Index_E

E

EAI (Enterprise Application Integration), 2, 170-171, 178

ebXML (standards body), 43, 132

business process definition, 132

business process standards, 144

document templates and standards, 132

working group for consistent interface, 263

EJB containers, 28, 33

EJB environment, 233

EJB example class listing, 101

EJB patterns, 101-102, 108

EJBs (Enterprise JavaBeans) 28, 33, 68, 101-103, 106-109, 119

Apache Axis private instance variables for, 289

for business objects, 102

serialization and deserialization of, 109, 111

Email-based notification, 154, 191

Emulation, 248-249, 263

Enterprise application integration, 2, 170-171, 178

Environment for using this book, installing, 311-313

Equals method, on information snapshot, 182

Event Channel pattern (CORBA), 205

Event determination, client control of, 11

Event forwarding through physical tiers, 235

Event monitor, 11

application invocation of, 180

in the case study, 182-184

dangers of using, 177-178

explained, 169-170

on external services, 183

implementation class diagram, 179

implementing, 178-182

for integrating two application, 173

invoking, 179-180

many components using one instance of, 172

Observable interface, 175

places where clients may use, 182

posting changes to event bus, 171

in practice, 169-172

preparing to implement, 176-178

shortcomings of, 187

typically on its own thread, 175

Web Services and, 171-172

Event Monitor pattern, 169-186

Asynchronous Business Process pattern and, 167

collaborations, 175

components, 173-174

Observer pattern and, 185, 203

Publish/Subscribe pattern and, 176-177, 185, 222

structure, 172-175

Event publishing. See Publish/Subscribe pattern

Event service, 207-208, 235

as an application component, 11

implementation listing, 216-217

implementing, 215-217

with new subscriber, 239-241

publishing an event to, 218-219

registering with, 217-218, 257

Event subscriber (application-side) listing, 237

Event subscriber class diagram, 235

Event topics, 209-210

EventMonitor class, 174-177

EventMonitor class polling frequency, 176-177

EventService component (Publish/Subscribe), 210, 212

EventService interface, 207

EventService Web service, 214, 218, 253

EventServiceImpl component (Publish/Subscribe), 212

Examples in this book, deploying, 317

Execution time, and client's pain threshold, 159

Extents (API), 120

External Business Process patterns, calling, 159

External dependencies, event monitors and, 178

External integration projects, 5

External services, event monitors on, 183

Extreme programming, faux implementation and, 246