Maven by Example
7.9. Running the Simple Command
The simple-command project is configured to create a single JAR
containing the bytecode of the project and all of the bytecode from
the dependencies. To create this assembly, run the assembly goal of
the Maven Assembly plugin from the simple-command project directory:
$ mvn assembly:assembly [INFO] ------------------------------------------------------------------------ [INFO] Building Multi-spring Chapter Simple Command Line Tool [INFO]task-segment: [assembly:assembly] (aggregator-style) [INFO] ------------------------------------------------------------------------ [INFO] [resources:resources] [INFO] Using default encoding to copy filtered resources. [INFO] [compiler:compile] [INFO] Nothing to compile - all classes are up to date [INFO] [resources:testResources] [INFO] Using default encoding to copy filtered resources. [INFO] [compiler:testCompile] [INFO] Nothing to compile - all classes are up to date [INFO] [surefire:test] ... [INFO] [jar:jar] [INFO] Building jar: .../simple-parent/simple-command/target/simple-command.jar [INFO] [assembly:assembly] [INFO] Processing DependencySet (output=) [INFO] Building jar: .../simple-parent/simple-command/target /simple-command-jar-with-dependencies.jar
The build progresses through the lifecycle compiling bytecode, running
tests, and finally building a JAR for the project. Then the
assembly:assembly goal creates a JAR with dependencies by unpacking
all of the dependencies to temporary directories and then collecting
all of the bytecode into a single JAR in target/ named
simple-command-jar-with-dependencies.jar. This "uber" JAR weighs in
at 15 MB.
Before you run the command-line tool, you will need to invoke the
hbm2ddl goal of the Hibernate3 plugin to create the HSQLDB
database. Do this by running the following command from the
simple-command directory:
$ mvn hibernate3:hbm2ddl [INFO] Scanning for projects... [INFO] Searching repository for plugin with prefix: 'hibernate3'. [INFO] org.codehaus.mojo: checking for updates from central [INFO] ------------------------------------------------------------------------ [INFO] Building Multi-spring Chapter Simple Command Line Tool [INFO]task-segment: [hibernate3:hbm2ddl] [INFO] ------------------------------------------------------------------------ [INFO] Preparing hibernate3:hbm2ddl ... 10:24:56,151 INFO org.hibernate.tool.hbm2ddl.SchemaExport - export complete [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESSFUL [INFO] ------------------------------------------------------------------------
Once you run this, you should see a data/ directory under
simple-command. This data/ directory holds the HSQLDB database. To
run the command-line weather forecaster, run the following from the
simple-command/ project directory:
$ java -cp target/simple-command-jar-with-dependencies.jar \
org.sonatype.mavenbook.weather.Main 60202
2321 INFO YahooRetriever - Retrieving Weather Data
2489 INFO YahooParser - Creating XML Reader
2581 INFO YahooParser - Parsing XML Response
2875 INFO WeatherFormatter - Formatting Weather Data
****************************************
Current Weather Conditions for:
Evanston,
IL,
US
****************************************
* Temperature: 75
* Condition: Partly Cloudy
* Humidity: 64
* Wind Chill: 75
* Date: Wed Aug 06 09:35:30 CDT 2008
To run a history query, execute the following command:
$ java -cp target/simple-command-jar-with-dependencies.jar \
org.sonatype.mavenbook.weather.Main 60202 history
2470 INFO WeatherFormatter - Formatting History Data
Weather History for:
Evanston, IL, US
****************************************
* Temperature: 39
* Condition: Heavy Rain
* Humidity: 93
* Wind Chill: 36
* Date: 2007-12-02 13:45:27.187
****************************************
* Temperature: 75
* Condition: Partly Cloudy
* Humidity: 64
* Wind Chill: 75
* Date: 2008-08-06 09:24:11.725
****************************************
* Temperature: 75
* Condition: Partly Cloudy
* Humidity: 64
* Wind Chill: 75
* Date: 2008-08-06 09:27:28.475