requestdatamanager.java

来自「100多M的J2EE培训内容」· Java 代码 · 共 97 行

package bible.ejb.session.example1;



import javax.ejb.*;

import java.util.*;


/**
 * Class RequestDataManager
 *
 *
 * @author
 * @version %I%, %G%
 */
public class RequestDataManager implements SessionBean {

  private SessionContext sessionContext;

  /**
   * Method ejbCreate
   *
   *
   */
  public void ejbCreate() {}

  /**
   * Method ejbRemove
   *
   *
   */
  public void ejbRemove() {}

  /**
   * Method ejbActivate
   *
   *
   */
  public void ejbActivate() {}

  /**
   * Method ejbPassivate
   *
   *
   */
  public void ejbPassivate() {}

  /**
   * Method setSessionContext
   *
   *
   * @param sessionContext
   *
   */
  public void setSessionContext(SessionContext sessionContext) {
    this.sessionContext = sessionContext;
  }

  /**
   * Returns research data about a particular security.
   */
  public String getResearchData(String symbol) {
    return checkResearchDatasource(symbol);
  }

  /**
   * Appends research data about a particular security to this buffer.
   */
  public void appendResearchData(StringBuffer buffer, String symbol) {
    buffer.append(checkResearchDatasource(symbol));
  }

  /**
   * Checks a hard-coded list of securities for a match and returns recommendations.
   * This has been kept simple for the sake of the example, but potentially
   * could be doing a database lookup here.
   */
  private String checkResearchDatasource(String symbol) {

    if (symbol.equals("BEAS")) {
      return "(Zeeware Internal System Lookup) BEAS is rated at a Strong Buy";
    } else if (symbol.equals("YHOO")) {
      return "(Zeeware Internal System Lookup) YHOO is rated at a Buy";
    }

    return "(Zeeware Internal System Lookup Failed) No research available for security: "
           + symbol;
  }
}


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