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An honest retrospective on a challenge that did not happen in a clean streak, and on how learning Java slowly turned into learning how systems behave.
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After Day 98, I thought virtual threads replaced event loops.
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I added .parallel() expecting near-linear speedup on 8 cores.
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Day 98: I Thought Virtual Threads Were Just Green Threads They're Actually Continuations on the Heap
Deep dive into Java 21 Virtual Threads implementation - from continuations and heap-based stacks to mount/unmount mechanics, pinning problems, and production trade-offs.
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Advanced Java concurrency - DelayQueue, ReentrantLock, Phaser with debugging techniques, monitoring patterns, and production readiness checklist.
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Master core Java concurrency synchronization - CyclicBarrier, Semaphore, ThreadFactory, and BlockingQueue with production patterns, trade-offs, and real-world examples.
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Master the foundation of Java concurrency - Executor, ExecutorService, ScheduledExecutorService, Future, CompletableFuture, and CountDownLatch with production patterns, trade-offs, and debugging techniques.
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Your Java app takes so much time to start.
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Building a @Sensitive annotation with annotation processor to mask sensitive data in logs and stack traces - Java's answer to PHP's #[SensitiveParameter]
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Learn to build intelligent Java AI applications using Spring AI framework.
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Ever wondered how to process gigabyte-sized files without crashing your JVM?
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Ever wondered how APM tools like New Relic spy on your Java applications?
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That perfect Singleton you wrote?
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Leveraging Google Cloud Vertex AI's Gemini 1.5 for advanced, multilingual audio transcription within a Spring Boot application, including prompt engineering, safety settings management, and confidence scoring.
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Day 87: Java's Environment Variable Paradox: Easy to Read, Impossible to Change?
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Day 86: Building a Secure Java Sandbox with Custom Class Loaders, Process isolation and Java Platform Module System
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Day 85: Idempotent APIs in Java: Concepts, Implementation Strategies, and a Spring Boot File Upload Implementation
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Day 84: Hot Class Reload in Java – A Webpack HMR-like Experience for Java Developers using WatchService and Javax.tools api
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Day 83: Java Object Cloning: Exploring Shallow and Deep Copy Techniques
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Day 82: Reflection in Java: Building a Simple DI Container in 100 Lines of Code
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Day 81: Creating custom stream operations ex: Slide, Shift, Zip and Fold using Spliterator
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Day 80: From Concept to Code: Implementing a Dummy Consistent Hashing in Java using TreeMap
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Day 79: Did you know that too much print statement can cost you money
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Day 78: Java 22 - Embracing Safe Memory Allocation Using MemorySegment and Arena API - An alternative to Unsafe API
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Explore Something Unsafe : Crafting a Memory allocator using Java Unsafe API
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Implementing a dummy Service Oriented Architecture (SOA) service to Understand Java SPI
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Java Buffered Reader and why we need to close and what will happend if we dont
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Java Security: Crafting a toy TLS Server with Java Security API
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Java Security: Safeguarding Data with Encryption and Keys
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Can a HashMap Take Null or Empty String as a Key in Java?
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Understanding Heap poullion in java and its causes and how to prevent it.
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Measuring the performance of different array copying methods in Java using JMH
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Exploring benchmarking harness in Java and how its use to understand performance
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Finding memory leak by analyzing GC and memory dump using VisualVM and Eclipse MAT
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Finding memory leak by analyzing GC and memory dump using VisualVM and Eclipse MAT
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Finding memory leak by analyzing GC and memory dump using VisualVM and Eclipse MAT
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Understanding how RPC and RMI works in java
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Implementing a basic bloom filter to understand its concepts and usages using Java BitSet api
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Using JMX to write an alert system for Java JVM OutOfMemory Error
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Understanding JMX architecture and how it works.
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Understanding JMX architecture and how it works.
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Generating Heap dumps programatically by using MBeanServer and PlatformBeans to get Management information from JVM
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Understanding Proxy and Dynamic Proxy in Java
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Mocking void methods using ArgumentCapture and Answering
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Understanding details and compare use cases of Random, ThreadLocalRandom and SecureRandom
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What is zero length Array and why its in java and how its used
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Blue-Green Deployment using DNS to reduce downtime of production application
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Understanding java classe's static and instance initializer
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git troubleshooting with helpful commands to revert, stash, split, recover commits
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Understanding volatile keyword's use in incrementing a double variable and see how it behaves in multi threaded env