Tagged articles

backend

5000 articles · Page 11 of 50

Mar 19, 2025 · Backend Development

Java Backend Interview Topics: Thread‑Safe Collections, JVM Memory, Optimistic Lock, Caching, and More

The article reviews key Java backend interview topics—including thread‑safe collections, JVM memory layout and heap tuning, Full GC troubleshooting, Java 8 features, optimistic locking, stock‑over‑sell handling with Redis, MySQL scaling, cache‑consistency patterns, anti‑bot safeguards, and Bloom filters—while noting JD’s recent 30% salary hike for algorithm engineers.

JVMJavabackend

0 likes · 22 min read

Java Backend Interview Topics: Thread‑Safe Collections, JVM Memory, Optimistic Lock, Caching, and More

php Courses

Mar 19, 2025 · Backend Development

PHP Performance Optimization: Faster Alternatives to Common Functions

This article presents a series of PHP function replacements—such as using isset() instead of array_key_exists(), strpos() over strstr(), pre‑increment ++$i, foreach over for, json_encode()/json_decode() instead of serialize()/unserialize(), strict === over ==, and implode() rather than string concatenation—to boost code speed without altering business logic.

Coding PracticesOptimizationPHP

0 likes · 6 min read

PHP Performance Optimization: Faster Alternatives to Common Functions

Su San Talks Tech

Mar 19, 2025 · Operations

10 Proven Strategies to Achieve 99.99% System Availability

This article presents ten practical techniques—including redundant deployment, circuit breaking, traffic shaping, auto‑scaling, gray releases, downgrade switches, full‑link stress testing, data sharding, chaos engineering, and three‑layer monitoring—to dramatically improve system high‑availability from 99% to 99.99% in production environments.

System Designbackendcloud-native

0 likes · 12 min read

10 Proven Strategies to Achieve 99.99% System Availability

FunTester

Mar 19, 2025 · Backend Development

Common Go Error Handling Mistakes and Best Practices

This article examines typical Go error handling pitfalls—including misuse of panic, improper error wrapping, incorrect error comparisons, and neglecting error checks—provides illustrative code samples, explains their potential impacts, and offers best‑practice recommendations to write robust, maintainable Go programs.

Gobackendbest practices

0 likes · 18 min read

Common Go Error Handling Mistakes and Best Practices

Laravel Tech Community

Mar 18, 2025 · Backend Development

Using devkeep/tools PHP Package: Installation, Utility Functions, and Example Usage

This article introduces the devkeep/tools PHP package, explains how to install it, lists its extensive utility functions for data handling, and provides concrete code examples demonstrating tasks such as array sorting, tree classification, Excel export, QR code generation, and email sending.

Code ExamplePHPbackend

0 likes · 4 min read

Using devkeep/tools PHP Package: Installation, Utility Functions, and Example Usage

Java Backend Full-Stack

Mar 18, 2025 · Backend Development

18 Essential Practices for Designing Robust Backend APIs

The article outlines eighteen critical considerations for designing backend interfaces, ranging from documentation format and unified parameter schemas to encryption, idempotency, versioning, and monitoring, providing interview-ready insights that can impress hiring managers.

API designInterviewVersioning

0 likes · 5 min read

18 Essential Practices for Designing Robust Backend APIs

Tencent Technical Engineering

Mar 17, 2025 · Artificial Intelligence

Building a License Approval System with Cursor AI: A Low‑Effort Full‑Stack Demo

The article demonstrates how, with Cursor’s AI‑assisted coding and its YOLO mode, a developer can rapidly build a full‑stack license‑approval system—Vue 3 front‑end, Go/Gin back‑end, JWT authentication, MySQL storage—in under a day of effort, highlighting practical tips, limitations, and the broader potential for low‑code creation.

AI programmingbackendcursor

0 likes · 11 min read

Building a License Approval System with Cursor AI: A Low‑Effort Full‑Stack Demo

Java Backend Technology

Mar 17, 2025 · Backend Development

Mastering Business Operation Logging: From AOP to Binlog with Spring

This article explores comprehensive strategies for capturing business operation logs in a Spring‑based system, comparing three solutions—from a simple AOP‑annotation approach, through an enhanced AOP + SpEL method, to a robust Binlog‑plus‑time‑window architecture—while weighing their advantages, drawbacks, and implementation details.

AOPSpELSpringBoot

0 likes · 16 min read

Mastering Business Operation Logging: From AOP to Binlog with Spring

Top Architect

Mar 16, 2025 · Backend Development

Integrating Flowable Workflow Engine with Spring Boot: A Comprehensive Guide

This article provides a step‑by‑step tutorial on using the Flowable BPMN engine within a Spring Boot project, covering workflow fundamentals, key concepts, Maven dependencies, BPMN diagram creation, service task implementation, runtime APIs, unit testing, and common troubleshooting tips.

Flowablebackendspring-boot

0 likes · 20 min read

Integrating Flowable Workflow Engine with Spring Boot: A Comprehensive Guide

Java Architect Essentials

Mar 16, 2025 · Backend Development

Using Try‑with‑Resources for GZIP Compression in Java: Avoiding Resource Leaks

This article explains how to compress large objects with GZIP before storing them in Redis, demonstrates the pitfalls of not closing streams, shows how Java's try‑with‑resources simplifies resource management, and provides best‑practice code examples to prevent hidden IO exceptions.

Javabackendgzip

0 likes · 7 min read

Using Try‑with‑Resources for GZIP Compression in Java: Avoiding Resource Leaks

FunTester

Mar 16, 2025 · Backend Development

Implementing Gender-Based Rest Periods in a Supermarket Checkout Simulation (Third Round)

The article describes how a Java-based supermarket checkout performance test was refined by adding gender-specific rest intervals—2 minutes for male cashiers and 5 minutes for female cashiers—through code changes that introduce a gender attribute, rest logic, and integration into the test workflow.

JavaRest Schedulingbackend

0 likes · 5 min read

Implementing Gender-Based Rest Periods in a Supermarket Checkout Simulation (Third Round)

Test Development Learning Exchange

Mar 14, 2025 · Backend Development

Logical Framework and Practical Guidance for API Automation Testing

This article outlines the systematic thinking process for API automation testing, details the hardware and software environment setup, and provides practical recommendations such as mastering HTTP, using JSONPath, integrating tests into CI/CD pipelines, and addressing performance and security concerns.

API testingCI/CDbackend

0 likes · 4 min read

Logical Framework and Practical Guidance for API Automation Testing

Java Tech Enthusiast

Mar 14, 2025 · Backend Development

RocketMQ Message Tracing: Concepts, Configuration, and Implementation

RocketMQ’s message tracing feature records each message’s full lifecycle—including producer, broker, and consumer details such as timestamps, latency, and success flags—by enabling traceTopicEnable, creating an internal RMQ_SYS_TRACE_TOPIC, and allowing custom trace topics for fast diagnostics, end‑to‑end tracking, monitoring, and audit compliance.

JavaMessage QueueMessage Tracing

0 likes · 7 min read

RocketMQ Message Tracing: Concepts, Configuration, and Implementation

Dual-Track Product Journal

Mar 14, 2025 · Operations

How Bad Inventory Sync Can Kill Your E‑commerce Business—and 3 Fixes to Save It

This article examines how delayed or inconsistent inventory synchronization leads to costly overselling and deadstock in e‑commerce, presents three destructive synchronization patterns, and offers a step‑by‑step guide—including real‑time messaging, distributed locks, rule‑engine integration, and intelligent alerts—to transform inventory management from a liability into a self‑healing system.

E‑commerceInventorybackend

0 likes · 8 min read

How Bad Inventory Sync Can Kill Your E‑commerce Business—and 3 Fixes to Save It

Su San Talks Tech

Mar 14, 2025 · Backend Development

Ensuring Idempotency in Distributed Systems: Patterns, Code, and Best Practices

This article explains the concept of idempotency, outlines scenarios where it is essential, analyzes common causes of idempotency problems, and presents a comprehensive set of solutions—including unique constraints, optimistic and pessimistic locks, distributed locks, token mechanisms, state machines, deduplication tables, and global request IDs—accompanied by practical code examples and database design guidelines.

backenddistributed systemsidempotency

0 likes · 14 min read

Ensuring Idempotency in Distributed Systems: Patterns, Code, and Best Practices

php Courses

Mar 13, 2025 · Backend Development

Effective Strategies for Optimizing PHP Application Performance

Optimizing PHP applications involves a combination of code-level improvements—such as caching, efficient algorithms, and query optimization—and server-side configurations like upgrading PHP, enabling opcode caches, tuning web servers, and leveraging CDNs, along with monitoring tools and asynchronous processing to achieve faster, more scalable performance.

MonitoringPHPServer configuration

0 likes · 5 min read

Effective Strategies for Optimizing PHP Application Performance

Raymond Ops

Mar 11, 2025 · Backend Development

Master Go Socket and HTTP Programming: From Dial to Custom Requests

This article explains Go's socket programming workflow, the versatile net.Dial function for TCP, UDP, and ICMP connections, provides complete ICMP and TCP example programs, and then covers HTTP client usage with net/http, including basic methods, form posts, and custom request handling.

GoSocketbackend

0 likes · 12 min read

Master Go Socket and HTTP Programming: From Dial to Custom Requests

Test Development Learning Exchange

Mar 11, 2025 · Backend Development

Comprehensive API Testing Process and Implementation Guide

This article outlines a step‑by‑step API testing workflow—from defining objectives and analyzing requirements to designing test cases, setting up environments, executing tests with tools like Postman and pytest, analyzing results, integrating into CI/CD pipelines, and applying best practices for continuous improvement.

API testingCI/CDPostman

0 likes · 5 min read

Comprehensive API Testing Process and Implementation Guide

Su San Talks Tech

Mar 11, 2025 · Backend Development

7 Proven Retry Strategies to Keep Your System Running Smoothly

This article explores seven practical retry solutions—from simple loops and Spring Retry to Resilience4j, message queues, scheduled tasks, two‑phase commits, and distributed locks—explaining their scenarios, core code, and how they prevent costly system failures.

MQResilience4jRetry

0 likes · 10 min read

7 Proven Retry Strategies to Keep Your System Running Smoothly

Selected Java Interview Questions

Mar 10, 2025 · Backend Development

Postmortem of a Server Crash Caused by a Mis‑managed Scheduled Task in a Backend Module

The article analyzes a server outage triggered by a module that repeatedly created a scheduled task without proper lifecycle control, examines the problematic Java code, lists four key issues, presents a corrected implementation, and reflects on development, testing, review, and logging practices to prevent similar incidents.

DebuggingLoggingScheduledExecutorService

0 likes · 5 min read

Postmortem of a Server Crash Caused by a Mis‑managed Scheduled Task in a Backend Module

Code Ape Tech Column

Mar 10, 2025 · Backend Development

Dynamic Service Provider Switching with spring-smart-di and AutowiredProxySPI

This article explains how to dynamically switch between multiple service providers, such as SMS vendors, in a Spring‑based backend by using spring‑smart‑di's @AutowiredProxySPI and related annotations, covering configuration, Maven dependency, enabling the feature, and custom proxy implementations.

Dynamic ConfigurationJavaSpring

0 likes · 9 min read

Dynamic Service Provider Switching with spring-smart-di and AutowiredProxySPI

php Courses

Mar 10, 2025 · Backend Development

Using curl_multi_getcontent() to Retrieve Content from Multiple cURL Sessions in PHP

This article explains the purpose and usage of PHP's curl_multi_getcontent() function, demonstrates how to combine it with curl_multi_init() and curl_multi_exec() for concurrent requests, and provides a complete example showing initialization, execution, content retrieval, and cleanup of multiple cURL handles.

Concurrent RequestsPHPbackend

0 likes · 4 min read

Using curl_multi_getcontent() to Retrieve Content from Multiple cURL Sessions in PHP

FunTester

Mar 10, 2025 · Backend Development

Avoid These Common Go String Mistakes That Hurt Performance

This article examines six frequent Go string pitfalls—including misuse of rune, incorrect iteration, inefficient concatenation, unnecessary conversions, substring memory leaks, and improper trim functions—explaining their impact, demonstrating flawed code, and providing optimized examples to improve correctness and performance.

GoPerformancebackend

0 likes · 13 min read

Avoid These Common Go String Mistakes That Hurt Performance

IT Services Circle

Mar 9, 2025 · Backend Development

Understanding RocketMQ Message Tracing: Concepts, Configuration, and Custom TraceTopic Implementation

This article explains RocketMQ's message tracing feature, covering its definition, key data attributes, core benefits, configuration steps for both normal and IO‑isolated modes, the underlying implementation mechanism, supported trace topics, and provides complete Java code examples for custom TraceTopic usage and verification.

ConfigurationJavaMessage Tracing

0 likes · 11 min read

Understanding RocketMQ Message Tracing: Concepts, Configuration, and Custom TraceTopic Implementation

Liangxu Linux

Mar 9, 2025 · Backend Development

Mastering Nginx Gzip: Configuration, Tips, and Common Pitfalls

Compressing HTTP responses with Nginx gzip improves user experience by reducing load times and cuts bandwidth costs, while proper directives, static gzip handling, and awareness of common misconfigurations ensure optimal performance in production environments.

Performancebackendcompression

0 likes · 6 min read

Mastering Nginx Gzip: Configuration, Tips, and Common Pitfalls

Architect's Guide

Mar 9, 2025 · Backend Development

Generating PDF Templates with iText in Java: A Step‑by‑Step Tutorial

This article demonstrates how to create a PDF template by first designing a Word document, converting it to PDF, inserting text, option, and image fields using a PDF editor, and then programmatically filling those fields with Java iText code, including dependency setup and image insertion.

JavabackendiText

0 likes · 7 min read

Generating PDF Templates with iText in Java: A Step‑by‑Step Tutorial

Code Ape Tech Column

Mar 7, 2025 · Backend Development

Using Spring's ResponseBodyEmitter for Real‑Time Streaming Responses

This article introduces Spring Framework's ResponseBodyEmitter, explains its advantages over SSE for asynchronous HTTP responses, demonstrates practical usage with a real‑time log‑streaming example, outlines core methods, working principles, best‑practice considerations, and compares it with traditional Streaming and Server‑Sent Events.

JavaResponseBodyEmitterSSE

0 likes · 10 min read

Using Spring's ResponseBodyEmitter for Real‑Time Streaming Responses

Chen Tian Universe

Mar 7, 2025 · Product Management

Designing Modern Checkout Systems: Architecture, Flow, and Real‑World Scenarios

This article explores the evolution, architecture, design preparation, processing flow, front‑end/back‑end considerations, configuration strategies, and diverse real‑world examples of checkout systems across medical, e‑commerce, entertainment, ETC, and gaming domains, highlighting how business needs shape payment experiences.

Payment ArchitectureSystem Designbackend

0 likes · 36 min read

Designing Modern Checkout Systems: Architecture, Flow, and Real‑World Scenarios

Selected Java Interview Questions

Mar 6, 2025 · Backend Development

Understanding How BigDecimal Guarantees Precision in Java

This article explains the Java BigDecimal class, its internal fields and methods, demonstrates a test case, and analyzes the add operation to show how scaling numbers to long integers preserves exact precision in financial calculations.

ArithmeticBigDecimalFinancial

0 likes · 6 min read

Understanding How BigDecimal Guarantees Precision in Java

macrozheng

Mar 6, 2025 · Backend Development

When Should You Actually Add a Thread Pool? Insights from Real‑World SpringBoot/Dubbo Projects

This article explores why many developers rarely use thread pools, demonstrates a SpringBoot‑Dubbo demo to reveal hidden thread pools in web containers and RPC frameworks, and offers practical guidance on when to tune existing pools versus adding custom ones for optimal performance.

JavaPerformancebackend

0 likes · 11 min read

When Should You Actually Add a Thread Pool? Insights from Real‑World SpringBoot/Dubbo Projects

Lobster Programming

Mar 6, 2025 · Backend Development

Which Multi‑Tenant Architecture Is Right for Your SaaS? A Deep Dive into 5 Patterns

This article explains five common multi‑tenant implementation patterns—independent databases, shared database with separate schemas, shared tables, hybrid approaches, and containerized isolation—detailing their isolation levels, cost implications, scalability, and suitable use cases for SaaS applications.

Database isolationSaaSarchitecture

0 likes · 6 min read

Which Multi‑Tenant Architecture Is Right for Your SaaS? A Deep Dive into 5 Patterns

php Courses

Mar 5, 2025 · Backend Development

Using PHP json_decode to Convert JSON Strings to PHP Variables

This article explains how PHP's built-in json_decode function converts JSON-formatted strings into PHP variables, demonstrating both object and associative array outputs with code examples, and shows how to adjust parameters to obtain the desired data structure.

PHPbackenddata conversion

0 likes · 4 min read

Using PHP json_decode to Convert JSON Strings to PHP Variables

php Courses

Mar 5, 2025 · Backend Development

Using PHP Generator Functions to Create Infinite Iterable Objects for Large Data Processing

The article explains how PHP generator functions can create infinite iterable objects, such as a Fibonacci sequence, to process large data sets efficiently by yielding values on demand, reducing memory usage and improving performance, with practical code examples and discussion of advantages and use cases.

Large DataPHPbackend

0 likes · 5 min read

Using PHP Generator Functions to Create Infinite Iterable Objects for Large Data Processing

php Courses

Mar 5, 2025 · Backend Development

PHP Session Management and User Authentication

This article explains PHP's session management mechanisms, basic session operations, security considerations, and various user authentication methods—including session‑based login, token‑based authentication, and password hashing—providing developers with practical guidance to build secure web applications.

PHPUser Authenticationbackend

0 likes · 4 min read

PHP Session Management and User Authentication

Code Ape Tech Column

Mar 5, 2025 · Backend Development

Design and Implementation of a Reactive Download Library for Spring MVC and WebFlux

This article introduces a Java library that simplifies file download functionality in Spring MVC and WebFlux by using a single @Download annotation, handling various source types, concurrent loading, compression, and response writing through a flexible, reactive handler chain architecture.

DownloadJavaSpring

0 likes · 16 min read

Design and Implementation of a Reactive Download Library for Spring MVC and WebFlux

php Courses

Mar 4, 2025 · Backend Development

Advanced PHP File and Directory Operations

This article provides a comprehensive guide to advanced PHP file and directory handling, covering reading and writing files, retrieving file metadata, manipulating file pointers, traversing and managing directories, handling uploads, error handling, and best practices with clear code examples.

File I/OPHPbackend

0 likes · 6 min read

Advanced PHP File and Directory Operations

php Courses

Mar 4, 2025 · Backend Development

Using PHP mysqli_query to Execute MySQL Queries

This article explains how to use PHP's mysqli_query function to connect to a MySQL database, execute SELECT statements, process result sets with mysqli_fetch_assoc, and handle other query types such as INSERT, UPDATE, and DELETE, including full example code and best practices.

DatabasePHPbackend

0 likes · 4 min read

Using PHP mysqli_query to Execute MySQL Queries

Java Backend Technology

Mar 4, 2025 · Backend Development

When Are Service‑Layer Interfaces Really Needed?

This article examines the three classic reasons for defining interfaces on Service and DAO layers, explains why they often fall short when using Spring's dependency injection, and offers practical structuring and workflow tips for projects that may or may not require multiple implementations.

Service LayerSpringbackend

0 likes · 8 min read

When Are Service‑Layer Interfaces Really Needed?

IT Services Circle

Mar 3, 2025 · Backend Development

Meituan Spring Hiring Overview and Java Backend Interview Q&A

This article discusses Meituan's spring recruitment numbers, then provides detailed Java backend interview questions and answers covering Spring MVC vs Spring Boot, MySQL MVCC, Redis Zset implementation, message queue reliability, HashMap internals, and thread pool usage, offering practical insights for candidates.

JavaMySQLSpring

0 likes · 20 min read

Meituan Spring Hiring Overview and Java Backend Interview Q&A

Top Architecture Tech Stack

Mar 3, 2025 · Backend Development

ByteDance Java Backend Internship Interview – First Round Technical Topics Overview

This article shares the ByteDance Java backend internship first‑round interview experience, detailing the company's massive hiring drive, interview structure, and deep technical questions covering URL parsing, DNS resolution, TCP handshake, TLS, HTTP request handling, and related networking concepts.

AlgorithmsByteDanceInterview

0 likes · 6 min read

ByteDance Java Backend Internship Interview – First Round Technical Topics Overview

Architect's Guide

Mar 2, 2025 · Backend Development

Fast-Retry: High‑Performance Asynchronous Multi‑Task Retry Framework for Java

Fast‑Retry is a high‑performance Java library that enables asynchronous, multi‑task retry with customizable policies, offering dramatically better throughput than traditional synchronous retry frameworks like Spring‑Retry and Guava‑Retry for large‑scale user‑identity polling scenarios.

JavaPerformanceRetry

0 likes · 7 min read

Fast-Retry: High‑Performance Asynchronous Multi‑Task Retry Framework for Java

Selected Java Interview Questions

Mar 1, 2025 · Backend Development

Using Maven Reactor for Selective Multi‑Module Builds

This article explains how Maven’s reactor determines build order in a parent‑child multi‑module project and demonstrates how to use command‑line options such as -pl, -rf, -am, and -amd to build only required modules or their dependents, greatly speeding up the build process.

Multi-moduleReactorbackend

0 likes · 8 min read

Using Maven Reactor for Selective Multi‑Module Builds

Code Ape Tech Column

Feb 28, 2025 · Backend Development

Spring Boot Packaging with Maven Assembly Plugin and a Deployment Shell Script

This article explains how to configure Maven profiles for different environments, use the maven‑assembly‑plugin and maven‑jar‑plugin to create a zip deployment package for a Spring Boot application, and provides a reusable shell script (shenniu_publish.sh) for extracting, starting, stopping, and restarting the service on Linux.

MavenShell scriptSpring Boot

0 likes · 13 min read

Spring Boot Packaging with Maven Assembly Plugin and a Deployment Shell Script

Selected Java Interview Questions

Feb 27, 2025 · Backend Development

Step-by-Step Guide to Using MybatisX with Spring Boot

This article introduces MybatisX, an IntelliJ IDEA plugin that streamlines MyBatis and MyBatis‑Plus development, and provides a detailed step‑by‑step tutorial on setting up a Spring Boot project, configuring the database, generating code, and writing a simple controller using MyBatis‑Plus.

JavaMyBatisXMybatis-Plus

0 likes · 5 min read

Step-by-Step Guide to Using MybatisX with Spring Boot

Code Ape Tech Column

Feb 27, 2025 · Information Security

Implementing Single Sign-On (SSO) with Ticket‑Based Authentication in Java

This article explains the concept of Single Sign-On, its advantages, and two practical implementations using ticket‑based authentication and encrypted user data exchange between Service A and Service B, complete with database schema, configuration files, and full Java code examples.

JavaSSOSingle Sign-On

0 likes · 18 min read

Implementing Single Sign-On (SSO) with Ticket‑Based Authentication in Java

Java Architect Essentials

Feb 27, 2025 · Backend Development

How to Enforce Login Attempt Limits with Spring Boot, Redis, and Lua Scripts

This article walks through the problem of locking out users after multiple failed login attempts, explains why IP‑based locking with Redis and Lua scripts is effective, and provides a complete Spring Boot implementation—including front‑end HTML, custom annotations, AOP aspect, Redis configuration, and sample controller code—to enforce a configurable login‑attempt limit.

JavaLogin Rate LimitingLua

0 likes · 18 min read

How to Enforce Login Attempt Limits with Spring Boot, Redis, and Lua Scripts

Rare Earth Juejin Tech Community

Feb 27, 2025 · Backend Development

Understanding and Using Spring's @Import Annotation

This article explains the purpose, usage patterns, and internal mechanics of Spring's @Import annotation, including importing regular classes, ImportSelector implementations, and ImportBeanDefinitionRegistrar implementations, with complete code examples and a discussion of how Spring processes these imports at runtime.

ConfigurationDependencyInjectionJava

0 likes · 9 min read

Understanding and Using Spring's @Import Annotation

php Courses

Feb 26, 2025 · Backend Development

Using PHP file_exists() to Check File and Directory Existence

This article explains PHP's file_exists() function, detailing its syntax, parameters, return values, usage examples for checking both files and directories, and important considerations such as remote checks and permission handling in web applications.

backendfile checkfile_exists

0 likes · 4 min read

Using PHP file_exists() to Check File and Directory Existence

Architect's Must-Have

Feb 26, 2025 · Backend Development

How to Implement Version-Based Routing and Gray Deployment in Microservices

This article explains how to design custom routing strategies for versioned microservices, including default master branch routing, unified version routing, and service‑specific routing, and shows how to apply these rules to achieve gray deployments with load‑balancing and seamless version isolation.

Gray DeploymentRoutingVersioning

0 likes · 10 min read

How to Implement Version-Based Routing and Gray Deployment in Microservices

Python Crawling & Data Mining

Feb 26, 2025 · Backend Development

How to Build a Python Bot that Emails Random Song Lyrics Daily

This tutorial shows how to use Python to scrape song lyrics from a music website, format them, and automatically email them each day, with optional scheduling via Windows Task Scheduler, providing full source code and step‑by‑step explanations.

SMTPbackendwindows task scheduler

0 likes · 6 min read

How to Build a Python Bot that Emails Random Song Lyrics Daily

Selected Java Interview Questions

Feb 25, 2025 · Backend Development

Integrating URule Rule Engine with Spring Boot: Installation, Configuration, and Practical Examples

This article introduces the URule rule engine, explains its core concepts, shows how to install and configure it in a Spring Boot project, demonstrates library definitions, rule set creation (wizard and script modes), decision table usage, and provides real‑world scenario code examples for backend developers.

ConfigurationJavaRule Engine

0 likes · 15 min read

Integrating URule Rule Engine with Spring Boot: Installation, Configuration, and Practical Examples

php Courses

Feb 25, 2025 · Backend Development

Understanding PHP time() Function: Usage, Examples, and Applications

This article explains PHP's time() function, describing how it returns the current Unix timestamp, demonstrates basic usage with code examples, shows how to compare dates and format the timestamp, and provides practical snippets for common time‑related tasks in backend development.

PHPbackenddate handling

0 likes · 4 min read

Understanding PHP time() Function: Usage, Examples, and Applications

Su San Talks Tech

Feb 24, 2025 · Backend Development

How JD’s Hotkey Framework Detects and Mitigates Hot Data in Milliseconds

The JD App backend hotkey framework provides millisecond‑level detection of bursty hot data, users, and interfaces, pushes the hot keys to all JVMs in the cluster, and dramatically reduces database query pressure while improving overall application performance.

HotKeyJavabackend

0 likes · 8 min read

How JD’s Hotkey Framework Detects and Mitigates Hot Data in Milliseconds

Architect's Guide

Feb 24, 2025 · Backend Development

Using Java Optional to Prevent NullPointerException

This article introduces Java 8's Optional class, explains its creation methods and common operations such as get, isPresent, ifPresent, filter, map, flatMap, orElse, orElseGet, orElseThrow, and shows practical usage scenarios and best‑practice recommendations for handling null values in backend code.

Functional ProgrammingJavaJava8

0 likes · 15 min read

Using Java Optional to Prevent NullPointerException

JD Tech

Feb 24, 2025 · Backend Development

Understanding Caffeine Cache Expiration: TimeWheel Mechanism and Custom Expiration Strategies

This article explains how Caffeine implements element expiration using three built‑in policies and a custom TimeWheel strategy, detailing the construction of the timer wheel, bucket selection, scheduling, advancing, and eviction logic within the cache's maintenance cycle.

CacheCaffeineJava

0 likes · 15 min read

Understanding Caffeine Cache Expiration: TimeWheel Mechanism and Custom Expiration Strategies

Top Architect

Feb 23, 2025 · Backend Development

Introducing LiteFlow: A Lightweight Rule Engine for Java Backend Development

This article explains how the LiteFlow rule engine can be integrated into Spring Boot projects to orchestrate serial and parallel business processes, describes its architecture, component types, configuration options, and provides practical code examples and a real‑world e‑commerce workflow.

backend

0 likes · 11 min read

IT Services Circle

Feb 23, 2025 · Backend Development

DJI Java Backend Interview Experience, Salary Insights, and Core Concurrency Knowledge

The article shares DJI's impressive compensation data, details a 50‑minute Java backend interview covering concurrency tools, locks, CountDownLatch, ConcurrentHashMap, Kafka ordering, zero‑copy, Spring AOP, filters vs. interceptors, and provides code examples and explanations for each concept.

DJIJavaKafka

0 likes · 28 min read

DJI Java Backend Interview Experience, Salary Insights, and Core Concurrency Knowledge

FunTester

Feb 23, 2025 · Operations

How to Efficiently Process Test Data in a Multithreaded Performance Engine

This article explains two design approaches for handling test data in a multithreaded performance testing engine, compares their trade‑offs, and provides complete Java code for data aggregation, statistical analysis, TPS calculation, and refactoring the tool for cleaner extensibility.

Data StatisticsJavaQuantile

0 likes · 14 min read

How to Efficiently Process Test Data in a Multithreaded Performance Engine

Architect's Guide

Feb 21, 2025 · Information Security

Technical Selection and Implementation of Authentication: JWT vs Session in a Java Backend

This article compares JWT and session authentication, discusses their differences, advantages, security and performance considerations, and provides a complete Java implementation with Redis integration, including token generation, validation, renewal, and interceptor configuration for secure backend services.

JWTJavaRedis

0 likes · 13 min read

Technical Selection and Implementation of Authentication: JWT vs Session in a Java Backend

php Courses

Feb 20, 2025 · Backend Development

Using PHP mb_strlen() to Get the Length of Multibyte Strings

This article explains how to enable the mbstring extension and use PHP's mb_strlen() function with optional encoding parameters to accurately measure the length of multibyte strings such as Chinese and Japanese, including practical code examples for length calculation and validation.

PHPbackendmbstring

0 likes · 5 min read

Using PHP mb_strlen() to Get the Length of Multibyte Strings

php Courses

Feb 20, 2025 · Backend Development

Introduction to PHP Basics: Syntax, Variables, Operators, Control Structures, Functions, and More

This article provides a concise overview of PHP fundamentals, covering script tags, variable declarations and data types, operators, control structures, functions, array and string manipulation functions, as well as file inclusion techniques, offering beginners a solid foundation for web development.

Syntaxbackendvariables

0 likes · 4 min read

Introduction to PHP Basics: Syntax, Variables, Operators, Control Structures, Functions, and More

macrozheng

Feb 20, 2025 · Backend Development

Mastering Java 8 Streams: Clean Code Tips and Common Pitfalls

This article explores how Java 8 streams and lambda expressions can make code shorter and more elegant, while highlighting common mistakes such as poor formatting, oversized functions, misuse of Optional, and over‑reliance on parallel streams, and offers practical guidelines for writing readable, maintainable backend code.

JavaLambdaStreams

0 likes · 13 min read

Mastering Java 8 Streams: Clean Code Tips and Common Pitfalls

php Courses

Feb 19, 2025 · Backend Development

Using PHP's file() Function to Read Files into an Array

This tutorial explains how PHP's file() function reads a text file into an array, demonstrates the default behavior of preserving line breaks, and shows how to use flags such as FILE_IGNORE_NEW_LINES and FILE_SKIP_EMPTY_LINES to control newline retention and skip empty lines.

backendfile-functionfile-handling

0 likes · 4 min read

Using PHP's file() Function to Read Files into an Array

php Courses

Feb 18, 2025 · Backend Development

Using PHP glob() to Retrieve File Paths with Pattern Matching

This article explains PHP's glob() function, detailing its syntax, parameters, and various pattern‑matching examples—including wildcard, extension, brace, and recursive searches—while highlighting important flags and considerations for handling returned file and directory arrays.

Patternbackendfile-matching

0 likes · 4 min read

Using PHP glob() to Retrieve File Paths with Pattern Matching

Mingyi World Elasticsearch

Feb 17, 2025 · Backend Development

Infinilabs Gateway Config File: A Layer‑by‑Layer Deep Dive

This article walks through the Infinilabs Gateway configuration file from top‑level environment variables down to low‑level disk queues, explaining each section—env, paths, gateway core, stats, API, Elasticsearch services, entry, router, flow, pipelines, metrics, disk queue, Badger KV, floating IP, and global elastic settings—so readers can quickly understand and customize the gateway for microservice and big‑data deployments.

ConfigurationElasticsearchInfinilabs Gateway

0 likes · 18 min read

Infinilabs Gateway Config File: A Layer‑by‑Layer Deep Dive

php Courses

Feb 17, 2025 · Backend Development

Using PHP is_string() to Determine Whether a Variable Is a String

This article explains the PHP is_string() function, its syntax, and provides a complete example showing how to check variables $name, $age, and $city to determine if they are strings, along with best‑practice security considerations.

backendis_stringphp-functions

0 likes · 4 min read

Using PHP is_string() to Determine Whether a Variable Is a String

php Courses

Feb 17, 2025 · Backend Development

Using PHP is_bool() to Check Boolean Variables

This article explains how the PHP is_bool() function can be used to determine whether a variable holds a boolean value, provides clear code examples with different variable types, and shows the resulting output to illustrate correct usage.

Functionbackendboolean

0 likes · 4 min read

Using PHP is_bool() to Check Boolean Variables

21CTO

Feb 15, 2025 · Backend Development

Choosing the Right API Architecture in 2025: REST, GraphQL, or tRPC?

This article examines the strengths and trade‑offs of REST, GraphQL, and tRPC for API design in 2025, helping teams decide which architecture aligns with their expertise, project scope, and performance requirements.

APIGraphQLREST

0 likes · 7 min read

Choosing the Right API Architecture in 2025: REST, GraphQL, or tRPC?

Python Programming Learning Circle

Feb 15, 2025 · Backend Development

Proper Python Configuration for Multi‑Environment Applications

This article explains how to structure Python projects so that configuration is managed through packages and environment variables, enabling seamless deployment across development, testing, staging, and production environments without code changes, while illustrating best practices with clear examples and code snippets.

ConfigurationPythonbackend

0 likes · 12 min read

Proper Python Configuration for Multi‑Environment Applications

Architect's Guide

Feb 15, 2025 · Backend Development

Using @TableLogic Annotation for Logical Deletion in MyBatis-Plus

This article explains how the @TableLogic annotation in MyBatis-Plus implements logical deletion by converting delete operations into updates, details its parameters, supported field types, global configuration, and provides complete Java and SQL code examples for practical usage.

AnnotationJavaLogical Deletion

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Using @TableLogic Annotation for Logical Deletion in MyBatis-Plus

php Courses

Feb 14, 2025 · Backend Development

Using PHP fread() to Read Files: Syntax, Parameters, and Example

This article explains PHP's fread() function, covering its syntax, parameters, return values, optional offset argument, and provides a complete example that opens a file, reads its contents based on size, outputs the data, and closes the handle.

Code ExampleFile HandlingPHP

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Using PHP fread() to Read Files: Syntax, Parameters, and Example

php Courses

Feb 14, 2025 · Backend Development

Using PHP’s file() Function to Read Files into an Array

This article explains how PHP’s file() function reads a text file into an array, demonstrates the default behavior of preserving line endings, and shows how to use flags such as FILE_IGNORE_NEW_LINES and FILE_SKIP_EMPTY_LINES for more flexible file handling.

File HandlingPHPbackend

0 likes · 3 min read

37 Interactive Technology Team

Feb 13, 2025 · Backend Development

How to Unify Swagger2.0 Docs with GF2 Routing: A Practical Guide

This article analyzes the shortcomings of separating Swagger2.0 documentation from parameter handling in a Go backend, proposes a unified parameter definition and routing adapter for the GF framework, and demonstrates the resulting automatic OpenAPI generation with detailed code flow and visual examples.

API documentationGoRouting

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How to Unify Swagger2.0 Docs with GF2 Routing: A Practical Guide

php Courses

Feb 13, 2025 · Backend Development

Using PHP strlen() to Calculate String Length

This article explains PHP's strlen() function, its syntax, demonstrates how to calculate string lengths with and without surrounding spaces using code examples, and discusses important considerations such as encoding support and handling of special or multibyte characters.

CodingPHPbackend

0 likes · 4 min read

Using PHP strlen() to Calculate String Length

php Courses

Feb 13, 2025 · Backend Development

Using PHP's array_column() Function to Extract Values from Multidimensional Arrays

This article explains how the PHP array_column() function, available since version 5.5, can extract specific keys from multidimensional arrays, shows its syntax, parameter details, and provides practical code examples including using an index key for associative results.

Code ExamplePHParray_column

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Using PHP's array_column() Function to Extract Values from Multidimensional Arrays

Lobster Programming

Feb 13, 2025 · Backend Development

Zero‑Copy Explained: From write+read to mmap, sendfile and splice

This article breaks down zero‑copy data transfer techniques—write+read, mmap+write, sendfile, sendfile + SG‑DMA, and splice—showing how they reduce CPU copies and context switches to boost I/O performance in modern operating systems.

Data Transferbackendmmap

0 likes · 9 min read

Zero‑Copy Explained: From write+read to mmap, sendfile and splice

Top Architect

Feb 12, 2025 · Backend Development

Payment System Architecture Overview and Core Components

This article presents a comprehensive overview of a typical payment system architecture, detailing the division between transaction and payment cores, their interactions, service governance, data consistency, asynchronous processing, and practical production practices for building stable, scalable backend payment services.

Service Governancearchitectureasynchrony

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Payment System Architecture Overview and Core Components

php Courses

Feb 12, 2025 · Backend Development

Using PHP str_replace for String Replacement and Deletion

This article explains PHP's str_replace function, its syntax, and provides three practical examples showing simple replacement, multiple replacements with arrays, and character deletion, while also noting additional options available in the official documentation.

PHPbackendstr_replace

0 likes · 3 min read

Using PHP str_replace for String Replacement and Deletion

php Courses

Feb 12, 2025 · Backend Development

Handling Division by Zero Errors in PHP: Differences Between PHP 7 and PHP 8 and Best Practices

This article explains how PHP 7 and PHP 8 handle division‑by‑zero errors, outlines common causes of zero‑division, and presents six practical techniques—including input validation, conditional checks, ternary operators, custom error handlers, try‑catch blocks, and avoiding the @ operator—supported by clear code examples and a real‑world financial‑app case study.

Exceptionbackenddivision-by-zero

0 likes · 6 min read

Handling Division by Zero Errors in PHP: Differences Between PHP 7 and PHP 8 and Best Practices

php Courses

Feb 11, 2025 · Backend Development

Using PHP implode() to Join Array Elements into a String

This article explains how the PHP implode() function joins array elements into a string, demonstrates basic and advanced usage with examples—including handling sub‑arrays and omitting the separator—and highlights important considerations for effective string manipulation in backend development.

Arraybackendimplode

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Using PHP implode() to Join Array Elements into a String

Lobster Programming

Feb 10, 2025 · Backend Development

How to Choose the Right Distributed Lock: DB, Redis, or ZooKeeper?

This article explains the concept of distributed locks and compares three common implementation approaches—using a database, Redis, and ZooKeeper—detailing their mechanisms, advantages, drawbacks, and suitable scenarios for ensuring consistent access to shared resources in distributed systems.

Zookeeperbackendconcurrency

0 likes · 7 min read

How to Choose the Right Distributed Lock: DB, Redis, or ZooKeeper?

php Courses

Feb 10, 2025 · Backend Development

Using PHP’s floatval Function to Convert Variables to Float

This article explains how PHP’s built‑in floatval function converts various variable types—including integers, strings, booleans, and arrays—into floating‑point numbers, provides syntax details, demonstrates multiple code examples, and notes edge cases such as non‑numeric strings returning zero.

backendfloatvaltutorial

0 likes · 3 min read

Using PHP’s floatval Function to Convert Variables to Float

php Courses

Feb 10, 2025 · Backend Development

Using PHP fgetc() to Read Characters from Files and Standard Input

This article explains how to use PHP's fgetc() function to read single characters from files and standard input, covering file opening with fopen(), the function's syntax, example code for looping through file contents, and a demonstration of handling user-entered characters with a switch statement.

File Handlingbackendfgetc

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Using PHP fgetc() to Read Characters from Files and Standard Input

Java Captain

Feb 9, 2025 · Backend Development

Using Lua Scripts in Spring Boot with Redis for Performance and Atomic Operations

This article explains how to integrate Lua scripts into Spring Boot applications with Redis, covering Lua fundamentals, advantages of Lua in Redis, practical use cases, step‑by‑step implementation in Spring Boot, performance optimizations, error handling, security considerations, and best practices for reliable backend development.

LuaPerformanceRedis

0 likes · 23 min read

Using Lua Scripts in Spring Boot with Redis for Performance and Atomic Operations

Radish, Keep Going!

Feb 8, 2025 · Backend Development

Mastering go:fix: Automate Go Code Refactoring with Inline and Forwarding

This article explains the go:fix tool for Go, covering its background, the inline function and constant forwarding mechanisms, practical code examples, advantages, challenges, and how it streamlines large‑scale codebase migrations.

Goautomationbackend

0 likes · 7 min read

Mastering go:fix: Automate Go Code Refactoring with Inline and Forwarding

Selected Java Interview Questions

Feb 7, 2025 · Backend Development

FastExcel: High‑Performance Java Excel Read/Write Library – Features, Usage, and Comparison with EasyExcel

FastExcel is a high‑performance Java library that extends EasyExcel, offering streamlined APIs, streaming read/write, event listeners, and PDF conversion, enabling developers to efficiently handle large Excel files with low memory usage in enterprise applications.

DataProcessingExcelFastExcel

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FastExcel: High‑Performance Java Excel Read/Write Library – Features, Usage, and Comparison with EasyExcel

JD Retail Technology

Feb 7, 2025 · Backend Development

Cache Big‑Key and Hot‑Key Issues: Case Study, Root‑Cause Analysis, and Mitigation Strategies

A promotional event created an oversized Redis cache entry that, combined with cache‑penetration bursts, saturated network bandwidth and caused a service outage, prompting mitigation through Protostuff serialization, gzip compression, request throttling, and enhanced monitoring, while recommending design‑time cache planning and stress testing to prevent future big‑key failures.

BigKeyCacheHotKey

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Cache Big‑Key and Hot‑Key Issues: Case Study, Root‑Cause Analysis, and Mitigation Strategies

Rare Earth Juejin Tech Community

Feb 7, 2025 · Backend Development

Getting Started with Koa: A Lightweight Node.js Framework for Building HTTP Servers

This article introduces native Node.js HTTP server creation, explains request and response concepts, and then demonstrates how to use the Koa framework—including installation, middleware, routing, body parsing, and the onion model—to build clean, maintainable backend services.

JavaScriptKoaMiddleware

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Getting Started with Koa: A Lightweight Node.js Framework for Building HTTP Servers

Go Programming World

Feb 7, 2025 · Backend Development

Implementing MultiBytes: Converting [][]byte to io.Reader in Go

This article demonstrates how to implement a MultiBytes struct in Go that converts a [][]byte slice into an io.Reader (and io.Writer), detailing the design, method implementations, and example usage with full source code.

GoMultiBytesbackend

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Implementing MultiBytes: Converting [][]byte to io.Reader in Go

php Courses

Feb 6, 2025 · Backend Development

Handling Email Sending and Receiving with PHP: Text, HTML, and Attachments

This article explains how to use PHP functions and libraries to send and receive plain‑text, HTML, and attachment‑rich emails, covering proper encoding, MIME headers, IMAP retrieval, and PHPMailer configuration for reliable email communication.

HTML emailIMAPPHPMailer

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Handling Email Sending and Receiving with PHP: Text, HTML, and Attachments

php Courses

Feb 6, 2025 · Backend Development

Using PHP's array_reverse() Function: Syntax, Examples, and Tips

This article explains PHP's array_reverse() function, covering its syntax, optional parameters, and multiple code examples that demonstrate reversing indexed arrays, associative arrays with key preservation, and combining with other array functions for more complex operations.

PHParray_reversebackend

0 likes · 4 min read

Using PHP's array_reverse() Function: Syntax, Examples, and Tips

php Courses

Feb 5, 2025 · Backend Development

Using PHP is_executable() to Check File Executability

This article explains PHP's is_executable() function, detailing its definition, parameters, return values, usage examples, code explanation, precautions, and common application scenarios for checking file executability to enhance system security in web development.

File Permissionsbackendis_executable

0 likes · 4 min read

Using PHP is_executable() to Check File Executability

php Courses

Feb 5, 2025 · Backend Development

Using PHP tmpfile() to Create and Manage Temporary Files

This article explains how the PHP tmpfile() function creates a unique temporary file that is automatically removed at script termination, demonstrates its syntax, shows a complete example with fwrite, fseek, fread and fclose, and highlights important usage considerations such as manual deletion with unlink().

File Handlingbackendphp-functions

0 likes · 4 min read

Using PHP tmpfile() to Create and Manage Temporary Files

Raymond Ops

Feb 4, 2025 · Fundamentals

Master Go Naming: Consistent, Concise, and Precise Conventions

Effective naming in Go requires consistency, brevity, and precision, with guidelines covering variable and function names, camel‑case conventions, short local variables, descriptive parameters, return values, method receivers, package naming, interface naming, and error types, illustrated by numerous code examples from the standard library.

Code stylebackendbest-practices

0 likes · 7 min read

Master Go Naming: Consistent, Concise, and Precise Conventions

Selected Java Interview Questions

Feb 4, 2025 · Backend Development

Integrating WeChat Native Pay into a Java Backend for Membership Upgrade

This guide details how to integrate WeChat native payment into a Java backend, covering merchant setup, Spring configuration, QR‑code generation with the official SDK, handling HTTPS callbacks, and implementing front‑end polling using Redis and Bloom filters for reliable membership upgrades.

JavaPayment IntegrationRedis

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Integrating WeChat Native Pay into a Java Backend for Membership Upgrade

Code Ape Tech Column

Feb 4, 2025 · Backend Development

Sa-Token Java Permission Authentication Framework: Overview, Login, and Permission Implementation

This article introduces the lightweight Sa-Token Java authentication framework, explains why it is chosen over Spring Security and Shiro, details its login and permission APIs with code examples, shows how to configure it in Spring Boot and WebFlux projects, and lists its extensive feature set for secure backend development.

JavaSa-TokenSpring Boot

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Sa-Token Java Permission Authentication Framework: Overview, Login, and Permission Implementation

Architect's Guide

Feb 4, 2025 · Backend Development

Deploying Redis Sentinel with Portainer and Integrating it into a Spring Boot Application

This tutorial walks through installing Portainer for Docker container management, creating docker‑compose files to deploy Portainer, setting up a master‑slave‑sentinel Redis architecture, configuring a custom bridge network, and finally integrating Redis Sentinel into a Spring Boot project with Lettuce connection pooling.

Container ManagementDockerRedis Sentinel

0 likes · 15 min read

Deploying Redis Sentinel with Portainer and Integrating it into a Spring Boot Application

Ubiquitous Tech

Feb 3, 2025 · Backend Development

Boost Java Development Efficiency with Equator’s Automatic Object Comparison

This article walks through the pain points of manually logging Java object changes, introduces the open‑source Equator library, explains its field‑ and getter‑based comparison strategies, shows how to integrate it via Maven, and demonstrates clean change‑log output with flexible field filtering and deep‑structure support.

EquatorJavaMaven

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Boost Java Development Efficiency with Equator’s Automatic Object Comparison

Open Source Tech Hub

Feb 1, 2025 · Backend Development

Is PHP Really Slow? Debunking Myths with Real Performance Benchmarks

This article examines common misconceptions about PHP performance, compares it with Go using Workerman, Swoole, and other frameworks, and explains why modern PHP frameworks claim high speed while highlighting JSON handling, coroutines, and asynchronous programming in PHP.

PHPSwooleasync

0 likes · 7 min read

Is PHP Really Slow? Debunking Myths with Real Performance Benchmarks

IT Services Circle

Jan 30, 2025 · Backend Development

15 Practical Spring Framework Tips for Developers

This article presents fifteen useful Spring techniques—including bean retrieval, event handling, custom interceptors, retry mechanisms, global exception handling, startup initialization, bean lifecycle methods, resource cleanup, dynamic configuration injection, conditional bean registration, caching, transaction management, bean loading order, AOP aspects, and conditional bean creation—each illustrated with clear Java code examples.

DependencyInjectionJavaSpring

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15 Practical Spring Framework Tips for Developers