Java Internals

Introduction
Multi-Threading

• Basics of Threads
  • hreading Background
    • Threading Models
    • Process vs thread
    • Parallel vs concurrent
  • Creating New
    • Thread Groups
    • States
  • Synchronized
  • Locks
  • Priorities
  • Timers
  • Daemon Threads
• The Secrets of Concurrency
  • Interrupted Status
  • What threads are doing
  • Limiting number of Threads
  • Visibility Problem
  • Early Writes
  • Corrupt Data
  • Contention
  • Java Memory Model
  • Hardware impact
  • Deadlocks
• Applied Threading Techniques
  • Executors
  • Count-down latch
  • Semaphore
  • Blocking queues
  • Atomic Variable
  • Volatile
  • Exceptions
  • Thread local variables
  • Stopping Threads
  • Shutdown hooks
• Threading Problems
  • Race Conditions
  • Starvation
  • Fairness
  • Deadlock
  • Livelock

Introduction to Advanced Concurrency

• Creating and understanding Thread pools
• Why doesn't Double check lock work?
• Optimistic memory locks (CAS)
• True meaning of "final"
• True meaning of "volatile"
• True meaning of "synchronized"

Data Structures and Introduction to Concurrent Data Structures

• Basics
  • Introduction
  • Abstract Classes
  • Algorithm Complexity
  • Data Structures & GC
  • Primitive Data Structures
  • Null Elements
  • Type Safetyl
• Iteration
  • Iterators
  • Efficiency
  • RandomAccess
  • Multithreading
  • ConcurrentModification
  • CopyOnWrite Collections
  • New "for-each" iteration
  • Iterable interface
• Sorting
  • Collections & Arrays
  • Sorting Performance
  • Comparisons
  • Maps
  • Trees
  • Hashing
    • JDK 1.4+ rehashing
  • Compound Keys
  • Map of Maps
  • ConcurrentHashMap
  • Linked Maps
  • Searching
• Generics
• Other Structures
  • Multimap
  • Queues
  • Deques
  • Heaps
  • LRU Cache

Java Transaction Internals

• Introduction
• ACID
• Transaction Basics
  • Atomic
  • Consistent
  • Isolated
  • Durable
  • Types of Concurrency
    • Pessimistic
    • Optimistic
  • Resource Local Transaction
  • Distributed Transaction
    • XA
    • 2PC
  • Transaction Logs
  • Heuristics
  • Managed Transactions
  • JEE components interaction with transaction

Java IO

• IO Internals
  • Understand the class design for Java IO (First major reason why developers feel IO in java is complex)
  • Demystify Charset handling (Second major reason why developers feel IO in java is complex)
  • Use of Streams
  • File Streams
  • Data Streams
  • Network Streams
  • Object Streams
  • Readers and Writers
• Object Streams and Serialization
  • Object Serialization
  • Simple Object Serialization
  • Serializable Fields
  • readObject() / writeObject()
  • Controlling Serialization
  • Externalizable
  • Serial Object Versioning
  • Compatible Class Changes
  • Incompatible Class Changes
  • Overriding Versioning
  • Circular References
  • Serialization Performance
  • Serialization Pitfalls
  • Resetting Streams

Design and Implementation Techniques

• Static Factories
• Singletons
• Duplicate Objects
• Eliminate Obsolete Object references
• Finalizers
• Internals of Clone
• Minimizing Accessibility
• Immutability
• Object Composition
• Designing for inheritance
• Serialization as a Security Threat
• Serialization with inheritance
• Serialization and immutability
• Enums

Java Memory

• Garbage Collection
• Overview
• Generational Spaces
• GC Tasks
• Heap Fragmentation
• GC Pros and Cons
• Algorithms
  • Reachability
  • History
  • JVM 1.4, 5, 6
  • Young Space
  • Old Space
  • Summary
• Measuring GC Activity
• Behavior Based Tuning

Class-loading

• Introduction
• Class Loading Basics
• Three Stages of classloading
  • Loading
  • Linking
  • Initialization
• Isolation
• Delegation
  • What happens when delegation is not followed
• Class Visibility Rules
• Changing the rules of default class visibility
• Rules for Unloading Classes
• Why do we need Class Loaders?

Advanced Class loading

• Protecting Package Boundaries
• Understanding Illegal Access Issues
• Understanding Class Cast issues
• Understanding Linkage Error Issues
• Peer Class Loading
• Common Class loading Issues
• Custom Class Loaders
• Diagnosing and resolving class loading problems
• Dynamic Reloading of Classes

Reflection

• Downcasting
• "instanceof" keyword
• "class" object
• Using reflection
• Calling private methods
• Dynamic proxy

Invoke Dynamic

• First Taste
• The problem
• JVM Bytecode
• The Trick
• Knowing Bytecode
• Better mousetrap
• Anonymous ClassLoader
• Parametric Explosion
• Method Handles
• Brief History
• Invoke Dynamic