Techlogbooks

  Problem Overview A commonly encountered error while attempting to obtain an OAuth token from Salesforce using the authorization code flow. After receiving an authorization code: https://login.salesforce.com/services/oauth2/token Including the following parameters: code grant_type = “authorization_code” redirect_uri client_id client_secret However, Salesforce responded with: {"error":"invalid_grant","error_description":"authentication failure"} HTTP status code 400 accompanied the error—indicating that despite all parameters being provided, the token exchange failed unexpectedly. Step-by-Step to Fix Authentication The comprehensive approach to resolve this issue: Create a Salesforce Developer Account Begin with a free developer account from developer.salesforce.com. Set Up a Connected App From the Setup menu, navigate to Create → Apps → Connected Apps → New . Fill out required fields—including OAuth settings and callb...

  In the competitive world of Salesforce development, being well-versed in integration topics is a clear differentiator—especially in interviews. Whether you're a fresh developer or a seasoned pro, understanding how Salesforce connects to external systems, orchestrates data flow, and ensures secure, robust performance is foundational. This overview distills the top integration areas that interviewers often explore, equipping candidates with both depth and clarity to articulate strong, confident responses. 1. Understanding Salesforce Integration Patterns Interviewers often start with core design patterns that guide Salesforce integrations. Expect to discuss concepts such as: Request-and-Reply , where outbound requests from Salesforce lead to instantaneous responses. Fire-and-Forget , where Salesforce sends notifications externally without awaiting a response. Batch Data Synchronization , helpful for handling large data loads efficiently. Publish-Subscribe (via Platform E...

In today’s fast-paced digital landscape, building applications that are fast, reliable, and easy to maintain is no longer optional—it’s essential. Developers working with modern web components face the dual challenge of delivering seamless user experiences while keeping codebases clean and scalable. This session brings together practical insights from seasoned engineers who share proven strategies to optimize performance, streamline debugging, and write maintainable code. The result is a clear roadmap for developers looking to elevate their craft and build applications that stand the test of time. Elevating Performance in Web Components At the core of any responsive application lies efficient performance. The presenters emphasize streamlining rendering logic and optimizing data access strategies to reduce unnecessary re-renders or lag. Key recommendations include: Avoiding costly reactivity bottlenecks by structuring data flow thoughtfully Implementing selective rendering to m...

 To increase the code coverage and understanding why certain lines of code remain uncovered during unit tests, here are the highlights scenarios where specific code paths, such as those within loops, conditionals, exception handlers, or batch processes, are not executed during tests, leading to incomplete coverage. Key Insights and Best Practices Understanding Code Coverage Calculation : Code coverage measures the percentage of executable lines of code executed during tests. Only executable lines are counted; comments, blank lines, and certain statements like  System.debug()  are excluded. ​ Writing Effective Unit Tests : Focus on testing the logic and behavior of the code by designing input data that ensures all code paths are executed. Use assertions to verify that the code behaves as expected. ​ Common Scenarios Affecting Coverage : Control Structures :  Ensure that both branches of  if / else  statements are tested by providing different inputs. Loops :...

 Overview of EIM Merge Processing: The EIM (Enterprise Integration Manager) merge process is essential in data management. It's like an orchestra conductor, using a combination of information from EIM table rows and settings in a configuration file to orchestrate data merging in tables. When discussing merging, we mean deleting specific rows from a base table and ensuring that other rows intersecting with the deleted ones are updated to point to the remaining rows. It's a bit like tidying up a messy room. The data from the record we choose as the "survivor" is preserved, while data from the other records gets thrown out. Suppose there are other related records linked to the ones we're merging. In that case, those records (except for the duplicates) become associated with the survivor. Think of it as combining two address books; the entries from one get added to the other. However, when dealing with child records (like Contacts) of the deleted rows, things can get ...

 EIM Delete Process Identification of Rows for Deletion The EIM Delete Process involves reading information from the EIM tables and the EIM configuration file to determine which rows should be deleted from the Siebel base tables. During multiple passes through the EIM tables, EIM carries out specific tasks, including initialization, applying filter logic, and updating related tables. Deletion Methods Supported EIM offers various methods for selecting and deleting rows, depending on the combination of EIM table row contents and configuration file parameter values. These methods include deleting rows based on user keys, matching column criteria defined in the configuration file, or deleting all rows from the base table. Delete Process Flow To execute an EIM delete process successfully, a thorough understanding of the parameter settings specifying delete criteria is crucial. The deletion process itself comprises several steps: 1. Initialization of EIM Tables • Suppose the configur...

Data Export with EIM - An Overview Exporting data with EIM involves a process where EIM accesses data stored in Siebel database tables and transfers it to the relevant EIM tables. Typically, this export operation creates entries in the appropriate EIM tables for each row encountered in the Siebel base tables. In cases where EIM tables are associated with multiple Siebel base tables, a single export can lead to various entries within the EIM table, reflecting the rows from the corresponding Siebel base tables. Throughout these processes, EIM performs several critical tasks, including initializing the EIM tables for export, applying filters to select specific rows for export, and updating EIM table rows to indicate their export status. The EIM Export Process Unveiled The process of exporting data to EIM tables through EIM involves a series of well-defined steps: Initialization of EIM Tables for Export: EIM starts the export operation by initializing the EIM tables designated for export. ...