[tcp] Echo example

src/examples/java/reactor/netty/examples/tcp/echo/EchoClient.java

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+/*
+ * Copyright (c) 2011-Present Pivotal Software Inc, All Rights Reserved.
+ *
+ * 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
+ *
+ *       https://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 reactor.netty.examples.tcp.echo;
+
+import io.netty.handler.ssl.SslContextBuilder;
+import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import reactor.netty.ByteBufFlux;
+import reactor.netty.Connection;
+import reactor.netty.tcp.TcpClient;
+
+/**
+ * A TCP client that sends a package to the TCP server and
+ * later echoes the received content thus initiating ping/pong.
+ *
+ * @author Violeta Georgieva
+ */
+public final class EchoClient {
+
+	static final boolean SECURE = System.getProperty("secure") != null;
+	static final int PORT = Integer.parseInt(System.getProperty("port", SECURE ? "8443" : "8080"));
+	static final boolean WIRETAP = System.getProperty("wiretap") != null;
+
+	public static void main(String[] args) {
+		TcpClient client =
+				TcpClient.create()
+				         .port(PORT)
+				         .wiretap(WIRETAP);
+
+		if (SECURE) {
+			client = client.secure(
+					spec -> spec.sslContext(SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE)));
+		}
+
+		Connection connection =
+				client.handle((in, out) -> out.send(Flux.concat(ByteBufFlux.fromString(Mono.just("echo")),
+				                                                in.receive().retain())))
+				      .connectNow();
+
+		connection.onDispose()
+		          .block();
+	}
+}

src/examples/java/reactor/netty/examples/tcp/echo/EchoServer.java

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+/*
+ * Copyright (c) 2011-Present Pivotal Software Inc, All Rights Reserved.
+ *
+ * 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
+ *
+ *       https://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 reactor.netty.examples.tcp.echo;
+
+import io.netty.handler.ssl.SslContextBuilder;
+import io.netty.handler.ssl.util.SelfSignedCertificate;
+import reactor.netty.tcp.TcpServer;
+
+/**
+ * A TCP server that sends back the received content.
+ *
+ * @author Violeta Georgieva
+ */
+public final class EchoServer {
+
+	static final boolean SECURE = System.getProperty("secure") != null;
+	static final int PORT = Integer.parseInt(System.getProperty("port", SECURE ? "8443" : "8080"));
+	static final boolean WIRETAP = System.getProperty("wiretap") != null;
+
+	public static void main(String[] args) throws Exception {
+		TcpServer server =
+				TcpServer.create()
+				         .port(PORT)
+				         .wiretap(WIRETAP)
+				         .handle((in, out) -> out.send(in.receive().retain()));
+
+		if (SECURE) {
+			SelfSignedCertificate ssc = new SelfSignedCertificate();
+			server = server.secure(
+					spec -> spec.sslContext(SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey())));
+		}
+
+		server.bindNow()
+		      .onDispose()
+		      .block();
+	}
+}