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Added MultiCoapServer, helper class to support multiple Netty channels
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74 changes: 74 additions & 0 deletions
74
coap-netty/src/main/java/org/opencoap/coap/netty/MultiCoapServer.java
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| /* | ||
| * Copyright (C) 2022-2024 java-coap contributors (https://github.com/open-coap/java-coap) | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.opencoap.coap.netty; | ||
|
|
||
| import static com.mbed.coap.utils.Validations.require; | ||
| import static java.util.stream.Collectors.toList; | ||
| import static org.opencoap.coap.netty.CoapCodec.EMPTY_RESOLVER; | ||
| import com.mbed.coap.server.CoapServer; | ||
| import com.mbed.coap.server.CoapServerBuilder; | ||
| import io.netty.bootstrap.Bootstrap; | ||
| import io.netty.channel.EventLoopGroup; | ||
| import java.io.IOException; | ||
| import java.util.List; | ||
| import java.util.stream.StreamSupport; | ||
|
|
||
| public class MultiCoapServer { | ||
|
|
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| private final List<CoapServer> servers; | ||
|
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| private MultiCoapServer(List<CoapServer> servers) { | ||
| require(!servers.isEmpty(), "At least one server required"); | ||
| this.servers = servers; | ||
| } | ||
|
|
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| public static MultiCoapServer create(CoapServerBuilder builder, Bootstrap bootstrap) { | ||
| return create(builder, bootstrap, Integer.MAX_VALUE); | ||
| } | ||
|
|
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| public static MultiCoapServer create(CoapServerBuilder builder, Bootstrap bootstrap, int limitInstances) { | ||
| EventLoopGroup eventLoopGroup = bootstrap.config().group(); | ||
|
|
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| // create as many servers as there are executors in the event loop group | ||
| List<CoapServer> servers = StreamSupport.stream(eventLoopGroup.spliterator(), false) | ||
| .limit(limitInstances) | ||
| .map(executor -> builder | ||
| .transport(new NettyCoapTransport(bootstrap, EMPTY_RESOLVER)) | ||
| .executor(executor) | ||
| .build() | ||
| ) | ||
| .collect(toList()); | ||
|
|
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| return new MultiCoapServer(servers); | ||
| } | ||
|
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| public MultiCoapServer start() throws IOException { | ||
| for (CoapServer server : servers) { | ||
| server.start(); | ||
| } | ||
| return this; | ||
| } | ||
|
|
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| public void stop() { | ||
| for (CoapServer server : servers) { | ||
| server.stop(); | ||
| } | ||
| } | ||
|
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| public List<Integer> getLocalPorts() { | ||
| return servers.stream().map(server -> server.getLocalSocketAddress().getPort()).collect(toList()); | ||
| } | ||
| } |
105 changes: 105 additions & 0 deletions
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coap-netty/src/test/java/org/opencoap/coap/netty/MultiChannelNettyTest.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,105 @@ | ||
| /* | ||
| * Copyright (C) 2022-2024 java-coap contributors (https://github.com/open-coap/java-coap) | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.opencoap.coap.netty; | ||
|
|
||
| import static com.mbed.coap.packet.CoapRequest.get; | ||
| import static com.mbed.coap.packet.CoapResponse.ok; | ||
| import static com.mbed.coap.transport.udp.DatagramSocketTransport.udp; | ||
| import static com.mbed.coap.utils.Assertions.assertEquals; | ||
| import static com.mbed.coap.utils.Networks.localhost; | ||
| import static org.junit.jupiter.api.Assertions.assertTrue; | ||
| import com.mbed.coap.client.CoapClient; | ||
| import com.mbed.coap.server.CoapServer; | ||
| import com.mbed.coap.server.CoapServerBuilder; | ||
| import com.mbed.coap.server.RouterService; | ||
| import io.netty.bootstrap.Bootstrap; | ||
| import io.netty.channel.ChannelInitializer; | ||
| import io.netty.channel.EventLoopGroup; | ||
| import io.netty.channel.epoll.Epoll; | ||
| import io.netty.channel.epoll.EpollDatagramChannel; | ||
| import io.netty.channel.epoll.EpollEventLoopGroup; | ||
| import io.netty.channel.nio.NioEventLoopGroup; | ||
| import io.netty.channel.socket.DatagramChannel; | ||
| import io.netty.channel.socket.nio.NioDatagramChannel; | ||
| import io.netty.channel.unix.UnixChannelOption; | ||
| import io.netty.util.concurrent.DefaultThreadFactory; | ||
| import org.junit.jupiter.api.Test; | ||
| import org.junit.jupiter.api.TestInstance; | ||
|
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| @TestInstance(TestInstance.Lifecycle.PER_CLASS) | ||
| public class MultiChannelNettyTest { | ||
| private static final int THREADS = 3; | ||
| private final Bootstrap bootstrap = createBootstrap(); | ||
|
|
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| @Test | ||
| void test() throws Exception { | ||
| CoapServerBuilder builder = CoapServer.builder() | ||
| .route(RouterService.builder() | ||
| .get("/test", __ -> ok("OK").toFuture()) | ||
| ); | ||
| MultiCoapServer coapServer = MultiCoapServer.create(builder, bootstrap).start(); | ||
|
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| // verify that all channels are working | ||
| for (int i = 0; i < THREADS; i++) { | ||
| CoapClient client = CoapServer.builder() | ||
| .transport(udp()) | ||
| .buildClient(localhost(coapServer.getLocalPorts().get(i))); | ||
|
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| assertTrue(client.ping().get()); | ||
| assertEquals(ok("OK"), client.sendSync(get("/test"))); | ||
| } | ||
|
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| coapServer.stop(); | ||
| } | ||
|
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| private Bootstrap createBootstrap() { | ||
| if (Epoll.isAvailable()) { | ||
| return createEpollBootstrap(); | ||
| } | ||
|
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| return createNioBootstrap(); | ||
| } | ||
|
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| private Bootstrap createNioBootstrap() { | ||
| EventLoopGroup eventLoopGroup = new NioEventLoopGroup(THREADS, new DefaultThreadFactory("udp", true)); | ||
| return new Bootstrap() | ||
| .group(eventLoopGroup) | ||
| .localAddress(0) // this will cause server binding to multiple ports | ||
| .channel(NioDatagramChannel.class) | ||
| .handler(new ChannelInitializer<DatagramChannel>() { | ||
| @Override | ||
| protected void initChannel(DatagramChannel ch) { | ||
| // do nothing | ||
| } | ||
| }); | ||
| } | ||
|
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| private Bootstrap createEpollBootstrap() { | ||
| EventLoopGroup eventLoopGroup = new EpollEventLoopGroup(3, new DefaultThreadFactory("udp", true)); | ||
|
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| return new Bootstrap() | ||
| .group(eventLoopGroup) | ||
| .option(UnixChannelOption.SO_REUSEPORT, true) | ||
| .localAddress(65001) // bind multiple times on single port | ||
| .channel(EpollDatagramChannel.class) | ||
| .handler(new ChannelInitializer<DatagramChannel>() { | ||
| @Override | ||
| protected void initChannel(DatagramChannel ch) { | ||
| // do nothing | ||
| } | ||
| }); | ||
| } | ||
| } |