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Getting Started

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Introduction​

To get started with the SAP Cloud SDK for Java you can either create a new project or integrate the SAP Cloud SDK into your existing one. You will need an installation of Java and Maven.

Java version compatibility

The SAP Cloud SDK is compatible with all current Long-Term-Support (LTS) releases of Java: 8, 11 and 17. Other Java versions may work as well depending on your setup but are not yet tested by us. Note that the SAP Business Technology Platform Cloud Foundry environment only supports Java 8 out of the box but can be configured to also run with Java 11 or 17. SAP Business Technology Platform Neo only supports Java 8.

To start with a clean, new project you can select one of our archetypes and build upon it. Alternatively, you can follow these instructions to integrate the SAP Cloud SDK into your existing setup.

Generating a Project from a Maven Archetype​

The SAP Cloud SDK provides archetypes based on Spring.

Run:

mvn archetype:generate "-DarchetypeGroupId=com.sap.cloud.sdk.archetypes" \
    "-DarchetypeArtifactId=scp-cf-spring" \
    "-DarchetypeVersion=RELEASE"

Maven will ask you to provide the following:

  • groupId - usually serves as your organization identifier, i.e. foo.bar.cloud.app
  • artifactId - it's your application's name, i.e. mydreamapp
  • version - we recommend keeping 1.0-SNAPSHOT if you're just starting
  • package - by default this equals to groupId. Change it only if you know what you're doing

After providing all the interactive values to the CLI it will generate your first SAP Cloud SDK based application:

[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< org.apache.maven:standalone-pom >-------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] >>> maven-archetype-plugin:3.1.2:generate (default-cli) > generate-sources @ standalone-pom >>>
[INFO]
[INFO] <<< maven-archetype-plugin:3.1.2:generate (default-cli) < generate-sources @ standalone-pom <<<
[INFO]
[INFO]
[INFO] --- maven-archetype-plugin:3.1.2:generate (default-cli) @ standalone-pom ---
[INFO] Generating project in Interactive mode
[INFO] ....
[INFO] ....
Define value for property 'groupId': foo.bar.cloud.app
Define value for property 'artifactId' (should match expression '[^_]+'): mydreamapp
[INFO] Using property: artifactId = mydreamapp
Define value for property 'version' 1.0-SNAPSHOT: :
Define value for property 'package' foo.bar.cloud.app: :
[INFO] Using property: gitignore = .gitignore
[INFO] Using property: skipUsageAnalytics = false
Confirm properties configuration:
groupId: foo.bar.cloud.app
artifactId: mydreamapp
artifactId: mydreamapp
version: 1.0-SNAPSHOT
package: foo.bar.cloud.app
gitignore: .gitignore
skipUsageAnalytics: false
 Y: :
[INFO] ----------------------------------------------------------------------------
[INFO] Using following parameters for creating project from Archetype: scp-cf-spring:RELEASE
[INFO] ----------------------------------------------------------------------------
[INFO] Parameter: groupId, Value: foo.bar.cloud.app
[INFO] Parameter: artifactId, Value: mydreamapp
[INFO] Parameter: version, Value: 1.0-SNAPSHOT
[INFO] Parameter: package, Value: foo.bar.cloud.app
[INFO] Parameter: packageInPathFormat, Value: foo/bar/cloud/app
[INFO] Parameter: package, Value: foo.bar.cloud.app
[INFO] Parameter: version, Value: 1.0-SNAPSHOT
[INFO] Parameter: groupId, Value: foo.bar.cloud.app
[INFO] Parameter: skipUsageAnalytics, Value: false
[INFO] Parameter: gitignore, Value: .gitignore
[INFO] Parameter: artifactId, Value: mydreamapp
[INFO] Project created from Archetype in dir: /home/user/dev/temp/mydreamapp
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  02:28 min
[INFO] Finished at: 2020-04-19T19:25:33+02:00
[INFO] ------------------------------------------------------------------------

Congratulations! You've just set up a brand-new application with the SAP Cloud SDK for Java.

tip

To change the Java version modify the <java.version> property in the root pom.xml.

Run App Locally​

Applications created with our SAP Cloud SDK Archetypes give you the possibility to run locally on your development machine.

mvn clean install
cd application/
mvn spring-boot:run -D"spring-boot.run.profiles"=local

Deploy to Cloud Foundry​

Assuming you have installed the Cloud Foundry CLI and are logged into your BTP account you can deploy the app via:

cf push
Authentication & Authorization

Please note that the starter project does not come with any authentication or authorization checks enabled by default. This enables you to get started quickly and run locally without further configuration.

However, we recommend securing your application as early as possible in the development process. The archetypes already come preconfigured for typical authorization scenarios. Following this guide you can secure your newly created application in just a few steps.

Integrate the SAP Cloud SDK for Java Into Your Project​

Adding Dependencies​

tip

The SAP Cloud SDK integrates with CAP projects! Follow the steps below or check out the dedicated tutorial on SAP Developers.

To get started with an existing project include the SAP Cloud SDK BOM in the dependency management section of your project:

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>com.sap.cloud.sdk</groupId>
            <artifactId>sdk-bom</artifactId>
            <version>use-latest-version-here</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

If your application is running on SAP Business Technology Platform please add the appropriate dependency:

<dependency>
    <groupId>com.sap.cloud.sdk.cloudplatform</groupId>
    <artifactId>scp-cf</artifactId>
</dependency>

If you want to connect to an SAP S/4HANA system via the OData protocol, you should checkout our convenient OData code generator. By downloading the OData service specifications for either type of SAP S/4HANA system (SAP S/4HANA Cloud or SAP S/4HANA On-premise) you can generate your own set of classes. Similarly the SAP Cloud SDK offers a code generator for Open API protocol.

In case you have a CAP application which uses multitenancy features and/or a protected backend your service will need the following dependency:

<dependency>
  <groupId>com.sap.cds</groupId>
  <artifactId>cds-integration-cloud-sdk</artifactId>
</dependency>

Framework Integration​

In general, the SAP Cloud SDK for Java integrates natively into the Spring Boot framework.

In particular the SAP Cloud SDK provides listeners that can extract tenant and principal information from an incoming request. To ensure these listeners are present, please configure your project accordingly.

For a Spring 5 based project please ensure that the application is annotated to scan for components of the SAP Cloud SDK:

@ComponentScan({"com.sap.cloud.sdk", <your.own.package>})
@ServletComponentScan({"com.sap.cloud.sdk", <your.own.package>})

Also, please check the Spring version declared in the SAP Cloud SDK BOM doesn't clash with your version of Spring.

Spring Support for Cloud Foundry

For Spring based projects we provide out-of-the-box support only on Cloud Foundry with the archetype scp-cf-spring.

SAP Cloud SDK Modules Bill-of-Material

By default, the SAP Cloud SDK archetypes reference the SAP Cloud SDK Bill-of-Material sdk-bom, which manages dependency versions for all SAP Cloud SDK modules and transitive dependencies. If you face dependency conflicts, you can instead try using the SAP Cloud SDK Modules Bill-of-Material sdk-modules-bom in the dependencyManagement section of your Maven POM file.

Next Steps​

Further Resources​