{"id":1374,"date":"2012-06-19T01:00:00","date_gmt":"2012-06-19T01:00:00","guid":{"rendered":"http:\/\/www.javacodegeeks.com\/2012\/10\/full-webapplication-jsf-ejb-jpa-jaas-part-2.html"},"modified":"2012-10-22T05:33:19","modified_gmt":"2012-10-22T05:33:19","slug":"full-webapplication-jsf-ejb-jpa-jaas_19","status":"publish","type":"post","link":"https:\/\/www.javacodegeeks.com\/2012\/06\/full-webapplication-jsf-ejb-jpa-jaas_19.html","title":{"rendered":"Full WebApplication JSF EJB JPA JAAS – Part 2"},"content":{"rendered":"
View \u2013 Creation and JSF set up<\/strong><\/p>\n

This tutorial continues from part 1<\/a>.<\/p>\n

Let us create a new Dynamic Web Project<\/em><\/strong>. Create it like the image bellow:<\/p>\n

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Pay attention: in some moment the Eclipse will ask you if you want to add the JSF Capabilities (auto complete), enable it. Like the screens bellow:<\/p>\n

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After the project creation, let us edit the \u201cweb.xml\u201d file; it should have the same code as bellow: <\/p>\n

<?xml version='1.0' encoding='UTF-8'?>\r\n<web-app xmlns:xsi='http:\/\/www.w3.org\/2001\/XMLSchema-instance'\r\n xmlns='http:\/\/java.sun.com\/xml\/ns\/javaee' xmlns:web='http:\/\/java.sun.com\/xml\/ns\/javaee\/web-app_2_5.xsd'\r\n xsi:schemaLocation='http:\/\/java.sun.com\/xml\/ns\/javaee http:\/\/java.sun.com\/xml\/ns\/javaee\/web-app_3_0.xsd'\r\n id='WebApp_ID' version='3.0'>\r\n <display-name>CrudJSF<\/display-name>\r\n <welcome-file-list>\r\n  <welcome-file>pages\/protected\/user\/listAllDogs.xhtml<\/welcome-file>\r\n <\/welcome-file-list>\r\n <servlet>\r\n  <servlet-name>Faces Servlet<\/servlet-name>\r\n  <servlet-class>javax.faces.webapp.FacesServlet<\/servlet-class>\r\n  <load-on-startup>1<\/load-on-startup>\r\n <\/servlet>\r\n <servlet-mapping>\r\n  <servlet-name>Faces Servlet<\/servlet-name>\r\n  <url-pattern>\/faces\/*<\/url-pattern>\r\n  <url-pattern>*.jsf<\/url-pattern>\r\n  <url-pattern>*.xhtml<\/url-pattern>\r\n <\/servlet-mapping>\r\n\r\n <!-- Protected area definition -->\r\n <security-constraint>\r\n  <web-resource-collection>\r\n   <web-resource-name>Restricted Area - ADMIN Only<\/web-resource-name>\r\n   <url-pattern>\/pages\/protected\/admin\/*<\/url-pattern>\r\n  <\/web-resource-collection>\r\n  <auth-constraint>\r\n   <role-name>ADMIN<\/role-name>\r\n  <\/auth-constraint>\r\n <\/security-constraint>\r\n <security-constraint>\r\n  <web-resource-collection>\r\n   <web-resource-name>Restricted Area - USER and ADMIN<\/web-resource-name>\r\n   <url-pattern>\/pages\/protected\/user\/*<\/url-pattern>\r\n  <\/web-resource-collection>\r\n  <auth-constraint>\r\n   <role-name>USER<\/role-name>\r\n   <role-name>ADMIN<\/role-name>\r\n  <\/auth-constraint>\r\n <\/security-constraint>\r\n\r\n <!-- Login page -->\r\n <login-config>\r\n  <auth-method>FORM<\/auth-method>\r\n  <form-login-config>\r\n   <form-login-page>\/pages\/public\/login.xhtml<\/form-login-page>\r\n   <form-error-page>\/pages\/public\/loginError.xhtml<\/form-error-page>\r\n  <\/form-login-config>\r\n <\/login-config>\r\n\r\n <!-- System roles -->\r\n <security-role>\r\n  <role-name>ADMIN<\/role-name>\r\n <\/security-role>\r\n <security-role>\r\n  <role-name>USER<\/role-name>\r\n <\/security-role>\r\n<\/web-app><\/pre>\n
You do not have to worry if some warning\/error shows up; we will solve them later. Notice that I have added all the JAAS code that we will need (If you want a detailed post about these JAAS configurations you can check it here: User Login Validation with JAAS and JSF<\/a>).        <\/p>\n
According to the JAAS configurations a regular user (USER role) will only see the files inside the user folder, that will be only the listing of the dogs recorded in our database; the ADMIN will be able to do all the CRUD actions because all the pages are inside the admins folder.        <\/p>\n
Our \u201cfaces-config.xml\u201d should have the code bellow:        <\/p>\n
<?xml version='1.0' encoding='UTF-8'?>\r\n\r\n<faces-config\r\n    xmlns='http:\/\/java.sun.com\/xml\/ns\/javaee'\r\n    xmlns:xsi='http:\/\/www.w3.org\/2001\/XMLSchema-instance'\r\n    xsi:schemaLocation='http:\/\/java.sun.com\/xml\/ns\/javaee http:\/\/java.sun.com\/xml\/ns\/javaee\/web-facesconfig_2_0.xsd'\r\n    version='2.0'>\r\n\r\n <navigation-rule>\r\n  <navigation-case>\r\n   <from-outcome>logout<\/from-outcome>\r\n   <to-view-id>\/pages\/protected\/user\/listAllDogs.xhtml<\/to-view-id>\r\n   <redirect\/>\r\n  <\/navigation-case>\r\n <\/navigation-rule>\r\n <navigation-rule>\r\n  <navigation-case>\r\n   <from-outcome>listAllDogs<\/from-outcome>\r\n   <to-view-id>\/pages\/protected\/user\/listAllDogs.xhtml<\/to-view-id>\r\n  <\/navigation-case>\r\n <\/navigation-rule>\r\n <navigation-rule>\r\n  <navigation-case>\r\n   <from-outcome>createDog<\/from-outcome>\r\n   <to-view-id>\/pages\/protected\/admin\/createDog.xhtml<\/to-view-id>\r\n   <redirect\/>\r\n  <\/navigation-case>\r\n <\/navigation-rule>\r\n <navigation-rule>\r\n  <navigation-case>\r\n   <from-outcome>updateDog<\/from-outcome>\r\n   <to-view-id>\/pages\/protected\/admin\/updateDog.xhtml<\/to-view-id>\r\n  <\/navigation-case>\r\n <\/navigation-rule>\r\n <navigation-rule>\r\n  <navigation-case>\r\n   <from-outcome>deleteDog<\/from-outcome>\r\n   <to-view-id>\/pages\/protected\/admin\/deleteDog.xhtml<\/to-view-id>\r\n  <\/navigation-case>\r\n <\/navigation-rule>\r\n\r\n <application>\r\n  <resource-bundle>\r\n   <base-name>messages<\/base-name>\r\n   <var>msgs<\/var>\r\n  <\/resource-bundle>\r\n <\/application>\r\n\r\n<\/faces-config><\/pre>\n
Notice that to some actions I used the redirect action. With this action we will update the requested link in the URL bar of the browser, after the URL get updated the JAAS will deny access to an illegal user.        <\/p>\n
We also have a file that will contain all the messages of our system. You will notice that all the texts displayed in our pages are in this file (create a file named \u201cmessages.properties\u201d inside the src folder):        <\/p>\n
#Dog\r\ndog=Dog\r\ndogName=Name\r\ndogWeight=Weight\r\n\r\n#Dog messages\r\ndogCreateHeader=Create a new Dog\r\ndogUpdateHeader=Update the Dog\r\ndogDeleteHeader=Delete this Dog\r\ndogNameRequired=The dog needs a name.\r\ndogWeightRequired=The dog needs a weight.\r\n\r\n#Actions\r\nupdate=Update\r\ncreate=Create\r\ndelete=Delete\r\ncancel=Cancel\r\n\r\n#Login\r\nloginHello=Hello\r\nloginErrorMessage=Could not login. Check you UserName\/Password\r\nloginUserName=Username\r\nloginPassword=Password\r\nlogout=Log Out<\/pre>\n
View \u2013 Creation and JSF set up<\/strong>       <\/p>\n
Let us now create the ManagedBeans.        <\/p>\n
First, we need to add the EJB to the Web Project. Right click with your mouse on the JSF project > Properties:<\/p>\n
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Java Build Path > Projects > Add > Check CrudEJB > OK<\/p>\n
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First, let us create the DogMB:        <\/p>\n
package com.mb;\r\n\r\nimport java.util.List;\r\n\r\nimport javax.ejb.EJB;\r\nimport javax.ejb.EJBException;\r\nimport javax.faces.application.FacesMessage;\r\nimport javax.faces.bean.ManagedBean;\r\nimport javax.faces.bean.RequestScoped;\r\nimport javax.faces.context.FacesContext;\r\n\r\nimport com.facade.DogFacade;\r\nimport com.model.Dog;\r\n\r\n@ManagedBean\r\n@RequestScoped\r\npublic class DogMB {\r\n\r\n @EJB\r\n private DogFacade dogFacade;\r\n\r\n private static final String CREATE_DOG = 'createDog';\r\n private static final String DELETE_DOG = 'deleteDog';\r\n private static final String UPDATE_DOG = 'updateDog';\r\n private static final String LIST_ALL_DOGS = 'listAllDogs';\r\n private static final String STAY_IN_THE_SAME_PAGE = null;\r\n\r\n private Dog dog;\r\n\r\n public Dog getDog() {\r\n\r\n  if(dog == null){\r\n   dog = new Dog();\r\n  }\r\n\r\n  return dog;\r\n }\r\n\r\n public void setDog(Dog dog) {\r\n  this.dog = dog;\r\n }\r\n\r\n public List<Dog> getAllDogs() {\r\n  return dogFacade.findAll();\r\n }\r\n\r\n public String updateDogStart(){\r\n  return UPDATE_DOG;\r\n }\r\n\r\n public String updateDogEnd(){\r\n  try {\r\n   dogFacade.update(dog);\r\n  } catch (EJBException e) {\r\n   sendErrorMessageToUser('Error. Check if the weight is above 0 or call the adm');\r\n   return STAY_IN_THE_SAME_PAGE;\r\n  }\r\n\r\n  sendInfoMessageToUser('Operation Complete: Update');\r\n  return LIST_ALL_DOGS;\r\n }\r\n\r\n public String deleteDogStart(){\r\n  return DELETE_DOG;\r\n }\r\n\r\n public String deleteDogEnd(){\r\n  try {\r\n   dogFacade.delete(dog);\r\n  } catch (EJBException e) {\r\n   sendErrorMessageToUser('Error. Call the ADM');\r\n   return STAY_IN_THE_SAME_PAGE;\r\n  }   \r\n\r\n  sendInfoMessageToUser('Operation Complete: Delete');\r\n\r\n  return LIST_ALL_DOGS;\r\n }\r\n\r\n public String createDogStart(){\r\n  return CREATE_DOG;\r\n }\r\n\r\n public String createDogEnd(){\r\n  try {\r\n   dogFacade.save(dog);\r\n  } catch (EJBException e) {\r\n   sendErrorMessageToUser('Error. Check if the weight is above 0 or call the adm');\r\n\r\n   return STAY_IN_THE_SAME_PAGE;\r\n  }  \r\n\r\n  sendInfoMessageToUser('Operation Complete: Create');\r\n\r\n  return LIST_ALL_DOGS;\r\n }\r\n\r\n public String listAllDogs(){\r\n  return LIST_ALL_DOGS;\r\n }\r\n\r\n private void sendInfoMessageToUser(String message){\r\n  FacesContext context = getContext();\r\n  context.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, message, message));\r\n }\r\n\r\n private void sendErrorMessageToUser(String message){\r\n  FacesContext context = getContext();\r\n  context.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, message, message));\r\n }\r\n\r\n private FacesContext getContext() {\r\n  FacesContext context = FacesContext.getCurrentInstance();\r\n  return context;\r\n }\r\n}<\/pre>\n
About the code above:        
 
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