zerodds-java-omgdds 1.0.0-rc.3

Native Java DDS-PSM scaffolding (org.omg.dds.* package)
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  • Source code size: 168.78 kB This is the summed size of all the files inside the crates.io package for this release.
  • Documentation size: 242.64 kB This is the summed size of all files generated by rustdoc for all configured targets
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  • this release: 2s Average build duration of successful builds.
  • all releases: 5s Average build duration of successful builds in releases after 2024-10-23.
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zerodds-java-omgdds

Native Java DDS PSM (org.omg.dds.*) — implements the OMG DDS Java PSM 1.0, the spec-defined Java API form. Part of ZeroDDS. Safety class STANDARD.

OMG DDS Java PSM 1.0 spec audit (K15) completed 2026-04-28: 156 done / 0 partial / 0 open / 15 n/a. Fully spec-conform.

Relationship to the JNI bridge

Two orthogonal Java paths:

  • zerodds-java-jni — JNI bridge over the Rust runtime. Uses zerodds-dcps directly, an idiomatic Java wrapper without strict spec fidelity.
  • zerodds-java-omgdds — this crate. Native Java classes that follow the org.omg.dds.* PSM exactly. Drop-in for applications that run today on the RTI Connext, OpenSplice or Cyclone DDS Java API.

Both paths use the same wire stack under the hood (crates/rtps via JNI). The difference is only in the Java API form.

Build

# Maven build (standard Java):
mvn -f crates/java-omgdds/pom.xml package

# The JAR lands in:
ls crates/java-omgdds/target/zerodds-java-omgdds-0.0.0.jar

Quickstart (OMG PSM form)

import org.omg.dds.core.*;
import org.omg.dds.domain.*;
import org.omg.dds.pub.*;
import org.omg.dds.topic.*;

DomainParticipantFactory factory = DomainParticipantFactory.getInstance();
DomainParticipant dp = factory.createParticipant(0);

Topic<Pose> topic = dp.createTopic("Telemetry", Pose.class);
Publisher pub = dp.createPublisher();
DataWriter<Pose> writer = pub.createDataWriter(topic);

writer.write(new Pose("r1", 1.0, 2.0, 3.0));

Pose is generated via zerodds-idlc Robot.idl --java.

Structure

crates/java-omgdds/
├── Cargo.toml          workspace member, build glue to the JNI layer
├── src/lib.rs          architecture doc + JNI hooks
├── src/main/java/      Java sources (Maven layout)
│   └── org/omg/dds/
│       ├── core/        Time, Duration, Status, Exception, Listener
│       ├── core/policy/ all 21 QoS policies, immutable builder
│       ├── domain/      DomainParticipantFactory, DomainParticipant
│       ├── topic/       Topic, ContentFilteredTopic, MultiTopic
│       ├── pub/         Publisher, DataWriter, PublisherListener
│       ├── sub/         Subscriber, DataReader, Sample, SampleSelector
│       ├── type/        TypeSupport, dynamic, builtin
│       └── rtps/        conversion helpers (delegate to the Rust stack)
└── pom.xml             Maven build

Documentation Trail

For the user guide see Documentation Trail Station 05 → Java.

Spec references

  • OMG DDS Java PSM 1.0
  • OMG DDS 1.4 §2.2 — DCPS
  • docs/spec-coverage/zerodds-java-psm-1.0.md — per-section audit
  • docs/architecture/05_java_jni_bridge.md — internal bridge architecture