Javaâ¢ Application Development on Linux - Dator

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488Chapter 21Introduction to Enterprise JavaBeansExample 21.1 A sample JNDI applicationimport java.util.*;import javax.naming.*;import javax.naming.directory.*;5public class GetDomain {private Hashtable env = new Hashtable();private DirContext dctx;private String domainQuery;10public GetDomain(String dom2Query) throws NamingException {domainQuery = dom2Query;env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.dns.DnsContextFactory");dctx = new InitialDirContext(env);15 }20public NamingEnumeration getDomainMembers() throws NamingException {return dctx.list(domainQuery);}public static void main(String[] args) {GetDomain gd = null;NamingEnumeration ne = null;25 try {gd = new GetDomain(args[0]);ne = gd.getDomainMembers();while (ne.hasMore()) {30 Object o = ne.next();System.out.println("Object ["+o+"]");}} catch (Exception e) {35 e.printStackTrace();}}}40
21.3 What’s in a Name? An Introduction to JNDI489Example 21.2 is what we get when we run this program against one of theauthor’s DNS domains. 7Example 21.2 Running GetDomain against the multitool.net domain[mschwarz@cassidy simpleApp]$ java GetDomain multitool.netObject [baroni: java.lang.Object]Object [erik: java.lang.Object]Object [www: java.lang.Object]Object [class: java.lang.Object]Object [jboss: java.lang.Object]Object [penguin: java.lang.Object]Object [mail: java.lang.Object]Object [cvs: java.lang.Object]Object [stiletto: java.lang.Object]Object [penfold: java.lang.Object]Object [ns2: java.lang.Object]Object [ns1: java.lang.Object]Object [irc: java.lang.Object][mschwarz@cassidy simpleApp]$The GetDomain main() method. This is another “single class” programexample. In this case, the main() method creates an instance of the class,passing the first command-line argument to the constructor. We’ll cover theconstructor in the next section. By now, you will recognize that this is one ofthe purely pedagogical examples. Note the complete lack of input validationand error checking on the number and content of the command-line arguments.Establishing an initial context. For both naming and directory services, itis necessary to establish an initial context. A context is a collected set of names.A directory system is a connected set of contexts. Our example is for DNS.We must set an initial context for DNS. The class constructor (lines 11–15)does that.7. Note that directory operations in the JNDI DNS Service Provider Interface are done withDNS zone transfers. Many domains, especially large domains, disable zone transfers either forsecurity reasons, or because they generate a lot of network traffic and are a popular tool forDenial of Service (DoS) attacks on name servers. To put it simply: This program won’t workon a lot of domains, especially from outside.
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Java Application
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Java Application
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To my mother, for her love of words
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viiiContents1.41.51.6Chapter 22.12.
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xContents5.65.75.85.95.105.115.125.
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xiiContentsChapter 99.19.29.39.49.5
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xivContentsChapter 1313.113.213.313
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xviContentsChapter 1717.117.217.317
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xviiiContents20.620.720.820.920.102
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PrefaceJAVA AND LINUXWhy another bo
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PrefacexxiiiFREE SOFTWARE AND JAVAG
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Prefacexxvand Tyrrell Albaugh, who
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xxviiiIntroductionIf you are an exp
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xxxIntroductionThe Linux Newbie Pat
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Part IGetting Started
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4Chapter 1An Embarrassment of Riche
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10Chapter 1An Embarrassment of Rich
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Chapter 2An Embarrassment of Riches
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2.2 Eye to Eye with vi35of their co
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2.2 Eye to Eye with vi37• L (“l
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2.2 Eye to Eye with vi39In both cas
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2.2 Eye to Eye with vi41• :7,.w!
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2.2 Eye to Eye with vi431,$s/Tryout
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2.3 Editors Galore45affected by thi
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2.3 Editors Galore47has a huge lear
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2.6 Resources49• fte is an editor
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52Chapter 3An Experienced Programme
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100Chapter 4Where Am I? Execution C
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116Chapter 5The Sun Microsystems Ja
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168Chapter 6The IBM Developer Kit f
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Chapter 7The GNU Compiler for Java(
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7.4 Compiling Our Simple Ap
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7.4 Compiling Our Simple Ap
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7.5 Options and Switches1857.5OPTIO
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7.9 What You Still Don’t Know187o
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Chapter 8Know What You Have:CVSSour
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8.2 Source Control: Whys and Hows19
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8.3 A GUI: jCVS211and the differenc
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8.4 Review213Figure 8.7 jCVS checko
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Chapter 9Ant:An IntroductionAnt 1 i
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9.3 Obtaining and Installing Ant217
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9.3 Obtaining and Installing Ant219
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9.4 A Sample Ant Buildfile221standa
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9.4 A Sample Ant Buildfile2239.4.2.
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9.4 A Sample Ant Buildfile225$ antB
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9.4 A Sample Ant Buildfile227debugI
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9.4 A Sample Ant Buildfile229Exampl
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9.4 A Sample Ant Buildfile231Runnin
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9.7 Resources233• O’Reilly has
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236Chapter 10Integrated Dev
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Chapter 11Balancing Acts:An Imagina
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11.3 How to Develop Software265soft
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11.4 What Makes a Good Requirement2
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11.6 Requirements for the Budget <s
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11.6 Requirements for the Budget <s
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11.7 Documenting, Prototyping, and
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11.7 Documenting, Prototyping, and
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11.11 Exercises277• http://www.pr
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Chapter 12Analysis and Design:Seeki
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12.4 Finding the Objects281Accounta
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12.5 Finding the Methods and Attrib
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12.6 Essential and Nonessential285
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12.7 Analysis Paralysis287• Class
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12.12 Resources28912.9CORE CLASSESS
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12.12 Resources291if (dbConn != nul
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12.13 Exercises293Example 12.2 The
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296Chapter 13JUnit: Automating Unit
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Chapter 14Storing the DataIn this c
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14.5 Oracle, PostgreSQL, MySQL31714
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14.7 Beyond the Basics319files, and
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14.7 Beyond the Basics321Hibernate
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14.9 Setting Up PostgreSQL for Budg
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14.10 Review32514.9.4 Straight JDBC
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Chapter 15Accessing the Data:An Int
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15.3 Making Connections329These thr
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15.3 Making Connections331Example 1
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15.4 Querying Data333// queryString
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15.5 Getting Results335TIPThe case
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15.9 Resources337We haven’t cover
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Part IIIDevelopingGraphical User In
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342Chapter 16Getting in the Swing o
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378Chapter 17Other Ways: Alternativ
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Part IVDevelopingWeb Interfaces
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404Chapter 18Servlets: Java Pressed
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Chapter 19JSP:Servlets Turned Insid
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19.2 Servlets Turned Inside Out: JS
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19.3 How to Write a JSP App
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Page 471 and 472: 19.5 Review439into JSP files. The m
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Page 547 and 548: 23.3 Deploying the EAR515automatic
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Page 551: 23.8 Resources519Ant and CVS and ho
Page 554 and 555: 522Chapter 24Parting ShotsThe three
Page 556 and 557: 524Chapter 24Parting ShotsPrentice
Page 558 and 559: 526Appendix AASCII ChartInt Oct Hex
Page 560 and 561: 528Appendix BA Java Swing GUI for B
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Appendix CGNUGeneral Public License
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C.2 Terms and Conditions for Copyin
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C.2 Terms and Conditions for Copyin
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C.3 NO WARRANTY545of this License,
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C.5 How to Apply These Terms to You
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550Index$ (dollar)in format fields,
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552Indexbreak statement, 67, 74-75b
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554IndexCVS_RSH environment variabl
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556IndexFfail(), 307false constant,
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558IndexIBM, 236, 377, 518Common Pu
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560IndexJNDI (Java Naming and Direc
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562IndexNetBeans (continued)running
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564IndexScrollBar class, 385search
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566IndexTable class, 386, 394-395ta
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