Apress Beginning WSO2 ESB 1st edition by Kasun Indrasiri ISBN 9781484223420 148422342X

Chapter 1: Introduction to WSO2 ESB

What is an ESB?

Core Functionalities of an ESB

Why WSO2 ESB?

Interoperability and EIP Support: Connecting Anything to Anything

Performance and Stability: The Fastest Open Source ESB

The Platform Advantage: Part of the WSO2 Middleware Platform

How does WSO2 ESB Work?

Functional Components

Message Entry Points: Proxy Service, APIs, and Inbound Endpoints

Message Processing Unit: Sequences and Mediators

Message Exit Points: Outbound Endpoints

WSO2 ESB Configuration Language

How to Try the Use Cases in this Book

Summary

Chapter 2: Getting Started with WSO2 ESB

Designing a Simple Integration Scenario with WSO2 ESB

Building the Integration Scenario

Creating a HTTP Service/API in WSO2 ESB

Creating the Request Sent to the Backend Service

Sending the Request to the Backend Service

Transforming and Sending the Response Back to the Client

Try it Out

Summary

Chapter 3: Fundamentals of WSO2 ESB

Message Entry Points

Using Proxy Services

Using APIs/HTTP Services

Using Inbound Endpoints

Polling Inbound Endpoints

Listening Inbound Endpoints

Message Processing Unit: Sequence and Mediators

Sequences

Mediators

Content Unaware Mediation

Content Aware Mediation with SOAP or JSON

Content Aware Mediation with Canonical Format

Message Exit Points: Outbound Endpoints

Endpoint Types

Address Endpoint

HTTP Endpoint

Load Balancing and Fail-Over Endpoint

Understanding Endpoint States and Endpoint Attributes

ACTIVE State

TIMEOUT State

SUSPENDED State

Default Configuration and Disabling Endpoint Suspension

Scheduled Tasks

Summary

Chapter 4: Processing Messages with WSO2 ESB

Pass-Through Messaging

Message Filtering and Switching

Message Filtering

Message Switching

Message Transformations

Using PayloadFactory Mediator

Using PayloadFactory and For-Each Mediator

Data Mapper Mediator

Using XSLT Mediator

Using the Header Mediator

Message Enriching

Message Validation

Service Orchestration

Service Chaining

Split and Aggregate Pattern

Clone and Aggregate Pattern

Changing the Message Protocol and Format

Protocol Conversions

Message Format Conversions

Using Properties in the Message Flow

Set/Retrieve Variables in the Message Flow

Use Predefined Properties to Control Message Flow

Summary

Chapter 5: Integrating SOAP and RESTful Web Services

Understanding SOAP and RESTful Web Services

Integrating SOAP Web Services

Exposing a SOAP Web Service Interface from WSO2 ESB

Exposing a SOAP Web Service in Front of a Legacy Non-SOAP (PoX) Based Service

Exposing a SOAP Web Service with WS-Addressing

Exposing a SOAP 1.2 Web Service on Top of a SOAP 1.1 Web Service

Invoking SOAP Backend Web Services from ESB

Integrating RESTful Web Services

Exposing RESTful Services/APIs with WSO2 ESB

Fundamentals of REST APIs

Invoking RESTful Services from WSO2 ESB

Using HTTP Endpoint for RESTful Service Invocations

Native JSON Support

Summary

Chapter 6: Enterprise Messaging with JMS, AMQP, MQTT, and Kafka

Integration with JMS-Based MoM

ESB as a JMS Consumer

ESB as a JMS Producer

Two-Way JMS

Using JMS Transactions

Store and Forward with Message Stores and Message Processors

Integrating with AMQP, MQTT and Kafka

Using AMQP with RabbitMQ

Integrating with MQTT

Integrating with Kafka

Summary

Chapter 7: File-Based Integration

Reading Files

Reading a File from the Local File System

Failure Tracking

Reading Files from an FTP or FTP/s

Reading Files from an SFTP

FTP or SFTP Through a Proxy Server

Writing Files

Writing Files with VFS Transport

Transferring Files

Message Transformation with File Integration

File Connector

Protocol Transformation from File to JMS

Summary

Chapter 8: Integrating Applications, Cloud Services, and Data

Integrating Proprietary Systems

SAP Integration

IDOC-Based Integration

Receiving IDocs

Sending IDocs

BAPI-Based Integration

Invoking BAPIs

Exposing BAPI Interfaces

HL7 Integration

Receiving HL7 Messages

Receiving HL7 Messages with Auto ACK

Receiving HL7 Messages with Application ACK

Sending HL7 Messages

FHIR-Based Integration

WebSockets Support

WebSockets to WebSocket Integration

WebSockets to WebSocket Integration with Frame Broadcasting

WebSockets to WebSocket Integration with Data Mapping

WebSockets to HTTP Integration

HTTP to WebSockets Integration

In-JVM Calls with Local Transport

Integrating Cloud Services

What is an ESB Connector?

Structure of an ESB Connector

Using an ESB Connector

Inbound Connectors

Integrating Salesforce and SAP

Data Integration

Summary

Chapter 9: Security in WSO2 ESB

Transport Level Security

One-Way SSL (Server Authentication)

Two-Way SSL (Mutual/Client Authentication)

Using TLS/SSL with WSO2 ESB

Use Case 1: Client to ESB: One-Way SSL

Use Case 2: Client to ESB: Two-Way SSL

Use Case 3: ESB to Service: One-Way SSL

Use Case 4: ESB to Service: Two-Way SSL

SSL Profiles

Application Level Security

Securing REST APIs

Securing Proxy Services

Invoking Secured Service

Invoking Basic-Auth and OAuth 2.0-Based Services

Invoking WS-Security-Based Services

OAuth Mediator: Access Token Validation Inside a Mediation Flow

Entitlement Mediator: Policy Enforcement Inside a Mediation Flow

Summary

Chapter 10: Development and Deployment Methodology

Development Methodology

Using the WSO2 ESB Development Tool

ESB Config Project

ESB Registry Resource Project

Importing Connectors to ESB Tool

Composite Application Project

Data Mapper

Mediation Debugger

Deploying Artifacts Across Multiple Environments

Deployment Methodology

Summary

Chapter 11: Administrating and Extending WSO2 ESB

WSO2 ESB Analytics

Monitoring

Extending WSO2 ESB

Class Mediator

Script Mediator

Custom Connector

Other Extensions

Error Handling

Summary