L

LAN (Local Area Network), 371

late binding, messages

XML messaging, 454

latency, 374

latency hiding, MOM, 12

overview, clustering, 374

LDAP (Lightweight Directory Access Protocol)

configuring server using SonicMQ, portable JMS client example, 560

listeners

exceptions, see exception listeners.

log events, see log event listeners.

messages, see message listeners.

load balancing, 393

connections, balancing, 394

connection brokers, 395

dynamic load balancing, 396

IP redirection, 394

dynamic, 396

load monitoring, 393

overview, clustering, 393

static, 393

storage, balancing, 397

Local Area Network, see LAN.

log event listeners, JLog, 417

class diagram, 417

ILogEventListener interface, implementing, 417

ILogEventWriter interface, implementing, 417

ILogFilter interface, implementing, 418

ILogFormatter interface, implementing, 418

JMSLogWriter class, JMS implementation, 419

log event producers, JLog, 418

class diagram, 418

ILogEventProducer interface, implementing, 418

ILogReader interface, implementing, 418

JMSLogReader class, JMS implementation, 419

Log object, JLog, 418

logging program example, using JMS & JLog, 420

build.xml script, 413

code listing, 421

configuring JMS objects in WebLogic, 425

requirements, 420

running as publisher/subscriber, 426

topic connections, creating, 421

logging service example, using JMS & JLog, 428

API, JavaDoc, 436

build.xml script, 413

class diagram, 435

configuration, XML file, 430

<DISTRIBUTED> element, 432

elements/tags, 431

<LOG> element, 432

<MEDIA> element, 433

debugging, 448

methods, 448

dynamical configuring, using JMS, 449

diagram, 449

onMessage() method, 449

setupLogServiceConfig() method, 449

EJB using service, example, 443

code listing, 444

running, 445

high-level diagram, 428

initialization, JLog components, 433

factory objects, creating event listeners/producers & filters, 435

LogProperties class, 435

requirements, 430

servlet using service, example, 437

code listing, 437

configuration files, copying/creating new, 440

installing, web.xml file, 438

running, 442

system properties & classpath, setting, 441

WAR file, building, 439

testing, using GUI configurator, 450

logging, distributed, 409

examples using JMS & JLog, 428

JLog logging tool, 411

JMS advantages, 410

overview, 451

server clustering & distributed logging, 410

loosely coupled systems, 20

features, 21

global flowers delivery example, 24

inserting JMS into distributed systems, 22

overview, 20

peer-to-peer vs. client/server models, 23

stock price distribution example, 28

tightly coupled systems and, 22

XML messaging, 454