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JavaSIG Flex Yakov

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Published on November 27, 2007

Author: Boyce

Source: authorstream.com

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Slide1:  Using Adobe Flex 2 with Java Web applications Yakov Fain and Dr. Victor Rasputnis Java SIG, New York, September 13 2006 Slide2:  Who we are Mentoring consultants Software Engineers Educators What we do Mentoring Consulting Training Publications Books Articles Blogs Adobe Exchange Open Source Projects DaoFlex FlexBI fAnt log4f Slide3:  Our Roadmap to Flex Slide4:  RIA can be delivered to the client via: Java (VM) AJAX (JavaScript) Flash Player (VM) In 2007: Apollo and Microsoft’s WPF Open source is cool, but don’t you miss professional software? RIA – The Major Choices Slide5:  Sheryl Crow sings Slide6:  Sheryl Crow sings about Java Swing Slide7:  <?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" viewSourceURL="srcview/index.html"> <mx:Label text=“A very simple tree control"/> <mx:Tree id="tree1" labelField="@label" showRoot="false" width="400"> <mx:dataProvider> <mx:XML format="e4x"> <folder label="TOC"> <folder label="Chapter 1"/> <folder label="Chapter 2"/> <folder label="Chapter 3" > <Sample label="HelloWorld" /> <Sample label="HelloBasil" /> <Sample label="HelloTree" /> </folder> <folder label="Chapter 4" /> </folder> </mx:XML> </mx:dataProvider> </mx:Tree> </mx:Application> Flex 2 Declarative GUI Programming Slide8:  Flex 2 is a combination of frameworks, languages and tools: Free as food stamps: MXML – an XML-based declarative programming language for creating GUI ActionScript 3.0 – object oriented language very similar to Java Flash Player 9 – a virtual machine (1.2MB ) that runs your compiled bytecode (.SWF). Penetration rate: 50% in 3 months. Command line compilers and debugger Flex Data Services Express – a Web application deployed in J2EE server (single CPU) And this is gonna cost you: Flex Builder – Eclipse based IDE ($500) Flex Builder with Charting component ($600 - $749). Educational license - $79 Flex Data Services Departmental, 100 concurrent users ($6K per CPU) Flex Data Services Enterprise, unlimited users ($20K per CPU) What is Flex 2 and how much? Slide9:  OK, just put a pretty Flash Player’s face to your JSP/ASP/PHP… Ain’t gonna pay no stinkin’ money!!!! Slide10:  RPC with POJO, JMS, Web Services, HTTP with remote URLs Deploy the .war with Flex Data Services and configure your destinations OK, OK I’ve got some cash in the mattress A Typical Struts WorkFlow:  A Typical Struts WorkFlow User Machine J2EE Application Server Browser Action Class Struts Action Servlet Reguest, http/s Page Response (HTML) HTML Page JSP Action Mapping POJO / EJB Form Flex-Struts Integration, Take 1:  Flex-Struts Integration, Take 1 User Machine J2EE Application Server Browser Action Class Struts Action Servlet Application reguest HTML With Flash Player JSP Action Mapping POJO / EJB Form Flex Data Services Data request (HTTPService) Data response - XML Approach 1: Add Flex on top of existing Struts app as is. Flex-Struts Integration: Take 2:  Flex-Struts Integration: Take 2 User Machine J2EE Application Server Browser Action Class Struts Action Servlet Application reguest Action Mapping POJO / EJB Flex Data Services Data request: Typed Beans Data response: Typed Beans Flex Data Services Remote POJO (Façade) Do we really need the request-form maze of Struts? JSP HTML With Flash Player Flex-Struts: Take 3, No Struts:  Flex-Struts: Take 3, No Struts User Machine J2EE Application Server Browser Action Class Struts Action Servlet Application reguest Flex Data Services Data request: Typed beans Data response: Typed beans Flex Data Services Remote POJO (Façade) POJO / EJB As RIA handles UI navigation on the client, the entire notion of Flow-based Web frameworks becomes obsolete. JSP HTML With Flash Player Slide15:  Flex Data Binding This is a process of linking data of one object to another. Changes in one (source) are reflected in another (destination) automatically. No need to write property event listeners or fire events Java Bean Bindings (JSR 295) It won’t be available till late 2007. JGoodies framework supports binding, but it’s a bit verbose Flex 2: Data Binding Slide16:  How many lines of Java code it takes to read and parse this xml file, concatenate the last and first names and generate this output? <?xml version="1.0" encoding="UTF-8"?> <people> <person> <name> <first>Yakov</first> <last>Fain</last> </name> <age>22</age> <skills>java, HTML, SQL</skills> </person> <person> <name> <first>Victor</first> <last>Rasputnis</last> </name> <age>21</age> <skills>PowerScript, JavaScript, ActionScript</skills> </person> <person> <name> <first>Anatole</first> <last>Tartakovsky</last> </name> <age>20</age> <skills>SQL, C++, Java</skills> </person> </people> Flex 2: Simple XML processing with E4X Slide17:  Read the XML file, display it in a data grid concatenating values of the <first> and <last> elements Size matters: the smaller the better! Slide18:  Bringing together Data Binding, E4X and RegEx becomes: plus regular expression: This: <mx:DataGrid dataProvider="{myXmlFile.person.(/Java? ?,/i.test( skills ))}"> Slide19:  Easy audio/video programming and delivery ActionScript 3 is an object-oriented language similar to Java, plus support of Dynamic classes Closures CSS Namespaces and more. Flex 2 framework is fully extendable, and its source code is available. You write/debug programs in Eclipse-based IDE: Flex Builder Some other appealing Flex features Slide20:  Model-View-Controller moves to the client’s PC. You can and should maintain the state on the client. Flex is a Messaging– Enabled Client with a server push support (publish-subscribe). Binary sockets support. Flex is a Service Oriented Client Slide21:  Flash/Flex on the front is getting prices using Flex Data Services and a feed from the server and the news using HTTPService. Data Binding in action. A Sample Stock Portfolio application Samples of Data Binding used in Portfolio Application:  Samples of Data Binding used in Portfolio Application Error Display [Bindable] private var errorText:String; private function onFault(event:FaultEvent):void { errorText = "Portfolio feed failure...“ + "Destination:" + event.currentTarget.destination + "\n" + "Fault code:" + event.fault.faultCode + ; … <mx:Label color="red" text="{errorText}" Master-Detail <!– PortfolioViewis a master and FinancialNews is a detail data grid  <PortfolioView id="pv"/> <FinancialNews security="{pv.selectedSecurity}"/> HTTPService to Data Grid <mx:HTTPService id="newsFeed" destination="YahooFinancialNews" resultFormat="e4x" fault="onFault(event)" > <mx:DataGrid id="newsGrid“ dataProvider="{newsFeed.lastResult.channel.item}" A Property in FinancialNews public function set security(value:String):void { this.title = "News: " + value; newsFeed.send({s:value}); } Slide23:  Live Demo A Sample Stock Portfolio application Slide24:  Introductions Tasks Overview Building Query DaoFlex – MXML/ActionScript/Java code generator Generated code review (live demo) SuperGrid Control Saving base reports as templates FlexBI – flexible end-user driven reporting tool Introducing Flex 2 Custom Components WebTier compilation engine for business formulas, expressions and complete design Database-based deployment of the reports Slide25:  Simple SQL statements in annotated Java doclet format Mix and match Java and SQL methods Full support for CRUD annotations Query Design Code Generation BIRT Deployment User Experience Tasks Overview Produce Java DAO code in both Remoting and DataServices formats MXML UI and ActionScript data transfer objects Report Metadata Deployment descriptors, etc Flexible and extensible templates Store report in the database in both MXML and compiled SWF format Full control of Layout, Sort, Grouping, Formulas, Filters, Query Parameters Standard business functions: Export to Excel Printing eMail DaoFlex: RAD approach to Data Access in Flex:  DaoFlex: RAD approach to Data Access in Flex P R O D U C T I V I T Y Eliminate the need for manual Java coding of data access tasks Eliminate the need of manual synchronization of data transfer classes on Java and ActionScript side Eliminate the need of manual synchronization of DataGridColumn definitions with ActionScript classes. And more… Slide27:  Code generation solution that completely automates manual Java coding for CRUD (create, retrieve, update, delete) tasks Integrates with Eclipse or works standalone as Ant task Goes all the way from simple annotated Java class to deployed JARs in the WEB-INF/lib Generates all required Java, ActionScript, MXML, XML DaoFlex At A Glance package com.theriabook.datasource; /** * @daoflex:webservice * pool=jdbc/theriabook */ public abstract class Employee { /** * @daoflex:sql * sql= select * from employee where start_date < :startDate * transferType=EmployeeDTO[] * keyColumns=emp_id */ public abstract List getEmployees(Date startDate); } Slide28:  package com.theriabook.datasource; /** * @daoflex:webservice * pool=jdbc/theriabook */ public abstract class Employee { /** * @daoflex:sql * sql= select * from employee where start_date < :startDate * transferType=EmployeeDTO[] * keyColumns=emp_id */ public abstract List getEmployees(Date startDate); } DaoFlex Input: Annotated Abstract Class Slide29:  The deployed sample application is here Application Completely Built by DaoFlex Slide30:  Code-generation of all required Java, ActionScript, MXML, configuration files is based on the pre-written customizable XSL templates Code generation includes connecting to the database and obtaining result set metadata XSL Templates are processing combined metadata extracted from DB with info extracted from the Doclet tags DaoFlex: Sources of Metadata package com.theriabook.datasource; /* @daoflex:webservice * pool=jdbc/theriabook */ public abstract class Employee { /* @daoflex:sql * sql= select * from employee where start_date < :startDate * transferType=EmployeeDTO[] * keyColumns=emp_id */ public abstract List getEmployees(Date startDate); } Slide31:  DaoFlex Process Diagram DaoFlex Slide32:  DaoFlex Directory Structure Slide33:  ANT Process Based on DaoFlex Slide34:  public final List getEmployees(java.util.Date startDate) { String sql = "select * from employee where start_date < ? "; … conn = JDBCConnection.getConnection("jdbc/theriabook"); stmt = conn.prepareStatement(sql); stmt.setDate(1, DateTimeConversion.toSqlDate(startDate)); rs = stmt.executeQuery(); while( rs.next() ) { EmployeeDTO dto = new EmployeeDTO(); dto.EMP_FNAME = rs.getString("EMP_FNAME"); dto.SALARY = rs.getDouble("SALARY"); dto.START_DATE = DateTimeConversion.toUtilDate(rs.getDate("START_DATE")); list.add(dto); } return list; // … catch … finally } DaoFlex Generated Fill Method Slide35:  private void doUpdate_getEmployees(Connection conn, ChangeObject co) …{ StringBuffer sql = new StringBuffer("UPDATE EMPLOYEE SET "); String [] names = co.getChangedPropertyNames(); for (int ii=0; ii < names.length; ii++) { sql.append((ii!=0?", ":"") + names[ii] +" = ? "); } sql.append( " WHERE (EMP_ID=?)" ); stmt = conn.prepareStatement(sql.toString()); Map values = co.getChangedValues(); int ii=0; for (ii=0; ii < names.length; ii++) { stmt.setObject( ii+1, values.get(names[ii])); } ii++; stmt.setObject(ii++, co.getPreviousValue("EMP_ID")); if (stmt.executeUpdate()==0) throw new DataSyncException(co); } DaoFlex Generated doUpdate (Sync) Slide36:  private ChangeObject doCreate_getEmployees(Connection conn, ChangeObject co) throws … { PreparedStatement stmt = null; String sql = "INSERT INTO EMPLOYEE " + "(EMP_ID, …SALARY,START_DATE)"+ " values (?,…?,?)"; stmt = conn.prepareStatement(sql); EmployeeDTO item = (EmployeeDTO) co.getNewVersion(); stmt.setInt(1, item.EMP_ID); . . . stmt.setString(12, item.SS_NUMBER); if (Double.isNaN(item.SALARY)) stmt.setNull(13,Types.DOUBLE); else stmt.setDouble(13, item.SALARY); stmt.setDate(14, DateTimeConversion.toSqlDate(item.START_DATE)); . . . if (stmt.executeUpdate()==0) throw new DAOException("Failed inserting."); co.setNewVersion(item); return co; } DaoFlex Generated doCreate (Sync) Slide37:  public final List searchEmployees_sync(List items) { Connection conn = null; ChangeObject co = null; try { conn = JDBCConnection.getPooledConnection("jdbc/theriabook"); Iterator iterator = items.iterator(); while (iterator.hasNext() ) { // Do all deletes first co = (ChangeObject)iterator.next(); if(co.isDelete()) doDelete_searchEmployees(conn, co); } iterator = items.iterator(); while (iterator.hasNext()) { // Proceed to all updates next … iterator = items.iterator(); while (iterator.hasNext()) { // Finish with inserts … } catch … } finally { if( conn!=null ) JDBCConnection.releasePooledConnection(conn); } return items; } Generated Java DAO: Sync Method Slide38:  /* Generated by DAOFLEX Utility (JavaDTO.xsl) */ package com.theriabook.datasource.dto; public class EmployeeDTO implements Serializable{ private static final long serialVersionUID = 1L; public int EMP_ID; public String EMP_FNAME; public double SALARY; … public java.util.Date START_DATE; private String _uid; public EmployeeDTO() { _uid = UUIDGen.getUUID(); } public String getUid() { return _uid; } public void setUid(String value) { _uid = value; } } DaoFlex Generated Java DTO Slide39:  /* Generated by DAOFLEX Utility (ActionScriptDTO.xsl) */ package com.theriabook.datasource.dto{ [Managed] [RemoteClass(alias="com.theriabook.datasource.dto.EmployeeDTO")] public dynamic class EmployeeDTO { public var EMP_ID : Number; public var EMP_FNAME : String; . . . public var SALARY : Number; public var START_DATE : Date; . . . private var _uid:String; public function get uid():String { return _uid; } public function set uid(value:String):void {_uid = value; } public function EmployeeDTO() {_uid = UIDUtil.createUID(); } } //EmployeeDTO } DaoFlex Generated ActionScript DTO Slide40:  <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="onCreationComplete()"> <mx:DataService id="ds" destination="Employee" . . . /> <mx:Panel title="Employee::getEmployees()" > <mx:DataGrid id="dg" dataProvider="{collection}" editable="true" height="100%"> <mx:columns><mx:Array> <mx:DataGridColumn dataField="EMP_FNAME" headerText="Emp Fname" />. . . <mx:DataGridColumn dataField="SALARY" headerText="Salary" itemEditor="{numberEditor}" labelFunction="numberLabelFunction"/> </mx:Array></mx:columns> </mx:DataGrid> <mx:ControlBar><mx:Button label="Fill" click="fill_onClick()"/><mx:Button label="Delete" click="delete_onClick()" …. <mx:Button label="Commit" click="commit_onClick()“ enabled="{ds.commitRequired}"/> </mx:ControlBar> </mx:Panel> </mx:Application> Generated Test MXML Application Slide41:  DaoFlex in Action Slide42:  Java Assembler Remoting DAO classes Configuration XML files Report metadata for FlexBI Forms and Master/Detail Samples Project specific templates Wait, There is More… Slide43:  Rebuild DaoFlex from the source code: daoflex-runtime.jar & daoflex-generator.jar DaoFlex runtime - a tiny (13 Kb) JAR with a handful of simple classes DaoFlex Generator’s templates – external XSL files Customize existing templates and/or add your own to generate as per your project organization Extend standard metadata with custom tags Controlling DaoFlex Engaging DaoFlex in Reporting Systems:  Engaging DaoFlex in Reporting Systems RAD Approach: Provide visual development tools with full editing capabilities including, but not limited to drag-n-drop Put the end-user in the driver’s seat to extend the system Cut and Paste Approach (works for data entry as well): Copy generated code to the application Add business functionality on top Development cycle: standard incremental process of design, test, deployment FlexBI – Business Intelligence Tool:  FlexBI – Business Intelligence Tool C O S T O F O W N E R S H I P Native Flex approach for reporting solutions Eliminate the need to integrate and customize 3rd party BI packages Control performance and security issues Simplify deployment Support report personalization by the end user Key Ingredients of FlexBI:  Key Ingredients of FlexBI SuperGrid control, a custom extension of standard DataGrid Run-time use of MXML for VISUAL editing by the end-user Slide47:  SuperGrid In Action Slide48:  SuperGrid In Action Slide49:  SuperGrid: Business Domain MXML Automation of regular routine tasks: formatting New functionality: header/footer bands; formulas <fx:bandColumns><mx:Array> …. <fx:SuperGridColumn bandName="Header1" colId=“h1" headerText="Department:" /> <fx:SuperGridColumn bandName="Header1" colId="D1" dataField="DEPT_ID" fontWeight=“bold”/> <fx:SuperGridColumn bandName="Trailer1" colId=“st1" headerText="Sub-Total:" /> <fx:SuperGridColumn bandName="Trailer1" colId="S_T1" dataField="SALARY" boundTo="SALARY" format="currency“ formula=“{{SUM(’SALARY’,1)}}"/>…. </mx:Array></fx:bandColumns> <mx:columns><mx:Array> <mx:DataGridColumn colId="LNAME" dataField="LNAME" headerText="Name "/> … <mx:DataGridColumn colId="SALARY“ dataField="SALARY" /> <mx:DataGridColumn colId="BIRTH_DATE“ dataField="BIRTH_DATE" /> … </mx:Array></mx:columns> <fx:columns><mx:Array> <fx:SuperGridColumn colId="LNAME" dataField="LNAME" headerText="Name "/> … <fx:SuperGridColumn colId="SALARY“ dataField="SALARY" format="currency" /> <fx:SuperGridColumn colId="BIRTH_DATE“ dataField="BIRTH_DATE" format="shortdate" /> … </mx:Array></fx:columns> FlexBI Report Metadata - MXML:  FlexBI Report Metadata - MXML insert into COMPOSITIONLIST (description, columns, arguments, method, classname) values ( 'Template for Employee::getDepartments', '<fx:columns><mx:Array><fx:SuperGridColumn dataField="DEPT_ID" headerText="Dept Id" /></mx:Array>….</fx:columns>', null, 'getDepartments', 'com.theriabook.composition.Employee‘ ); Def: MXML of the Report persisted in the database Initially produced by DaoFlex as SQL INSERT statement Iteratively visually edited via FlexBI Designer Regular MXML: can be edited and standalone tested MXML-to-components serialization/de-serialization allows ad-hoc modification of the report by the end user (column list, grouping, sorting, formulas, etc.) FlexBI Reports Media and Performance:  FlexBI Reports Media and Performance For each report composition there is appropriate “editable” MXML stored in the database The end-user can interactively change layout, grouping, formulas, formatting, etc. The changes are applied as modifications to the original MXML and are stored in the database for future sessions There is also a set of SWF files to be used for high-performance “view” Slide52:  FlexBI Process Diagram User Machine FlexBI Designer Report Run-time J2EE Application Server with FDS SWF Executables Filters state=‘CA’ Formulas SUM(salary,1) Report <fx:SuperGrid/> Data Driven Programming:  Data Driven Programming Report MXML can be either compiled or interpreted on the client BY WHAT? Interpreting subset of MXML on the client is relatively inexpensive due to E4X support in the player Once MXML is processed, fully functional report is instantiated Slide54:  Grouping with SuperGrid <fx:groups><mx:Array> <fx:GroupSort level="1"> <fx:fields><mx:Array> <mx:SortField name="DEPT_ID" descending="false" numeric="true"/> </mx:Array></fx:fields> </fx:GroupSort> <fx:GroupSort level="2" ><fx:fields><mx:Array> <mx:SortField caseInsensitive="true" name="STATE" descending="false" /> </mx:Array></fx:fields></fx:GroupSort> </mx:Array></fx:groups> <fx:sort> … /fx:sort> Grouping as natural progression of standard Flex sorting Seamless integration of the concept in the underlying platform Slide55:  Grouping with SuperGrid Continued <fx:groups>…<fx:groups> <fx:sort> <mx:Sort> <mx:fields><mx:Array> <mx:SortField caseInsensitive="true" name="EMP_LNAME" descending="false" /> <mx:SortField caseInsensitive="true" name="EMP_FNAME" descending="false" /> </mx:Array></mx:fields> </mx:Sort> </fx:sort> “Inner” Sorting Slide56:  Providing developers and business analyst with common markup widgets to assemble applications Separate and hide programming implementation of common tasks, make them data driven Engage end-user in the application customization and personalization A real-world scenario – Reporting Application Business Analysts need high-level widgets understanding business functionality / no low-level coding Has to be customizable and extensible in almost real-time Has to support standard office integration and functions Developers (like us) want it to be: Easy to develop Easy to deploy Easy to maintain Should require very little testing Should be easy to turn to operations Customizable Report Designer:  Customizable Report Designer Base Interface for creating, extending and running dynamic reports Customizable set of painters and utility functions for reporting Built-in personalization layer Layout Designer:  Layout Designer Layout Designer:  Layout Designer Grouping Designer:  Grouping Designer Sorts data based on the grouping Adds customizable header and footer bands to each group Automatic calculation of the bands formulas Grouping Designer:  Grouping Designer Filter Designer:  Filter Designer Client-side data filtering, with automatic recalculation of the formulas Automatic generation and compilation of the filter expressions for better performance Filter Designer:  Filter Designer Filter: Behind the Scenes Web Tier Compilation:  Filter: Behind the Scenes Web Tier Compilation Data Sorting :  Data Sorting Applies sorting WITHIN groups Does not cause recalculations Slide66:  More SuperGrid MXML FlexBI Benefits:  FlexBI Benefits No builds for each additional report No need to change config files with extra remoting destinations No server stop/start after adding an additional report No large SWF files, no hundreds of small SWFs Complete personalization of reports by the end-user Complete control of the default enterprise formatting by the business analyst Complete automation of development and testing environments for developer Slide68:  Links Introduction into DaoFlex Introduction into FlexBI Q & A Downloads DaoFlex PojoFacade for remoting Contact Information vrasputnis@faratasystems.com yfain@faratasystems.com http://www.faratasystems.com

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