studenttestclient1.java

来自「100多M的J2EE培训内容」· Java 代码 · 共 379 行

package dempcmp;

import com.cwj.entitybeandempcmp.*;
import javax.naming.*;
import java.util.Properties;
import javax.rmi.PortableRemoteObject;
import java.util.Collection;

public class StudentTestClient1 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 StudentRemoteHome studentRemoteHome = null;
  private StudentRemote studentRemote = null;

  //Construct the EJB test client
  public StudentTestClient1() {
    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("StudentRemote");
      //look up jndi name and cast to Home interface
      studentRemoteHome = (StudentRemoteHome) PortableRemoteObject.narrow(ref, StudentRemoteHome.class);
      if (logging) {
        long endTime = System.currentTimeMillis();
        log("Succeeded initializing bean access through 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://wg_office: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 StudentRemote create(String studentID) {
    long startTime = 0;
    if (logging) {
      log("Calling create(" + studentID + ")");
      startTime = System.currentTimeMillis();
    }
    try {
      studentRemote = studentRemoteHome.create(studentID);
      if (logging) {
        long endTime = System.currentTimeMillis();
        log("Succeeded: create(" + studentID + ")");
        log("Execution time: " + (endTime - startTime) + " ms.");
      }
    }
    catch(Exception e) {
      if (logging) {
        log("Failed: create(" + studentID + ")");
      }
      e.printStackTrace();
    }

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

  public StudentRemote create(String studentID, String firstname, String lastname) {
    long startTime = 0;
    if (logging) {
      log("Calling create(" + studentID + ", " + firstname + ", " + lastname + ")");
      startTime = System.currentTimeMillis();
    }
    try {
      studentRemote = studentRemoteHome.create(studentID, firstname, lastname);
      if (logging) {
        long endTime = System.currentTimeMillis();
        log("Succeeded: create(" + studentID + ", " + firstname + ", " + lastname + ")");
        log("Execution time: " + (endTime - startTime) + " ms.");
      }
    }
    catch(Exception e) {
      if (logging) {
        log("Failed: create(" + studentID + ", " + firstname + ", " + lastname + ")");
      }
      e.printStackTrace();
    }

    if (logging) {
      log("Return value from create(" + studentID + ", " + firstname + ", " + lastname + "): " + studentRemote + ".");
    }
    return studentRemote;
  }

  public Collection findLastName(String lastname) {
    Collection returnValue = null;

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

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

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

  public StudentRemote findByPrimaryKey(String studentID) {
    long startTime = 0;
    if (logging) {
      log("Calling findByPrimaryKey(" + studentID + ")");
      startTime = System.currentTimeMillis();
    }
    try {
      studentRemote = studentRemoteHome.findByPrimaryKey(studentID);
      if (logging) {
        long endTime = System.currentTimeMillis();
        log("Succeeded: findByPrimaryKey(" + studentID + ")");
        log("Execution time: " + (endTime - startTime) + " ms.");
      }
    }
    catch(Exception e) {
      if (logging) {
        log("Failed: findByPrimaryKey(" + studentID + ")");
      }
      e.printStackTrace();
    }

    if (logging) {
      log("Return value from findByPrimaryKey(" + studentID + "): " + studentRemote + ".");
    }
    return studentRemote;
  }

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

  public String getStudentID() {
    String returnValue = "";

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

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

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

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

  public void setFirstname(String firstname) {
    if (studentRemote == null) {
      System.out.println("Error in setFirstname(): " + ERROR_NULL_REMOTE);
      return ;
    }

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

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

  public String getFirstname() {
    String returnValue = "";

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

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

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

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

  public void setLastname(String lastname) {
    if (studentRemote == null) {
      System.out.println("Error in setLastname(): " + ERROR_NULL_REMOTE);
      return ;
    }

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

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

  public String getLastname() {
    String returnValue = "";

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

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

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

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

  //----------------------------------------------------------------------------
  // 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) {
    StudentTestClient1 client = new StudentTestClient1();
    // 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.
  }
}