lockertestclient1.java

书籍源程序《J2EE应用开发（WebLogic+JBuilder）》代码

package cmpsample;

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

public class LockerTestClient1 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 LockerRemoteHome lockerRemoteHome = null;
  private LockerRemote lockerRemote = null;

  //Construct the EJB test client
  public LockerTestClient1() {
    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("LockerRemote");
      //look up jndi name and cast to Home interface
      lockerRemoteHome = (LockerRemoteHome) PortableRemoteObject.narrow(ref, LockerRemoteHome.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 LockerRemote create(Integer id) {
    long startTime = 0;
    if (logging) {
      log("Calling create(" + id + ")");
      startTime = System.currentTimeMillis();
    }
    try {
      lockerRemote = lockerRemoteHome.create(id);
      if (logging) {
        long endTime = System.currentTimeMillis();
        log("Succeeded: create(" + id + ")");
        log("Execution time: " + (endTime - startTime) + " ms.");
      }
    }
    catch(Exception e) {
      if (logging) {
        log("Failed: create(" + id + ")");
      }
      e.printStackTrace();
    }

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

  public LockerRemote findByPrimaryKey(Integer id) {
    long startTime = 0;
    if (logging) {
      log("Calling findByPrimaryKey(" + id + ")");
      startTime = System.currentTimeMillis();
    }
    try {
      lockerRemote = lockerRemoteHome.findByPrimaryKey(id);
      if (logging) {
        long endTime = System.currentTimeMillis();
        log("Succeeded: findByPrimaryKey(" + id + ")");
        log("Execution time: " + (endTime - startTime) + " ms.");
      }
    }
    catch(Exception e) {
      if (logging) {
        log("Failed: findByPrimaryKey(" + id + ")");
      }
      e.printStackTrace();
    }

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

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

  public Integer getId() {
    Integer returnValue = null;

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

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

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

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

  public void setLockername(String lockername) {
    if (lockerRemote == null) {
      System.out.println("Error in setLockername(): " + ERROR_NULL_REMOTE);
      return ;
    }

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

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

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

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

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

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

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

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

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

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

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

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

  public void executeRemoteCallsWithDefaultArguments() {
    if (lockerRemote == null) {
      System.out.println("Error in executeRemoteCallsWithDefaultArguments(): " + ERROR_NULL_REMOTE);
      return ;
    }
    getId();
    setLockername("");
    getLockername();
    getStuInfo();
  }

  //----------------------------------------------------------------------------
  // 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) {
    LockerTestClient1 client = new LockerTestClient1();
    client.findByPrimaryKey(new Integer(2));
    client.getStuInfo();

  }
}