Packaging a Configured Instance as an Uber Jar

Sometimes it is preferable to package the application (or applications), configuration and dependencies into a single executable jar. To do this with Payara Micro Enterprise use the --outputUberJar command line option as in this example:

java -jar payara-micro.jar --deploy test.war --outputUberJar test.jar

This will package up the payara-micro.jar and the WAR application into a single JAR. The resulting file can be execute like this:

java -jar test.jar

Any additional command line options you specify when creating an Uber JAR are recorded, so the Payara Micro instance is configured later when executing the packaged JAR:

java -jar payara-micro.jar --deploy test.war --port 9080 --lite --clusterName test-cluster --clusterPassword test-password --outputUberJar test2.jar
All specified command line option will be retained when the Uber JAR is executed.

Uber JAR Context Root

When creating an Uber JAR, the context root of the packaged application will always be the name of the application WAR that is deployed. For example, the test.war that was packaged into the test2.jar on port 9080 would be accessible on the following path:


Currently, this is always the case; including when a context root is specified in a glassfish-web.xml deployment descriptor.

If the WAR file is renamed to ROOT.war and packaged as an Uber JAR, it will be deployed to the root context:

java -jar payara-micro.jar --deploy ROOT.war --port 9080 --outputUberJar test3.jar
java -jar test3.jar

The application will now be accessible on:


Package Additional Files

Since Payara Server

It’s also possible to package additional files into an Uber JAR, by using a custom root directory. You can run a Payara Micro instance first by generating the domain directory first using the --rootDir option first:

java -jar payara-micro.jar --rootDir /tmp/micro-dir/

You can then add files to the root directory like this:

> cd /tmp/micro-dir/
> ls -lsarth

total 784K
   0 drwxr-xr-x 1 root 197609    0 Mar 24 18:16 docroot
160K -rw-r--r-- 1 root 197609 158K Mar 24 18:16 __ds_jdbc_ra.rar
   0 drwxr-xr-x 1 root 197609    0 Mar 24 18:16 META-INF
160K -rw-r--r-- 1 root 197609 159K Mar 24 18:16 __cp_jdbc_ra.rar
160K -rw-r--r-- 1 root 197609 159K Mar 24 18:16 __xa_jdbc_ra.rar
160K -rw-r--r-- 1 root 197609 160K Mar 24 18:16 __dm_jdbc_ra.rar
   0 drwxr-xr-x 1 root 197609    0 Mar 24 18:17 autodeploy
   0 drwxr-xr-x 1 root 197609    0 Mar 24 18:20 lib
4.0K drwxr-xr-x 1 root 197609    0 Mar 30 19:22 config
128K drwxr-xr-x 1 root 197609    0 Mar 30 19:23 runtime

> cp ~/test-properties /tmp/micro-dir/config/.

And then, generate the Uber JAR using the modified root directory:

java -jar payara-micro.jar --rootDir /tmp/micro-dir/ --outputUberJar custom-micro.jar

You can verify that the files are located in the MICRO-INF/ directory:

> unzip -d custom-micro custom-micro.jar
> ls -lsarth custom-micro/** | grep

total 304K
1.0K -rw-r--r-- 1 fabio 197609   24 Apr  3 20:26
Additional JAR files that are placed in the ${PAYARA_INSTALL_DIR}/lib directory will be ignored when being packaged to the Uber JAR. To package additional JAR files into an Uber JAR, check the Adding Third Party JARs section