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Using the maven exec plugin to launch hsqldb

Below is a short snippet I use to launch hsqldb automatically for unit testing in my java projects.
Biggest limitation to the exec-maven-plugin is that it can’t run processes asynchronous. This way a running application is blocking the maven process flow. A big limitation. I think they should add an option to be able to run the process in a separate process without blocking the flow if needed.

Below is the snippet, I tried to use the windows start command. But it didn’t really work.

					<!-- Execute plugin to launch hsqldb -->
					<plugin>
						<groupId>org.codehaus.mojo</groupId>
						<artifactId>exec-maven-plugin</artifactId>
						<version>1.1</version>
						<executions>
							<execution>								
								<phase>compile</phase>							
								<goals>
									<goal>exec</goal>
								</goals>
							</execution>
						</executions>
						<configuration>	
						 <!--
								start java 
									-cp "c:/Documents and Settings/%USERNAME%/.m2/repository/hsqldb/hsqldb/1.8.0.7/hsqldb-1.8.0.7.jar" 
									org.hsqldb.Server 
									-database.0 mydb 
									-dbname.0 xdb							-->
							<!-- use start to execute in separate thread -->
							<executable>start</executable>
							<!-- optional -->
							<workingDirectory>/hsqldb</workingDirectory>
							<arguments>
								<argument>java</argument>
								<argument>-cp</argument>
								<argument>"C:/Documents and Settings/%USERNAME%/.m2/repository/hsqldb/hsqldb/1.8.0.7/hsqldb-1.8.0.7.jar"</argument>
								<argument>org.hsqldb.Server</argument>
								<argument>-database.0</argument>
								<argument>mydb</argument>
								<argument>-dbname.0</argument>
								<argument>xdb</argument>
							</arguments>
						</configuration>
						<dependencies>
							<dependency>
				    			<groupId>hsqldb</groupId>
				    			<artifactId>hsqldb</artifactId>
				    			<version>1.8.0.7</version>
 							</dependency>
						</dependencies>
					</plugin>
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