Intro
Table of Contents
About the Author
About the Technical Reviewer
Acknowledgments
The World at Scale
Introduction
Part I: The Reactive Movement and R2DBC
Chapter 1: The Case for Reactive Programming
A Traditional Approach
Imperative vs. Declarative Programming
Thinking Reactively
The Reactive Manifesto
Reactive Systems
Reactive Systems!= Reactive Programming
Asynchronous Data Streams
Data Streams
Back Pressure
Summary
Chapter 2: Introduction to R2DBC
What Is R2DBC?
A New Approach
Beyond JDBC
R2DBC Implementations

Embracing Reactive Programming
Enabling Vendor Creativity
Enforcing Compliance
Reactive Streams
Another Specification
API Fundamentals
Processors
JVM Interfaces
Implementations
Summary
Part II: The R2DBC Service-Provider Interface
Chapter 3: The Path to Implementation
The Database Landscape
Power in Simplicity
R2DBC Compliance
Guiding Principles
Specification Implementation Requirements
Specification Extensions
Wrapped Interfaces
Closeable Interfaces
Testing and Validation
Summary
Chapter 4: Connections
Establishing Connections

The Anatomy
R2DBC Hindsight
Connection Factory
Driver Implementations
Exposing Metadata
ConnectionFactories
Discovery
Bringing It All Together
Connections
Obtaining Connections
Acquiring Metadata
Validating Connections
Closing Connections
Summary
Chapter 5: Transactions
Transaction Fundamentals
The Need for Transactions
ACID Compliance
Methods of Control
Committing Transactions
Rolling Back Transactions
Savepoints
R2DBC Transaction Management
Auto-commit Mode
Explicit Transactions
Committing Transactions

Rolling Back Transactions
Managing Savepoints
Releasing Savepoints
Isolation Levels
Managing Isolation
Performance Considerations
Summary
Chapter 6: Statements
SQL Statements
R2DBC Statements
The Basics
Creating Statements
Running Statements
Sneak Peek
Dynamic Input
Creating Parameterized Statements
Binding Parameters
Batching Statements
Using Null Values
Auto-generated Values
Performance Hints
Summary
Chapter 7: Handling Results
The Fundamentals
Consuming Results
Cursors
Update Count
Rows and Columns
Row Anatomy

Retrieving Values
Generic Objects
Specifying Types
Multiple Columns
Summary
Chapter 8: Result Metadata
Data About Data
Row Metadata
Column Metadata
Required Methods
Optional Methods
getJavaType
getNativeTypeMetadata
getNullability
getPrecision
getScale
Retrieving Metadata
Obtaining a RowMetadata Object
Accessing ColumnMetadata
Summary
Chapter 9: Mapping Data Types
Data Type Differences
Mapping Simple Data Types
Character Types
Boolean Types
Binary Types
Numeric Types
DateTime Types
Collection Types