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Java SDK developer guide

Build Temporal Applications with the Java SDK.

Core application​

Use the essential components of a Temporal Application (Workflows, Activities, and Workers) to build and run a Temporal application.

Temporal Client​

Connect to a Temporal Service and start a Workflow Execution.

Testing​

Set up the testing suite and test Workflows and Activities.

Failure detection​

Explore how your application can detect failures using timeouts and automatically attempt to mitigate them with retries.

Workflow message passing​

Send messages to and read the state of Workflow Executions.

Asynchronous Activity completion​

Complete Activities asynchronously.

Versioning​

Change Workflow Definitions without causing non-deterministic behavior in current long-running Workflows.

Observability​

Configure and use the Temporal Observability APIs.

Debugging​

Explore various ways to debug your application.

Schedules​

Run Workflows on a schedule and delay the start of a Workflow.

Data encryption​

Use compression, encryption, and other data handling by implementing custom converters and codecs.

Temporal Nexus​

The Temporal Nexus feature guide shows how to use Temporal Nexus to connect Durable Executions within and across Namespaces using a Nexus Endpoint, a Nexus Service contract, and Nexus Operations.

Child Workflows​

Explore how to spawn a Child Workflow Execution and handle Child Workflow Events.

Continue-As-New​

Continue the Workflow Execution with a new Workflow Execution using the same Workflow ID.

Durable Timers​

Use Timers to make a Workflow Execution pause or "sleep" for seconds, minutes, days, months, or years.

Side Effects​

Use Side Effects in Workflows.

Manage Namespaces​

Create and manage Namespaces.