Automated Code review for Apex in Salesforce – Static code analysis – Video

Using open source PMD tool to generate code quality report for Apex classes

PMD is very well known source code analyzer for Java, android and many more languages. Good news for us (Salesforce developers) is , that it supports now Apex. You might be thinking how can we make PMD as part of our daily life ?

There are multiple ways

  1. We can run static code analysis standalone
  2. It can be part of ANT build to generate error reports
  3. Jenkins can use it to generate nice report around code quality
  4. Eclipse can use it as a plugin to generate report

In this blog post, we will discuss option 1, that is running it as a standalone application to generate code quality report.

First Step is to download jar file of latest PMD distribution from here. Continue reading “Automated Code review for Apex in Salesforce – Static code analysis – Video”

Advance Apex debugging in Salesforce and best practices – Videos

How to resolve apex debug log size limit issue, Difference between Eclipse and developer console, Interactive Apex Debugging, Keyboard shortcuts for Developer console and Other best practices

While developing applications on Force.com platform using Apex, I am sure you may have been in need of debugging your code. Salesforce being cloud platform, method to debug code is very different as compared to other programming languages. In this post we will discuss all about Apex code debugging, challenges, solutions and other best practices.

Salesforce Advance Apex debugging
Salesforce Advance Apex debugging

How many ways to debug Apex code

  1. Eclipse Force.com IDE
  2. Debug log
  3. Developer console
  4. Fetch debug log using Tooling API

Continue reading “Advance Apex debugging in Salesforce and best practices – Videos”

System mode or God mode in Apex – Gotchas

Gotchas of System mode or God mode in Apex and its impact by using “With sharing” keyword in Salesforce

In many of my previous implementations I have used advantage of Apex code running in System mode however never tried how far it can go in terms of capabilties. There is no specific Salesforce documentation which can explain that what is allowed or not allowed in System mode.

In this post, we will go through some scenario and will try to understand what really is possible in Apex System mode and when it can fail.

Before diving more lets discuss how many types of mode do we have in Apex ?

User Mode : As per this Salesforce post, all Profile level permissions, sharing rules and Field level security are enforced in Apex if it runs in User mode. Standard Controller and Anonymous Apex runs in User mode.

System Mode : Same post conforms that custom controller, trigger, Apex class, controller extension works in System mode. Means eventhough user does not have necessary profile level permission, record level permission or field level permission, but still they can perform any operation on it.

Continue reading “System mode or God mode in Apex – Gotchas”

Salesforce to Salesforce integration using Named Credentials in 5 lines

I have already written article to integrate Salesforce with other Salesforce instance around 3 years back. In last 3 years, Salesforce has changed a lot. This time I will integrate Salesforce with other Salesforce only only in 5 lines of code, can you believe it  🙂 ? Check my old article, and its around 50+ lines of code with security control.

What is Named Credential ?

A named credential specifies the URL of a callout endpoint and its required authentication parameters in one definition. You can simplify the setup of authenticated Apex callouts by specifying a named credential as the callout endpoint. You can instead specify a URL as the callout endpoint and register that URL in your organization’s remote site settings. In that case, however, you handle the authentication in your code. Doing so can be less secure and especially complicated for OAuth authentication.

Long description short , “using Named Credential, we can make call out to external system without supplying username or Password”.

Continue reading “Salesforce to Salesforce integration using Named Credentials in 5 lines”

Continuation object in Apex – Asynchronous callouts for long running request – Live Demo

We may run into scenario in Salesforce project, where we need call external web service but no need to wait for response. Response from external web service can be processed asynchronously and once processed it can be presented in Visualforce page.

We can accomplish this by using Actionsupport or Javascript remoting. However, this is possible with using Continuation method as well.  In Continuation approach, we can call external web service and inform that which callback method should be used to  process response. After execution of callback method, data is presented in visualforce page.

Execution Flow of an Asynchronous Callout - Image from Salesforce documentation
Execution Flow of an Asynchronous Callout – Image from Salesforce documentation

Below code demonstrate complete usage of this.

Continue reading “Continuation object in Apex – Asynchronous callouts for long running request – Live Demo”

All about Upsert and External ID in Dataloader and Apex – Videos

You may be wondering that there are tons of articles available for upsert operation and what is need of one more blog post. I wanted to note everything important about upsert operations using datalaoder and Apex with identified gotchas at single place, and that’s why its here 🙂 .

External ID is field in Salesforce to say that this field is primary key in external Database which can be used to identify that external record exists in Salesforce or not ? There are many benefits of external key like :

  • It can be used to identify if record exists or not and record automatically inserted or updated using upsert operation
  • Upsert operation is supported by Dataloader, Apex and API
  • Any field marked as external id is indexed and can be used in SOQL or report filter
  • You can create Parent child record in single statement in Apex

Using Upsert operation to create/update child record and relate to existing parent record with help of External Id

Lets assume that you have list of contacts and Account in external SQL Server database and you want to import those Account and contact weekly. It is possible that you have already imported contacts previously so don’t want to duplicate records if already created in Salesforce. To solve this problem we can use external Id on Contact and use upsert operation on dataloader. Let’s assume external Id field on Contact is “SQL_Server__Id__c” (I am assuming that Account records in Salesforce also have external Id and records are already imported. Same below steps can be used to import Account record as well). Continue reading “All about Upsert and External ID in Dataloader and Apex – Videos”

Salesforce interview questions – Part 19

Salesforce interview questions for developers and admins around Apex, Visualforce, getting Salesforce object name on basis of Id, Apex API limits

181. Lets consider your custom Object named “Training__c” has field “Trainer__c”. You have set some default value in that field. Will that default value apply to new record created by apex code ?
OR
How to make sure that record created from apex code should respect default value of fields ?
OR
Default value in field from Apex code.
Ans :

After API 20, it should automatically populate However there is known issue for same here, click here if it impacts you.
Workaround :
If Default value of field is not getting populated by Apex then we have to use “Dynamic Apex”.  Create instance of object from sObjectType like shown below:

Training__c tr= (Training__c) Training__c.sObjectType.newSObject(null, true);

//Check if Value in field "Trainer__c" is default value
System.assertEquals('Jitendra', tr.Trainer__c);

182. What is best practice to refer dynamic custom messages in Visualforce with multi-language support ?
Ans :
Using Custom Label or OutputField or InputField tag, Platform itself will take care of internationalization. However in some cases, Message needs to be dynamic at the same time it should also support muti-language. In Custom Label, we cannot save dynamic String.

Let’s assume we want to show message something like “DEVELOPERNAME is not authorized to access this page”.
Here, Developername should be dynamically changed in visualforce which supports multilanguage. For each developername, it is not feasible to create custom labels. So below workaround can be used :

Step 1 : Create a Custom Label with text “{0} is not authorized to access this page“. In every language, dynamic value should represented by {0}.

Step 2 : In Controller of Visualforce write something like this :

String developerName = 'Some DeveloperName';
String message = String.format(Label.DEVELOPERNA, new String[] { developerName });

Continue reading “Salesforce interview questions – Part 19”

Access Camera and Audio recorder of Mobile device in Visualforce and upload as chatter file

In this article we will see how to use Camera and Audio recorder of mobile device in Visualforce and upload as chatter file. It may look that it is very tricky to access device camera and audio control in Visualforce however you may be right if there were no HTML5. Thanks to HTML5 for magic.

Visualforce Camera Access - Front Page
Visualforce Camera Access – Front Page
Visualforce Camera Access - Use Camera Prompt
Visualforce Camera Access – Use Camera Prompt

Continue reading “Access Camera and Audio recorder of Mobile device in Visualforce and upload as chatter file”

How to access ListView in Apex | Using StandardSetController for Pagination

There are scenario in project lifecycle where developer creates SOQL or Dynamic SOQL to return expected result. Also if requirement changes they go back and change existing code to reflect updated SOQL. If you are good developer and avoid to change Apex code at most you will save your SOQL in “Custom Settings” and utilize in Dynamic SOQL.

However, There is very good design Developer can suggest to client. Instead of going to your code and changing code for new requirement, how it sounds if we can utilize existing List View inside Apex or Visualforce only 🙂 ? It will solve lots of problems and if requirement changed, just change or create new Listview and it will reflect in your Visualforce code. We can almost have same functionality like Navigation buttons and Paging without writing any complex code logic, thanks to StandardSetController capabilities.

There is also very good article on Salesforce blog on various approaches suggested for pagination and one of them is using StandardSetController.

To keep article simple, I am posting complete Visualforce and Apex code with Comments inside. Account object is used as an example here. Continue reading “How to access ListView in Apex | Using StandardSetController for Pagination”

Consuming External Web Service in Apex – Salesforce

One of the feature we have in Salesforce is that we can easily consume External Web Services. In this article, we will learn step by step demo of consuming Web Service in Apex. There are many public websites available to consume Web Service and one of them, I am using in this article is http://www.webservicex.net , from this location we are using Stock Quote Webservice. To consume this, we need WSDL.

The Web Services Description Language (WSDL) is an XML-based interface description language that is used for describing the functionality offered by a Web Service.

WSDL have to be downloaded from this location. We need this WSDL in later part of this tutorial.

Once, WSDL is downloaded and saved on local drive. We have to go to Salesforce and navigate to “Setup | Develop | Apex Classes”. On right hand side, you will find button named as “Generate from WSDL”. This button will generate equivalent Apex class to support Webservice call. In some Programming languages, these classes are known as Proxy classes or Stubs.

When we click on “Generate from WSDL” button, it will prompt for WSDL File. Select WSDL file downloaded previously and click on “Parse WSDL” button. On next page you will get this error : “Failed to parse wsdl: Found more than one wsdl:portType. WSDL with multiple portType not supported”.

In some cases you may also get error like : “Failed to parse wsdl: Found more than one wsdl:binding. WSDL with multiple binding not supported”.

Continue reading “Consuming External Web Service in Apex – Salesforce”