mycarttestclient2.java

1.DATABASE目录下存放的是网上购书系统的数据库脚本文件以及相应的jdatastore数据库文件。 2.bookstoreejb目录下存放的工程对应于网上购书系统的ejb部分。 3.shop

package bookstoreejb;

import javax.naming.*;
import java.util.Properties;
import javax.rmi.PortableRemoteObject;

public class mycartTestClient2 extends Object {
  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 mycartHome mycartHomeObject = null;
  private mycart mycartObject = null;

  //Construct the EJB test client
  public mycartTestClient2() {
    initialize();
  }

  public void initialize() {
    long startTime = 0;
    if (logging) {
      log("Initializing bean access.");
      startTime = System.currentTimeMillis();
    }

    try {
      //get naming context
      Context context = getInitialContext();

      //look up jndi name
      Object ref = context.lookup("mycart");
      //look up jndi name and cast to Home interface
      mycartHomeObject = (mycartHome) PortableRemoteObject.narrow(ref, mycartHome.class);
      if (logging) {
        long endTime = System.currentTimeMillis();
        log("Succeeded initializing local bean access through Local Home interface.");
        log("Execution time: " + (endTime - startTime) + " ms.");
      }
    }
    catch(Exception e) {
      if (logging) {
        log("Failed initializing bean access.");
      }
      e.printStackTrace();
    }
  }

  private Context getInitialContext() throws Exception {
    String url = "t3://zhaoqiang:7001";
    String user = null;
    String password = null;
    Properties properties = null;
    try {
      properties = new Properties();
      properties.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
      properties.put(Context.PROVIDER_URL, url);
      if (user != null) {
        properties.put(Context.SECURITY_PRINCIPAL, user);
        properties.put(Context.SECURITY_CREDENTIALS, password == null ? "" : password);
      }

      return new InitialContext(properties);
    }
    catch(Exception e) {
      log("Unable to connect to WebLogic server at " + url);
      log("Please make sure that the server is running.");
      throw e;
    }
  }

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

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

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

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

  public void addBook(Book book) {
    if (mycartObject == null) {
      System.out.println("Error in addBook(): " + ERROR_NULL_REMOTE);
      return ;
    }

    long startTime = 0;
    if (logging) {
      log("Calling addBook(" + book + ")");
      startTime = System.currentTimeMillis();
    }

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

  public void deleteBook(Book book) {
    if (mycartObject == null) {
      System.out.println("Error in deleteBook(): " + ERROR_NULL_REMOTE);
      return ;
    }

    long startTime = 0;
    if (logging) {
      log("Calling deleteBook(" + book + ")");
      startTime = System.currentTimeMillis();
    }

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

  public float getTotalPrice() {
    float returnValue = 0f;

    if (mycartObject == null) {
      System.out.println("Error in getTotalPrice(): " + ERROR_NULL_REMOTE);
      return returnValue;
    }

    long startTime = 0;
    if (logging) {
      log("Calling getTotalPrice()");
      startTime = System.currentTimeMillis();
    }

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

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

  public void executeRemoteCallsWithDefaultArguments() {
    if (mycartObject == null) {
      System.out.println("Error in executeRemoteCallsWithDefaultArguments(): " + ERROR_NULL_REMOTE);
      return ;
    }
    addBook(null);
    deleteBook(null);
    getTotalPrice();
  }

  //----------------------------------------------------------------------------
  // 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) {
    mycartTestClient2 client = new mycartTestClient2();
    Book book1 =new Book("b1","z",12);
    client.create("z");
    client.addBook(book1);
    System.out.println(client.getTotalPrice());
    client.deleteBook(book1);
    System.out.println(client.getTotalPrice());
// 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.
  }
}