This repository contains an example of Spring Boot Application with implementation of:

1. XSUAA security integration
2. Multitenancy: Tenant-onboarding, Schema-Per-Tenant data Isolation
3. SAP HANA Cloud integration
4. MTA-based configuration
5. Liquibase integration

MTA Applications are delivered to SAP BTP platform as a .mtar archive

First of all you need to install multiapps plugin to CF CLI tool.

cf add-plugin-repo CF-Community https://plugins.cloudfoundry.org
cf install-plugin multiapps

and install mbt plugin

npm install -g mbt

Perform mbt build in the root folder of repository. Resulting archive should be placed in mta_archives directory.

Perform cf deploy <path_to_mtar_file> command.

The process and result of deployment process will be logged into the console. If something went wrong, the most convenient way to find an issue is to look into the logs of deployed application.

To allow application to perform multitenant logic you should provide used of deployed permission to manage schemas. You can find the user in binding of deployed application.

Perform this query in Database Explorer: GRANT CREATE SCHEMA TO <username>

Each application consumer requires route to be configured:
cf map-route <app-name> cfapps.us10-001.hana.ondemand.com --hostname <subaccount-subdomaint>-<app-name>
source

JwtDecoder bean requires RestOperations bean to be available in the context. RestOperations requires htppclient5 dependency which can be not provided automatically.

@Bean
	@ConditionalOnMissingBean
	@ConditionalOnClass(name = "org.apache.hc.client5.http.impl.classic.CloseableHttpClient")
	@ConditionalOnBean(XsuaaServiceConfiguration.class)
	public RestOperations xsuaaMtlsRestOperations(XsuaaServiceConfiguration xsuaaServiceConfiguration) {
		return SpringHttpClientFactory.createRestTemplate(xsuaaServiceConfiguration.getClientIdentity());
	}

To fix this add to pom.xml:

<dependency>
    <groupId>org.apache.httpcomponents.client5</groupId>
    <artifactId>httpclient5</artifactId>
    <version>5.3.1</version>
</dependency>