Unofficial Java SDK for Wasm Workers Server works with teavm-wasi
<dependency>
<groupId>am.ik.wws</groupId>
<artifactId>wws-java</artifactId>
<version>0.1.2</version>
</dependency>
⚠️ optimizationLevelof the teavm-maven-plugin must beSIMPLE
Equivalent to https://workers.wasmlabs.dev/docs/languages/rust#your-first-rust-worker
import am.ik.wws.Response;
import am.ik.wws.Worker;
public class Main {
public static void main(String[] args) {
Worker.serve(req -> Response.status(200)
.header("X-Generated-By", "wasm-workers-server")
.data("Hello wasm!")
.build());
}
}See here for the full source code
https://workers.wasmlabs.dev/docs/features/key-value
Equivalent to https://workers.wasmlabs.dev/docs/languages/rust#add-a-key--value-store
import am.ik.wws.Response;
import am.ik.wws.Worker;
public class Main {
public static void main(String[] args) {
Worker.serve((req, cache) -> {
int counter = cache.get("counter").map(Integer::parseInt).orElse(0);
cache.put("counter", String.valueOf(++counter));
return Response.status(200)
.header("X-Generated-By", "wasm-workers-server")
.data("Counter: " + counter)
.build();
});
}
}See here for the full source code
https://workers.wasmlabs.dev/docs/features/dynamic-routes
Equivalent to https://workers.wasmlabs.dev/docs/languages/rust#dynamic-routes
import am.ik.wws.Response;
import am.ik.wws.Worker;
public class Main {
public static void main(String[] args) {
Worker.serve(req -> {
String id = req.routeParam("id").orElse(null);
return Response.status(200)
.header("X-Generated-By", "wasm-workers-server")
.data("Hey! The parameter is: " + id)
.build();
});
}
}See here for the full source code
prerequisites
- Java 8+
- Maven
wws
git clone https://github.com/making/wws-java
./wws-java/samples/hello-wasm/run.sh
./wws-java/samples/key-value/run.sh
./wws-java/samples/dynamic-routing/run.sh
mkdir -p worker/app/hello
cp wws-java/samples/hello-wasm/target/generated/wasm/teavm-wasm/hello.wasm worker/app/index.wasm
cp wws-java/samples/key-value/target/generated/wasm/teavm-wasm/key-value.wasm worker/app
cp wws-java/samples/dynamic-routing/target/generated/wasm/teavm-wasm/\[id\].wasm worker/app/hello
cat <<EOF > worker/app/key-value.toml
name = "key-value"
version = "1"
[data]
[data.kv]
namespace = "key-value"
EOF
cd worker
wws app
⚙️ Loading routes from: app
⏳ Loading workers from 3 routes...
✅ Workers loaded in 143.659922ms.
- http://127.0.0.1:8080/
=> app/index.wasm
- http://127.0.0.1:8080/key-value
=> app/key-value.wasm
- http://127.0.0.1:8080/hello/[id]
=> app/hello/[id].wasm
🚀 Start serving requests at http://127.0.0.1:8080
$ curl http://127.0.0.1:8080
Hello wasm!
$ curl http://127.0.0.1:8080/key-value
Counter: 1
$ curl http://127.0.0.1:8080/key-value
Counter: 2
$ curl http://127.0.0.1:8080/hello/100
Hey! The parameter is: 100
$ curl http://127.0.0.1:8080/hello/200
Hey! The parameter is: 200
Continuation of above work
cat <<EOF > Dockerfile
FROM ghcr.io/vmware-labs/wws:latest
COPY app/ /app/
EOF
cat <<EOF > fly.toml
[build]
dockerfile = "Dockerfile"
[[services]]
internal_port = 8080
protocol = "tcp"
[[services.ports]]
handlers = ["http"]
port = 80
[[services.ports]]
handlers = ["tls", "http"]
port = 443
EOF
APP=wws-${RANDOM}
flyctl apps create --name ${APP} --machines
flyctl deploy -a ${APP}
==> Verifying app config
--> Verified app config
==> Building image
Remote builder fly-builder-patient-smoke-2723 ready
==> Creating build context
--> Creating build context done
==> Building image with Docker
--> docker host: 20.10.12 linux x86_64
[+] Building 0.0s (0/1)
[+] Building 1.6s (6/6) FINISHED
=> [internal] load remote build context 0.0s
=> copy /context / 0.1s
=> [internal] load metadata for ghcr.io/vmware-labs/wws:latest 1.4s
=> CACHED [1/2] FROM ghcr.io/vmware-labs/wws:latest@sha256:7a6032f444be44a3245816ddb8985e0e16690515fb3716c81089da4341f82633 0.0s
=> [2/2] COPY app/ /app/ 0.0s
=> exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:984eeba44c03a271478f632ae354a085cec3acc98ddf53a689250911987cb4e4 0.0s
=> => naming to registry.fly.io/wws:deployment-01H25J2NCP4NM8NH9X7MK3WM7K 0.0s
--> Building image done
==> Pushing image to fly
The push refers to repository [registry.fly.io/wws]
29f44ef747c7: Pushed
3a9a2049a37e: Layer already exists
6664d441c951: Layer already exists
deployment-01H25J2NCP4NM8NH9X7MK3WM7K: digest: sha256:35fadd4a1fb15b72f503d29e255aaf991b7ecd2eb7ccf353edac33c62ec478f4 size: 949
--> Pushing image done
image: registry.fly.io/wws:deployment-01H25J2NCP4NM8NH9X7MK3WM7K
image size: 35 MB
Deploying wws app with rolling strategy
Machine 6e82d4d4a07198 [app] update finished: success
Finished deploying
$ curl https://${APP}.fly.dev
Hello wasm!
$ curl https://${APP}.fly.dev/key-value
Counter: 1
$ curl https://${APP}.fly.dev/key-value
Counter: 2
$ curl https://${APP}.fly.dev/hello/100
Hey! The parameter is: 100
$ curl https://${APP}.fly.dev/hello/200
Hey! The parameter is: 200
Licensed under the Apache License, Version 2.0.