Spring Roo is an rapid application development tool that helps you in rapidly building spring-based enterprise applications in the java programming language. Google app engine is a cloud computing technology that lets you run your application on Google's infrastructure. Using Spring Roo, you can develop applications that can be deployed on the Google app engine. In this tutorial, we will develop a simple application that can run on the Google app engine. Roo configures and manages your application using the Roo shell. Roo shell can be launched as a stand-alone, command-line tool, or as a view pane in the Springsource tool suite ide. Create it Fast and Effectively Most who create applications want to make them fast, and they want to make them effectively. What this means is that if they can figure out a way to create something that will both work for their users and also provide them with the speed of transaction that they need, then it is entirely possible that this will be precisely what they need to do in order to get the best results. Most are looking to Google search as a great way to get their apps out into the world, and it seems like this is as good of a place as any to start. Pushing out apps that can help the general population get the help they need with various projects means working with the most popular search engines in the world to make it happen. Thus, you should look to develop apps that work on Google in order to get the kind of results that you require. Prerequisite Before we can start using the Roo shell, we need to download and install all prerequisites. Download and install SpringSource Tool Suite 2.3.3. m2. Spring Roo 1.1.0.m2 comes bundled with STS. While installing STS, the installer asks for the location where STS should be installed. in that directory, it will create a folder with the name "roo-%release_number%" which will contain roo stuff. add %spring_roo%/roo-1.1.0.m2/bin in your path so that when you can fire roo commands from the command line. Start STS and go to the dashboard (help->dashboard) Click on the extensions tab Install the "google plugin for eclipse" and the "datanucleus plugin". Restart STS when prompted. After installing all the above we can start building the application. Conferenceregistration.roo Application Conference registration is a simple application where speakers can register themselves and create a session they want to talk about. So, we will be having two entities: speaker and presentation. Follow the instructions to create the application: Open your operating system command-line shell Create a directory named conference-registration Go to the conference-registration directory in your command-line shell Fire Roo command. You will see a roo shell as shown below. Hint command gives you the next actions you can take to manage your application. Type the hint command and press enter. Roo will tell you that first you need to create a project and for creating a project you should type 'project' and then hit tab. Hint command is very useful as you don't have to cram all the commands; it will always give you the next logical steps that you can take at that point. Roo hint command told us that we have to create the project so type the project command as shown below project --toplevelpackage com.shekhar.conference.registration --java 6 This command created a new maven project with the top-level package name as com. Shekhar.conference.registration and created directories for storing source code and other resource files. In this command, we also specified that we are using Java version 6. Once you have created the project, type in the hint command again, Roo will tell you that now you have to set up the persistence. Type the following command persistence setup --provider datanucleus --database google_app_engine --applicationid roo-gae This command set up all the things required for persistence. It creates persistence.xml and adds all the dependencies required for persistence in pom.xml. We have chosen the provider as DataNucleus and the database as google_app_engine because we are developing our application for google app engine and it uses its own data store. Applicationid is also required when we deploy our application to the Google app engine. Now our persistence setup is completed. 8. Type the hint command again, Roo will tell you that you have to create entities now. so, we need to create our entities' speaker and presentation. To create a speaker entity, we will type the following commands entity --class ~.domain.speaker --testautomatically field string --fieldname fullname --notnull field string --fieldname email --notnull --regexp ^([0-9a-za-z]([-.\w]*[0-9a-za-z])*@([0-9a-za-z][-\w]*[0-9a-za-z]\.)+[a-za-z]{2,9})$ field string --fieldname city field date --fieldname birthdate --type java.util.date --notnull field string --fieldname bio The above six lines created an entity named session with different fields. In this, we have used notnull constraint, email regex validation, date field. Spring Roo on the app engine does not support enum and references yet which means that you can't define one-one or one-to-many relationships between entities yet. These capabilities are supported on spring MVC applications but spring MVC applications can't be deployed on app engines as of now. Spring Roo Jira has these issues. They will be fixed in future releases(hope so :) ). 9. Next create the second entity of our application presentation. To create a presentation entity type the following commands on Roo shell entity --class ~.domain.presentation --testautomatically field string --fieldname title --notnull field string --fieldname description --notnull field string --fieldname speaker --notnull The above four lines created a jpa entity called presentation, located in the domain sub-package, and added three fields -- title,description and speaker. As you can see, the speaker is added as a string (just enter the full name). Spring Roo on google app engine still does not support references. 10. Now that we have created our entities, we have to create the face of our application i.e. user interface. currently, only GWT-created UI runs on the app engine. so, we will create GWT user interface. To do that type gwt setup this command will add the GWT controller as well as all the UI required stuff. This command may take a couple of minutes if you don't have those dependencies in your maven repository. 11. Next you can configure the log4j to debug level using the following command logging setup --level debug 12. Quit the Roo shell 13. You can easily run your application locally if you have maven installed on your system, simply type "mvn gwt:run" at your command line shell while you are in the same directory in which you created the project. This will launch the GWT development mode and you can test your application. Please note that applications do not run in the Google chrome browser when you run from your development environment. So, better run it in firefox. 14. To deploy your application to the Google app engine just type mvn gwt:compile gae:deploy it will ask you for app engine credentials (email id and password).

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Use this guide to grab eclipse console output effortlessly. After reading it, you'll be able to grab eclipse console output successfully. But before we dive into it, let's start by answering this crucial question: What is the Console in Eclipse? The Console in Eclipse is what will enable you to view the output of the utilities invoked when building a project or the program's output when you run or debug running the application. Typically, you will follow these easy steps to view the output: Click Window > Preferences. Expand C/C++ and Build, then click Console. If you want to display information on the latest project only, use the "Always clear console before building check box" option. Optimize Each Line Of the Eclipse Output In your plugin, if you want to do something with each line of your eclipse output console, for example, write that line to a file or parse it before sending it to your custom eclipse view, you should create a class that implements IConsoleLineTracker, and you should add this extension point to your plugin.xml. [img_assist|nid=1032|title=|desc=The steps are explained well here...|link=none|align=none|width=256|height=192] Now, suppose your class implementing IConsoleLineTracker is this: public class LogTracker implements IConsoleLineTracker { private IConsole m_console; public void dispose() { } public void init(IConsole console) { m_console = console; } public void lineAppended(IRegion region) { try { String line = m_console.getDocument().get(region.getOffset(), region.getLength()); // DO SOMETHING WITH THAT LINE } catch (BadLocationException e) { WrCheck.logError(e); } } } Copy the console output in Eclipse The best method you can use to copy a console is to tell Eclipse to save console output to a file. To do this, you need to go to Run → Debug Configurations on the Eclipse menu. Once you Debug Configurations successfully, then navigate under the Standard Input and Output section, click on the checkbox next to File: and choose the name of the output file to use. Get the full Console in Eclipse Are you trying to get full console in Eclipse? The good news is it's possible to get it. All you need to do is go to Windows --> Preferences --> Run/Debug --> Console and then unchecking "Limit Console Output" which is ON by default. This works on STS any version too. This would help print complete console output. For a Mac, it is Eclipse > Preferences > Run/Debug > Console. View the console log in Eclipse If you want to view the console login to Eclipse: You need to go to Run -> Debug Configurations on the Eclipse menu. Then, under the "Standard Input and Output" section, Click on the checkbox next to "File:", and choose the name of the output file to use. If you check "Append" underneath, console output will be appended to the output file. How do I save data on the console? There will be times when you'll need to save data on the console. To do this, all you need to do is right-click > go to Save button, which is in the Console panel. It will allow you to save the logged messages to a file. In a situation where you have an object logged, then you can use the following steps: Right-click on the object on the console and click Store as a global variable. The output will be visible as "temp1.type in console". Copy (temp1), And paste it to your favorite text editor Install a detached console in Eclipse Want to attach the console to the main eclipse window? Follow these easy steps: Click Window->Perspective-> then go to Reset Perspective to detach it. EFCARDZ TREND REPORTS WEBINARS ZONES DZone > Performance Zone > Remotely Debugging an Eclipse Plugin Upgrade Eclipse Follow the instructions below to upgrade Eclipse: On the toolbar, navigate to Window > Install New Software. Click on Add and add the following URL for the latest build of Eclipse: https://download.eclipse.org/releases/latest. Alternatively, you could add the specific build of Eclipse you want from https://download.eclipse.org/releases/ such as: https://download.eclipse.org/releases/photon/ or go to https://download.eclipse.org/releases/2019-09/. Once the site is added to Eclipse, you can now proceed with the upgrade by navigating to Window > Help > Check for Updates. This basically goes through all the sites under Window > Preferences > Install/Update > Available Software Sites and gathers updated details from the ones that are selected. You should be able to see a pop-up listing the various plugins/tools that require an update. You have the option to select the ones that you need, or you can leave them as is. Then, click Next. Click Next after reviewing the details. You should now see the review license page. Click on the radio button "I accept ...." and click Finish. Remotely Debugging an Eclipse Plugin The Eclipse plugin can be debugged from inside the IDE while in the development phase, but once the plugin is installed in the IDE, we need to debug it remotely for bug resolution. In this quick tutorial, I'm going to explain how to debug an Eclipse plugin remotely. Plugin Project Let's suppose we have developed our simple Hello World plugin and installed it in our IDE. Now, to debug the plugin remotely, please follow the steps below. Step 1 Open the first instance of Eclipse IDE pointing to the workspace where your Hello World plugin project is located. Step 2 Navigate to the eclipse.ini file of your IDE. Here is a screenshot of the location of the file in macOS. Now add the following JVM arguments to the file: 1 -vmargs 2 -Xdebug 3 -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=1044 Step 3 Now, open another instance of the Eclipse IDE (on macOS, use the command open -a -n Eclipse in the terminal). This instance will point to a workspace different from the one which contains the Hello World plugin project. Step 4 Now, in the workspace containing the Hello World plugin project, make the following remote debug configurations/; Navigate Run -> Debug Configurations -> Remote Java Application. Then hit the debug button. Also, do not forget to put break-points in the code of the Hello World plugin to be debugged. Step 5 In the other workspace (which does not contain the Hello World plugin), try to use the Hello World plugin and it will be remotely debugged in the other instance of Eclipse. Conclusion There are Eclipse-based IDEs that have a powerful feature to make ‘variants’ of the same projects. Use the to Build Configurations, which are a powerful feature in Eclipse. They will allow you to make ‘variants’ of a project. The project will share the common things, and you can simply tweak things one way or the other for example to produce a ‘release’ or a ‘debug’ binary of my application without duplicating the project.

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Animation Brings a Whole New World to Life Where would we be without animators helping us see the world in a whole new light? It seems that we easily forget the hard work that these people do, and that is truly a tragedy. There are so many people helping us see the world for the way that it truly is, and we should be thankful and respectful of the hard work that they are doing. That is why we also have to ask ourselves if we should be using CSS3 Transitions or jQuery Animate when looking for the right program to do our animation work in. You might think that animation is just something used to create children's movies and television shows, but that isn’t quite right. It has a wide range of uses in our world today (more on this later), and we are increasingly coming to rely on it to make critical decisions about how we move forward on some of the most important decisions that we have to make to keep our world moving forward the way that we want it to. Take some time to step back and recognize all that animation has brought us, and this will help you better understand why there are a lot of people who are pushing to figure out which software programs can bring them the best animation outcomes. Rich Bradshaw has written a detailed tutorial series on CSS Transitions, Transforms, and Animation. That alone is worth reading; but in case you weren't convinced, Rich also put together a little (and maybe a little unfair) performance comparison: A head to head comparison of CSS transitions and jQuery's animate. Rather than setting a timer to run repeatedly, transitions are handled natively by the browser. In my rather unscientific testing, transitions are always quicker, running with a higher frame rate, especially with high numbers of elements. They also have the advantage that colours can be animated easily, rather than having to rely on plugins. Putting it All to the Test The best way to compare the two programs against one another is to put them through a series of simulated tests that allow each program to prove what it has going for it. Believe it or not, that is exactly what some people have done. They work with the two programs to see how they adapt and react when put under various testing conditions. By doing exactly that, the programs must prove themselves in the sense that they are forced to show that they can keep up with rapid changes and shifts in the dynamics of the work thrown at them. These tests can all be sped up by using computer simulations to run the tests instead of putting actual work done by a human being through the testing period. You will find that there is a lot to be gained by going through all of this and figuring out just how much each system can potentially get through. You don't want to use something that is sub-par compared to the other programs on offer out there, and that is why we are all so grateful that there are people who are willing to work with both programs to test them and see what the ultimate outcome really is for each. Unsurprising Results You should not be shocked to learn that CSS3 Transitions is the better program to use. It has a more seamless transition from image to image, and the speed with which it can process all of that data is truly amazing as well. The fact that there are multiple programs available for us to choose from is a great thing, but there is really no competition between CSS3 Transitions and jQuery Animate. The CSS3 Transitions program has been around for a lot longer, and it has the ability to get results from its users much more easily. The results probably won't surprise you, and the conclusion is inevitable ('use CSS3 for animation when you can') but Rich's analysis (scroll down), using the Timeline view in the Webkit Inspector, is pretty neat: (Actually, the Timeline is pretty neat, period. I didn't know about it until now..sweet.) So check out Rich's test and performance discussion, and maybe use Webkit Inspector's Timeline for performance fine-tuning in the future. Animation Into the Future The tools that are used in the world of animation are going to continue to be called upon to help creators do the challenging work that they do. The demand for animated films and television series has not ceased, but the usefulness of animation goes far beyond being entertained. There are uses for animation in simulations of all kinds. Even the military uses animation to simulate certain battlefield conditions and other concerns that they know are relevant to their operations. It is something that has helped them sort out how they can best move forward with their plan of action whenever the need arises. Put another way, the military uses animation to make sure they are never caught off guard. Courtrooms are seeing an increasing amount of animation used in presentations put on both by prosecutors and defense counsel alike. They make reenactments of various aspects of an alleged crime using animation to help a jury see how they claim that things happened from their point of view. There are a lot of reasons why this helps juries to understand their point of view more completely. CSS3 technology is helping to make the use of animation more widespread and available to a larger number of people across all walks of life. It appears likely that this trend will continue, and there are many people who are counting on using CSS3 technology for several projects that they have in the works at this time. We should all celebrate the fact that such technology is making animation more accessible. Using the Best Programs Doesn’t Have to Be Costly One more thing to keep in mind when you look for the best programs for animation purposes is this: They don’t have to be costly. Many programs are free and/or open-source. Even the ones that you have to pay for aren’t necessarily wildly expensive. They provide a huge ROI when you put them to use, and that alone should get you to understand why they are so important to use. Make sure you consider this and consider the options that are before you when it comes to selecting an animation program that will do the work you need it to do. The last thing in the world that you want to have to happen is to produce lower-quality animation just because you insisted on trying to save a few dollars by going with a less expensive animation program.

While a lot of databases have been created listing information in a table format, the web isn't set up in a tabular style. Neither is plenty of data in a variety of formats that the web uses. However, many databases are still using tables, because many web developers feel that tables handle plenty of data better than any other structure. Others feel that the data tables known as RDB should be converted to RDF, a format used to gather an even wider array of metadata across the worldwide web. The ability to convert to RDF will be extremely beneficial as technology advances to Artificial Intelligence AI and beyond. What is an RDB? RDB stands for a Relational Database. An RDB is a collective set of multiple data sets organized by tables, columns, or records. An RDB establishes a well-defined relationship between database tables. The tables communicate to share information that makes it possible to search for data, organize, and report. RDB is derived from the mathematical function concept of mapping data sets as developed by Edgar R. Codd. RDBs use Structured Query Language, SQL.SQL is a standard user application that provides an easy programming interface for database interaction. RDBs organize data with each table known as a relation which contains columns. Each table row, or record, contains a unique data instance defined for a corresponding column category. The data and record characteristics relate to at least one record to form functional dependencies. RDB performs "select", "project" and "join" database operations, where select is used for data retrieval, identifying data attributes, and combining relations. Those who prefer to use RDBs do so because of the advantages, including easy extensibility or scalability, new technology performance, and data security. What is RDF? RDF is primarily used to provide information or metadata for data available on the Internet. RDF provides the methodology for specifying, structuring, and transferring metadata, and provides the basic XML syntax for software applications to exchange or use that information. The URI/URL provides the location of that data. RDF stands for Resource Description Framework and is a standard for describing web resources and data interchange, developed and standardized by the World Wide Web Consortium, W3C with Xtensible Markup Language (XML) and Uniform Resource Identifier (URI) serving as its distribution standards. Typically, RDF provides basic information and attributes about an Internet-based object, such as the name of the author, Web page keywords, object creation or editing data, or the sitemap. While there are many conventional tools for dealing with data and more specifically for dealing with the relationships between data, RDF is the easiest, most expressive, and most powerful standard to date. The overall informational value is much greater because context or intent can be inferred. RDF presents small chunks of information in a form that infers meaning. This can include rules about how the data should be interpreted. Resource Description Framework, RDF, is the standard for encoding metadata and other structured information on the Semantic Web. Semanticization Data With all the semantic standards and database-centered HTML5 APIs and a W3C standard that calls for implementations, this is an exciting time for data on the web. It's time to embrace RDF with the capacity to start pulling relational data into the semantic web! The Purpose of RDBMS The software used to store, manage, query, and retrieve data stored in a relational database is called a Relational Database Management System, or RDBMS. The RDBMS provides an interface between users and applications with the database. It also provides administrative functions for managing data storage, performance, and access. Semanticization, or giving meaning to, all data can be done in two stages. First, construct a web of meanings, not documents -- as Sir Tim Berners-Lee has always wanted, and as the RDF, Resource Description Framework seeks to do. Second, fit all tabular data into the web whether legitimately or not. This second step is less exciting than the first because plenty of tabular data is not ideally tabular. In these cases, the second step is rather backward-looking. However, it is no less necessary than the first for two reasons: Converting everything RDBMS to RDF is not even close to worth it Much data ought not to be converted to RDF All of this data still needs to talk to the web, which means it needs to be translated into a webby structure, ideally RDF. The easiest way to translate without conversion is, of course, just plain mapping. But mapping two rather different structures to one another is no small undertaking or trivial task. That's why there's a whole W3C Working Group devoted to devising a mapping language and actual mapping of relational data to RDF. Sir Tim offers this insight into the RDF-RDBMS relation, cutting through questions that might otherwise be couched in domain-inappropriate terms (like 'is the RDF model an entity-relationship model'): Relational database systems manage RDF data, but in a specialized way. In a table, there are many records with the same set of properties. An individual cell (which corresponds to an RDF property) is not often thought of on its own. SQL queries can join tables and extract data from tables, and the result is generally a table. So, the practical use for which RDB software is used is typically optimized for doing operations with a small number of tables, some of which may have a large number of elements. Because relational databases are species of the genus described by RDF, the basic mapping model is as follows: a record is an RDF node; the field (column) name is RDF propertyType; and the record field (table cell) is a value. So far, so straightforward. Of course, the implementations usually wander pretty far from the original concept. That's why mapping actual RDBMS to RDF takes a bit of dirty work. RDB2RDF Enter RDB2RDF. The RDB2RDF WG is doing the dirty work. Back in 2005, when the Group was still an Incubator, they published a detailed survey of then-current approaches to mapping relational databases to RDF. This survey served as the starting point for typically extensive discussion and debate, which culminated in two Candidate Recommendations: The RDB to RDF mapping language: R2RML The Relational-to-RDF mapping itself Many techniques and tools have been proposed to enable the publication of relational data on the web in RDF. RDB-to-RDF methods are one of the keys to populating the web of data by unlocking the huge amount of data stored in relational databases. Since producing RDF data with sufficiently rich semantics is often important in order to make the data usable, interoperable and linkable, there are various strategies developed to enrich data semantics. Turning RDB to RDF has proven to be of value when dealing with SQL databases. It offers a straightforward and practical system for relational database conversion into RDF. RDB2RDF and the Future Moving forward beyond RDB-to-RDF methods, it will become necessary to find a compromise between the expressiveness of RDB to RDF mapping languages and the need for updating relational data using protocols of the semantic web. Creating, updating, and deleting RDF data should only be made possible in a secure, reliable, trustworthy, and scalable way.

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