firsttestclient1.java

用java编写的绘制手机图片的程序

package paint;

import javax.naming.*;
import javax.rmi.PortableRemoteObject;

/**
 * Title:        ejbserver
 * Description:  this is first ejb server written by zhengjunfeng
 * Copyright:    Copyright (c) 2002
 * Company:      buaa
 * @author zhengjunfeng
 * @version 1.0
 */

public class firstTestClient1 {
  private static final String ERROR_NULL_REMOTE = "Remote interface reference is null.  It must be created by calling one of the Home interface methods first.";
  private static final int MAX_OUTPUT_LINE_LENGTH = 100;
  private boolean logging = true;
  private firstHome firstHomeObject = null;
  private first firstObject = null;

  /**Construct the EJB test client*/
  public firstTestClient1() {
    long startTime = 0;
    if (logging) {
      log("Initializing bean access.");
      startTime = System.currentTimeMillis();
    }

    try {
      //get naming context
      Context ctx = new InitialContext();

      //look up jndi name
      Object ref = ctx.lookup("first");

      //cast to Home interface
      firstHomeObject = (firstHome) PortableRemoteObject.narrow(ref, firstHome.class);
      if (logging) {
        long endTime = System.currentTimeMillis();
        log("Succeeded initializing bean access.");
        log("Execution time: " + (endTime - startTime) + " ms.");
      }
    }
    catch(Exception e) {
      if (logging) {
        log("Failed initializing bean access.");
      }
      e.printStackTrace();
    }
  }

  //----------------------------------------------------------------------------
  // Methods that use Home interface methods to generate a Remote interface reference
  //----------------------------------------------------------------------------

  public first create() {
    long startTime = 0;
    if (logging) {
      log("Calling create()");
      startTime = System.currentTimeMillis();
    }
    try {
      firstObject = firstHomeObject.create();
      if (logging) {
        long endTime = System.currentTimeMillis();
        log("Succeeded: create()");
        log("Execution time: " + (endTime - startTime) + " ms.");
      }
    }
    catch(Exception e) {
      if (logging) {
        log("Failed: create()");
      }
      e.printStackTrace();
    }

    if (logging) {
      log("Return value from create(): " + firstObject + ".");
    }
    return firstObject;
  }

  //----------------------------------------------------------------------------
  // Methods that use Remote interface methods to access data through the bean
  //----------------------------------------------------------------------------

  public String getfirststring() {
    String returnValue = "";
    if (firstObject == null) {
      System.out.println("Error in getfirststring(): " + ERROR_NULL_REMOTE);
      return returnValue;
    }
    long startTime = 0;
    if (logging) {
      log("Calling getfirststring()");
      startTime = System.currentTimeMillis();
    }

    try {
      returnValue = firstObject.getfirststring();
      if (logging) {
        long endTime = System.currentTimeMillis();
        log("Succeeded: getfirststring()");
        log("Execution time: " + (endTime - startTime) + " ms.");
      }
    }
    catch(Exception e) {
      if (logging) {
        log("Failed: getfirststring()");
      }
      e.printStackTrace();
    }

    if (logging) {
      log("Return value from getfirststring(): " + returnValue + ".");
    }
    return returnValue;
  }

  public void testRemoteCallsWithDefaultArguments() {
    if (firstObject == null) {
      System.out.println("Error in testRemoteCallsWithDefaultArguments(): " + ERROR_NULL_REMOTE);
      return ;
    }
    getfirststring();
  }

  //----------------------------------------------------------------------------
  // Utility Methods
  //----------------------------------------------------------------------------

  private void log(String message) {
    if (message == null) {
      System.out.println("-- null");
      return ;
    }
    if (message.length() > MAX_OUTPUT_LINE_LENGTH) {
      System.out.println("-- " + message.substring(0, MAX_OUTPUT_LINE_LENGTH) + " ...");
    }
    else {
      System.out.println("-- " + message);
    }
  }
  /**Main method*/

  public static void main(String[] args) {
    firstTestClient1 client = new firstTestClient1();
    // Use the client object to call one of the Home interface wrappers
    // above, to create a Remote interface reference to the bean.
    // If the return value is of the Remote interface type, you can use it
    // to access the remote interface methods.  You can also just use the
    // client object to call the Remote interface wrappers.
    client.create();
    System.out.println(client.getfirststring());
  }
}