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OlegDokukaOlegDokuka
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adds routing example with TaggingMetadata and CompositeMetadata (#1021)
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‎rsocket-examples/src/main/java/io/rsocket/examples/transport/tcp/metadata/routing/CompositeMetadataExample.java

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/*
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* Copyright 2015-Present the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package io.rsocket.examples.transport.tcp.metadata.routing;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufAllocator;
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import io.netty.buffer.ByteBufUtil;
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import io.netty.buffer.CompositeByteBuf;
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import io.rsocket.RSocket;
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import io.rsocket.SocketAcceptor;
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import io.rsocket.core.RSocketConnector;
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import io.rsocket.core.RSocketServer;
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import io.rsocket.metadata.CompositeMetadata;
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import io.rsocket.metadata.CompositeMetadataCodec;
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import io.rsocket.metadata.RoutingMetadata;
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import io.rsocket.metadata.TaggingMetadataCodec;
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import io.rsocket.metadata.WellKnownMimeType;
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import io.rsocket.transport.netty.client.TcpClientTransport;
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import io.rsocket.transport.netty.server.TcpServerTransport;
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import io.rsocket.util.ByteBufPayload;
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import java.util.Collections;
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import java.util.Objects;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import reactor.core.publisher.Mono;
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public class CompositeMetadataExample {
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static final Logger logger = LoggerFactory.getLogger(CompositeMetadataExample.class);
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public static void main(String[] args) {
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RSocketServer.create(
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SocketAcceptor.forRequestResponse(
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payload -> {
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final String route = decodeRoute(payload.sliceMetadata());
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logger.info("Received RequestResponse[route={}]", route);
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payload.release();
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if ("my.test.route".equals(route)) {
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return Mono.just(ByteBufPayload.create("Hello From My Test Route"));
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}
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return Mono.error(new IllegalArgumentException("Route " + route + " not found"));
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}))
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.bindNow(TcpServerTransport.create("localhost", 7000));
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RSocket socket =
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RSocketConnector.create()
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// here we specify that every metadata payload will be encoded using
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// CompositeMetadata layout as specified in the following subspec
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// https://github.com/rsocket/rsocket/blob/master/Extensions/CompositeMetadata.md
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.metadataMimeType(WellKnownMimeType.MESSAGE_RSOCKET_COMPOSITE_METADATA.getString())
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.connect(TcpClientTransport.create("localhost", 7000))
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.block();
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final ByteBuf routeMetadata =
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TaggingMetadataCodec.createTaggingContent(
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ByteBufAllocator.DEFAULT, Collections.singletonList("my.test.route"));
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final CompositeByteBuf compositeMetadata = ByteBufAllocator.DEFAULT.compositeBuffer();
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CompositeMetadataCodec.encodeAndAddMetadata(
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compositeMetadata,
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ByteBufAllocator.DEFAULT,
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WellKnownMimeType.MESSAGE_RSOCKET_ROUTING,
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routeMetadata);
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socket
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.requestResponse(
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ByteBufPayload.create(
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ByteBufUtil.writeUtf8(ByteBufAllocator.DEFAULT, "HelloWorld"), compositeMetadata))
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.log()
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.block();
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}
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static String decodeRoute(ByteBuf metadata) {
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final CompositeMetadata compositeMetadata = new CompositeMetadata(metadata, false);
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for (CompositeMetadata.Entry metadatum : compositeMetadata) {
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if (Objects.requireNonNull(metadatum.getMimeType())
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.equals(WellKnownMimeType.MESSAGE_RSOCKET_ROUTING.getString())) {
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return new RoutingMetadata(metadatum.getContent()).iterator().next();
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}
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}
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return null;
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}
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}

‎rsocket-examples/src/main/java/io/rsocket/examples/transport/tcp/metadata/routing/RoutingMetadataExample.java

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/*
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* Copyright 2015-Present the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package io.rsocket.examples.transport.tcp.metadata.routing;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufAllocator;
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import io.netty.buffer.ByteBufUtil;
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import io.rsocket.RSocket;
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import io.rsocket.SocketAcceptor;
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import io.rsocket.core.RSocketConnector;
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import io.rsocket.core.RSocketServer;
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import io.rsocket.metadata.RoutingMetadata;
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import io.rsocket.metadata.TaggingMetadataCodec;
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import io.rsocket.metadata.WellKnownMimeType;
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import io.rsocket.transport.netty.client.TcpClientTransport;
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import io.rsocket.transport.netty.server.TcpServerTransport;
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import io.rsocket.util.ByteBufPayload;
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import java.util.Collections;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import reactor.core.publisher.Mono;
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public class RoutingMetadataExample {
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static final Logger logger = LoggerFactory.getLogger(RoutingMetadataExample.class);
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public static void main(String[] args) {
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RSocketServer.create(
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SocketAcceptor.forRequestResponse(
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payload -> {
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final String route = decodeRoute(payload.sliceMetadata());
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logger.info("Received RequestResponse[route={}]", route);
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payload.release();
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if ("my.test.route".equals(route)) {
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return Mono.just(ByteBufPayload.create("Hello From My Test Route"));
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}
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return Mono.error(new IllegalArgumentException("Route " + route + " not found"));
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}))
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.bindNow(TcpServerTransport.create("localhost", 7000));
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RSocket socket =
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RSocketConnector.create()
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// here we specify that route will be encoded using
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// Routing&Tagging Metadata layout specified at this
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// subspec https://github.com/rsocket/rsocket/blob/master/Extensions/Routing.md
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.metadataMimeType(WellKnownMimeType.MESSAGE_RSOCKET_ROUTING.getString())
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.connect(TcpClientTransport.create("localhost", 7000))
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.block();
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final ByteBuf routeMetadata =
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TaggingMetadataCodec.createTaggingContent(
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ByteBufAllocator.DEFAULT, Collections.singletonList("my.test.route"));
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socket
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.requestResponse(
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ByteBufPayload.create(
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ByteBufUtil.writeUtf8(ByteBufAllocator.DEFAULT, "HelloWorld"), routeMetadata))
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.log()
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.block();
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}
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static String decodeRoute(ByteBuf metadata) {
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final RoutingMetadata routingMetadata = new RoutingMetadata(metadata);
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return routingMetadata.iterator().next();
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}
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}

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