How to build and deploy Living Apps (Best Practices)
Bonita Continuous Delivery enables you to easily build and deploy a Bonita Living Applications on a Bonita runtime.
It uses the Bonita Living Application Builder and the Bonita Living Application Deployer.
In the following, we present best practices and various use cases to let you easily build and deploy your Bonita Living Application repository.
All examples assume that:
you have cloned a Git repository as described in the Bonita Living Application Builder documentation
you have already defined a scenario file for Living Application management and stored it in the BCD
you already have a Bonita runtime up and running
Best practices about repositories
The Bonita Living Application Builder is made to build an entire Bonita repository.
It is usually pretty fast, but depending on the size of your repository, the amount of artifacts to build, it can become longer. To avoid such situations, there is some best practices about Bonita repositories that you should respect.
One repository per project
A Bonita repository should only contain artifacts related to a given project. For example, if you want to use Bonita to build a loan application and a leave request application, we strongly advise you to manage those two projects in two different repositories. It will allow you to build, deploy and test each project separately easily using Bonita Continuous Delivery.
A repository should only contain the resources and the dependencies required to build and deploy the Living Applications of the project. Resources not used by the Living Applications should not be in the repository of the project.
Use versioning to manage your history
During the life-cycle of a project, resources are brought to evolve. You may need to perform important changes on a process or on a Rest API extension for example. The best way to track the evolution is to use versioning.
Before to perform an important change on a resource, make sure to save the current state of your repository by creating a tag for example if you are using Git. Then you can increase the version of your resource and perform the change, knowing that you can easily do a rollback if needed.
We do not recommend to duplicate the resource in your repository. If you start to manage your versions this way, your repository will get bigger and bigger, and the time required by the Bonita Living Application Builder to build your repository will increase. Moreover, it is really painful to work on a repository containing all the history of a project, it can lead to many confusions and errors during the development ( dependency issues …).
The recommended way is definitively to keep the latest version of each resources in the working repository, and the history on your Version Control System.
Since the version 7.7.0 of Bonita, the popular Version Control System Git is integrated in Bonita Studio. It is a fine way to manage properly the versioning of your projects. The Bonita documentation provides an example on how to share a repository on GitHub.
Build and deploy straight
This is the simplest use case: you want to build a Bonita repository and deploy all associated resources.
To do so, you only have to pass the repository path to the build command and chain a deploy command without path parameter like in the following:
$ bcd -s <path/to/scenario> -y livingapp build -p <path/to/bonita/repository> -e <environment> deploy
This command will first build the Bonita repository for the given environment. The output of the build command are located in the target directory, created by the builder. The generated Application Archive and Configuration Artifact are then automatically used by the deploy command.
Make sure to add the
Build and select what to deploy
Sometimes, you may need to perform some actions between the build phase and the deploy phase. You may want to deploy only a subpart of the repository that has been built, or add some external resources in the application archive to deploy. Here are some hints on how to do it.
The idea is always the same:
Build a Bonita repository with BCD
Update the application or configuration artifacts created by the builder
Deploy the updated artifacts
First, we build the Bonita repository:
bcd -s <path/to/scenario> -y livingapp build -p <path/to/bonita/repository> -e <environment>
The build operation creates a target directory in the Bonita repository. Let’s move to this directory:
This directory contains built artifacts, including the application archive we want to update. Keep in mind that the deployer can take a zip file or a directory as input. So, we are going to unzip the raw application archive, in a to-deploy directory:
unzip -d to-deploy <bonita-repository-name>-<environment>-<timestamp>.zip
A new directory to-deploy has been createda and it contains all the built artifacts from your Bonita repository.
You can perform some actions on the content of this directory to customize your deployment. Here are some use cases:
Example 1: I only want to deploy the Business Data Model from my Bonita repository
In this example, we only want to deploy the BDM. The to-deploy directory should contain a subfolder bdm. We simply need to tell the deployer to deploy this subfolder as follows:
bcd -s <path/to/scenario> -y livingapp deploy -p <path/to/bonita/repository>/target/to-deploy/bdm
Example 2: I only want to deploy all the resources from my Bonita repository except applications
The to-deploy directory should contain a subfolder applications. We simply need to delete this subfolder, then tell the deployer to deploy the to-deploy directory as follows:
rm -rf <path/to/bonita/repository>/target/to-deploy/applications/ bcd -s <path/to/scenario> -y livingapp deploy -p <path/to/bonita/repository>/target/to-deploy
Example 3: I want to add some custom pages in the resources to deploy
This use case is a bit more advanced. Imagine that your Bonita repository is stored on a given Git repository and your custom pages used by your applications in an other Git repository. You will have to build your Bonita repository as described above, then to retrieve your custom pages (Git clone…) and to add them to the application archive to deploy.
Build and select how to deploy parts of the Application Archive
As described in the Bonita Living Application Deployer documentation, it is possible to pass to the deployer a deployment descriptor file. This file must be called deploy.json and be at the root of the application archive.
The deployment descriptor file is used to specify which resources have to be deployed, and with which policy. It is an alternative way to select a sub part of the application archive to deploy.
An interesting way to use it is to store some deployment descriptor files in your Bonita repository, one for each 'build and deploy' scenario you want to perform. Between the build and the deploy phase, just move the deployment descriptor file at the root of your application archive, as described above.
|The format of the deployment descriptor file might evolve in future versions to make it more user-friendly.|