new QuoteClient();
    System.out.println("QuoteClient started.");

    try {
      InitialContext ctx  = Environment.getInitialContext();
      ExecutionAlert tc   = (ExecutionAlert) ctx.lookup("TradingClient");
      Execution      exec = new Execution();
      exec.setNumber(-1);
      exec.setPrice(-1);
      exec.setShares(-1);
      exec.setSymbol("Hi there!");
      tc.notifyOfExecution(exec);
    } catch (Exception e) {
      e.printStackTrace();
    }

    // Starting in 10 secs, check every 20 secs.
    t.schedule(client, 10000, 20000);
  }
}