Reinitialise taskFlow in dynamic region and set focus to default activity

Hello All

We all use bounded task flows in ADF application development and to switch between multiple task flows we use concept of dynamic region

Recently I came across a problem about dynamic region and bounded task flows, Scenario is like this

I have dropped a BTF in dynamic region and there is a link on page to open that task flow and those who have used dynamic region would be familiar with this piece of code

ADF Basics: Creating Bounded Task Flow Train using af:train component

This post is about using bounded task flow as train
A train presents a whole cycle and it's every stop presents a particular step of cycle
From the docs -

The train component presents a user with a series of stops, each stop representing a step in a multi-step process. The train walks the user through these steps, in a suggested order (the order being dictated by the underlying model). Each step is rendered as a train stop consisting of an image and a textual link indicating if they are in visited, current, unvisited and disabled states. Train can also be rendered in a vertical layout - the default being a horizontal layout. Trains are not rendered on printable pages. 

ADF Basics: Using setActionListener in ADF, Set pageFlowScope parameter without writing code

This post is about using setActionListener tag in ADF, this tag provides a simpler way to set values of other objects and makes use of EL
See What docs says-

The setActionListener tag is a declarative way to allow an action source (<commandButton>, <commandLink>, etc.) to set a value before navigation. It is perhaps most useful in conjunction with the "pageFlowScope" EL scope provided by ADF Faces, as it makes it possible to pass details from one page to another without writing any Java code. This tag can be used both with ADF Faces commands and JSF standard tags. More generally, it can be used with any component at all that implements the standard ActionSource interface.

Adding Drag and Drop Functionality for collections in page fragments to create insert

Hello All,
This tutorial is based on using Drag & Drop functionality in collections as af:table to create a new row
i have googled about Drag & Drop but was not able to implement in page fragments(.jsff), all samples was based on JSPX page.

this tutorial is based on DEPARTMENTS table (Default HR Schema) and an other table with Same Structure DEPARTMENTS_DUPL to implement drag and drop.
my scenario is to add row in DEPARTMENTS_DUPL from Departments 
 See the steps to implement- 

•  First create Departments_dupl table in your HR schema, simply run this script



CREATE TABLE DEPARTMENTS_DUPL
  (
    DEPARTMENT_ID   NUMBER(4, 0) ,
    DEPARTMENT_NAME VARCHAR2(30 BYTE) ,
    MANAGER_ID      NUMBER(6, 0) ,
    LOCATION_ID     NUMBER(4, 0)
  )



• Now create Fusion Web Application and create business components

• Now create a bounded taskflow and a page fragment in it, and drop both tables on page
  
  
  
• Now drop af:dragSource as child of Departments table and set properties, here discriminant is to ensure compatibility between drag and drop components, and its value must match for Drag source and Drop Target

• now drop af:dropTarget as child of DepartmentsDupl table and set properties as Action etc and create a DropListener for it that handles drop event, set Flavor class to java.lang.Object

• Now select af:dropTarget and goto source and set value for discriminant same as drag source



  <af:dropTarget dropListener="#{pageFlowScope.DragDropSampleBean.deptDropListener}" actions="COPY">
          <af:dataFlavor discriminant="copyDept" flavorClass="java.lang.Object"/>
        </af:dropTarget>





• Now write code to create a new row in DepartmentsDupl and insert data from Departments on Drop Listener




    public void dragDropAction() {
        ViewObject dept = this.getDepartments1();
        ViewObject deptDupl = this.getDepartmentsDupl1();
        Row curDept = dept.getCurrentRow();
     
        Row dupl = deptDupl.createRow();
        dupl.setAttribute("DepartmentId", curDept.getAttribute("DepartmentId"));
        dupl.setAttribute("DepartmentName", curDept.getAttribute("DepartmentName"));
        dupl.setAttribute("ManagerId", curDept.getAttribute("ManagerId"));
        dupl.setAttribute("LocationId", curDept.getAttribute("LocationId"));
        deptDupl.insertRow(dupl);
        deptDupl.executeQuery();
        this.getDBTransaction().commit();
    }



• Now Run your page and use this cool functionality :-)

 Download Sample App Cheers :-)

Using Java API for getting Weather information in Oracle ADF-wunderground-core

hello everyone, here is nice tutorial for all ADF techies-

i have developed an application in ADF that retrieves weather information of a country's weather stations.

as-temperature, humidity, dew, rain rate, wind speed etc using wunderground-core 

API . This API fetch weather data for a weater station by given month and year or data for all the stations of a country.

Feature of this wunderground-core-

1. Very simple to use
2. Date Listener support
3. Fetch weather data for all stations of country
4. can be used with desktop or web application
5. Ajax supported
6. Real Time weather values

Snap-

 Change Country-

Download wunderground-core API- https://code.google.com/p/wunderground-core/downloads/list

and download jar distribution with all dependencies

• Now start , create a fusion web application and add jar file to  classpath

• Now create a bounded taskflow and a .jsff page inside this , now see the simple code to get all weather station of acountry and their weather data



        /*  create an instance of WeatherStationService */
        WeatherStationService weatherStationService = new WeatherStationService();

        /*  find all weather stations */
        List<WeatherStation> stations = weatherStationService.findAllWeatherStationsByCountry("INDIA");

        
        for (WeatherStation weatherStation : stations) {
            System.out.println(weatherStation.getStationId() + "\t" + "\t" + weatherStation.getCity() + "\t" +
                               weatherStation.getCountry());

            HttpDataReaderService dataReader = new HttpDataReaderService();
            dataReader.setWeatherStation(weatherStation);
            DataSet current = dataReader.getCurrentData();

            System.out.println(current.getDateTime() + "Temperature- " + current.getTemperature() + "Humidity-" +
                               current.getHumidity());



• I have used this code on my af:commandButton for getting weather data, and a table on page to show this information on page using list (arrayList) , rest is same and simple like other ADF Application
• Download Sample Application and see it, you will also learn that how to show a table using List(Java) Sample ADF Application





• See source of .jsff page for tables'use and values-



<?xml version='1.0' encoding='UTF-8'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1" xmlns:af="http://xmlns.oracle.com/adf/faces/rich"
          xmlns:f="http://java.sun.com/jsf/core">
    <af:panelBox text="Weather Report App-www.javadrive.co.in" id="pb1" showDisclosure="false">
        <f:facet name="toolbar"/>
        <af:panelFormLayout id="pfl1">
            <af:inputText label="Country Name" id="it1"
                          contentStyle="text-transform:upperCase;color:green;font-weight:bold;"
                          binding="#{WeatherReportBean.cntryNameBind}"/>
            <af:commandButton text="Get Report" id="cb1" actionListener="#{WeatherReportBean.getWeatherReportButton}"
                              inlineStyle="font-weight:bold;"/>
        </af:panelFormLayout>
        <af:popup childCreation="deferred" autoCancel="disabled" id="p1">
            <af:dialog id="d1" title="User-User4" type="none">
                <f:facet name="buttonBar"/>
                <af:message id="m1" message="You are not authorize to make an order of 25000, your limit is 20000 !!!"
                            messageType="error"/>
            </af:dialog>
        </af:popup>
        <af:panelGroupLayout id="pgl1" layout="horizontal">
            <af:table var="row" rowBandingInterval="1" id="t1" value="#{WeatherReportBean.stations}"
                      partialTriggers="::cb1" contentDelivery="immediate" width="500">
                <af:column sortable="false" headerText="Country" id="c3">
                    <af:spacer width="10" height="10" id="s2"/>
                    <af:outputText value="#{row.country}" id="ot3" inlineStyle="font-weight:bold;color:red;"/>
                    <af:spacer width="10" height="10" id="s1"/>
                </af:column>
                <af:column sortable="false" headerText="Locality" id="c4" width="150">
                    <af:outputText value="#{row.neighborhood}" id="ot4"/>
                </af:column>
                <af:column sortable="false" headerText="City" id="c2">
                    <af:outputText value="#{row.city}" id="ot2" inlineStyle="font-weight:bold;color:darkgreen;"/>
                </af:column>
                <af:column sortable="false" headerText="Station Id" id="c1">
                    <af:outputText value="#{row.stationId}" id="ot1" inlineStyle="font-weight:bold;color:darkblue;"/>
                </af:column>
            </af:table>
            <af:table value="#{WeatherReportBean.reportL}" var="row" rowBandingInterval="1" id="t2"
                      contentDelivery="immediate" partialTriggers="::t1 ::cb1" styleClass="AFStretchWidth" width="800">
                <af:column sortable="false" headerText="Date" align="start" id="c5">
                    <af:spacer width="10" height="10" id="s4"/>
                    <af:outputText value="#{row.currDate}" id="ot5" inlineStyle="font-weight:bold;">
                        <af:convertDateTime pattern="dd/MMM/yyyy"/>
                    </af:outputText>
                    <af:spacer width="10" height="10" id="s3"/>
                </af:column>
                <af:column sortable="false" headerText="Temperature" align="end" id="c6" width="70">
                    <af:outputText value="#{row.temp} C" id="ot6" inlineStyle="font-weight:bold;color:teal;"/>
                </af:column>
                <af:column id="c7" headerText="Humidity" align="right" width="70">
                    <af:outputText value="#{row.humid}" id="ot7" inlineStyle="font-weight:bold;color:orange;"/>
                </af:column>
                <af:column id="c8" headerText="Dew Point" align="right" width="70">
                    <af:outputText value="#{row.dewR}" id="ot8" inlineStyle="font-weight:bold;color:green;"/>
                </af:column>
                <af:column id="c9" headerText="Wind Direction" align="right" width="70">
                    <af:outputText value="#{row.windDirec}" id="ot9" inlineStyle="font-weight:bold; color:Olive;"/>
                </af:column>
                <af:column id="c10" headerText="Wind Speed (Km/H)" align="right">
                    <af:outputText value="#{row.windSpd}" id="ot10"
                                   inlineStyle="color:ActiveCaption;font-weight:bold;"/>
                </af:column>
                <af:column id="c11" headerText="Rain Rate" align="right" width="70">
                    <af:outputText value="#{row.rainRt}" id="ot11" inlineStyle="font-weight:bold;color:maroon;"/>
                </af:column>
                <af:column id="c12">
                    <af:image shortDesc="Weather" id="i1"
                              source="#{row.temp >35 ? resource['images:sun.png'] : resource['images:sun_slush.png']}"/>
                </af:column>
            </af:table>
        </af:panelGroupLayout>
    </af:panelBox>
</jsp:root>



• And see managed bean code to populate data in tables on page, other than manged bean i have used a java bean to populate value in list and then in table
• WeatherReportBean.java- 



package weather.view.bean;

import de.mbenning.weather.wunderground.api.domain.DataSet;
import de.mbenning.weather.wunderground.api.domain.WeatherStation;
import de.mbenning.weather.wunderground.impl.services.HttpDataReaderService;
import de.mbenning.weather.wunderground.impl.services.WeatherStationService;

import java.io.Serializable;

import java.sql.SQLException;

import java.util.ArrayList;
import java.util.List;

import javax.faces.event.ActionEvent;

import oracle.adf.view.rich.component.rich.input.RichInputText;

import oracle.jbo.domain.Date;

public class WeatherReportBean implements Serializable {
    private RichInputText cntryNameBind;

    public WeatherReportBean() {
    }
    WeatherStationService weatherStationService = new WeatherStationService();

    List<WeatherStation> stations;
    List<Report> reportL;


    public void getWeatherReportButton(ActionEvent actionEvent) throws SQLException {
        if (cntryNameBind.getValue() != null) {
            String cntryName = cntryNameBind.getValue().toString();

            stations = weatherStationService.findAllWeatherStationsByCountry(cntryName);
            reportL = new ArrayList<Report>(50);
            for (WeatherStation weatherStation : stations) {

                HttpDataReaderService dataReader = new HttpDataReaderService();
                dataReader.setWeatherStation(weatherStation);
                DataSet current = dataReader.getCurrentData();

                java.util.Date b = new java.util.Date();
                Double c = new Double(0);
                Integer humidity = 0;
                Double dew = new Double(0);
                String windDir = "";
                Double windSp = new Double(0);
                Double rainRate = new Double(0);

                if (current != null) {
                    if (current.getDateTime() != null) {
                        b = current.getDateTime();
                        c = current.getTemperature();
                        humidity = current.getHumidity();
                        dew = current.getDewPoint();
                        windDir = current.getWindDirection();
                        windSp = current.getWindSpeedKmh();
                        rainRate = current.getRainRateHourlyMm();
                        System.out.println("Humidity is-->" + current.getHumidity() + "dew point-->" +
                                           current.getDewPoint() + "wind -->" + current.getWindDirection() +
                                           "speed--" + current.getWindSpeedKmh());


                    }
                }

                reportL.add(new Report(b, c, humidity, dew, windDir, windSp, rainRate));

            }


        }

    }

    public void setStations(List<WeatherStation> stations) {
        this.stations = stations;
    }

    public List<WeatherStation> getStations() {
        return stations;
    }

    public void setReportL(List<Report> reportL) {
        this.reportL = reportL;
    }

    public List<Report> getReportL() {
        return reportL;
    }

    public void setCntryNameBind(RichInputText cntryNameBind) {
        this.cntryNameBind = cntryNameBind;
    }

    public RichInputText getCntryNameBind() {
        return cntryNameBind;
    }
}



• Report.java- bean class to populate list



package weather.view.bean;

import java.util.Date;

public class Report {

    private Date CurrDate;
    private double temp;
    Integer humid;
    Double dewR;
    String windDirec;
    Double windSpd;
    Double rainRt;

    public Report(Date date, Double double1, Integer hum, Double de, String windD, Double windS, Double Rain) {
        System.out.println("date is-->" + date + "and temp is-->" + double1);

        this.CurrDate = date;
        setTemp(double1);
        this.humid = hum;
        this.dewR = de;
        this.windDirec = windD;
        this.windSpd = windS;
        this.rainRt = Rain;


    }


    public void setCurrDate(Date CurrDate) {
        this.CurrDate = CurrDate;
    }

    public Date getCurrDate() {
        return CurrDate;
    }

    public void setTemp(double temp) {
        this.temp = temp;
    }

    public double getTemp() {
        return temp;
    }

    public void setHumid(Integer humid) {
        this.humid = humid;
    }

    public Integer getHumid() {
        return humid;
    }

    public void setDewR(Double dewR) {
        this.dewR = dewR;
    }

    public Double getDewR() {
        return dewR;
    }

    public void setWindDirec(String windDirec) {
        this.windDirec = windDirec;
    }

    public String getWindDirec() {
        return windDirec;
    }

    public void setWindSpd(Double windSpd) {
        this.windSpd = windSpd;
    }

    public Double getWindSpd() {
        return windSpd;
    }

    public void setRainRt(Double rainRt) {
        this.rainRt = rainRt;
    }

    public Double getRainRt() {
        return rainRt;
    }
}

Download file from url using Oracle ADF & Java- Download Manager

In this tutorial i will show you how to download a file from its url (web)-
as- http://www.tutorialspoint.com/java/java_tutorial.pdf
This will work as a simple download manager, you can add file url to download it and save it.
This tutorial makes use of FileHandling and java.net.URL class in java.

• User Interface is very simple to design as it have only one input text and one button, so create a fusion web application , and a bounded taskflow with a page fragment in it
• Now drag a Input text to enter url and a button to perform action on it from Componenet palette .
• Bind input text to bean to get its value from page



 private RichInputText fileUrlBind;

    public void setFileUrlBind(RichInputText fileUrlBind) {
        this.fileUrlBind = fileUrlBind;
    }

    public RichInputText getFileUrlBind() {
        return fileUrlBind;
    }

• Now create actionListener to managed bean and write code for downloading file from given url- see code



    public void DownloadFileButton(ActionEvent actionEvent) {
        try {
            if (fileUrlBind.getValue() != null) {
                String fileUrl = fileUrlBind.getValue().toString();
                if (fileUrl.startsWith("http://")) {
                    String msgNm = fileUrl.substring(7);

                    cnctmsgBind.setValue("Connecting to " + msgNm + "....");

                    URL url = new URL(fileUrl);
                    url.openConnection();
                    InputStream reader = url.openStream();


                    FileOutputStream writer =
                        new FileOutputStream("C:/javadrive." + fileUrl.substring(fileUrl.lastIndexOf(".")));
                    byte[] buffer = new byte[153600];
                    int totalBytesRead = 0;
                    int bytesRead = 0;

                   
                    dwnldMsgBind.setValue("Reading file 150KB blocks at a time");
                    while ((bytesRead = reader.read(buffer)) > 0) {
                        writer.write(buffer, 0, bytesRead);
                        buffer = new byte[153600];
                        totalBytesRead += bytesRead;
                    }
                 
                    alerMsgBind.setValue("File is downloaded successfully, look at your c drive :-)");
                    writer.close();
                    reader.close();
                } else {
                    FacesMessage errMsg = new FacesMessage("Something went wrong");
                    errMsg.setSeverity(FacesMessage.SEVERITY_ERROR);
                    errMsg.setDetail("Example- http://www.javadrive.co.in/java.pdf");
                    FacesContext context = FacesContext.getCurrentInstance();
                    context.addMessage(fileUrlBind.getClientId(), errMsg);
                }
            }
        } catch (MalformedURLException e) {
            FacesMessage errMsg = new FacesMessage("Something went wrong");
            errMsg.setSeverity(FacesMessage.SEVERITY_ERROR);
            FacesContext context = FacesContext.getCurrentInstance();
            context.addMessage(null, errMsg);
            e.printStackTrace();
        } catch (IOException e) {
            FacesMessage errMsg = new FacesMessage("Something went wrong");
            errMsg.setSeverity(FacesMessage.SEVERITY_ERROR);
            FacesContext context = FacesContext.getCurrentInstance();
            context.addMessage(null, errMsg);
            e.printStackTrace();
        }


    }






• Now Run your application and see downloaded file in your c drive as path is hard coded in bean

•  See your downloaded file in c drive

 

•  Download Sample Application- Happy Coding Sample ADF Application