Download Developing Environment

Developing Environment
Olivier de Pertat
IT GROUP
Developing In Java
Text Editors
Java Compilers
Building Tools
Setting Your Environment
Logging Capabilities
Unit Testing
Java Compilers
Latest Java Version : 1.5
Latest J2EE Version : 1.4 (1.5 is comming)
Many Providers :
SUN : Solaris, Win32, Linux x86
IBM : AIX, Linux x86, Win32, Solaris, HP-UX, OS/390, z/Linux…
BEA : Linux iA64, Win32
HP : HP-UX
Non Compliant JVM :
Microsoft J++ & Many old JVM
Warning :
For JAKARTA products on Linux Operating Systems it might be useful to
use IBM JDK’s.
Old Microsoft JVM are not completely Java Compliant.
Building Tool : ANT
Command Line not suited to projects.
ANT :
Managed by XML File (build.xml).
Tag based Architecture.
Fully written in Java.
Runs on every OS that supports Java.
Extensible Application by development.
Not limitations like : Makefile, nmake, jam…
Developed by Jakarta from Apache Group.
An Industry Standard :
Used in IDE for Java Compilation : JBuilder, Jext, Emacs, JDE,
NetBeans, JEdit, Eclipse, Visual Age For Java, WSAD
AS : WebLogic (deployment handled by ANT)
ANT (1)
Tag Structure :
Main tag : Project
One “project” tag by build file.
Specifies the default task to perform.
Specifies the working directory.
Default file : Build.xml
<project name="j2ee-lesson" default="sys-about" basedir=".">
<target name="sys-about">
<echo>Hello World ! </echo>
</target>
</project>
Command line :
ant <target>
ANT (2)
Variable declaration :
<project name="j2ee-lesson" default="sys-about" basedir=".">
<!-- System variables -->
<property environment="myenv" />
<property name=" PATH“ value="${myenv.PATH}" />
<property name="SQL_FILE" value="test.tmp.sql" />
Java Compilation :
<target name="j2ee-mk-class" depends="">
<buildnumber />
<echo>Compiling Java Source</echo>
<javac srcdir="${src}" debug="yes“
destdir="${build}“
classpath="${PROJECT_CLASSPATH}"/>
</target>
ANT (3)
Java Execution :
<target name="run-MyHello" depends="j2ee-mk-class">
<java classname="mytest.MyHello" fork="yes">
<jvmarg value="${RUN_OPTION_1}" />
<classpath>
<pathelement path="${PROJECT_RUN_CLASSPATH}"/>
</classpath>
</java>
</target>
File Manipulation :
Create Directory : <mkdir dir="${build}" />
Delete files & directories : <delete dir="${build}" />
Copy, Move files & directories
Compression : gzip, zip, jar, bzip2, tar
Security : chmod
Others : checksum, basename, concat, touch
ANT (4)
System Tasks Execution :
<exec executable="j2ee.bat">
<env key="CLASSPATH" value="${J2EE_CLASSPATH}" />
<arg line="-verbose" />
</exec>
Network Services :
Mailing : mail
FTP : File transfer
RCS & CVS Management : cvs…
ANT (5)
SQL Commands (JDBC Way) :
<target name="sys-OracleSQL" depends="">
<sql driver="${ORACLE_DRIVER}"
url="${ORACLE_URL}" userid="${ORACLE_USER}"
password="${ORACLE_PASSWORD}"
classpath="${ORACLE_CLASSPATH}"
src="${SQL_SCRIPT}"
print="true" />
</target>
SQL Commands (SQL*Plus Way) :
<property name="DB_EXEC_ARGS"
value="${ORACLE_USER}/${ORACLE_PASSWORD}@${ORACLE_NAME}
@${SQL_SCRIPT}" />
<echo file="${SQL_SCRIPT}" append="true">exit;</echo>
<echo>${DB_EXEC_ARGS}</echo>
<exec dir="." executable="${ORACLE_SQLCMD}">
<arg line="${DB_EXEC_ARGS}" />
</exec>
Logging Capabilities
Traces are needed :
Development
Debugging
Production & problem tracking
System.out : is limited and not persistent (#define)
Logging APIs:
Jakarta’s Log4J: Production reference
Most used in projects
Powerful
JDK 1.4 logging APIs (JSR-47):
Standard Java API since 1.4 VMs
Sun’s reference
Jakarta Common Logging (JCL):
Wrapper API for : Log4J, JDK 1.4, Avalon LogKit, Pre 1.4 JDKs,
Common functionalities present but not specifics
Log4J
LOG4J :
Developed JAKARTA (Apache Group)
Logging system dynamically & statically configurable
high-performance Java API
Defined levels :
FATAL : logger.fatal(“string”)
ERROR : logger.error(“string”)
WARNING : logger.warn(“string”)
INFO : logger.info(“string”);
DEBUG : logger.debug(“string”)
LOG4J (2)
Import needed : org.apache.log4j.*;
Sample In Java :
static Logger logger =
Logger.getLogger(mytest.MyLoggedHello.class.getName());
public MyLoggedHello()
{
logger.fatal("FATAL : Constructor called !");
logger.error("ERROR : Constructor called !");
logger.warn( "WARN : Constructor called !");
logger.info( "INFO : Constructor called !");
logger.debug("DEBUG : Constructor called !");
}
LOG4J (3)
File configuration : Log4J.properties (Console)
log4j.rootCategory=DEBUG, A1
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
File configuration : Log4J.properties (File)
log4j.rootCategory=INFO,R
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=wstools-debug.log
log4j.appender.R.MaxFileSize=100KB
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n
JVM Arguments :
java -Dlog4j.configuration=file:/Log4J.properties MyProgam
JDK Logging
Sun’s Flogging Framework
Logger / LogManager Architecture
Package: java.util.logging.
Levels are:
Level.SEVERE
Level.WARNING
Level.INFO
Level.CONFIG
Level.FINE
Level.FINER
Level.FINEST
JDK Logging (2)
Handlers:
StreamHandlers
Console Handlers
File Handler
SocketHandler
MemoryHandler
Formatters:
SimpleFormatter: simple chars output
XMLFormatter: XML File format output
JVM Parameter:
java -Djava.util.logging.config.file=monLogging.properties
Unit Testing : JUnit
Unit Testing :
Non-regression tests
Improve quality
Speed-up code writing
JUnit :
Developed JAKARTA
Command-Line or Graphical.
Simple Java API.
Package : junit.framework
JUnit (2)
JUnit Java Sample :
public class CheckMyHello extends TestCase
{
…..
public void testAssertPosInfinityEqualsInfinity()
{
assertEquals(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY, 0.0);
}
public static Test suite()
{
TestSuite suite= new TestSuite();
suite.addTest(new TestSuite("testItSays"));
suite.addTest(new TestSuite(CheckMyHello.class));
suite.addTest(new TestSuite(CheckAssertTest.class));
return suite;
}
}
JUnit (3)
Running JUnit (Command Line) :
public static void main(String [] args) {
junit.textui.TestRunner.run(suite());
}
Running JUnit (Graphical) :
java junit.swingui.TestRunner mytest.CheckMyHello
JUnit (4)
Using Standard Output :
public void testItSays()
{
String lineSeparator = System.getProperty("line.separator");
ByteArrayOutputStream out4debug = new
ByteArrayOutputStream();
PrintStream out_new = new PrintStream(out4debug);
PrintStream out_bkp = System.out;
MyHello objectTested = null;
String outputExcepted = "Hello Object Built !" + lineSeparator;
System.setOut(out_new);
objectTested = new MyHello();
System.setOut(out_bkp);
assertTrue((out4debug.toString()).equals(outputExcepted));
}
ODP’s JavaBox (1)
Tool Box packaged for Java programming: Everything is included!
Nothing more is needed.
Java Standard Edition 1.4.2 (J2SE)
Java Entreprise Edition 1.4:
SUN Application Server:
Tools, libs…
2 Database Engine:
PointBase Server
HSQL DB
Java Text Editor: JExt (Color highlight)
ANT: asant
Some useful utilities:
Custom Windows Shell
UNIX Basic utilities: tail, zip, md5sum..
Why?
Simple.
No complex to understand IDE to learn.
Easy to install at work, at home… No special authorizations are needed to
install it. Even in a cyber coffee as a guest user it works!
Can be used for large projects.
ODP’s JavaBox (2)
Installation:
Unzip the archive to anywhere you want.
Run the SHELL named “JavaShell.cmd”. It automatically detects
whether or not installation has been processed.
Installation process is run once.
Installation is fast but can be slow down by Antivirus software
ODP’s JavaBox (3)
A virtual J: drive is mapped to your installation Directory.
Every source file should be placed in J:\src
To write your first program you should:
Launch a JavaShell
Launch JExt (thro ugh the shortcut placed in J:\bin)
Write your program
Save it to J:\src directory
Compile it by typing in the JavaShell:
J:\>asant make
Run it by typing in the JavaShell
J:\>java MyFirstProgram
Enjoy!