Event Functions¶

Event functions can be configured with event triggers and integrate a variety of OpenTelekomCloud products (such as object storage service OBS, distributed messaging service RabbitMQ version, cloud log service LTS, etc.).

FunctionGraph Java libraries¶

OpenTelekomCloud provides following libraries for FunctionGraph.

com.opentelekomcloud:opentelekomcloud-functiongraph-java-core (required)

Defines handler method interfaces and context object that the runtime passes to the handler.
com.opentelekomcloud:opentelekomcloud-functiongraph-java-events

Event sources from services that invoke FunctionGraph functions (e.g. APIG)
com.opentelekomcloud:opentelekomcloud-functiongraph-java-test

Defines a test classes, that can be used in JUnit tests.

OpenTelekomCloud community provides following libraries for Java development:

The community edition of OTC Java SDK v1 provides utility methods to handle request signing.

Installing libraries¶

These libraries are available through:

Install libraries to local .m2 repository

# Check out the repository with tag v1.0.0
git clone --branch v1.0.0 --single-branch "https://github.com/opentelekomcloud/opentelekomcloud-functiongraph-java.git"

# change to folder
cd opentelekomcloud-functiongraph-java

# run maven clean install
mvn clean install

Usage¶

These packages can be included as dependency to your Maven pom.xml as follows:

<dependencies>
  ...
  <dependency>
    <groupId>io.github.opentelekomcloud</groupId>
    <artifactId>opentelekomcloud-functiongraph-java-core</artifactId>
    <version>1.0.0</version>
  </dependency>

  <dependency>
    <groupId>io.github.opentelekomcloud</groupId>
    <artifactId>opentelekomcloud-functiongraph-java-events</artifactId>
    <version>1.0.0</version>
  </dependency>


  <dependency>
    <groupId>io.github.opentelekomcloud</groupId>
    <artifactId>opentelekomcloud-functiongraph-java-test</artifactId>
    <version>1.0.0</version>
    <scope>test</scope>
  </dependency>
  ...
<dependencies>

last updated: 2025-09-23 09:31:56 UTC - commit: 70dfd27683766d95e95edd34387e5c0f102dbc02