Shay Shmeltzer

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Updated: 16 hours 19 min ago

Introduction to Liquibase and Managing Your Database Source Code

Mon, 2017-10-16 10:35

In previous posts I showed how you can manage SQL scripts lifecycle with the help of Oracle Developer Cloud Service (DevCS) as part of an overall Oracle DB DevOps solution. I wanted to add one more utility that might act as an alternative or addition to the SQL script managing - Liquibase.

Liquibase logo

Liquibase is an open source solution for managing revisions of your databse schema scripts. It works across various types of databases, and supports various file formats for defining the DB structure. The feature that is probably most attractive in Liquibase is its ability to roll changes back and forward from a specific point - saving you from the need to know what was the last change/script you ran on a specific DB instance.

Liquibase uses scripts - referred to as "changesets" - to manage the changes you do to your DB. The changesets files can be in various formats including XML, JSON, YAML, and SQL. In the examples below I'm using the XML format.

As you continue to change an enhance your DB structure through the development lifecycle you'll add more changesets. A master file lists all the changeset files (or the directories where they are). In parallel Liquibase tracks in your database which changesets have already run. 

When you issue a liquibase update command, liquibase looks at the current state of your DB, and identifies which changes have already happened. Then it run the rest of the changes - getting you to the latest revision of the structure you are defining.

By integrating Liquibase into your overall code version management system and continuous integration platform you can synch up your database versions with your app version. In my case this would of course mean integration with Oracle Developer Cloud Service (DevCS) - which you get for free with the Oracle Database Cloud Service. In the video below I show a flow that covers:

  • Tracking my DBA tasks in the issue system
  • Modifying a local MySQL DB with Liquibase (doing forward and backward rolls)
  • Adding a change set defining a new table
  • Committing to Git
  • Automatic build implementing the changes in Oracle Database Cloud Service
  • Automatic testing with UT/PLSQL

Here is a quick 10 minute demo:

For those who want to try and replicate this, here are some resources:

A changeset that creates a "department" table with three columns:

A changeset that creates PL/SQL function, package and procedure. Note that in line 3 the dbms="oracle" means this script will only run when we are connected to an Oracle DB:

create or replace function betwnstr( a_string varchar2, a_start_pos integer, a_end_pos integer ) return varchar2 is begin return substr( a_string, a_start_pos, a_end_pos - a_start_pos+1 ); end; create or replace package test_betwnstr as -- %suite(Between string function) -- %test(Returns substring from start position to end position) procedure basic_usage; end; create or replace package body test_betwnstr as procedure basic_usage is begin ut.expect( betwnstr( '1234567', 2, 5 ) ).to_equal('2345'); end; end; A changeset that adds a record to a table. Line 8 has the rollback tag that defines how to do a rollback for this insert: delete from department where id=20

 

A few tips about my DevCS project and build setup.

1. For the sake of simplicity, I loaded the liquibase and JDBC jar files into my git repository - this makes it easy for my build steps to find the files and execute them. I'm guessing you could also use Maven to host those.

2. I use a password parameter for my build so I don't need to hardcode the password adding a bit of security to my build. Reference teh parameter in your build with a $ sign - $password

3. Want to learn more about test automation with ut/PLSQL - check out this blog entry.

 

 

Categories: Development

Creating Custom Search/Query Pages with Visual Builder

Fri, 2017-09-15 10:39

There is built in functionality in Visual Builder Cloud Service (VBCS) that will let you attach an advanced filter to any table. This will give you the ability to define complex searches.

However, sometime people would want to create their own custom query pages. For example the default filter for a field searches for a letter in any place in the field - and maybe you just want to search for the first letter. Or maybe you want to display a nice selection list for filtering. There is a little trick that will let you achieve this, and I show it in the video:

The basic steps involve creating a new edit page with a new dummy business object. Then you add a table that is based on the real business object (the one with the data), and hook up the query of this table to the values of fields from the dummy business object. Then you add a button to do a "fetch all" on the table, and you are done.

At the end of the video you'll also see how to hook this page into your main menu.

Categories: Development

A Guide to Attending Oracle OpenWorld and JavaOne for Free

Thu, 2017-09-14 11:32

This title seems like a click bait, but I'll try and show you that this is actually possible. (Especially if you act fast).

A pass to both conferences is not a cheap item, and with training budgets shrinking you might be running into problems getting approval to expense this to your company. But here are a couple of tricks you can use to get free access to OOW/JavaOne. Some would get you a full pass and some will get you into specific areas and sessions.

Full Pass

Be a Speaker

Well we are a bit late to the call for papers at this point, but you might still be able to become a co-speaker if you have a good customer story to tell that shows how you are using the product/technology that a talk is about. Oracle is always looking to feature customer stories in our sessions - it is always better when a customer shares their real live success. Look up the content catalog and locate sessions on products that you are successfully implementing - ping the speaker and they might want to add you as a co-speaker.

Apply for the Oracle Excellence Awards

We are late for getting in this year, but keep an eye for this for next year. Winners get a free pass to OOW. Details here.

JavaOne Special Discount

Right now you can get 50% off your JavaOne ticket price if you use this code DJFS2017. Register here https://www.oracle.com/javaone/register.html

Other Passes

So full pass might be hard to get for free, but you can get in on a big chunk of the action for free using 

The Discoverer pass

A Discoverer pass lets you into the exhibit halls and various keynotes. Getting into the exhibit hall is great if you want to meet product managers and learn about the latest versions (and upcoming versions too). Most of the PMs are going to do shifts at the Oracle Demoground in their product pods - so hang out there and you'll be able to chat with us.

Usually a Discoverer pass is $75 - but since you are reading this blog, you can get one for free - use the code CDFR2017. Register here.

Oracle Code

Want to get into some technical sessions - this year we are bringing Oracle Code back to San Francisco during OOW - and you can get into this part of the conference for free. Reg here:

https://developer.oracle.com/code/sanfrancisco-oct-2017

See you at the conference in a couple of weeks.

 

 

 

Categories: Development

Sending Emails from Visual Builder Cloud Service

Mon, 2017-09-11 12:23

Sending emails as a result of some changes to data is a common requirement we've been hearing from customers of Oracle Visual Builder Cloud Service (VBCS). In previous versions we already added a function that allows you to fire up the client email software from your app. In the new version we rolled out a couple of weeks ago we added a new function that can manage the whole email processing inside VBCS - on the backend/server/cloud side.

When you define a new trigger on a business object you now have the option to add "send email notification" step to your logic flow. 

When you are defining this, you'll be able to pick or define a template for your email. The email template can have parameters to increase reusability. These parameters can then have their value set from expressions that can include values of fields from your objects.

Here is a complete demo video that shows you how to add an email notification to an event on your business object:

Categories: Development

Advanced Code Search for Git in Oracle Developer Cloud Service

Mon, 2017-07-10 07:11

One of the new features introduced in a recent monthly update of Oracle Developer Cloud Service is the advanced code search box you can see at the top right when you look at your Git repositories. This is a separate search functionality from the regular project artifacts search the box does in the other section of DevCS.

search screen

This search functionality is language aware, supporting a variety of languages including Java, JavaScript, HTML and CSS. It scans and indexes your code to understand its structure. DevCS can then do context aware searches for objects in your code, providing you autosuggest and even supporting camelCasing in the search box.

In the short video below I show you how this works. I start by importing code from a random github project into DevCS - and then I perform a search and show you how to find out the files, lines of code & revision references to your search term. You'll also see how code navigation works in the browser.

For more information about this capability have a look at the documentation here.

 

Categories: Development

How Do I Start Learning Oracle ADF - The 12c Edition

Fri, 2017-06-30 17:42

The most popular blog entry on my blog has been the "How do I start Learning ADF" entry for years now. That entry however was last updated in 2012 (and written in 2010) - so I figured it is time to give it another update, point to more recent resources, fix broken links, and cover additional resources that appeared over the years.

So here is the ADF 12c version of that blog entry updated for 2017:

Get started with Oracle ADF in 6 steps

Step 1 - Learn Basic Java

Oracle ADF aims to reduce the amount of coding you need to do for a lot of the tasks you'll need for building an application, and if you follow some of the tutorials mentioned later you'll see how you can build advanced apps without coding. But, at the end of the day, you will write code when developing with ADF - and that code would be written in Java. You don't have to be a Java ninja to work in ADF, but you should be familiar with basic language concepts and constructs.

There are lots of resources out there that will teach you the language (by the way if you are on ADF 12.2.* you should learn the Java/JDK 8 syntax), one option is the Oracle Java Tutorials path. Searching online you'll be able to find many other resources for this task. Since Oracle ADF is based on Java EE architecture - you might want to also get a bit of understanding of that architecture - but don't worry about learning all of Java EE in details - ADF will make it much simpler for you.

While learning the language you should be practicing it with the development tool that you are going to use, if you are going to developer Oracle ADF applications then that tool will be Oracle JDeveloper. Get yourself familiar with the basic IDE features for coders by running through this IDE tutorial.

Step 2 - Get started with Oracle ADF

Now that you know the basics of the Java language (and maybe some Java EE concepts), it's time to start using the framework that will simplify your life. Start by reading the data sheet and technical paper to understand what ADF is all about.

Now get your hands dirty by completing the Overview tutorial for Oracle ADF - this will take you a couple of hours but by the end of it you'll have built a full blown application, and you will touch on most of the parts of the Oracle ADF architecture.

Two other tutorials you should do next will deepen your knowledge about the Oracle ADF Controller Layer and taskflows, and the Oracle ADF Faces UI layer. If you got more time, have a run through other tutorials from our site.

Step 3 - Getting Educated

Now that you have hands-on experience with Oracle ADF, it would be a good point to go and get some deeper knowledge about how the framework works. You can leverage the collection of free online lessons we recorded in the ADF Essentials channel. You don't have to watch all the videos, but I would definitely recommend that at a minimum you'll watch the overview, ADF business components, ADF Controller (both parts) and ADF Faces video. And then you must watch the video about the ADF bindings internal seminars (2 parts) - these are critical for you to understand the inner working of the ADF "magic layer" that makes development so simple. 

By the way if you prefer to get knowledge through live or online instructor-lead courses or by reading books - we have those too - see the list here.

Step 4 - RTFM

Ok, now you have a good grasp of the framework and how it works, it might be a good time to read the manual for Oracle ADF - "Developing Fusion Web Applications with Oracle Application Development Framework". This is the complete guide and you should read it to get more insight into the framework, best practices, and general guidelines. Note that the ADF documentation libraries has additional books about ADF Faces, ADF Desktop Integration, Administration guides and more.

Step 5 - Become an ADF Architect

Now that you know how to build ADF apps, it's time to learn how to architect more complex projects and work in a team environment. The resource to learn from is the ADF Architecture Square - where we discuss best practices, development guidelines, and most importantly how to architect a complete complex application. Here you can find docs and also a link to a set of videos on the ADF Architecture Square YouTube Channel. If you only have time to watch one video from that channel - go for the "Angels in the ADF Architecture". By the way, if you are looking for a platform for your team to collaborate on while building Oracle ADF applications - check out the Oracle Developer Cloud Service and the integration it provides with JDeveloper.

Step 6 - Join the Community

As you continue on your development road, there will be times when you'll want to know "How do I do X?" or "Why do I get this error?". The nice thing is that since many other developers are working with ADF, you can leverage their collective knowledge. Got a question - type it into google and it is likely that you'll find blog entries and youtube videos that explain how to solve your issue.

A great place to search for answers is the indexed collection of ADF and JDeveloper blog articles. Search by keywords or topics and you'll likely get great samples to help you achieve your task.

Still can't find the answer? Ask your question on our ADF community forum, just don't forget to follow the basic rules of asking questions on the forum.

Things keep evolving in the world of Oracle ADF, so to keep up to speed you should follow JDeveloper on Twitter for the latest news.

Over the years Oracle ADF has proven itself to be a great framework for enterprise applications, and each new release introduced further capabilities and simplifications - If you are just now joining the world of Oracle ADF you are in for a great ride. Have fun.

Categories: Development

Extending Oracle Database DevOps with Automated PL/SQL Unit Testing

Mon, 2017-06-05 14:57
 
Automated testing helps you locate problems earlier in the development cycle saving you precious time down the road. This is why it should be a key part of any DevOps cycle - and your database code shouldn't be an exception to this rule.This blog entry will teach you how to execute tests automatically following code changes that you do in your Oracle database.
 
In previous blog entires I showed you how to use Oracle Developer Cloud Service (DevCS for short) for database development including how to track and manage tasks, version code changes, conduct code reviews, and automate code deployment to the database. This blog adds one more step to this lifecycle - automated testing.
 
For PL/SQL testing I'm using the open-source utPLSQL unit testing solution. The team behind this project just released a completely re-written version of the framework with features that allow you to add PL/SQL testing to continuous integration processes.

A full explanation of utPLSQL is outside of the scope of this blog (They have decent documentation to get you started). But in short, the concept is that you write PL/SQL procedures that test other procedures. The framework includes functions you invoke from your test functions to evaluate results as well as annotations that deliver meaningful messages and information when reporting test results. The utPLSQL utility is comprised of a set of database objects that you install in a new schema, and then you use their ut.run() procedure to execute test cases.

One nice feature built into the framework is the ability to produce test result reports in a format that is compatible with regular JUnit tests. With this functionality, I was able to get Developer Cloud Service to show me the test results nicely. Further more the built in support of DevCS for the SQLcl commands, made it simple to integrate the PL/SQL based framework as part of a generic build process without the need to install anything else on my continuous integration server.

Here is a quick video showing you the result and the configuration needed.
In the video I show how a check in of a PL/SQL script into the Git repository triggers a chain of events that ends with publishing test results. If the test fails the build is marked as failed - which can trigger an email being sent to you notifying you each time someone broke your code.
 
 
Some tips for configuration of such a chain:

My build pipeline has two jobs. The first one runs the SQL scripts in the database. This job is triggered by any change made to my Git repository. So when I update my git repository with a SQL script that has a new definition of a database object, the build immediately takes it and updates the definition in my development or QA database.
Once this build job finishes, it queues up the next job - the unit testing job.

The unit testing job is using SQLcl to run the following commands:

set serveroutput on;
set feedback off;
spool /workspace_directory/results.xml;
exec ut.run(ut_xunit_reporter());
spool off;

I spool the results of the test run into an xml file that I keep in the workspace directory for my job. (You can find out this directory by adding a shell command build step that does echo $WORKSPACE - an environment variable on the build server). Then I execute the ut.run procedure with the parameter that tells it to output the results as XUnit/JUnit format - doc on this option here. I turn serverouput on to get the results to show, and I turn feedback off to hide the message that the procedure successfully completed.

In the post build step I archive the results.xml file, and then I indicate that I want to publish the content of this file as test results.
 
Post Build Step

When your build finishes you'll see your build status visually and you can then drill down to see specific tests status.
Notice that you can also ask to be notified by email on the results of the build (the CC Me button).
 
 
Click on a specific run of a job to drill down into the test results
 
Test Summary
And click on a specific test suite to get the details of each test

Test Results Report

That's it. You now have a complete chain that will notify you the minute that a database change someone did breaks any tests, helping you deliver better code faster.
Categories: Development

Automating Processes With Application Builder and Process Cloud Services

Tue, 2017-05-30 18:33

Oracle Application Builder Cloud Service (ABCS) gives you a great way to build apps that track data, but what if your data is also involved in processes? What if you need to automate not just the data collection but also the human workflow interactions? The new integration between Oracle ABCS and Oracle Process Cloud Service (PCS) enables you to achieve this easily.

You can now create processes that are associated with ABCS business objects and interact with them directly from your Oracle ABCS user interfaces. This is a two way interaction patterns, where PCS processes can access information from Oracle ABCS business objects, and ABCS user interfaces can be created on top of these PCS processes to initiate and progress processes.

PCS integration in ABCS

In the video example below I'm developing a basic approval flow for travel requests. The video will show you how the integration works covering:

  • Associating a process with a business object
  • Accessing the business object values from your process
  • Setting security and connection between PCS and ABCS
  • Initiating PCS processes from an ABCS page
  • Creating custom to-do list pages in ABCS to show you your tasks
  • Creating custom task details pages in ABCS to progress tasks

As you'll see, all of these are quite simple and completely declarative to achieve with the visual development approach.

The combination of the products provide great value to the users of each one of those. PCS customers will love the ability to persist the data they use in their processes, and the ability to design even richer interfaces and reports. ABCS users will love the ability to automate and manage long running complex processes. 

 

 

 

Categories: Development

Leveraging Oracle JET Composite Components in Oracle application Builder Cloud Service

Mon, 2017-05-15 16:17

One of the new features of Oracle Application Builder Cloud Service (ABCS) in the May 2017 release is integration with Oracle JET's Composite Components Architecture (JET CCA).

Based on the Web Components standard, JET CCA provides a way to define reusable UI components (with logic) that can easily be incorporated into multiple applications.

The new feature in ABCS allows you to pick such components as extensions to the ABCS design time, providing an easy standard way to extend your UI capabilities. For example in the screenshot below you see a new slider component in the common components section, and how it looks like when added to the visual designer.

ABCS Design Time
 

In this blog entry we'll start by creating a very simple JET CCA component and then see how to add it to Oracle ABCS. (Thanks goes to John Brock who helped get this sample working).

To learn more about JET CCA have a look at their developer guide, and the sample in the Oracle JET Cookbook. We are going to start from that sample and build a very basic component. (For a deep guided tour of Oracle JET CCA check out Duncan's series of JET CCA blogs)

There are 5 files needed to define a component.

5 files in a directory

We'll start with the loader.js file - this file provides info on the other files involved in the component. Note that in the sample we are registering "slider" as the name of the component, in this file we are also indicating which jet components we are going to use and including them in the define section. Specifically we are adding the ojs/ojslider component here.

define(['ojs/ojcore', 'text!./demo-cca.html', './demo-cca', 'text!./component.json', 'css!./demo-cca','ojs/ojcomposite', 'ojs/ojslider'], function(oj, view, viewModel, metadata) { oj.Composite.register('slider', { view: {inline: view}, viewModel: {inline: viewModel}, metadata: {inline: JSON.parse(metadata)} }); } );

The next file we'll create is the component.json file. This file describes the meta data about our component. One of the key things you can define here is a set of properties that users of the components can set when they add it to their application. The nice thing in the ABCS integration is that these will show up at design time as properties in the visual editor.

In our component we are defining four properties that control the title, minimum, maximum, and actual value of a slider. Note that right now ABCS is using Oracle JET 2.3 and we need to specify this in the file.

{ "name": "Slider", "description": "A sample Oracle JET Slider CCA", "version": "1.0.0", "jetVersion": ">=2.3.0", "properties": { "title": { "description": "Name of slider", "type": "string" }, "min": { "description": "Numeric minimum", "type": "number" }, "max": { "description": "Numeric maximum", "type": "number" }, "value": { "description": "Slider value", "type": "number" } } }

Next we'll define the html file (demo-cca.html) that includes our UI. We are using regular HTML code here along with knockout.js binding of properties to values. You can use the $props prefix to refer to values of attributes we defined in the components.json file.

<div data-bind="text: 'Title: '+$props.title"></div>
  <input id="slider-id"
     data-bind="ojComponent: {
            component: 'ojSlider',
            max:$props.max,
            min:$props.min,
            step:10,
            value:$props.value
            }"/>
             

Next there is a css file - controlling the look and feel of the component. Since we are not doing any customization on the look and feel we'll create an empty file called demo-cca.css.

Next is the model file (demo-cca.js) - this file contains data and logic that can be accessed from the component. We'll create a basic file without any logic code in it.

define(['knockout'], function (ko) { function model(context) { var self = this; return model; } } )

Now that you have created the 5 files - simply zip them into a single zip file. This zip file is the file you'll give to your component users. In this case to the ABCS developer.


Go into your Application Settings -> Extensions in Oracle ABCS and choose to create a new UI component from zip file. Upload the zip file you just created. Then make sure to enable the component using the boolean control on the page.

Component extension

Switch over to the UI Designer and you'll see that there is a new component in the component palette.
Drag and drop it into your page - and you'll see the HTML code. Set the properties in the property inspector and you'll see them influencing the content of your page.
You can also bind the properties to the values of fields in your custom business objects.

Here is a quick video showing the integration.

 

Categories: Development

Getting Data from REST Services into Oracle Application Builder Cloud Service

Fri, 2017-05-12 11:09

In the latest version of Oracle Application Builder Cloud Service (ABCS) that we rolled out at the beginning of May we introduced a set of new code templates for creating Business Object Providers.

BOP templates screen

Business Object Providers - or BOPs for short - are a mechanism that allow you to extend ABCS and have it access external REST sources of data. In the video below I'm going to show you how to use the most basic template provided for BOPs - which allows you to create a read only BOP.

The template has 2 files that you need to change - one (RESTOperationProvider.js) that has the code for accessing the REST service and reading the results, and the other (RESTEntityProvider.js) has the code that defines the structure of the object you are creating.

In the video I'm using this URL - https://api.github.com/users/Oracle/repos - that gets you a list of projects/repositories that Oracle owns on Github:

Once you created a BOP you can add a new "external service" to your application in the data designer, and then you can use that object like you would any other.

Check it out:

 

Categories: Development

Passing Business Object Values to Custom UI Components in ABCS

Mon, 2017-05-08 18:54

This quick one is based on a customer question about Oracle Application Builder Cloud Service. The scenario is that we have a business object that has a field that contains the URL to an image. We want to be able to show that image on a page in Oracle Application Builder Cloud Service.

Image showing up

To do that I add a custom UI component object to the details (or edit) page of a record - then I switched the HTML of that object to be: <img id="logoimg"/>

custom code

 

I then added a button to the page and added a bit of custom JavaScript code in its action as follow:

var img = document.getElementById('logoimg'); img.src=$Company.getValue('Logo'); resolve();

This code simply locates the custom object on the page using the object id and then sets the src property of the img html tag to match the value of the field in the business object.

Code in Button

 

 

Categories: Development

I'm On a New Blog Platform!

Fri, 2017-05-05 12:15

This happens every several years, our blogging platform at Oracle is switching to a new environment, and my blog is one of those moving. In the next few days I'll be testing to see if content migration did its magic and everything works.

If you run into any broken entries/links/samples please drop me a line or just comment on the specific blog entry, and I'll try to fix things.

Categories: Development

Passing Business Object Values to Custom UI Components in ABCS

Mon, 2017-04-24 17:29

This quick one is based on a customer question about Oracle Application Builder Cloud Service. The scenario is that we have a business object that has a field that contains the URL to an image. We want to be able to show that image on a page in Oracle Application Builder Cloud Service.

animated GIF

To do that I add a custom UI component object to the details (or edit) page of a record - then I switched the HTML of that object to be: <img id="logoimg"/>

custom code

I then added a button to the page and added a bit of custom JavaScript code in its action as follow:

var img = document.getElementById('logoimg');

img.src=$Company.getValue('Logo');

resolve();

This code simply locates the custom object on the page using the object id and then sets the src property of the img html tag to match the value of the field in the business object.

Code in Button

Categories: Development

Custom UI Components in Oracle ABCS for Dynamic Image Display

Mon, 2017-04-24 17:29

This quick one is based on a customer question about Oracle Application Builder Cloud Service. The scenario is that we have a business object that has a field that contains the URL to an image. We want to be able to show that image on a page in Oracle Application Builder Cloud Service.

animated GIF

To do that I add a custom UI component object to the details (or edit) page of a record - then I switched the HTML of that object to be: <img id="logoimg"/>

custom code

I then added a button to the page and added a bit of custom JavaScript code in its action as follow:

var img = document.getElementById('logoimg');

img.src=$Company.getValue('Logo');

resolve();

This code simply locates the custom object on the page using the object id and then sets the src property of the img html tag to match the value of the field in the business object.

Code in Button

Categories: Development

Passing Values Between Pages in Oracle Application Builder Cloud Service

Thu, 2017-03-09 12:50

A common use case for applications that have multiple pages is passing values between pages. For example you might want to pick up a specific record or value in one page and then use that as a parameter for a query in another page.

In the February release or Oracle Application Builder Cloud Service as part of the extension hook points that we provide, we added support for shared resources. These are JavaScript libraries you can add to your application - and that can be used across your app.

In the demo below I show you how you can use the built-in sample template for a shared resource to define a variable, and then how that variable is exposed in various places in the product through the expression builder allowing you to set its value in one page and use that value in another one.

Check it out:

Categories: Development

Passing Values Between Pages in Oracle Application Builder Cloud Service

Thu, 2017-03-09 12:50

A common use case for applications that have multiple pages is passing values between pages. For example you might want to pick up a specific record or value in one page and then use that as a parameter for a query in another page.

In the February release or Oracle Application Builder Cloud Service as part of the extension hook points that we provide, we added support for shared resources. These are JavaScript libraries you can add to your application - and that can be used across your app.

In the demo below I show you how you can use the built-in sample template for a shared resource to define a variable, and then how that variable is exposed in various places in the product through the expression builder allowing you to set its value in one page and use that value in another one.

Check it out:

Categories: Development

Business Logic in Oracle Application Builder Cloud Service

Tue, 2017-03-07 16:35

As you start building more complex applications in Oracle Application Builder Cloud Service, you'll might need to define more complex interactions between objects or validations on rows of data or specific fields.

In the new version of ABCS that we rolled out in February we added these type of capabilities.

There are several things you could do with the new Business Rules section of ABCS

  • Triggers - allow you create logic that will be executed in specific CRUD events such as when you insert, remove or update a record.
  • Object Validators - allowing you to define checks across multiple fields in your object
  • Field Validators - allowing you to define a check on specific field values.
  • Object Functions - reusable functions that can be called from the other points

Note that these logic points will be running on the server side of ABCS. 

In the video below I demonstrate a couple of these capabilities. You'll learn how to update one object when a specific value is set in another object's field. You'll also see how to check whether a combination of values in fields in a record is valid.

Check it out:

&amp;lt;p&amp;gt; &amp;lt;/p&amp;gt;

Here is a screenshot of the nice logic flow editor:

Categories: Development

Business Logic in Oracle Application Builder Cloud Service

Tue, 2017-03-07 16:35

As you start building more complex applications in Oracle Application Builder Cloud Service, you'll might need to define more complex interactions between objects or validations on rows of data or specific fields.

In the new version of ABCS that we rolled out in February we added these type of capabilities.

There are several things you could do with the new Business Rules section of ABCS

  • Triggers - allow you create logic that will be executed in specific CRUD events such as when you insert, remove or update a record.
  • Object Validators - allowing you to define checks across multiple fields in your object
  • Field Validators - allowing you to define a check on specific field values.
  • Object Functions - reusable functions that can be called from the other points

Note that these logic points will be running on the server side of ABCS. 

In the video below I demonstrate a couple of these capabilities. You'll learn how to update one object when a specific value is set in another object's field. You'll also see how to check whether a combination of values in fields in a record is valid.

Check it out:

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Here is a screenshot of the nice logic flow editor:

Categories: Development

Automating DevOps for the Oracle Database with Developer Cloud Service and SQLcl

Fri, 2017-02-10 13:58

In the previous blog entry I showed how you can leverage Oracle Developer Cloud Service (DevCS) to manage the lifecycle of your database creation scripts (version management, branching, code reviews etc).

But how do you make sure that your actual database is in synch with the changes that you make in your scripts?

This is another place where DevCS can come to the rescue with the built-in continuous integration functionality it provides. Specifically with the new features for database integration including secure DB connection specification, and leveraging the powerful SQL Command Line (SQLcl) - the new command line interface to the Oracle DB - which is built-in in the DevCS build servers.

In the video below I go through a process where a check-in of SQL script code change automatically initiate a build process that modifies a running database.

A few points to note:

  • For the sake of simplicity, the demo doesn't follow the recommended step of a code review before merging changes into the master branch (you can see how to do that here).
  • The demo automates running the build whenever a change to the scripts is done. You could also define a scenario where the build runs at a specific time every day - for example at 1am - and synch the DB to today's scripts.
  • You can further extend the scenario shown here of dropping and re-creating objects to add steps to populate the DB with new data and even run tests on the new database.

As you can see Developer Cloud Service can be a very powerful engine for your database DevOps - and it is included for free with your Oracle Database Cloud Services - so give it a try

DB Build

Categories: Development

Automating DevOps for the Oracle Database with Developer Cloud Service and SQLcl

Fri, 2017-02-10 13:58

In the previous blog entry I showed how you can leverage Oracle Developer Cloud Service (DevCS) to manage the lifecycle of your database creation scripts (version management, branching, code reviews etc).

But how do you make sure that your actual database is in synch with the changes that you make in your scripts?

This is another place where DevCS can come to the rescue with the built-in continuous integration functionality it provides. Specifically with the new features for database integration including secure DB connection specification, and leveraging the powerful SQL Command Line (SQLcl) - the new command line interface to the Oracle DB - which is built-in in the DevCS build servers.

In the video below I go through a process where a check-in of SQL script code change automatically initiate a build process that modifies a running database.

A few points to note:

  • For the sake of simplicity, the demo doesn't follow the recommended step of a code review before merging changes into the master branch (you can see how to do that here).
  • The demo automates running the build whenever a change to the scripts is done. You could also define a scenario where the build runs at a specific time every day - for example at 1am - and synch the DB to today's scripts.
  • You can further extend the scenario shown here of dropping and re-creating objects to add steps to populate the DB with new data and even run tests on the new database.

As you can see Developer Cloud Service can be a very powerful engine for your database DevOps - and it is included for free with your Oracle Database Cloud Services - so give it a try

DB Build

Categories: Development

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