A hybrid Android and IOS Mobile Chat app

Project : 
Development of a simple extensible chat 

Technologies and Frameworks
Oracle Mobile Application Framework (MAF)
Oracle Java
RESTful JSON (jersey json)

IDE
Oracle Jdeveloper (still the best Java IDE)

Container
Weblogic (Development and Testing)
TomEE (Production)


Introduction
In one of our organization meeting we decided to embed simple chat module in all our apps developments including IOS, Android and Windows.

For Java lovers oracle MAF have proven to be a complete, stable framework and tools to develop cross platform enterprise mobile application. Its apparently easy to learn without much complications or difficult learning curves. With Oracle MAF you have lots of options to choose from to build a chat system as whatsapp or facebook in days. This is a very basic chat with very few lines of code as shown below. 



Basic Chat

Development

1. Create the ChatSend() action.

package com.softworks.mobile.mola.beans;

import com.softworks.mobile.mola.model.ChatBot;
import com.softworks.mobile.mola.model.UserRegistration;
import com.softworks.mobile.mola.service.HelperClass;
import com.softworks.mobile.mola.service.MolaRestService;
import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import oracle.adfmf.bindings.iterator.BasicIterator;
import oracle.adfmf.framework.api.AdfmfJavaUtilities;
import oracle.adfmf.java.beans.PropertyChangeListener;
import oracle.adfmf.java.beans.PropertyChangeSupport;
import oracle.maf.api.dc.ws.rest.RestServiceAdapter;

public class ChatBotBean implements Serializable, Runnable {
    @SuppressWarnings("compatibility:-5925689949074430979")
    private static final long serialVersionUID = 1L;
    private String chatsendtext, _chatsendtext;
    private List chatreadlist, chatServList, chatServSummaryList;
    UserRegistration ur = new UserRegistration();
    private PropertyChangeSupport _propertyChangeSupport = new PropertyChangeSupport(this);
    ChatBot cbot = new ChatBot();
    private int chatInit = 0;
    private String chatdate;
    private String currentToken;

    public ChatBotBean() {
        super();
        chatServList = new ArrayList<>();
        chatServSummaryList = new ArrayList<>();
        currentToken = HelperClass.ReadFromJson("deviceToken");
    }

    public void ChatSend() throws InterruptedException {

        if (chatsendtext != null) {
            cbot.setChatDateTime(new SimpleDateFormat("h:mm a").format(new Date()));
            _chatsendtext = chatsendtext;
            setChatsendtext(null);
            chatServList.add(new ChatBot(_chatsendtext, "sent", cbot.getChatDateTime(),
                                         HelperClass.ReadFromJson("username"), cbot.getReceiverUsername()));
            AdfmfJavaUtilities.setELValue("#{applicationScope.chatreadlist}", chatServList);

            Thread s = new Thread(this);

            s.start();       
       }
    }
    private void ChatBotSend() {
        //For each send compare the current device id to the received one to decide what address to send...


        if (chatInit == 0) {
            cbot.setDeviceToken(cbot.getReceiverToken());
           
        }
        if (chatInit == 1 & AdfmfJavaUtilities.getELValue("#{applicationScope.senderTk}") == null) {
            cbot.setDeviceToken(cbot.getReceiverToken());
            
        }

        if (AdfmfJavaUtilities.getELValue("#{applicationScope.senderTk}") != null) {
            if (currentToken.equalsIgnoreCase((String) AdfmfJavaUtilities.getELValue("#{applicationScope.senderTk}"))) { //I am the once sending
                cbot.setDeviceToken(cbot.getReceiverToken());
                
            }
            if (!currentToken.equalsIgnoreCase((String) AdfmfJavaUtilities.getELValue("#{applicationScope.senderTk}"))) {
                cbot.setDeviceToken(cbot.getSenderToken());
                
            }

        }
        chatInit = 1;
  
        try {
            //Users must be signed in to obtained the listing below.
            //cbot.setSenderToken(HelperClass.ReadFromJson("deviceToken"));
            cbot.setUsername(HelperClass.ReadFromJson("username"));
            cbot.setFirstname(HelperClass.ReadFromJson("firstname"));
            cbot.setLastname(HelperClass.ReadFromJson("lastname"));
            cbot.setMessagetext(_chatsendtext);
            cbot.setMessagedate(new Date());
        } catch (NullPointerException npe) {

        }


        String queryString = "cbot";
        String response = MolaRestService.invokeRestService(RestServiceAdapter.REQUEST_TYPE_PUT, queryString, cbot);
        String pushMessage = (String) AdfmfJavaUtilities.getELValue("#{applicationScope.pushMessage}");
        if (response.equalsIgnoreCase("success") & pushMessage != "") {
            if (AdfmfJavaUtilities.getELValue("#{applicationScope.pushMessage}") != null) {
                chatServList.add(new ChatBot((String) AdfmfJavaUtilities.getELValue("#{applicationScope.pushMessage}"),
                                             "received", cbot.getChatDateTime(), cbot.getUsername(),
                                             cbot.getReceiverUsername()));
                AdfmfJavaUtilities.setELValue("#{applicationScope.chatreadlist}", chatServList);
                
            }

        }

    }

    public String InitializeSending() {
        BasicIterator urIterator =
            (BasicIterator) AdfmfJavaUtilities.getELValue("#{bindings.userinformationIterator.iterator}");
        ur = (UserRegistration) urIterator.getDataProvider();
        cbot.setReceiverSurname(ur.getDreg().getSurname());
        cbot.setReceiverFirstname(ur.getDreg().getFirstname());
        cbot.setStateId(ur.getState_id());
        cbot.setUsername(HelperClass.ReadFromJson("username"));
        cbot.setReceiverUsername(ur.getDreg().getRegId());

        //Open communication channel between 2 nodes using address tokens
        cbot.setReceiverToken(ur.getDreg().getDevicetoken());
        cbot.setSenderToken(HelperClass.ReadFromJson("deviceToken"));


        try {
            List _chatHistorySize = new ArrayList<>();

            List _chatHistory =
                (List) AdfmfJavaUtilities.getELValue("#{applicationScope.chatreadlist}");

            AdfmfJavaUtilities.setELValue("#{applicationScope.chatreadlist}", null);


            if (_chatHistory.size() > 0) { //existing chat
                chatInit = 1;


                for (ChatBot cb : _chatHistory) {
                    try {

                        if (cbot.getReceiverUsername().equalsIgnoreCase(cb.getReceiverUsername())) {
                            _chatHistorySize.add(cb);

                        }

                    } catch (NullPointerException npe) {

                        continue;
                    }

                }


                AdfmfJavaUtilities.setELValue("#{applicationScope.chatreadlist}", _chatHistorySize);


            }
        } catch (NullPointerException npe) {


        }

        return "ChatBotFC";
    }


    @Override
    public void run() {
        try {
            Thread.sleep(2000);
            ChatBotSend();
        } catch (InterruptedException e) {
        }

    }

    //setters and getters


    public void setChatdate(String chatdate) {
        this.chatdate = chatdate;
    }

    public String getChatdate() {
        return chatdate;
    }

    public void setChatsendtext(String chatsendtext) {
        String oldChatsendtext = this.chatsendtext;
        this.chatsendtext = chatsendtext;
        _propertyChangeSupport.firePropertyChange("chatsendtext", oldChatsendtext, chatsendtext);
    }

    public String getChatsendtext() {
        return chatsendtext;
    }


    public void setCbot(ChatBot cbot) {
        ChatBot oldCbot = this.cbot;
        this.cbot = cbot;
        _propertyChangeSupport.firePropertyChange("cbot", oldCbot, cbot);
    }

    public ChatBot getCbot() {
        return cbot;
    }

    public void setChatServList(List chatServList) {
        List oldChatServList = this.chatServList;
        this.chatServList = chatServList;
        _propertyChangeSupport.firePropertyChange("chatServList", oldChatServList, chatServList);
    }

    public List getChatServList() {
        return chatServList;
    }

    public void addPropertyChangeListener(PropertyChangeListener l) {
        _propertyChangeSupport.addPropertyChangeListener(l);
    }

    public void removePropertyChangeListener(PropertyChangeListener l) {
        _propertyChangeSupport.removePropertyChangeListener(l);
    }
}

2. Invoke REST Service

      public static String invokeRestService(String requestType, String requestURI, Object postData) {
      
        RestServiceAdapterFactory factory = RestServiceAdapterFactory.newFactory();
        RestServiceAdapter rs = factory.createRestServiceAdapter();
        rs.clearRequestProperties();
        rs.setConnectionName("MolaRESTService");
        rs.addRequestProperty("Content-Type", "application/json");
        rs.addRequestProperty("Accept", "application/json;charset=UTF-8");
        rs.setRequestMethod(requestType);
        rs.setRequestURI(requestURI);
        rs.setRetryLimit(0);
        rs.addRequestProperty("Authorization", "Basic "+HelperClass.TomcatAuthorization());
        
      String response = "";
      String postDataStr = "";

      try {
        if (postData != null) {
          JSONObject jsonObj = (JSONObject) JSONBeanSerializationHelper.toJSON(postData);
        postDataStr = jsonObj.toString();
        }

        response = rs.send(postDataStr);

      } catch (AdfInvocationException ex) {
        if (AdfInvocationException.CATEGORY_WEBSERVICE.compareTo(ex.getErrorCategory()) == 0) {
          throw new RuntimeException("Error with the server. Please try later.");
        }
      } catch (Exception e) {
       // throw new AdfException(e.getLocalizedMessage(), AdfException.ERROR);
        e.printStackTrace();
      }

      return response;
    }

3. Message is received from the server and received on the app through the onMessage

    public void onMessage(Event event) {
        String servermsg = event.getPayload();
        

        HashMap payload = null;
        String pushMsg = "No message received";
        String pushDeviceType="os";
        String senderId ="damilola";
        String senderTk ="xx";
        String receiverTk ="nn";
        try
        {
          payload = (HashMap)JSONBeanSerializationHelper.fromJSON(HashMap.class, msg);
          pushMsg = (String)payload.get("alert");
          pushDeviceType = (String)payload.get("deviceToken");
          senderId = (String)payload.get("senderId");
          senderTk = (String)payload.get("senderTk");
          receiverTk = (String)payload.get("receiverTk");
         
            // Write the push message to app scope to display to the user        
            AdfmfJavaUtilities.setELValue("#{applicationScope.pushMessage}", pushMsg);
            AdfmfJavaUtilities.setELValue("#{applicationScope.pushDeviceType}", pushDeviceType);
            AdfmfJavaUtilities.setELValue("#{applicationScope.senderId}", senderId);
            AdfmfJavaUtilities.setELValue("#{applicationScope.senderTk}", senderTk);
            AdfmfJavaUtilities.setELValue("#{applicationScope.receiverTk}", receiverTk);
            
            
        }
        catch(Exception e) {
            e.printStackTrace();
        }
       
    }

4. ChatBot Entity

public class ChatBot {
    private String deviceToken;
    private String messagetext;
    private Date messagedate;
    private String deviceid = DeviceManagerFactory.getDeviceManager().getOs().toLowerCase();
    private String username;
    private String lastname;
    private String firstname;
    private String messagestatus;
    private String senderToken;
    private String receiverToken;
    private String receiverSurname;
    private String receiverFirstname;
    private String receiverUsername;
    private String jobId;
    private String stateId;
    private String chatDateTime;
    private PropertyChangeSupport _propertyChangeSupport = new PropertyChangeSupport(this);
 
    public ChatBot() {
        super();
    }
    
    public ChatBot(String messagetext) {
        this.messagetext = messagetext;
    }
    public ChatBot(String messagetext,String messagestatus,String chatDateTime,String username,String receiverUsername) {
        this.messagetext = messagetext;
        this.messagestatus = messagestatus;
        this.chatDateTime =chatDateTime;
        this.username = username;
        this.receiverUsername = receiverUsername;
    }

    public void setDeviceToken(String deviceToken) {
        this.deviceToken = deviceToken;
    }

    public String getDeviceToken() {
        return deviceToken;
    }

    public void setMessagetext(String messagetext) {
        this.messagetext = messagetext;
    }

    public String getMessagetext() {
        return messagetext;
    }

    public void setMessagedate(Date messagedate) {
        this.messagedate = messagedate;
    }

    public Date getMessagedate() {
        return messagedate;
    }

    public void setDeviceid(String deviceid) {
        this.deviceid = deviceid;
    }

    public String getDeviceid() {
        return deviceid;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getUsername() {
        return username;
    }

    public void setLastname(String lastname) {
        this.lastname = lastname;
    }

    public String getLastname() {
        return lastname;
    }

    public void setFirstname(String firstname) {
        this.firstname = firstname;
    }

    public String getFirstname() {
        return firstname;
    }


    


    public void setSenderToken(String senderToken) {
        this.senderToken = senderToken;
    }

    public String getSenderToken() {
        return senderToken;
    }

    public void setReceiverSurname(String receiverSurname) {
        this.receiverSurname = receiverSurname;
    }

    public String getReceiverSurname() {
        return receiverSurname;
    }

    public void setReceiverFirstname(String receiverFirstname) {
        this.receiverFirstname = receiverFirstname;
    }

    public String getReceiverFirstname() {
        return receiverFirstname;
    }

    public void setJobId(String jobId) {
        this.jobId = jobId;
    }

    public String getJobId() {
        return jobId;
    }

    public void setStateId(String stateId) {
        this.stateId = stateId;
    }

    public String getStateId() {
        return stateId;
    }

    public void setChatDateTime(String chatDateTime) {
        this.chatDateTime = chatDateTime;
    }

    public String getChatDateTime() {
        return chatDateTime;
    }


    public void setReceiverToken(String receiverToken) {
        this.receiverToken = receiverToken;
    }

    public String getReceiverToken() {
        return receiverToken;
    }

    public void setReceiverUsername(String receiverUsername) {
        this.receiverUsername = receiverUsername;
    }

    public String getReceiverUsername() {
        return receiverUsername;
    }

    public void setMessagestatus(String messagestatus) {
        String oldMessagestatus = this.messagestatus;
        this.messagestatus = messagestatus;
        _propertyChangeSupport.firePropertyChange("messagestatus", oldMessagestatus, messagestatus);
    }

    public String getMessagestatus() {
        return messagestatus;
    }

    public void addPropertyChangeListener(PropertyChangeListener l) {
        _propertyChangeSupport.addPropertyChangeListener(l);
    }

    public void removePropertyChangeListener(PropertyChangeListener l) {
        _propertyChangeSupport.removePropertyChangeListener(l);
    }
}

5. UI using MAF full javascript/CSS compatible

 
<?xml version="1.0" encoding="UTF-8" ?>
<amx:view xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:amx="http://xmlns.oracle.com/adf/mf/amx"
          xmlns:dvtm="http://xmlns.oracle.com/adf/mf/amx/dvt">
    <amx:systemActionBehavior type="back" id="sab1" action="#{HealthProgramsBean.goDashboard}"/>
    <amx:panelPage id="pp1">
        <amx:facet name="header">
            <amx:outputText value="#{ChatBotBean.cbot.receiverSurname} #{ChatBotBean.cbot.receiverFirstname} - #{ChatBotBean.cbot.stateId}"
                            id="ot1"/>
        </amx:facet>
        <amx:facet name="primary">
            <amx:commandButton id="cb1" action="__back" text="Back"/>
        </amx:facet>
        <amx:facet name="secondary">
            <amx:commandButton id="cb2"/>
        </amx:facet>
        <amx:facet name="footer">
            <amx:panelGroupLayout layout="horizontal" halign="center" inlineStyle="width: 100%">
                <amx:inputText id="it1" value="#{ChatBotBean.chatsendtext}" hintText="Write a message"
                               inlineStyle="word-wrap:break-word;" rows="2"/>
                <amx:commandButton text="Send" action="#{ChatBotBean.ChatSend()}"
                                   styleClass="adfmf-commandButton-small"></amx:commandButton>
            </amx:panelGroupLayout>
        </amx:facet>
        <amx:panelStretchLayout id="psl1" >
            <amx:facet name="top"/>
            <amx:facet name="center">
                <amx:panelStretchLayout id="Tab1" xmlns:amx="http://xmlns.oracle.com/adf/mf/amx">
                    <amx:facet name="center">
                        
                    </amx:facet>
                </amx:panelStretchLayout>
            </amx:facet>
            <amx:facet name="bottom">
                <amx:panelStretchLayout id="psl2" xmlns:amx="http://xmlns.oracle.com/adf/mf/amx" scrollPolicy="scroll"
                                        inlineStyle="overflow:auto;display:flex;flex-direction: column-reverse">
                    <amx:facet name="bottom">
                        <amx:iterator id="i1" value="#{applicationScope.chatreadlist}" var="row">
                            <amx:tableLayout id="tl1" width="100%">
                                <amx:rowLayout id="rl1">
                                    <amx:cellFormat id="cf1"
                                                    rendered="#{row.messagestatus != 'sent'}"
                                                    width="20%">
                                        <amx:outputText id="ot2"
                                                        value="#{applicationScope.badge eq null ? 'DA' : applicationScope.badge}"
                                                        inlineStyle="background-color:grey"
                                                        styleClass="profileNameAvatar"/>
                                    </amx:cellFormat>
                                    <amx:cellFormat id="cf2"  halign="start" width="70%">
                                        
                                            <amx:panelGroupLayout layout="horizontal" valign="bottom" rendered="#{row.messagetext != null}"
                                                    styleClass="#{row.messagestatus == 'sent' ? 'right' : 'left'}" >
                                                <amx:outputText value="#{row.messagetext}" id="ot3" inlineStyle="width:50%;color:#{row.messagestatus == 'sent' ? 'white' : 'black'}"/>
                                                <amx:spacer width="4"/>
                                                <amx:outputText value="#{row.chatDateTime}" 
                                                                inlineStyle="width:20%;font-size:10px;font-style:italic;position:relative"/>
                                                                
                                            <amx:panelGroupLayout halign="end" valign="bottom">
                                                <amx:image rendered="#{row.messagestatus == 'sent'}"
                                                           source="/images/sent.png" inlineStyle="width:15px;height:15px;position:right"/>
                                                <amx:image rendered="#{row.messagestatus == 'delivered'}"
                                                           source="/images/delivered.png"
                                                           inlineStyle="width:15px;height:15px;position:right"/>
                                                <amx:image rendered="#{row.messagestatus == 'read'}"
                                                           source="/images/read.png" inlineStyle="width:15px;height:15px;position:right"/>
                                            </amx:panelGroupLayout>
                                            
                                            </amx:panelGroupLayout>
                                            
                                            
                                        
                                    </amx:cellFormat>
                                </amx:rowLayout>
                            </amx:tableLayout>
                        </amx:iterator>
                    </amx:facet>
                </amx:panelStretchLayout>
            </amx:facet>
        </amx:panelStretchLayout>
    </amx:panelPage>
</amx:view>

6. CSS bubbles for the chat

 
@charset "UTF-8";
/*Start of chat bubble css*/
.right {
  position: relative;
  padding: 10px 20px;
  color: white;
  background: #0B93F6;
  border-radius: 10px;
  float: right;
  max-width: 80%;
    word-wrap: break-word;
    margin-bottom: 20px;
    line-height: 24px;
}
  .right::before {
    content: "";
    position: absolute;
    z-index: -1;
    bottom: -2px;
    right: -7px;
    height: 20px;
    border-right: 20px solid #0B93F6;
    border-bottom-left-radius: 16px 14px;
    -webkit-transform: translate(0, -2px);
  }
  .right::after {
    content: "";
    position: absolute;
    z-index: 1;
    bottom: -2px;
    right: -56px;
    width: 26px;
    height: 20px;
    background: white;
    border-bottom-left-radius: 10px;
    -webkit-transform: translate(-30px, -2px);
  }


.left {
  position: relative;
  padding: 10px 20px;
  background: #E5E5EA;
  border-radius: 10px;
  color: black;
  float: left;
  max-width: 80%;
    word-wrap: break-word;
    margin-bottom: 20px;
    line-height: 24px;
}
  .left::before {
    content: "";
    position: absolute;
    z-index: 2;
    bottom: -2px;
    left: -7px;
    height: 20px;
    border-left: 20px solid #E5E5EA;
    border-bottom-right-radius: 16px 14px;
    -webkit-transform: translate(0, -2px);
  }
  .left::after {
    content: "";
    position: absolute;
    z-index: 3;
    bottom: -2px;
    left: 4px;
    width: 26px;
    height: 20px;
    background: white;
    border-bottom-right-radius: 10px;
    -webkit-transform: translate(-30px, -2px);
  }


@keyframes loud {
  20% {
    transform: rotate3d(0, 0, 1, 5deg) scale3d(1.5, 1.5, 1.5);
  }
  25% {
    transform: rotate3d(0, 0, 1, -5deg) scale3d(1.5, 1.5, 1.5);
  }
  30% {
    transform: rotate3d(0, 0, 1, 5deg) scale3d(1.5, 1.5, 1.5);
  }
  35% {
    transform: rotate3d(0, 0, 1, -5deg) scale3d(1.5, 1.5, 1.5);
  }
  40% {
    transform: rotate3d(0, 0, 1, 5deg) scale3d(1.5, 1.5, 1.5);
  }
  45% {
    transform: rotate3d(0, 0, 1, -5deg) scale3d(1.5, 1.5, 1.5);
  }
  50% {
    transform: rotate3d(0, 0, 1, 5deg) scale3d(1.5, 1.5, 1.5);
  }
  60% {
    transform: rotate3d(0, 0, 1, 5deg) scale3d(1.5, 1.5, 1.5);
  }
  to {
    transform: rotate3d(0, 0, 1, 0deg);
  }
}

.loud {
  animation-duration: 1.5s;
  animation-fill-mode: both;
  animation-timing-function: ease-in-out;
  transform-origin: center center;
  animation-name: loud;
}

@keyframes slam {
  0% {
    transform: rotate3d(0, 0, 1, 5deg) scale3d(3, 3, 3) translate3d(-50px, -10px, 0);
    box-shadow: 0px 0px 0px 0px rgba(0, 0, 0, 0.2);
  }
  18% {
    transform: rotate3d(0, 0, 1, 0deg) scale3d(1, 1, 1) translate3d(0, 0, 0);
    box-shadow: 0px 0px 0px 0px rgba(0, 0, 0, 0.45);
  }
  40% {
    transform: rotate3d(0, 0, 1, 1deg) scale3d(1.1, 1.1, 1.1) translate3d(-1px, -1px, 0);
    box-shadow: 0px 0px 100px 2px rgba(0, 0, 0, 0.25);
  }
  55% {
    transform: rotate3d(0, 0, 1, 0deg) scale3d(1.0, 1.0, 1.0) translate3d(0px, 0px, 0);
  }
  to {
    transform: rotate3d(0, 0, 1, 0deg);
    box-shadow: 0px 0px 125px 5px rgba(0, 0, 0, 0);
  }
}

.slam {
  animation-duration: 1.5s;
  animation-fill-mode: both;
  animation-timing-function: cubic-bezier(.87, .58, .25, 1.29);
  transform-origin: center center;
  animation-name: slam;
}

@keyframes gentle {
  0%,
  50% {
    transform: scale3d(1.5, 1.5, 1.5);
  }
  to {
    transform: rotate3d(0, 0, 1, 0deg);
  }
}

@keyframes gentle-text {
  0%,
  50% {
    transform: scale3d(0.5, 0.5, 0.5);
  }
  to {
    transform: rotate3d(0, 0, 1, 0deg);
  }
}

.gentle {
  animation-duration: 4s;
  animation-fill-mode: both;
  animation-timing-function: ease-out;
  transform-origin: bottom right;
  animation-name: gentle;
}
  p {
    animation-duration: 4s;
    animation-fill-mode: both;
    animation-timing-function: ease-out;
    transform-origin: center center;
    animation-name: gentle-text;
  }
/*End of chat bubble css*/

ServerSide Implementation to receive and forward messages as notifications

7a. Create a PushNotification Server using Jersey JSON Rest Implementation.
    You can deploy this on any of the container mentioned above

 
       @PUT
    @Path("cbot/")
    // @Produces(MediaType.APPLICATION_JSON)
    // @Consumes(MediaType.APPLICATION_JSON)
    public Response ChatBot(ChatBot cb) {
        if(WSPackages.ws_chatbotrelay(cb)) {
             return Response.ok(200)
                           .entity("Success")
                           .build();
      
        }
        else{
            return Response.status(401)
                           .entity("You cant go further..")
                           .build();
        }

    }
    

7b. Method ws_chatbotrelay

 
          protected static final Boolean ws_chatbotrelay(ChatBot chatbot) {
        try {
            final MessagingController mctrl = new MessagingController();

            mctrl.pushChatBotMessage(chatbot);
//You may persist the conversation in the database here
            return true;


        } catch (Exception e) {
            e.printStackTrace();
        }

        return false;

    }

7c. Method pushChatBotMessage

 
             public final void pushChatBotMessage(ChatBot chatbot) {
        try {
            if (chatbot.getDeviceid().equals("android")) {
               pushChatBotAndroid(chatbot);
            } else if("ios".equals(chatbot.getDeviceid())) {
               pushMessageIOS();
            }
        } catch (Exception e) {
            e.printStackTrace();
            FacesMessage fm = new FacesMessage(FacesMessage.SEVERITY_WARN, e.getMessage(), "");
            FacesContext fctx = FacesContext.getCurrentInstance();
            fctx.addMessage(null, fm);
        }
    }
    
    private void pushMessageAndroid(Messaging messaging) throws Exception {
        Sender sender = new Sender(HelperClass.GOOGLE_APIKEY);
        Message message = new Message.Builder()
            .addData("alert", messaging.getMessage())
            .addData("deviceType", "android")
            .addData("deviceTk", messaging.getDeviceToken())
            .addData("sound", "default")
            .addData("featureid", "Login")
            .addData("badge", "1").build();
        System.out.println("Got regId as "+messaging.getDeviceToken() +" and message as "+messaging.getMessage());
        String regId = messaging.getDeviceToken();
        try {
            Result res = sender.send(message, regId, 5);
            String id = res.getMessageId();
            String cregId = res.getCanonicalRegistrationId();
            String errorCode = res.getErrorCodeName();
            String retMsg = "Message pushed : Id : " + id + "; CRegId: " + cregId + "; ErrorCode : " + errorCode;
            System.out.println(retMsg);
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
    }

    }

7d.

 
package com.centrifugegroup.molaappws.entity;

import java.util.Date;

public class ChatBot {
    private String deviceToken;
    private String messagetext;
    private Date messagedate;
    private String deviceid;
    private String username;
    private String lastname;
    private String firstname;
    private String senderToken;
    private String receiverToken;
    
    public ChatBot() {
        super();
    }


    public void setDeviceToken(String deviceToken) {
        this.deviceToken = deviceToken;
    }

    public String getDeviceToken() {
        return deviceToken;
    }

    public void setMessagetext(String messagetext) {
        this.messagetext = messagetext;
    }

    public String getMessagetext() {
        return messagetext;
    }

    public void setMessagedate(Date messagedate) {
        this.messagedate = messagedate;
    }

    public Date getMessagedate() {
        return messagedate;
    }

    public void setDeviceid(String deviceid) {
        this.deviceid = deviceid;
    }

    public String getDeviceid() {
        return deviceid;
    }


    public void setUsername(String username) {
        this.username = username;
    }

    public String getUsername() {
        return username;
    }


    public void setLastname(String lastname) {
        this.lastname = lastname;
    }

    public String getLastname() {
        return lastname;
    }

    public void setFirstname(String firstname) {
        this.firstname = firstname;
    }

    public String getFirstname() {
        return firstname;
    }

    public void setSenderToken(String senderToken) {
        this.senderToken = senderToken;
    }

    public String getSenderToken() {
        return senderToken;
    }


    public void setReceiverToken(String receiverToken) {
        this.receiverToken = receiverToken;
    }

    public String getReceiverToken() {
        return receiverToken;
    }
}

CRUD on recursive item list bound to JSF UI component like p:tree or jqxtree

Performing a CRUD operation simplified on UI Tree with recursive nth node. 

Introduction

You can Create Retrieve Update Delete a recursive list item using UITree.  

Extends draganddrop, context listing functionalities as seen below.

View -: Primefaces, jqxwidgets

Model -: MySQL or any db

Controller: JEE8 (JPA, JSF, Jersey)

Getting started.

Table: Organisationunit (Structure cloned from popular open source HMIS www.dhis2.org)

Entity from table : -Organisationunits 

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package com.dhis; import java.io.Serializable; import java.sql.Timestamp; import java.util.Date; import java.util.List; import javax.persistence.CascadeType; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.ManyToOne; import javax.persistence.NamedQueries; import javax.persistence.NamedQuery; import javax.persistence.OneToMany; import javax.persistence.Table; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity @NamedQueries({ @NamedQuery(name = "Organisationunit.findAll", query = "select o from Organisationunit o order by o.name") }) @Table(name = "\"organisationunit\"") public class Organisationunit implements Serializable { private static final long serialVersionUID = -3968423246581384889L; @Column(name = "address") private String address; @Temporal(TemporalType.DATE) @Column(name = "closeddate") private Date closeddate; @Column(name = "code", unique = true) private String code; @Column(name = "comment") private String comment; @Column(name = "contactPerson") private String contactPerson; @Column(name = "coordinates") private String coordinates; @Column(name = "created") private Timestamp created; @Column(name = "description") private String description; @Column(name = "email") private String email; @Column(name = "featureType") private String featureType; @Column(name = "hierarchylevel") private int hierarchylevel; @Column(name = "lastUpdated") private Timestamp lastUpdated; @Column(name = "name", nullable = false, unique = true) private String name; @Temporal(TemporalType.DATE) @Column(name = "openingdate") private Date openingdate; @Id @Column(name = "organisationunitid", nullable = false) private int organisationunitid; @Column(name = "parentid", nullable = false) private int parentid; @Column(name = "path", unique = true) private String path; @Column(name = "phoneNumber") private String phoneNumber; @Column(name = "shortname", nullable = false) private String shortname; @Column(name = "uid", unique = true) private String uid; @Column(name = "url") private String url; @Column(name = "userid") private int userid; @Column(name = "uuid") private String uuid; /* @ManyToOne @JoinColumn(name = "parentid",updatable=false,insertable=false) private Organisationunit organisationunit; @OneToMany(mappedBy = "organisationunit", cascade = { CascadeType.PERSIST, CascadeType.MERGE }) private List<Organisationunit> organisationunitList;*/ public Organisationunit() { } public Organisationunit(String address, Date closeddate, String code, String comment, String contactPerson, String coordinates, Timestamp created, String description, String email, String featureType, int hierarchylevel, Timestamp lastUpdated, String name, Date openingdate, int organisationunitid,String path, String phoneNumber, String shortname, String uid, String url, int userid, String uuid,int parentid) { this.address = address; this.closeddate = closeddate; this.code = code; this.comment = comment; this.contactPerson = contactPerson; this.coordinates = coordinates; this.created = created; this.description = description; this.email = email; this.featureType = featureType; this.hierarchylevel = hierarchylevel; this.lastUpdated = lastUpdated; this.name = name; this.openingdate = openingdate; this.organisationunitid = organisationunitid; // this.organisationunit = organisationunit; this.path = path; this.phoneNumber = phoneNumber; this.shortname = shortname; this.uid = uid; this.url = url; this.userid = userid; this.uuid = uuid; this.parentid = parentid; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public Date getCloseddate() { return closeddate; } public void setCloseddate(Date closeddate) { this.closeddate = closeddate; } public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getComment() { return comment; } public void setComment(String comment) { this.comment = comment; } public String getContactPerson() { return contactPerson; } public void setContactPerson(String contactPerson) { this.contactPerson = contactPerson; } public String getCoordinates() { return coordinates; } public void setCoordinates(String coordinates) { this.coordinates = coordinates; } public Timestamp getCreated() { return created; } public void setCreated(Timestamp created) { this.created = created; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public String getFeatureType() { return featureType; } public void setFeatureType(String featureType) { this.featureType = featureType; } public int getHierarchylevel() { return hierarchylevel; } public void setHierarchylevel(int hierarchylevel) { this.hierarchylevel = hierarchylevel; } public Timestamp getLastUpdated() { return lastUpdated; } public void setLastUpdated(Timestamp lastUpdated) { this.lastUpdated = lastUpdated; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Date getOpeningdate() { return openingdate; } public void setOpeningdate(Date openingdate) { this.openingdate = openingdate; } public int getOrganisationunitid() { return organisationunitid; } public void setOrganisationunitid(int organisationunitid) { this.organisationunitid = organisationunitid; } public String getPath() { return path; } public void setPath(String path) { this.path = path; } public String getPhoneNumber() { return phoneNumber; } public void setPhoneNumber(String phoneNumber) { this.phoneNumber = phoneNumber; } public String getShortname() { return shortname; } public void setShortname(String shortname) { this.shortname = shortname; } public String getUid() { return uid; } public void setUid(String uid) { this.uid = uid; } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public int getUserid() { return userid; } public void setUserid(int userid) { this.userid = userid; } public String getUuid() { return uuid; } public void setUuid(String uuid) { this.uuid = uuid; } /* public Organisationunit getOrganisationunit() { return organisationunit; } public void setOrganisationunit(Organisationunit organisationunit) { this.organisationunit = organisationunit; } public List<Organisationunit> getOrganisationunitList() { return organisationunitList; } public void setOrganisationunitList(List<Organisationunit> organisationunitList) { this.organisationunitList = organisationunitList; } public Organisationunit addOrganisationunit(Organisationunit organisationunit) { getOrganisationunitList().add(organisationunit); organisationunit.setOrganisationunit(this); return organisationunit; } public Organisationunit removeOrganisationunit(Organisationunit organisationunit) { getOrganisationunitList().remove(organisationunit); organisationunit.setOrganisationunit(null); return organisationunit; }*/ public void setParentid(int parentid) { this.parentid = parentid; } public int getParentid() { return parentid; } }

JPA/EJB

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package com.dhis; import java.util.List; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.EntityTransaction; import javax.persistence.Persistence; import javax.persistence.Query; public class JavaSF { private final EntityManager em; public JavaSF() { final EntityManagerFactory emf = Persistence.createEntityManagerFactory("dhisPU"); em = emf.createEntityManager(); } /** * All changes that have been made to the managed entities in the * persistence context are applied to the database and committed. */ public void commitTransaction() { final EntityTransaction entityTransaction = em.getTransaction(); if (!entityTransaction.isActive()) { entityTransaction.begin(); } entityTransaction.commit(); } public Object queryByRange(String jpqlStmt, int firstResult, int maxResults) { Query query = em.createQuery(jpqlStmt); if (firstResult > 0) { query = query.setFirstResult(firstResult); } if (maxResults > 0) { query = query.setMaxResults(maxResults); } return query.getResultList(); } public <T> T persistEntity(T entity) { em.persist(entity); commitTransaction(); return entity; } public <T> T mergeEntity(T entity) { entity = em.merge(entity); commitTransaction(); return entity; } public void removeOrganisationunit(Organisationunit organisationunit) { organisationunit = em.find(Organisationunit.class, organisationunit.getOrganisationunitid()); em.remove(organisationunit); commitTransaction(); } /** <code>select o from Organisationunit o</code> */ public List<Organisationunit> getOrganisationunitFindAll() { return em.createNamedQuery("Organisationunit.findAll", Organisationunit.class).getResultList(); } } Managed Beans

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package com.dhis.beans; import com.dhis.JavaSF; import com.dhis.Organisationunit; import java.util.ArrayList; import java.util.List; import javax.faces.bean.ManagedBean; import javax.faces.bean.ViewScoped; import org.primefaces.model.DefaultTreeNode; import org.primefaces.model.TreeNode; @ManagedBean(name = "OrgBean") @ViewScoped public class Organisationunits { private List<Organisationunit> organisationUnitSubList, organisationUnitSubList2 = new ArrayList<Organisationunit>(); private List<Organisationunit> organisationUnitList = new ArrayList<Organisationunit>(); private TreeNode root; private TreeNode subList; private TreeNode selectedNode; public Organisationunits() { HRTree(); } public List<Organisationunit> OrganisationUnitSubList(int i) { organisationUnitSubList2 = new ArrayList<Organisationunit>(); for (Organisationunit hue : getOrganisationUnitList()) { if (hue.getParentid() == i) organisationUnitSubList2.add(hue); } return organisationUnitSubList2; } private void HRTree() { root = new DefaultTreeNode("Root", null); JavaSF jsf = new JavaSF(); setOrganisationUnitList(new ArrayList<Organisationunit>()); setOrganisationUnitList(jsf.getOrganisationunitFindAll()); recursiveList(getOrganisationUnitList(), 0, root); } public void recursiveList(List<Organisationunit> liste, int id, TreeNode node) { organisationUnitSubList = new ArrayList<Organisationunit>(); organisationUnitSubList = OrganisationUnitSubList(id); for (Organisationunit hue : organisationUnitSubList) { TreeNode childNode = new DefaultTreeNode(new Organisationunit(hue.getAddress(), hue.getCloseddate(), hue.getCode(), hue.getComment(), hue.getContactPerson(), hue.getCoordinates(), hue.getCreated(), hue.getDescription(), hue.getEmail(), hue.getFeatureType(), hue.getHierarchylevel(), hue.getLastUpdated(), hue.getName(), hue.getOpeningdate(), hue.getOrganisationunitid(), hue.getPath(), hue.getPhoneNumber(), hue.getShortname(), hue.getUid(),hue.getUrl(),hue.getUserid(),hue.getUuid(),hue.getParentid()), node); recursiveList(organisationUnitSubList, hue.getOrganisationunitid(), childNode); childNode.setExpanded(false); } } public void setOrganisationUnitList(List<Organisationunit> organisationUnitList) { this.organisationUnitList = organisationUnitList; } public List<Organisationunit> getOrganisationUnitList() { return organisationUnitList; } public void setRoot(TreeNode root) { this.root = root; } public TreeNode getRoot() { return root; } public void setSelectedNode(TreeNode selectedNode) { this.selectedNode = selectedNode; } public TreeNode getSelectedNode() { return selectedNode; } }

Bound to UI
1. (Primefaces Tree)

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<?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:p="http://primefaces.org/ui"> <h:head></h:head> <h:body> <h:form> <h:panelGrid columns="1" > <p:scrollPanel style="height:1500px;border:none" mode="native" > <p:tree value="#{OrgBean.root}" var="node" dynamic="false" id="HRTree_id" style="width:100%" selectionMode="single" selection="#{OrgBean.selectedNode}" draggable="true" droppable="true"> <!--p:ajax event="dragdrop" listener="#{OrgBean.onDragDrop}" update=":mainForm:spm"/--> <p:treeNode> <p:commandLink value="#{node.name}" /> </p:treeNode> <!--p:ajax event="select" listener="#{OrgBean.onTreeSelection}" update=":mainForm:hustab:pnid"/--> </p:tree> </p:scrollPanel> </h:panelGrid> </h:form> </h:body> </html>

2. JQxWidget

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<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:jsf="http://xmlns.jcp.org/jsf" xmlns:f="http://java.sun.com/jsf/core" xmlns:p="http://primefaces.org/ui"> <head jsf:id="hd"> <title id='Description'>In this demo the jqxInput is bound to JSON data.</title> <link rel="stylesheet" href="resources/jqwidgets/styles/jqx.base.css" type="text/css"/> <script type="text/javascript" src="resources/scripts/jquery-1.11.1.min.js"></script> <script type="text/javascript" src="resources/scripts/demos.js"></script> <script type="text/javascript" src="resources/jqwidgets/jqxcore.js"></script> <script type="text/javascript" src="resources/jqwidgets/jqxdata.js"></script> <script type="text/javascript" src="resources/jqwidgets/jqxinput.js"></script> <script type="text/javascript" src="resources/jqwidgets/jqxbuttons.js"></script> <script type="text/javascript" src="resources/jqwidgets/jqxscrollbar.js"></script> <script type="text/javascript" src="resources/jqwidgets/jqxpanel.js"></script> <script type="text/javascript" src="resources/jqwidgets/jqxtree.js"></script> <script type="text/javascript" src="resources/jqwidgets/jqxradiobutton.js"></script> <script type="text/javascript" src="resources/jqwidgets/jqxcheckbox.js"></script> </head> <body> <script type="text/javascript"> $(document).ready(function () { var url = 'http://127.0.0.1:7101/jhtml/faces/rest/PEws/orgunits' // prepare the data var source = { datatype: "json", datafields: [ { name: 'organisationunitid' }, { name: 'parentid' }, { name: 'name' }, { name: 'organisationunitid' }, { name: 'shortname' }, ], id: 'organisationunitid', url: url, async: false }; // create data adapter. var dataAdapter = new $.jqx.dataAdapter(source); // perform Data Binding. dataAdapter.dataBind(); var records = dataAdapter.getRecordsHierarchy('organisationunitid', 'parentid', 'items', [{ name: 'shortname', map: 'label'}, { name: 'organisationunitid', map: 'id'} ]); $('#jqxWidget').jqxTree( { source: records, width: '300px', checkboxes: false}); }); </script> <div id='jqxWidget'> </div> </body> </html>

Bind the JQxWidget Tree to a json

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package com.test; import com.dhis.JavaSF; import com.dhis.Organisationunit; import java.util.List; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; @Path("/PEws") public class PEws { @GET @Path("orgunits") @Produces(MediaType.APPLICATION_JSON) public List<Organisationunit> orgunit() { JavaSF jsf = new JavaSF(); return jsf.getOrganisationunitFindAll(); } }

web.xml

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<?xml version = '1.0' encoding = 'UTF-8'?> <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_3_0.xsd" version="3.0"> <servlet> <servlet-name>Faces Servlet</servlet-name> <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>/faces/*</url-pattern> </servlet-mapping> <context-param> <param-name>javax.faces.FACELETS_VIEW_MAPPINGS</param-name> <param-value>*.jsf;*.xhtml</param-value> </context-param> <servlet> <servlet-name>Jersey REST Service</servlet-name> <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class> <init-param> <param-name>jersey.config.server.provider.packages</param-name> <param-value>com.test</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <context-param> <param-name>facelets.SKIP_COMMENTS</param-name> <param-value>true</param-value> </context-param> <servlet-mapping> <servlet-name>Jersey REST Service</servlet-name> <url-pattern>/rest/*</url-pattern> </servlet-mapping> </web-app>