java qr code generator Understanding Ant integration in Java

Creation QR Code JIS X 0510 in Java Understanding Ant integration

APPENDIX B
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Understanding Ant integration
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[java] [java] [java] [java] [java] [java] [java] Apr 10, 2003 12:09:35 INFO: Entering Apr 10, 2003 12:09:35 INFO: Entering Apr 10, 2003 12:09:35 INFO: Entering Apr 10, 2003 12:09:35 addShoppingCartItem INFO: Entering Apr 10, 2003 12:09:35 INFO: Entering Apr 10, 2003 12:09:35 INFO: Entering Apr 10, 2003 12:09:35 addShoppingCartItem INFO: Entering Apr 10, 2003 12:09:35 INFO: Entering Apr 10, 2003 12:09:35 INFO: Entering AM Inventory addItem AM Inventory addItem AM Inventory addItem AM ShoppingCartOperator
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BUILD SUCCESSFUL Total time: 5 seconds
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If you want to compile the source files without running the program, you can issue the following command:
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> ant compile Buildfile: build.xml compile: [mkdir] Created dir: F:\aspectj-book\appendixB\sectionB.1\dest BUILD SUCCESSFUL Total time: 5 seconds
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If you do not have aspectjtools.jar as a part of your CLASSPATH environment variable, in order to make the resource properties file available to the Ant build file, you must copy aspectjtools.jar to $(ANT_HOME)/lib. The other choice is to specify the classpath nested element for the taskdef element, as shown here:
<taskdef resource= "org/aspectj/tools/ant/taskdefs/aspectjTaskdefs.properties"> <classpath> <pathelement location="${aspectj.dir}/lib/aspectjtools.jar"/> </classpath> </taskdef>
Weaving into JAR files using an Ant task
You will then have to specify the value for aspectj.dir either directly inside the build file or by passing it to the Ant invocation:
> ant -Daspectj.dir=C:\aspectj1.1 compile
Now let s turn our attention to the situation when your classpath does not include aspectjrt.jar. In this case, you will have to specify it explicitly to the compile and run targets, as shown here:
<target name="compile"> <mkdir dir="dest"/> <iajc destdir="dest"> <sourceroots> <pathelement location="shopping"/> <pathelement location="tracing"/> </sourceroots> <classpath> <pathelement path="${java.class.path}"/> <pathelement location="${aspectj.dir}/lib/aspectjrt.jar"/> </classpath> </iajc> </target> <target name="run" depends="compile"> <java classname="Test"> <classpath> <pathelement location="dest"/> <pathelement path="${java.class.path}"/> <pathelement location="${aspectj.dir}/lib/aspectjrt.jar"/> </classpath> </java> </target>
Just as in case of aspectjtools.jar, you must supply the value for aspectj.dir on the Ant command line, as follows:
> ant -Daspectj.dir=C:\aspectj1.1 compile
Now that you are familiar with compiling and running programs written in AspectJ, let s see how you can use the AspectJ Ant task for other jobs, such as creating and using libraries. We ll also look at setting the AspectJ Ant task to compile source files incrementally.
B.2 Weaving into JAR files using an Ant task
In section A.5, we studied the ajc command-line options for weaving aspects into a JAR file. In this section, we examine the Ant way of performing the same task.
APPENDIX B
Understanding Ant integration
The following Ant target weaves the aspects in the tracing directory into the shopping.jar file:
<target name="weave" depends="shopping-jar"> <mkdir dir="dest"/> <iajc destdir="dest"> <injars> <pathelement location="shopping.jar"/> </injars> <sourceroots> <pathelement location="tracing"/> </sourceroots> </iajc> </target>
If the input JAR files contain pure Java sources, you could use the javac task to compile them instead of iajc. For example, the shopping.jar file could be produced through the following Ant targets:
<target name="compile-shopping"> <mkdir dir="dest/shopping"/> <javac destdir="dest/shopping"> <src> <pathelement location="shopping"/> </src> </javac> </target> <target name="shopping-jar" depends="compile-shopping"> <jar destfile="shopping.jar" basedir="dest/shopping"/> </target>
B.3 Creating aspect libraries using an Ant task
Let s turn our focus to creating aspect libraries using Ant, which is equivalent in functionality to the command-line way in section A.6. Using the outjar attribute and the XnoWeave attribute, you can create an aspect library, which can be later woven into the rest of the system. The following Ant target creates tracing.jar by compiling all the sources inside the tracing directory:
<target name="trace-lib"> <iajc outjar="tracing.jar" XnoWeave="true"> <sourceroots> <pathelement location="tracing"/> </sourceroots> </iajc> </target>
Utilizing incremental compilation using an Ant task
Note that the XnoWeave attribute has the same function as the XnoWeave option discussed in section A.6.
B.4 Utilizing aspect libraries using an Ant task
In section A.7, we explored command-line options for using an aspect library created by employing the technique described in section A.6 (or B.3). Performing the same task in Ant requires you to specify the corresponding JAR file for the aspect library in the aspectpath nested element in the iajc task. If you need to weave the aspects inside the library JAR file, specify them inside the injars element as well:
<target name="compile" depends="trace-lib"> <mkdir dir="dest"/> <iajc destdir="dest"> <sourceroots> <pathelement location="shopping"/> </sourceroots> <injars> <pathelement location="tracing.jar"/> </injars> <aspectpath> <pathelement location="tracing.jar"/> </aspectpath> </iajc> </target>
You could weave the aspects in a library into a JAR file by specifying the target JAR file in the injars nested element:
<target name="compile" depends="trace-lib,shopping-jar"> <mkdir dir="dest"/> <iajc destdir="dest"> <injars> <pathelement location="shopping.jar"/> <pathelement location="tracing.jar"/> </injars> <aspectpath> <pathelement location="tracing.jar"/> </aspectpath> </iajc> </target>
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