Seam リファレンスガイド

<process-definition name="todo">
  
  <start-state name="start">                                    
    <transition to="todo"/>
  </start-state>
  
  <task-node name="todo">                                       
    <task name="todo" description="#{todoList.description}">    
      <assignment actor-id="#{actor.id}"/>                      
    </task>
    <transition to="done"/>
  </task-node>
  
  <end-state name="done"/>                                      
  
</process-definition>

<process-definition name="todo">
  
  <start-state name="start">                                    
    <transition to="todo"/>
  </start-state>
  
  <task-node name="todo">                                       
    <task name="todo" description="#{todoList.description}">    
      <assignment actor-id="#{actor.id}"/>                      
    </task>
    <transition to="done"/>
  </task-node>
  
  <end-state name="done"/>                                      
  
</process-definition>

@Name("todoList")
public class TodoList
{
   private String description;                       
   
   public String getDescription()
   {
      return description;
   }

   public void setDescription(String description)
   {
      this.description = description;
   }
   
   @CreateProcess(definition="todo")                 
   public void createTodo() {}
   
   @StartTask @EndTask                               
   public void done() {}

}

@Name("todoList")
public class TodoList
{
   private String description;                       
   
   public String getDescription()
   {
      return description;
   }

   public void setDescription(String description)
   {
      this.description = description;
   }
   
   @CreateProcess(definition="todo")                 
   public void createTodo() {}
   
   @StartTask @EndTask                               
   public void done() {}

}

<pageflow-definition 
    xmlns="http://jboss.com/products/seam/pageflow"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://jboss.com/products/seam/pageflow 
                        http://jboss.com/products/seam/pageflow-2.2.xsd"
    name="numberGuess">
  
  <start-page name="displayGuess" view-id="/numberGuess.jspx">                        
    <redirect/>
    <transition name="guess" to="evaluateGuess">                                      
      <action expression="#{numberGuess.guess}"/>                                     
    </transition>
    <transition name="giveup" to="giveup"/>
    <transition name="cheat" to="cheat"/>
  </start-page>
  
  <decision name="evaluateGuess" expression="#{numberGuess.correctGuess}">            
    <transition name="true" to="win"/>
    <transition name="false" to="evaluateRemainingGuesses"/>
  </decision>
  
  <decision name="evaluateRemainingGuesses" expression="#{numberGuess.lastGuess}">
    <transition name="true" to="lose"/>
    <transition name="false" to="displayGuess"/>
  </decision>
  
  <page name="giveup" view-id="/giveup.jspx">
    <redirect/>
    <transition name="yes" to="lose"/>
    <transition name="no" to="displayGuess"/>
  </page>
  
  <process-state name="cheat">
    <sub-process name="cheat"/>
    <transition to="displayGuess"/>
  </process-state>
  
  <page name="win" view-id="/win.jspx">
    <redirect/>
    <end-conversation/>
  </page>
  
  <page name="lose" view-id="/lose.jspx">
    <redirect/>
    <end-conversation/>
  </page>
  
</pageflow-definition>

<pageflow-definition 
    xmlns="http://jboss.com/products/seam/pageflow"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://jboss.com/products/seam/pageflow 
                        http://jboss.com/products/seam/pageflow-2.2.xsd"
    name="numberGuess">
  
  <start-page name="displayGuess" view-id="/numberGuess.jspx">                        
    <redirect/>
    <transition name="guess" to="evaluateGuess">                                      
      <action expression="#{numberGuess.guess}"/>                                     
    </transition>
    <transition name="giveup" to="giveup"/>
    <transition name="cheat" to="cheat"/>
  </start-page>
  
  <decision name="evaluateGuess" expression="#{numberGuess.correctGuess}">            
    <transition name="true" to="win"/>
    <transition name="false" to="evaluateRemainingGuesses"/>
  </decision>
  
  <decision name="evaluateRemainingGuesses" expression="#{numberGuess.lastGuess}">
    <transition name="true" to="lose"/>
    <transition name="false" to="displayGuess"/>
  </decision>
  
  <page name="giveup" view-id="/giveup.jspx">
    <redirect/>
    <transition name="yes" to="lose"/>
    <transition name="no" to="displayGuess"/>
  </page>
  
  <process-state name="cheat">
    <sub-process name="cheat"/>
    <transition to="displayGuess"/>
  </process-state>
  
  <page name="win" view-id="/win.jspx">
    <redirect/>
    <end-conversation/>
  </page>
  
  <page name="lose" view-id="/lose.jspx">
    <redirect/>
    <end-conversation/>
  </page>
  
</pageflow-definition>

@Name("numberGuess")
@Scope(ScopeType.CONVERSATION)
public class NumberGuess implements Serializable {
   
   private int randomNumber;
   private Integer currentGuess;
   private int biggest;
   private int smallest;
   private int guessCount;
   private int maxGuesses;
   private boolean cheated;
   
   @Create                                                   
   public void begin()
   {
      randomNumber = new Random().nextInt(100);
      guessCount = 0;
      biggest = 100;
      smallest = 1;
   }
   
   public void setCurrentGuess(Integer guess)
   {
      this.currentGuess = guess;
   }
   
   public Integer getCurrentGuess()
   {
      return currentGuess;
   }
   
   public void guess()
   {
      if (currentGuess>randomNumber)
      {
         biggest = currentGuess - 1;
      }
      if (currentGuess<randomNumber)
      {
         smallest = currentGuess + 1;
      }
      guessCount ++;
   }
   
   public boolean isCorrectGuess()
   {
      return currentGuess==randomNumber;
   }
   
   public int getBiggest()
   {
      return biggest;
   }
   
   public int getSmallest()
   {
      return smallest;
   }
   
   public int getGuessCount()
   {
      return guessCount;
   }
   
   public boolean isLastGuess()
   {
      return guessCount==maxGuesses;
   }

   public int getRemainingGuesses() {
      return maxGuesses-guessCount;
   }

   public void setMaxGuesses(int maxGuesses) {
      this.maxGuesses = maxGuesses;
   }

   public int getMaxGuesses() {
      return maxGuesses;
   }

   public int getRandomNumber() {
      return randomNumber;
   }

   public void cheated()
   {
      cheated = true;
   }
   
   public boolean isCheat() {
      return cheated;
   }
   
   public List<Integer> getPossibilities()
   {
      List<Integer> result = new ArrayList<Integer>();
      for(int i=smallest; i<=biggest; i++) result.add(i);
      return result;
   }
   
}

@Name("numberGuess")
@Scope(ScopeType.CONVERSATION)
public class NumberGuess implements Serializable {
   
   private int randomNumber;
   private Integer currentGuess;
   private int biggest;
   private int smallest;
   private int guessCount;
   private int maxGuesses;
   private boolean cheated;
   
   @Create                                                   
   public void begin()
   {
      randomNumber = new Random().nextInt(100);
      guessCount = 0;
      biggest = 100;
      smallest = 1;
   }
   
   public void setCurrentGuess(Integer guess)
   {
      this.currentGuess = guess;
   }
   
   public Integer getCurrentGuess()
   {
      return currentGuess;
   }
   
   public void guess()
   {
      if (currentGuess>randomNumber)
      {
         biggest = currentGuess - 1;
      }
      if (currentGuess<randomNumber)
      {
         smallest = currentGuess + 1;
      }
      guessCount ++;
   }
   
   public boolean isCorrectGuess()
   {
      return currentGuess==randomNumber;
   }
   
   public int getBiggest()
   {
      return biggest;
   }
   
   public int getSmallest()
   {
      return smallest;
   }
   
   public int getGuessCount()
   {
      return guessCount;
   }
   
   public boolean isLastGuess()
   {
      return guessCount==maxGuesses;
   }

   public int getRemainingGuesses() {
      return maxGuesses-guessCount;
   }

   public void setMaxGuesses(int maxGuesses) {
      this.maxGuesses = maxGuesses;
   }

   public int getMaxGuesses() {
      return maxGuesses;
   }

   public int getRandomNumber() {
      return randomNumber;
   }

   public void cheated()
   {
      cheated = true;
   }
   
   public boolean isCheat() {
      return cheated;
   }
   
   public List<Integer> getPossibilities()
   {
      List<Integer> result = new ArrayList<Integer>();
      for(int i=smallest; i<=biggest; i++) result.add(i);
      return result;
   }
   
}

@Stateful                                                                                     
@Name("hotelSearch")
@Scope(ScopeType.SESSION)
@Restrict("#{identity.loggedIn}")                                                             
public class HotelSearchingAction implements HotelSearching
{
   
    @PersistenceContext
    private EntityManager em;
   
    private String searchString;
    private int pageSize = 10;
    private int page;
   
    @DataModel                                                                                
    private List<Hotel> hotels;
   
    public void find()
    {
        page = 0;
        queryHotels();
    }
    public void nextPage()
    {
        page++;
        queryHotels();
    }
      
    private void queryHotels()
    {
        hotels = 
            em.createQuery("select h from Hotel h where lower(h.name) like #{pattern} " + 
                           "or lower(h.city) like #{pattern} " + 
                           "or lower(h.zip) like #{pattern} " +
                           "or lower(h.address) like #{pattern}")
              .setMaxResults(pageSize)
              .setFirstResult( page * pageSize )
              .getResultList();
    }
   
    public boolean isNextPageAvailable()
    {
        return hotels!=null && hotels.size()==pageSize;
    }
   
    public int getPageSize() {
        return pageSize;
    }
   
    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }
   
    @Factory(value="pattern", scope=ScopeType.EVENT)
    public String getSearchPattern()
    {
        return searchString==null ? 
            "%" : '%' + searchString.toLowerCase().replace('*', '%') + '%';
    }
   
    public String getSearchString()
    {
        return searchString;
    }
   
    public void setSearchString(String searchString)
    {
        this.searchString = searchString;
    }
   
    @Remove                                                                                   
    public void destroy() {}
}

@Stateful                                                                                     
@Name("hotelSearch")
@Scope(ScopeType.SESSION)
@Restrict("#{identity.loggedIn}")                                                             
public class HotelSearchingAction implements HotelSearching
{
   
    @PersistenceContext
    private EntityManager em;
   
    private String searchString;
    private int pageSize = 10;
    private int page;
   
    @DataModel                                                                                
    private List<Hotel> hotels;
   
    public void find()
    {
        page = 0;
        queryHotels();
    }
    public void nextPage()
    {
        page++;
        queryHotels();
    }
      
    private void queryHotels()
    {
        hotels = 
            em.createQuery("select h from Hotel h where lower(h.name) like #{pattern} " + 
                           "or lower(h.city) like #{pattern} " + 
                           "or lower(h.zip) like #{pattern} " +
                           "or lower(h.address) like #{pattern}")
              .setMaxResults(pageSize)
              .setFirstResult( page * pageSize )
              .getResultList();
    }
   
    public boolean isNextPageAvailable()
    {
        return hotels!=null && hotels.size()==pageSize;
    }
   
    public int getPageSize() {
        return pageSize;
    }
   
    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }
   
    @Factory(value="pattern", scope=ScopeType.EVENT)
    public String getSearchPattern()
    {
        return searchString==null ? 
            "%" : '%' + searchString.toLowerCase().replace('*', '%') + '%';
    }
   
    public String getSearchString()
    {
        return searchString;
    }
   
    public void setSearchString(String searchString)
    {
        this.searchString = searchString;
    }
   
    @Remove                                                                                   
    public void destroy() {}
}

<div class="section">
  
  <span class="errors">
    <h:messages globalOnly="true"/>
  </span>
  
  <h1>Search Hotels</h1>

  <h:form id="searchCriteria">
    <fieldset> 
      <h:inputText id="searchString" value="#{hotelSearch.searchString}" 
                   style="width: 165px;">
        <a:support event="onkeyup" actionListener="#{hotelSearch.find}"                     
                   reRender="searchResults" />
      </h:inputText>
      &#160;
      <a:commandButton id="findHotels" value="Find Hotels" action="#{hotelSearch.find}" 
                       reRender="searchResults"/>
      &#160;
      <a:status>                                                                            
        <f:facet name="start">
          <h:graphicImage value="/img/spinner.gif"/>
        </f:facet>
      </a:status>
      <br/>
      <h:outputLabel for="pageSize">Maximum results:</h:outputLabel>&#160;
      <h:selectOneMenu value="#{hotelSearch.pageSize}" id="pageSize">
        <f:selectItem itemLabel="5" itemValue="5"/>
        <f:selectItem itemLabel="10" itemValue="10"/>
        <f:selectItem itemLabel="20" itemValue="20"/>
      </h:selectOneMenu>
    </fieldset>
  </h:form>
  
</div>

<a:outputPanel id="searchResults">                                                          
  <div class="section">
    <h:outputText value="No Hotels Found"
                  rendered="#{hotels != null and hotels.rowCount==0}"/>
    <h:dataTable id="hotels" value="#{hotels}" var="hot" 
                 rendered="#{hotels.rowCount>0}">
      <h:column>
        <f:facet name="header">Name</f:facet>
        #{hot.name}
      </h:column>
      <h:column>
        <f:facet name="header">Address</f:facet>
        #{hot.address}
      </h:column>
      <h:column>
        <f:facet name="header">City, State</f:facet>
        #{hot.city}, #{hot.state}, #{hot.country}
      </h:column> 
      <h:column>
        <f:facet name="header">Zip</f:facet>
        #{hot.zip}
      </h:column>
      <h:column>
        <f:facet name="header">Action</f:facet>
        <s:link id="viewHotel" value="View Hotel"                                           
                action="#{hotelBooking.selectHotel(hot)}"/>
      </h:column>
    </h:dataTable>
    <s:link value="More results" action="#{hotelSearch.nextPage}" 
            rendered="#{hotelSearch.nextPageAvailable}"/>
  </div>
</a:outputPanel>

<div class="section">
  
  <span class="errors">
    <h:messages globalOnly="true"/>
  </span>
  
  <h1>Search Hotels</h1>

  <h:form id="searchCriteria">
    <fieldset> 
      <h:inputText id="searchString" value="#{hotelSearch.searchString}" 
                   style="width: 165px;">
        <a:support event="onkeyup" actionListener="#{hotelSearch.find}"                     
                   reRender="searchResults" />
      </h:inputText>
      &#160;
      <a:commandButton id="findHotels" value="Find Hotels" action="#{hotelSearch.find}" 
                       reRender="searchResults"/>
      &#160;
      <a:status>                                                                            
        <f:facet name="start">
          <h:graphicImage value="/img/spinner.gif"/>
        </f:facet>
      </a:status>
      <br/>
      <h:outputLabel for="pageSize">Maximum results:</h:outputLabel>&#160;
      <h:selectOneMenu value="#{hotelSearch.pageSize}" id="pageSize">
        <f:selectItem itemLabel="5" itemValue="5"/>
        <f:selectItem itemLabel="10" itemValue="10"/>
        <f:selectItem itemLabel="20" itemValue="20"/>
      </h:selectOneMenu>
    </fieldset>
  </h:form>
  
</div>

<a:outputPanel id="searchResults">                                                          
  <div class="section">
    <h:outputText value="No Hotels Found"
                  rendered="#{hotels != null and hotels.rowCount==0}"/>
    <h:dataTable id="hotels" value="#{hotels}" var="hot" 
                 rendered="#{hotels.rowCount>0}">
      <h:column>
        <f:facet name="header">Name</f:facet>
        #{hot.name}
      </h:column>
      <h:column>
        <f:facet name="header">Address</f:facet>
        #{hot.address}
      </h:column>
      <h:column>
        <f:facet name="header">City, State</f:facet>
        #{hot.city}, #{hot.state}, #{hot.country}
      </h:column> 
      <h:column>
        <f:facet name="header">Zip</f:facet>
        #{hot.zip}
      </h:column>
      <h:column>
        <f:facet name="header">Action</f:facet>
        <s:link id="viewHotel" value="View Hotel"                                           
                action="#{hotelBooking.selectHotel(hot)}"/>
      </h:column>
    </h:dataTable>
    <s:link value="More results" action="#{hotelSearch.nextPage}" 
            rendered="#{hotelSearch.nextPageAvailable}"/>
  </div>
</a:outputPanel>

@Stateful
@Name("hotelBooking")
@Restrict("#{identity.loggedIn}")
public class HotelBookingAction implements HotelBooking
{
   
    @PersistenceContext(type=EXTENDED)                                                
    private EntityManager em;
   
    @In 
        private User user;
   
    @In(required=false) @Out
    private Hotel hotel;
   
    @In(required=false) 
    @Out(required=false)                                                              
    private Booking booking;
     
    @In
    private FacesMessages facesMessages;
      
    @In
    private Events events;
   
    @Logger 
        private Log log;
   
    private boolean bookingValid;
   
    @Begin                                                                            
    public void selectHotel(Hotel selectedHotel)
    {
        hotel = em.merge(selectedHotel);
    }
   
    public void bookHotel()
    {      
        booking = new Booking(hotel, user);
        Calendar calendar = Calendar.getInstance();
        booking.setCheckinDate( calendar.getTime() );
        calendar.add(Calendar.DAY_OF_MONTH, 1);
        booking.setCheckoutDate( calendar.getTime() );
    }
   
    public void setBookingDetails()
    {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.DAY_OF_MONTH, -1);
        if ( booking.getCheckinDate().before( calendar.getTime() ) )
            {
                facesMessages.addToControl("checkinDate", 
                                           "Check in date must be a future date");
                bookingValid=false;
            }
        else if ( !booking.getCheckinDate().before( booking.getCheckoutDate() ) )
            {
                facesMessages.addToControl("checkoutDate", 
                                           "Check out date must be later " + 
                                           "than check in date");
                bookingValid=false;
            }
        else
            {
                bookingValid=true;
            }
    }
   
    public boolean isBookingValid()
    {
        return bookingValid;
    }
   
    @End                                                                              
    public void confirm()
    {
        em.persist(booking);
        facesMessages.add("Thank you, #{user.name}, your confimation number " + 
                          " for #{hotel.name} is #{booki g.id}");
        log.info("New booking: #{booking.id} for #{user.username}");
        events.raiseTransactionSuccessEvent("bookingConfirmed");
    }
   
    @End
    public void cancel() {}
   
    @Remove                                                                           
    public void destroy() {}
}

@Stateful
@Name("hotelBooking")
@Restrict("#{identity.loggedIn}")
public class HotelBookingAction implements HotelBooking
{
   
    @PersistenceContext(type=EXTENDED)                                                
    private EntityManager em;
   
    @In 
        private User user;
   
    @In(required=false) @Out
    private Hotel hotel;
   
    @In(required=false) 
    @Out(required=false)                                                              
    private Booking booking;
     
    @In
    private FacesMessages facesMessages;
      
    @In
    private Events events;
   
    @Logger 
        private Log log;
   
    private boolean bookingValid;
   
    @Begin                                                                            
    public void selectHotel(Hotel selectedHotel)
    {
        hotel = em.merge(selectedHotel);
    }
   
    public void bookHotel()
    {      
        booking = new Booking(hotel, user);
        Calendar calendar = Calendar.getInstance();
        booking.setCheckinDate( calendar.getTime() );
        calendar.add(Calendar.DAY_OF_MONTH, 1);
        booking.setCheckoutDate( calendar.getTime() );
    }
   
    public void setBookingDetails()
    {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.DAY_OF_MONTH, -1);
        if ( booking.getCheckinDate().before( calendar.getTime() ) )
            {
                facesMessages.addToControl("checkinDate", 
                                           "Check in date must be a future date");
                bookingValid=false;
            }
        else if ( !booking.getCheckinDate().before( booking.getCheckoutDate() ) )
            {
                facesMessages.addToControl("checkoutDate", 
                                           "Check out date must be later " + 
                                           "than check in date");
                bookingValid=false;
            }
        else
            {
                bookingValid=true;
            }
    }
   
    public boolean isBookingValid()
    {
        return bookingValid;
    }
   
    @End                                                                              
    public void confirm()
    {
        em.persist(booking);
        facesMessages.add("Thank you, #{user.name}, your confimation number " + 
                          " for #{hotel.name} is #{booki g.id}");
        log.info("New booking: #{booking.id} for #{user.username}");
        events.raiseTransactionSuccessEvent("bookingConfirmed");
    }
   
    @End
    public void cancel() {}
   
    @Remove                                                                           
    public void destroy() {}
}

@Stateful
@Name("roomPreference")
@Restrict("#{identity.loggedIn}")
public class RoomPreferenceAction implements RoomPreference 
{

    @Logger 
        private Log log;

    @In private Hotel hotel;                                                                  
   
    @In private Booking booking;

    @DataModel(value="availableRooms")
    private List<Room> availableRooms;

    @DataModelSelection(value="availableRooms")
    private Room roomSelection;
    
    @In(required=false, value="roomSelection")
    @Out(required=false, value="roomSelection")
    private Room room;

    @Factory("availableRooms")
    public void loadAvailableRooms()
    {
        availableRooms = hotel.getAvailableRooms(booking.getCheckinDate(), 
                                                 booking.getCheckoutDate());
        log.info("Retrieved #0 available rooms", availableRooms.size());
    }

    public BigDecimal getExpectedPrice()
    {
        log.info("Retrieving price for room #0", roomSelection.getName());
      
        return booking.getTotal(roomSelection);
    }

    @Begin(nested=true)                                                                       
    public String selectPreference()
    {
        log.info("Room selected");
      
        this.room = this.roomSelection;                                                       
      
        return "payment";
    }

    public String requestConfirmation()
    {
        // all validations are performed through the s:validateAll, so checks are
        // already performed
        log.info("Request confirmation from user");
      
        return "confirm";
    }

    @End(beforeRedirect=true)                                                                 
    public String cancel()
    {
        log.info("ending conversation");

        return "cancel";
    }

    @Destroy @Remove                                                                      
        public void destroy() {}    
}

@Stateful
@Name("roomPreference")
@Restrict("#{identity.loggedIn}")
public class RoomPreferenceAction implements RoomPreference 
{

    @Logger 
        private Log log;

    @In private Hotel hotel;                                                                  
   
    @In private Booking booking;

    @DataModel(value="availableRooms")
    private List<Room> availableRooms;

    @DataModelSelection(value="availableRooms")
    private Room roomSelection;
    
    @In(required=false, value="roomSelection")
    @Out(required=false, value="roomSelection")
    private Room room;

    @Factory("availableRooms")
    public void loadAvailableRooms()
    {
        availableRooms = hotel.getAvailableRooms(booking.getCheckinDate(), 
                                                 booking.getCheckoutDate());
        log.info("Retrieved #0 available rooms", availableRooms.size());
    }

    public BigDecimal getExpectedPrice()
    {
        log.info("Retrieving price for room #0", roomSelection.getName());
      
        return booking.getTotal(roomSelection);
    }

    @Begin(nested=true)                                                                       
    public String selectPreference()
    {
        log.info("Room selected");
      
        this.room = this.roomSelection;                                                       
      
        return "payment";
    }

    public String requestConfirmation()
    {
        // all validations are performed through the s:validateAll, so checks are
        // already performed
        log.info("Request confirmation from user");
      
        return "confirm";
    }

    @End(beforeRedirect=true)                                                                 
    public String cancel()
    {
        log.info("ending conversation");

        return "cancel";
    }

    @Destroy @Remove                                                                      
        public void destroy() {}    
}

<div class="section">
  <h1>Room Preference</h1>
</div>

<div class="section">
  <h:form id="room_selections_form">
    <div class="section">
      <h:outputText styleClass="output" 
         value="No rooms available for the dates selected: " 
         rendered="#{availableRooms != null and availableRooms.rowCount == 0}"/>
      <h:outputText styleClass="output" 
         value="Rooms available for the dates selected: " 
         rendered="#{availableRooms != null and availableRooms.rowCount > 0}"/>
      
      <h:outputText styleClass="output" value="#{booking.checkinDate}"/>
      <h:outputText styleClass="output" value="#{booking.checkoutDate}"/>
      
      <br/><br/>
      
      <h:dataTable value="#{availableRooms}" var="room"                             
         rendered="#{availableRooms.rowCount > 0}">
        <h:column>
          <f:facet name="header">Name</f:facet>
          #{room.name}
        </h:column>
        <h:column>
          <f:facet name="header">Description</f:facet>
          #{room.description}
        </h:column>
        <h:column>
          <f:facet name="header">Per Night</f:facet>
          <h:outputText value="#{room.price}">
            <f:convertNumber type="currency" currencySymbol="$"/>
          </h:outputText>
        </h:column>
        <h:column>
          <f:facet name="header">Action</f:facet>
          <h:commandLink id="selectRoomPreference" 
            action="#{roomPreference.selectPreference}">Select</h:commandLink>      
        </h:column>
      </h:dataTable>   
    </div>
    <div class="entry">
      <div class="label">&#160;</div>
      <div class="input">
        <s:button id="cancel" value="Revise Dates" view="/book.xhtml"/>             
      </div>
    </div>    
  </h:form>
</div>

<div class="section">
  <h1>Room Preference</h1>
</div>

<div class="section">
  <h:form id="room_selections_form">
    <div class="section">
      <h:outputText styleClass="output" 
         value="No rooms available for the dates selected: " 
         rendered="#{availableRooms != null and availableRooms.rowCount == 0}"/>
      <h:outputText styleClass="output" 
         value="Rooms available for the dates selected: " 
         rendered="#{availableRooms != null and availableRooms.rowCount > 0}"/>
      
      <h:outputText styleClass="output" value="#{booking.checkinDate}"/>
      <h:outputText styleClass="output" value="#{booking.checkoutDate}"/>
      
      <br/><br/>
      
      <h:dataTable value="#{availableRooms}" var="room"                             
         rendered="#{availableRooms.rowCount > 0}">
        <h:column>
          <f:facet name="header">Name</f:facet>
          #{room.name}
        </h:column>
        <h:column>
          <f:facet name="header">Description</f:facet>
          #{room.description}
        </h:column>
        <h:column>
          <f:facet name="header">Per Night</f:facet>
          <h:outputText value="#{room.price}">
            <f:convertNumber type="currency" currencySymbol="$"/>
          </h:outputText>
        </h:column>
        <h:column>
          <f:facet name="header">Action</f:facet>
          <h:commandLink id="selectRoomPreference" 
            action="#{roomPreference.selectPreference}">Select</h:commandLink>      
        </h:column>
      </h:dataTable>   
    </div>
    <div class="entry">
      <div class="label">&#160;</div>
      <div class="input">
        <s:button id="cancel" value="Revise Dates" view="/book.xhtml"/>             
      </div>
    </div>    
  </h:form>
</div>

@Stateful
@Name("hotelBooking")
@Restrict("#{identity.loggedIn}")
public class HotelBookingAction implements HotelBooking
{
   
   @PersistenceContext(type=EXTENDED)
   private EntityManager em;
   
   @In 
   private User user;
   
   @In(required=false) @Out
   private Hotel hotel;
   
   @In(required=false) 
   @Out(required=false)
   private Booking booking;
   
   @In(required=false)
   private Room roomSelection;
   
   @In
   private FacesMessages facesMessages;
      
   @In
   private Events events;
   
   @Logger 
   private Log log;
   
   @Begin
   public void selectHotel(Hotel selectedHotel)
   {
      log.info("Selected hotel #0", selectedHotel.getName());
      hotel = em.merge(selectedHotel);
   }
   
   public String setBookingDates()
   {
      // the result will indicate whether or not to begin the nested conversation
      // as well as the navigation.  if a null result is returned, the nested
      // conversation will not begin, and the user will be returned to the current
      // page to fix validation issues
      String result = null;

      Calendar calendar = Calendar.getInstance();
      calendar.add(Calendar.DAY_OF_MONTH, -1);

      // validate what we have received from the user so far
      if ( booking.getCheckinDate().before( calendar.getTime() ) )
      {
         facesMessages.addToControl("checkinDate", 
                                    "Check in date must be a future date");
      }
      else if ( !booking.getCheckinDate().before( booking.getCheckoutDate() ) )
      {
         facesMessages.addToControl("checkoutDate", 
                                    "Check out date must be later than check in date");
      }
      else
      {
         result = "rooms";
      }

      return result;
   }
   
   public void bookHotel()
   {      
      booking = new Booking(hotel, user);
      Calendar calendar = Calendar.getInstance();
      booking.setCheckinDate( calendar.getTime() );
      calendar.add(Calendar.DAY_OF_MONTH, 1);
      booking.setCheckoutDate( calendar.getTime() );
   }
   
   @End(root=true)                                                                          
   public void confirm()
   {
      // on confirmation we set the room preference in the booking.  the room preference
      // will be injected based on the nested conversation we are in.
      booking.setRoomPreference(roomSelection);                                             

      em.persist(booking);
      facesMessages.add("Thank you, #{user.name}, your confimation number" +
                        " for #{hotel.name} is #{booking.id}");
      log.info("New booking: #{booking.id} for #{user.username}");
      events.raiseTransactionSuccessEvent("bookingConfirmed");
   }
   
   @End(root=true, beforeRedirect=true)                                                     
   public void cancel() {}
   
   @Destroy @Remove
   public void destroy() {}
}

@Stateful
@Name("hotelBooking")
@Restrict("#{identity.loggedIn}")
public class HotelBookingAction implements HotelBooking
{
   
   @PersistenceContext(type=EXTENDED)
   private EntityManager em;
   
   @In 
   private User user;
   
   @In(required=false) @Out
   private Hotel hotel;
   
   @In(required=false) 
   @Out(required=false)
   private Booking booking;
   
   @In(required=false)
   private Room roomSelection;
   
   @In
   private FacesMessages facesMessages;
      
   @In
   private Events events;
   
   @Logger 
   private Log log;
   
   @Begin
   public void selectHotel(Hotel selectedHotel)
   {
      log.info("Selected hotel #0", selectedHotel.getName());
      hotel = em.merge(selectedHotel);
   }
   
   public String setBookingDates()
   {
      // the result will indicate whether or not to begin the nested conversation
      // as well as the navigation.  if a null result is returned, the nested
      // conversation will not begin, and the user will be returned to the current
      // page to fix validation issues
      String result = null;

      Calendar calendar = Calendar.getInstance();
      calendar.add(Calendar.DAY_OF_MONTH, -1);

      // validate what we have received from the user so far
      if ( booking.getCheckinDate().before( calendar.getTime() ) )
      {
         facesMessages.addToControl("checkinDate", 
                                    "Check in date must be a future date");
      }
      else if ( !booking.getCheckinDate().before( booking.getCheckoutDate() ) )
      {
         facesMessages.addToControl("checkoutDate", 
                                    "Check out date must be later than check in date");
      }
      else
      {
         result = "rooms";
      }

      return result;
   }
   
   public void bookHotel()
   {      
      booking = new Booking(hotel, user);
      Calendar calendar = Calendar.getInstance();
      booking.setCheckinDate( calendar.getTime() );
      calendar.add(Calendar.DAY_OF_MONTH, 1);
      booking.setCheckoutDate( calendar.getTime() );
   }
   
   @End(root=true)                                                                          
   public void confirm()
   {
      // on confirmation we set the room preference in the booking.  the room preference
      // will be injected based on the nested conversation we are in.
      booking.setRoomPreference(roomSelection);                                             

      em.persist(booking);
      facesMessages.add("Thank you, #{user.name}, your confimation number" +
                        " for #{hotel.name} is #{booking.id}");
      log.info("New booking: #{booking.id} for #{user.username}");
      events.raiseTransactionSuccessEvent("bookingConfirmed");
   }
   
   @End(root=true, beforeRedirect=true)                                                     
   public void cancel() {}
   
   @Destroy @Remove
   public void destroy() {}
}

 @Name("blog")
@Scope(ScopeType.STATELESS)
@AutoCreate
public class BlogService 
{
   @In EntityManager entityManager;                                                                             

   @Unwrap                                                                                                      
   public Blog getBlog()
   {
      return (Blog) entityManager.createQuery("select distinct b from Blog b left join fetch b.blogEntries")
         .setHint("org.hibernate.cacheable", true)
         .getSingleResult();
   }
}

 @Name("blog")
@Scope(ScopeType.STATELESS)
@AutoCreate
public class BlogService 
{
   @In EntityManager entityManager;                                                                             

   @Unwrap                                                                                                      
   public Blog getBlog()
   {
      return (Blog) entityManager.createQuery("select distinct b from Blog b left join fetch b.blogEntries")
         .setHint("org.hibernate.cacheable", true)
         .getSingleResult();
   }
}