Java Farms: January 2015

Friday, January 30, 2015

HOW TO GET DISPLAY TAG CURRENT PAGE NUMBER IN ACTION CLASS

String currentPage = request.getParameter((new ParamEncoder("tableId").encodeParameterName(TableTagParameters.PARAMETER_PAGE)));

session-timeout in web.xml vs setMaxInactiveInterval method

WEB.XML

<session-config>
<session-timeout>10</session-timeout>
</session-config>

Info : session timeout configured in web.xml will be applied to whole application's all sessions.
Here session timeout has value in minutes. means all the sessions in the whole application will be terminated if user not performing any action on the respective session for 10mins

JAVA

mySession.setMaxInactiveInterval(10);
Info:
setMaxInactiveInterval() method takes value in seconds.
so here mySession will be terminated after 10sec.

Thursday, January 29, 2015

BOOTSTRAP : HOW TO SHOW BOOTSTRAP CONFIRMATION DIALOGUE

JSP
<html lang="en">

<head>
<script src="${pageContext.request.contextPath}/jquery/jquery.js"></script>
<script src="${pageContext.request.contextPath}/bootstrap/js/bootstrap.js"></script>
<script src="${pageContext.request.contextPath}/bootstrap/js/bootstrap-tooltip.js"></script>

<script src="${pageContext.request.contextPath}/bootstrap/js/bootstrap-confirmation.js"></script>

</head>

<body>

<a class="btn" data-href="/pkg/Pkg/delete?
pkgId=${pkgData.id}&pkgName=${pkgData.name}"
data-toggle="confirmation"
data-placement="left"
data-popout="true"
data-singleton="true"
data-original-title="" title="">

<img src="${pageContext.request.contextPath}/images/delete.jpg" />
</a>
</body>
</html>

JAVA SCRIPT
$(document).ready(function() {

$('[data-toggle="confirmation"]').confirmation({
title : 'Are you sure ?',
animation : true,
popout: true,
btnOkLabel : 'Yes',
btnCancelLabel : 'No',
onConfirm : function() {
},
onCancel : function() {
$('[data-toggle="confirmation"]').confirmation('hide');
}

});

});

Wednesday, January 28, 2015

HOW TO DISPLAY ROW NUMBER IN DISPLAY TAG

<display:table id="pkgData" name="pkgsList" requestURI="/pkg/Pkg/search">

<display:column title="Sr.#" >${pkgData_rowNum}</display:column>

</display:table>

Tuesday, January 27, 2015

STRUTS2 UNKNOWN ACTION HANDLER CLASS (UnknownHandler)

struts.xml

<struts>

<bean type="com.opensymphony.xwork2.UnknownHandler" name="handler" class="com.raj.mv.pd.controller.pkg.UnknownActionController"/>
...
...

</struts>

UNKNOWN ACTION HANDLER

import org.apache.struts2.dispatcher.Dispatcher;

import com.raj.commons.logging.LogManager;
import com.raj.mv.pd.constants.Results;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.Result;
import com.opensymphony.xwork2.UnknownHandler;
import com.opensymphony.xwork2.XWorkException;
import com.opensymphony.xwork2.config.ConfigurationManager;
import com.opensymphony.xwork2.config.RuntimeConfiguration;
import com.opensymphony.xwork2.config.entities.ActionConfig;

public class UnknownActionController implements UnknownHandler{
public static final String MODULE = UnknownActionController.class.getSimpleName();

@Override
public ActionConfig handleUnknownAction(String namespace, String actionName) throws XWorkException {

LogManager.getLogger().debug(MODULE,"Method called handleUnknownAction()");

ConfigurationManager configurationManager = Dispatcher.getInstance().getConfigurationManager();
RuntimeConfiguration runtimeConfiguration = configurationManager.getConfiguration().getRuntimeConfiguration();
ActionConfig actionConfig = runtimeConfiguration.getActionConfig(namespace, actionName);

if(actionConfig == null) { // invalid url request, and this need to be handled
actionConfig = runtimeConfiguration.getActionConfig("", "pkg/Pkg/error");
}
return actionConfig;
}

@Override
public Object handleUnknownActionMethod(Object arg0, String arg1) throws NoSuchMethodException {
LogManager.getLogger().debug(MODULE,"Method called handleUnknownActionMethod()");
return Results.EXCEPTION;
}

@Override
public Result handleUnknownResult(ActionContext arg0, String arg1, ActionConfig arg2, String arg3) throws XWorkException {
LogManager.getLogger().debug(MODULE,"Method called handleUnknownResult()");
return null;
}

}

Monday, January 26, 2015

STRUTS2 Display exception detail on the JSP

To Display exception message

<s:label label="Exception :" value='%{exception}' />

To Display exception stack stack

<s:label label="Exception :" value='%{exceptionStack}' />

Wednesday, January 21, 2015

STRUTS2 AJAX AND JSON BASED VALIDATION

struts.xml

<package name="validationPkg" namespace="/validate" extends="json-default">

<interceptors>
<interceptor name="transaction" class="com.raj.controller.interceptor.TransactionInterceptor" />
</interceptors>

<action name="*/*/*" class="com.raj.controller.{1}.{2}CTRL" method="{3}">
<interceptor-ref name="basicStack"></interceptor-ref>
<interceptor-ref name="transaction"/>
<result type="json">
<param name="root">validationMessage</param>
</result>
</action>

</package>

Action Class

package com.raj.controller.pkg;

public class PkgCTRL extends ActionSupport {

private ValidationMessage validationMessage = new ValidationMessage();

public ValidationMessage getValidationMessage() {
return validationMessage;
}

public void setValidationMessage(ValidationMessage validationMessage) {
this.validationMessage = validationMessage;
}

public String doValidation(){
LogManager.getLogger().debug(MODULE,"Method called doValidation()");

PkgData pkgData = PkgDAO.getPkgByName(packageName);
getValidationMessage().setMessageCode(ValidationMessage.ERROR);
if( packageName == null || packageName.trim().length() == 0 ){
getValidationMessage().setMessage(getText("empty.name"));

}else if( packageName.matches(getText("name.validation.regex")) ){
if( pkgData != null ){
getValidationMessage().setMessage(getText("name.already.exist"));
}else{
getValidationMessage().setMessage("Valid Name");
getValidationMessage().setMessageCode(ValidationMessage.SUCCESS);
}
}else{
getValidationMessage().setMessage(getText("invalid.name"));
}
return Results.SUCCESS;
}
}

POJO CLASS

public class ValidationMessage {

public final static short SUCCESS = 1;
public final static short ERROR = 0;

private String message;
private short messageCode;

public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public int getMessageCode() {
return messageCode;
}
public void setMessageCode(short messageCode) {
this.messageCode = messageCode;
}

}

KEY ENUM

public enum ValidationKeys {

EMPTY_NAME("empty.name"),
NAME_VALIDATION_REGEX("name.validation.regex"),
NAME_ALREADY_EXIST("name.already.exist"),
INVALID_NAME("invalid.name"),
VALID_NAME("valid.name"),;

public String key;
ValidationKeys(String key){
this.key = key;
}

}

ApplicationResources_en.properties

#Ajax validation messages
invalid.name = Invalid Name (Only alphanumeric Allowed)
empty.name = Empty Name
name.already.exist = Name already exist

name.validation.regex = ^[a-zA-Z0-9]*$

Validation Js file

/*
verifyUniqueness() require two arguments 'fieldId' and 'actionName', it makes an AJAX call to the
passed action's validation method and it return the appropriate result message.
Invalid fielId message will be displayed in red color and valid fielId message will be displayed in green color.
Here 'actionName' value will be like '/validate/pkg/Pkg/validation'
in this action value '/validate' is the namespace value in struts.xml file and remaining value will be mapped dynamically to the respective
action's method through wildcard used in the struts.xml file.
*/
function verifyUniqueness(fieldId,actionName){
var pkgNameVal = $("#"+fieldId).val();
clearErrorMessages(null);
$.ajax({
type: "POST",
url: contextPath+actionName,
data: {packageName:pkgNameVal},
success: function(data){
if(data.messageCode == "1"){
// success code logic
}else{
// error code logic
}
callback(data);
},
error: function(data){
console.log(data);
}
});
}

function callback(data){
console.log(data);

}

JSP FILE FIELD

<s:textfield name="pkgData.name" key="getText('pkg.name')" id="pkgName" cssClass="form-control" onblur="verifyUniqueness('pkgName','/validate/pkg/Pkg/doValidation');" />

Tuesday, January 20, 2015

Monday, January 19, 2015

How to make AJAX call to Struts2 action class method using Wildcard in struts.xml file

STRUTS.XML

<package name="validationPkg" namespace="/validate" extends="json-default">

<interceptors>
<interceptor name="transaction" class="com.raj.TransactionInterceptor" />
</interceptors>

<action name="*/*/*" class="com.raj.controller.{1}.{2}CTRL" method="{3}">
<interceptor-ref name="basicStack"></interceptor-ref>
<interceptor-ref name="transaction"/>
<result type="stream">
<param name="contentType">text/html</param>
<param name="inputName">inputStream</param>
</result>
</action>

</package>

ACITON CLASS METHOD

private String packageName;

private InputStream inputStream;

public InputStream getInputStream() {
return inputStream;
}
public void setInputStream(String responseText) {
this.inputStream = new ByteArrayInputStream(responseText.getBytes());

}

public String doValidation(){

PkgData pkgData = PkgDAO.getPkgByName(packageName);

if( packageName==null || packageName.trim().length()==0 ){
setInputStream("<div style='color:red;'> Empty Name");

}else if( packageName.matches(NVSMXUtility.NAME_VALIDATION_REGEX_PATTERN) ){
if( pkgData != null ){
setInputStream("<div style='color:red;'> Name already exist</div>");
}else{
setInputStream("<div style='color:green;'> Valid Name</div>");
}
}else{
setInputStream("<div style='color:red;'> Invalid Name (Only alphanumeric allowed)</div>");
}
return Results.SUCCESS;

}

JAVA SCRIPT

function verifyUniqueness(fieldName,actionName){
var pkgNameVal = $("#"+fieldName).val();
$.ajax({
type: "POST",
url: '/nvsmx/'+actionName,
data: {packageName:pkgNameVal},
success: function(data){
$("#message").show();
$("#message").html(data);
}
});

}

JSP

<s:textfield name="pkgData.name" id="pkgName" onblur="verifyUniqueness('pkgName','/validate/pkg/Pkg/doValidation');" />

Monday, January 12, 2015

STRUTS2 Interceptor to manage Hibernate Transcation

package com.raj.nvsmx.pd.controller.interceptor;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.raj.commons.logging.LogManager;
import com.raj.nv.pd.constants.Results;
import com.raj.nv.pd.model.HibernateSessionFactory;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.PreResultListener;

/**
* @author kirpalsinh.raj
* This Interceptor class is used to begin/commit/rollback Hibernate session transaction as per the result returned from the action classes.
*
*/

public class TransactionInterceptor extends BaseInterceptor {

private static final long serialVersionUID = 1L;
private static final String MODULE = TransactionInterceptor.class.getSimpleName();

Transaction transaction = null;
Session session = null;
String actionName;

@Override
public String intercept(ActionInvocation parentActionInvocation) throws Exception {

try {

session = HibernateSessionFactory.getSession();
transaction = session.beginTransaction();
actionName = parentActionInvocation.getProxy().getActionName();

parentActionInvocation.addPreResultListener( new PreResultListener() {
@Override
public void beforeResult(ActionInvocation childActionInvocation, String result) {
if (transaction != null && Results.SUCCESS.equalsIgnoreCase(result)) {
transaction.commit();
LogManager.getLogger().info(MODULE,"Transaction committed successfully for action "+actionName);
} else {
rollbackTranscation();
}
}
});

return parentActionInvocation.invoke();

} catch (Exception ex) {
LogManager.getLogger().error(MODULE,"Transaction Failed for action "+actionName+". Reason: " + ex.getMessage());
rollbackTranscation();
return Results.ERROR;

} finally {
closeSession();
}
}

public void rollbackTranscation(){
LogManager.getLogger().warn(MODULE,"Rollback Transaction for action "+actionName);
try {
if (transaction != null && transaction.isActive()) {
transaction.rollback();
}
} catch (Exception ex) {
LogManager.getLogger().error(MODULE,"Failed to Rollback Transaction for action "+actionName+". Reason: " + ex.getMessage());
}
}

public void closeSession(){
try {
if (session != null) {
session.close();
}
} catch (HibernateException ex) {
LogManager.getLogger().error(MODULE,"Failed to close Session for action "+actionName+". Reason: " + ex.getMessage());
}
}
}

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Thursday, January 8, 2015

STRUTS2 JQURY PLUGIN + STRUTS2 JSON PLUGIN EXAMPLE

OUTPUT

JSP

<%@taglib uri="/struts-jquery-tags" prefix="sj"%>

<%@ taglib uri="/struts-tags" prefix="s"%>

<html>

<head>

<sj:head jquerytheme="flick" jqueryui="true" />

</head>

$(document).ready(function() {

$('#states').change(function(event) {

var state = $("select#states").val();

$.getJSON('/nvsmx/jsonSelectAction.action', {

stateName : state

}, function(jsonResponse) {

$('#message').text(jsonResponse.message);

var select = $('#cities');

select.find('option').remove();

$.each(jsonResponse.cityMap, function(key, value) {

$('<option>').val(key).text(value).appendTo(select);

});

</script>

<body>

<h1>Welcome to AJAX + JSON</h1>

<sj:tabbedpanel id="localtabs" cssClass="list">

<sj:tab id="tab1" target="tone" label="Ajax" />

<sj:tab id="tab2" target="ttwo" label="getJSON" />

<sj:tab id="tab3" target="tthree" label="JSON-ACTION" />

<sj:tab id="tab4" target="tfour" label="JSON-SELECT" />

<sj:div id="resultDiv">

</sj:div>

<s:form id="form" namespace="/" action="ajax/Ajax/ajax" method="post">

<s:textfield id="id" name="id" value="1" label="ID" />

<br>

<sj:submit value="Submit" targets="resultDiv" />

</s:form>

</div>

<s:form id="form2" namespace="/" action="jsonMethoAction"

method="post">

<sj:submit value="JSON METHOD" />

</s:form>

</div>

<s:form id="form3" namespace="/" action="jsonAction" method="post">

<sj:submit value="JSON ACTION" />

</s:form>

</div>

<s:url var="remoteurl" namespace="/" value="/jsonAction.action"/>

<sj:select href="%{remoteurl}"

id="states"

name="states"

list="stateList"

emptyOption="false"

headerKey="-1"

headerValue="Please Select a Language"/>

</div>

</sj:tabbedpanel>

</body>

</html>

CONTROLLER/ACTION

;

package com.el.nvsmx.pd.controller.json

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import com.opensymphony.xwork2.Action;

public class JsonCTRL {

private List<String> stateList = new ArrayList<String>();

private Map<String, String> cityMap = new HashMap<String, String>();

private String stateName;

private String message;

public String execute() {

System.out.println("CALLED EXECUTE()");

if ("Gujarat".equals(stateName)) {

setMessage("Welcome to GUJARAT");

getCityMap().put("1", "Anand");

getCityMap().put("2", "V.V.Nagar");

getCityMap().put("3", "Baroda");

getCityMap().put("4", "Ahmedabad");

} else if ("Rajasthan".equals(stateName)) {

setMessage("Welcome to Rajasthan");

getCityMap().put("1", "Jaipur");

getCityMap().put("2", "Udepur");

}

return Action.SUCCESS;

}

public String getJSON(){

getStateList().add("Gujarat");

getStateList().add("Rajasthan");

return execute();

}

public JsonCTRL(){

}

public String getStateName() {

return stateName;

}

public void setStateName(String stateName) {

this.stateName = stateName;

}

public String getMessage() {

return message;

}

public void setMessage(String message) {

this.message = message;

}

public Map<String, String> getCityMap() {

return cityMap;

}

public void setCityMap(Map<String, String> cityMap) {

this.cityMap = cityMap;

}

public List<String> getStateList() {

return stateList;

}

public void setStateList(List<String> stateList) {

this.stateList = stateList;

}

package com.el.nvsmx.pd.controller.ajax;

import java.io.IOException;

import java.util.ArrayList;

import java.util.LinkedHashMap;

import java.util.List;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.interceptor.ServletRequestAware;

import org.apache.struts2.interceptor.ServletResponseAware;

import com.elitecore.nvsmx.policydesigner.constants.Results;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.Preparable;

public class AjaxCTRL extends ActionSupport implements ServletRequestAware,

ServletResponseAware, Preparable {

private static final long serialVersionUID = 1L;

private static final String MODULE = AjaxCTRL.class.getSimpleName();

private HttpServletRequest request;

private HttpServletResponse response;

private Map<String, String> stateMap = new LinkedHashMap<String, String>();

private List<String> dataList = new ArrayList<String>();

public String list() {

return Results.LIST;

}

public String getJSON() {

dataList.add("First");

return "Hello i am Json Result";

}

public String ajax() {

String key = request.getParameter("id");

String result = stateMap.get(key);

System.out.println("Name: " + result);

if (result == null) {

result = "Unknown";

}

try {

response.getWriter().write("your are in " + result + " state of INDIA.");

} catch (IOException e) {

System.out.println("Error: " + e.getMessage());

e.printStackTrace();

}

return null;

}

@Override

public void setServletRequest(HttpServletRequest request) {

this.request = request;

}

@Override

public void setServletResponse(HttpServletResponse response) {

this.response = response;

}

@Override

public void prepare() throws Exception {

System.out.println("Called prepare()");

if (stateMap.size() == 0) {

System.out.println("Initializing Map");

stateMap.put("1", "Kerala");

stateMap.put("2", "Tamil Nadu");

stateMap.put("3", "Jammu Kashmir");

stateMap.put("4", "Assam");

stateMap.put("5", "Gujarat");

stateMap.put("6", "Goa");

stateMap.put("7", "Maharastra");

stateMap.put("8", "Rajasthan");

}

STRUTS.XML

</action>

</action>

</action>

<result name="success" type="json" >/view/commons/Success.jsp</result>

</action>

</package>

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Java Farms

Friday, January 30, 2015

HOW TO GET DISPLAY TAG CURRENT PAGE NUMBER IN ACTION CLASS

session-timeout in web.xml vs setMaxInactiveInterval method

Thursday, January 29, 2015

BOOTSTRAP : HOW TO SHOW BOOTSTRAP CONFIRMATION DIALOGUE

Wednesday, January 28, 2015

HOW TO DISPLAY ROW NUMBER IN DISPLAY TAG

Tuesday, January 27, 2015

STRUTS2 UNKNOWN ACTION HANDLER CLASS (UnknownHandler)

Monday, January 26, 2015

STRUTS2 Display exception detail on the JSP

Wednesday, January 21, 2015

STRUTS2 AJAX AND JSON BASED VALIDATION

Tuesday, January 20, 2015

HOW TO USE ENUM IN STRUTS2 SELECT TAG

Monday, January 19, 2015

How to make AJAX call to Struts2 action class method using Wildcard in struts.xml file

Monday, January 12, 2015

STRUTS2 Interceptor to manage Hibernate Transcation

Thursday, January 8, 2015

STRUTS2 JQURY PLUGIN + STRUTS2 JSON PLUGIN EXAMPLE

Scrum and Scrum master