Kuldip Shetty

By adding public getter and setter method for instance variables in Book you should be able to print the values of the private variables of Book in TravelGuide

Book
       private String title;        public String getTitle() {           return title;        }        public void setTitle(String title) {           this.title = title;        }


TravelGuide
  public void printDetail(){      System.out.println("ISBN: " + getIsbn());      System.out.println("Author: " + getAuthor());      System.out.println("Title: " + getTitle());      System.out.println("Country: " + this.country);   }

Below are three changes:
1. Book - Change private to protected as private variables are not accessible to inherited classes
2. Set the values in the Book constructor
3. TravelGuide - Invoke super() in constructor of TravelGuide to invoke base class Book constructor with parameters

Book
public class Book {   protected String isbn;   protected String author;   protected String title;   public Book(String isbn, String author, String title){ this.isbn = isbn; this.author = author; this.title = title;   }       public void printInfo() {      System.out.println("ISBN: " + this.isbn);      System.out.println("Author: " + this.author);      System.out.println("Title: " + this.title);   } }

TravelGuide

public class TravelGuide extends Book {   private String country;       public TravelGuide(String isbn, String author, String title, String country){      super(isbn,author,title);      this.country = country;   }       public void printDetail(){      System.out.println("ISBN: " + this.isbn);      System.out.println("Author: " + this.author);      System.out.println("Title: " + this.title);      System.out.println("Country: " + this.country);   } }

You may possibly do this:
out.println("<script type=\"text/javascript\">"); out.println("alert('User or password incorrect, please try again');"); out.println("location='login.jsp';"); out.println("</script>");

On DB Crash and restart the JBoss 6.2 EAP server is not able to reconnect to the MySQL database with the connections from the connection pool. I get Broken Pipe error after adding the autoReconnect connection property. Only after the restart of the JBoss application server it works fine.

<datasources> <datasource jndi-name="java:jboss/datasources/MySqlDS" pool-name="MySqlDS" enabled="true"> <connection-url>jdbc:mysql://xx.xxx.xx.xxx:3306/myDatabase</connection-url> <driver>mysql</driver> <connection-property name="autoReconnect">true</connection-property> <pool> <flush-strategy>IdleConnections</flush-strategy> </pool> <security> <user-name>xxxx</user-name> <password>xxxxxxx</password> </security> <validation> <background-validation>true</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter"></exception-sorter> </validation> <timeout> <idle-timeout-minutes>2</idle-timeout-minutes> </timeout> </datasource> <drivers> <driver name="mysql" module="com.mysql"> <driver-class>com.mysql.jdbc.Driver</driver-class> </driver> </drivers> </datasources>



server.log

Caused by: org.hibernate.TransactionException: rollback failed
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:215)
at org.springframework.orm.hibernate4.HibernateTransactionManager.doRollback(HibernateTransactionManager.java:574)
... 72 more
Caused by: org.hibernate.TransactionException: unable to rollback against JDBC connection
at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doRollback(JdbcTransaction.java:167)
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:209)
... 73 more
Caused by: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:

** BEGIN NESTED EXCEPTION **

java.net.SocketException
MESSAGE: Broken pipe

STACKTRACE:

java.net.SocketException: Broken pipe
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(Unknown Source)
at java.net.SocketOutputStream.write(Unknown Source)
at java.io.BufferedOutputStream.flushBuffer(Unknown Source)

----skipped lines----

at java.lang.Thread.run(Unknown Source)
** END NESTED EXCEPTION **
Last packet sent to the server was 0 ms ago.
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2759)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1612)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1723)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3277)
at com.mysql.jdbc.Connection.setAutoCommit(Connection.java:5442)
at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.checkTransaction(BaseWrapperManagedConnection.java:886)

At line 33 fetchNextWorkingDay method is called recursively

Add hidden type form element in html and read the value in Servlet using request.getParameter
<input type="hidden" name="flag" value="1"/> <input type="hidden" name="operation" value="1"/>

Below are description of struts elements:
textfield - A text control for the "user" property is rendered. The label is also retrieved from a ResourceBundle via the key attribute
label - A label is rendered. The label is retrieved from a ResourceBundle via the key attribute

Below code snippet should display only one label
<tr> <td><s:textfield name="collegeName" size="50"/></td> </tr>

Data to be used by JSPs is generally passed to it as a request attribute by a servlet.

To run the index.html by default for the url localhost:8080/test add the below welcome-file-list tag in web.xml

<welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>Home.jsp</welcome-file> </welcome-file-list>

how to write url without to specify each time the port like in apache http "http://localhost"

Change conf/server.xml file in tomcat server from the default port 8080 to 80 (Default http port). Restart the server after making the configuration changes and access the application using http://localhost
For reference

Below is the updated web.xml. Each servlet and servlet mapping tag is defined for a particular servlet. As you had added multiple servlets under servlet and servlet mapping tag, this resulted in the different servlet response which you are facing.

<?xml version="1.0" encoding="ISO-8859-1"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> <servlet> <servlet-name>TestServlet</servlet-name> <servlet-class>testservlet.TestServlet</servlet-class> </servlet> <servlet> <servlet-name>form</servlet-name> <servlet-class>testservlet.form</servlet-class> </servlet> <servlet-mapping> <servlet-name>TestServlet</servlet-name> <url-pattern>/test2</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>form</servlet-name> <url-pattern>/test1</url-pattern> </servlet-mapping> </web-app>

As per javadocs System.getEnv method has been deprecated and it recommend using System.getProperty. Hope this should resolve the environment variable issue.

String ejbcaHomeDir = System.getProperty("EJBCA_HOME");

As updated in above threads the issue is related to quotes. Similar question has been answered and resolved in another post - Click here

Test the below code and verify if it works as you expected. Hope the below code helps

rs1=ps1.executeQuery(); boolean isChecked = false; while(rs1.next()){ String sId = rs1.getString(1); count+=1; String tr = cvm.tableRow(count); if(sId.equals(specialty_id)){ isChecked = true; break; } } if(isChecked){ displayCatCheckbox+="<td ><input type=checkbox name=specialty_id value=\""+specialty_id+"\" checked></td><td >"+specialty+"</td>"+tr; } else{ displayCatCheckbox+="<td ><input type=checkbox name=specialty_id value=\""+specialty_id+"\"></td><td >"+specialty+"</td>"+tr; }

You need to set few Context properties like Context.INITIAL_CONTEXT_FACTORY, Context.PROVIDER_URL before performing the JNDI Lookup.

Hashtable ht = new Hashtable(); ht.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory"); ht.put(Context.PROVIDER_URL, "t3://hostname:port"); ctx = new InitialContext(ht);
Click here for more details

Each time you fetch connection from the pool after performing db operation verify if the connection is released back to the pool by performing connection.close()