Reorganization of grpc code

spring-cloud-function-adapters/spring-cloud-function-grpc/src/test/java/org/springframework/cloud/function/grpc/GrpcInteractionTests.java

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+/*
+ * Copyright 2021-2021 the original author or authors.
+ *
+ * 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 org.springframework.cloud.function.grpc;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+import java.util.function.Function;
+
+import org.junit.jupiter.api.Test;
+import reactor.core.publisher.Flux;
+
+import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.messaging.Message;
+import org.springframework.messaging.MessageHeaders;
+import org.springframework.messaging.support.MessageBuilder;
+import org.springframework.util.MimeTypeUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.fail;
+
+/**
+ *
+ * @author Oleg Zhurakousky
+ *
+ */
+public class GrpcInteractionTests {
+
+	@Test
+	public void testRequestReply() {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				SampleConfiguration.class).web(WebApplicationType.NONE).run(
+						"--spring.jmx.enabled=false",
+						"--spring.cloud.function.definition=uppercase",
+						"--spring.cloud.function.grpc.port=" + FunctionGrpcProperties.GRPC_PORT)) {
+
+			Message<byte[]> message = MessageBuilder.withPayload("\"hello gRPC\"".getBytes())
+					.setHeader("foo", "bar")
+					.setHeader(MessageHeaders.CONTENT_TYPE, MimeTypeUtils.TEXT_PLAIN)
+					.build();
+
+			Message<byte[]> reply = GrpcUtils.requestReply(message);
+
+			assertThat(reply.getPayload()).isEqualTo("\"HELLO GRPC\"".getBytes());
+		}
+	}
+
+	@Test
+	public void testRequstReplyFunctionDefinitionInMessage() {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				SampleConfiguration.class).web(WebApplicationType.NONE).run(
+						"--spring.jmx.enabled=false",
+						"--spring.cloud.function.grpc.port=" + FunctionGrpcProperties.GRPC_PORT)) {
+
+			Message<byte[]> message = MessageBuilder.withPayload("\"hello gRPC\"".getBytes())
+					.setHeader("foo", "bar")
+					.setHeader("spring.cloud.function.definition", "reverse")
+					.build();
+
+			Message<byte[]> reply = GrpcUtils.requestReply(message);
+
+			assertThat(reply.getPayload()).isEqualTo("\"CPRg olleh\"".getBytes());
+		}
+	}
+
+	@Test
+	public void testBidirectionalStreamWithImperativeFunction() {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				SampleConfiguration.class).web(WebApplicationType.NONE).run(
+						"--spring.jmx.enabled=false",
+						"--spring.cloud.function.definition=uppercase",
+						"--spring.cloud.function.grpc.port="
+								+ FunctionGrpcProperties.GRPC_PORT)) {
+
+			List<Message<byte[]>> messages = new ArrayList<>();
+			messages.add(MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar")
+					.build());
+			messages.add(MessageBuilder.withPayload("\"Julien\"".getBytes()).setHeader("foo", "bar")
+					.build());
+			messages.add(MessageBuilder.withPayload("\"Bubbles\"".getBytes()).setHeader("foo", "bar")
+					.build());
+
+			Flux<Message<byte[]>> clientResponseObserver =
+					GrpcUtils.biStreaming("localhost", FunctionGrpcProperties.GRPC_PORT, Flux.fromIterable(messages));
+
+			List<Message<byte[]>> results = clientResponseObserver.collectList().block(Duration.ofSeconds(5));
+			assertThat(results.size()).isEqualTo(3);
+			assertThat(results.get(0).getPayload()).isEqualTo("\"RICKY\"".getBytes());
+			assertThat(results.get(1).getPayload()).isEqualTo("\"JULIEN\"".getBytes());
+			assertThat(results.get(2).getPayload()).isEqualTo("\"BUBBLES\"".getBytes());
+		}
+	}
+
+	@Test
+	public void testBidirectionalStreamWithReactiveFunction() {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				SampleConfiguration.class).web(WebApplicationType.NONE).run(
+						"--spring.jmx.enabled=false",
+						"--spring.cloud.function.definition=uppercaseReactive",
+						"--spring.cloud.function.grpc.port="
+								+ FunctionGrpcProperties.GRPC_PORT)) {
+
+			List<Message<byte[]>> messages = new ArrayList<>();
+			messages.add(MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar")
+					.setHeader(MessageHeaders.CONTENT_TYPE, MimeTypeUtils.TEXT_PLAIN)
+					.build());
+			messages.add(MessageBuilder.withPayload("\"Julien\"".getBytes()).setHeader("foo", "bar")
+					.setHeader(MessageHeaders.CONTENT_TYPE, MimeTypeUtils.TEXT_PLAIN)
+					.build());
+			messages.add(MessageBuilder.withPayload("\"Bubbles\"".getBytes()).setHeader("foo", "bar")
+					.setHeader(MessageHeaders.CONTENT_TYPE, MimeTypeUtils.TEXT_PLAIN)
+					.build());
+
+			Flux<Message<byte[]>> resultStream =
+					GrpcUtils.biStreaming("localhost", FunctionGrpcProperties.GRPC_PORT, Flux.fromIterable(messages));
+
+			List<Message<byte[]>> results = resultStream.collectList().block(Duration.ofSeconds(5));
+			assertThat(results.size()).isEqualTo(3);
+			assertThat(results.get(0).getPayload()).isEqualTo("\"RICKY\"".getBytes());
+			assertThat(results.get(1).getPayload()).isEqualTo("\"JULIEN\"".getBytes());
+			assertThat(results.get(2).getPayload()).isEqualTo("\"BUBBLES\"".getBytes());
+		}
+	}
+
+	@Test
+	public void testClientStreaming() {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				SampleConfiguration.class).web(WebApplicationType.NONE).run(
+						"--spring.jmx.enabled=false",
+						"--spring.cloud.function.definition=streamInStringOut",
+						"--spring.cloud.function.grpc.port="
+								+ FunctionGrpcProperties.GRPC_PORT)) {
+
+			List<Message<byte[]>> messages = new ArrayList<>();
+			messages.add(MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar")
+					.build());
+			messages.add(MessageBuilder.withPayload("\"Julien\"".getBytes()).setHeader("foo", "bar")
+					.build());
+			messages.add(MessageBuilder.withPayload("\"Bubbles\"".getBytes()).setHeader("foo", "bar")
+					.build());
+
+			Message<byte[]> reply =
+					GrpcUtils.clientStream("localhost", FunctionGrpcProperties.GRPC_PORT, Flux.fromIterable(messages));
+
+			assertThat(reply.getPayload()).isEqualTo("[Ricky, Julien, Bubbles]".getBytes());
+		}
+	}
+
+	@Test
+	public void testServerStreaming() {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				SampleConfiguration.class).web(WebApplicationType.NONE).run(
+						"--spring.jmx.enabled=false",
+						"--spring.cloud.function.definition=stringInStreamOut",
+						"--spring.cloud.function.grpc.port="
+								+ FunctionGrpcProperties.GRPC_PORT)) {
+
+			Message<byte[]> message = MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar").build();
+
+			Flux<Message<byte[]>> reply =
+					GrpcUtils.serverStream("localhost", FunctionGrpcProperties.GRPC_PORT, message);
+
+			List<Message<byte[]>> results = reply.collectList().block(Duration.ofSeconds(5));
+			assertThat(results.size()).isEqualTo(2);
+			assertThat(results.get(0).getPayload()).isEqualTo("\"Ricky\"".getBytes());
+			assertThat(results.get(1).getPayload()).isEqualTo("\"RICKY\"".getBytes());
+		}
+	}
+
+	@Test
+	public void testBiStreamStreamInStringOutFailure() {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				SampleConfiguration.class).web(WebApplicationType.NONE).run(
+						"--spring.jmx.enabled=false",
+						"--spring.cloud.function.definition=streamInStringOut",
+						"--spring.cloud.function.grpc.port="
+								+ FunctionGrpcProperties.GRPC_PORT)) {
+
+			List<Message<byte[]>> messages = new ArrayList<>();
+			messages.add(MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar")
+					.build());
+			messages.add(MessageBuilder.withPayload("\"Julien\"".getBytes()).setHeader("foo", "bar")
+					.build());
+			messages.add(MessageBuilder.withPayload("\"Bubbles\"".getBytes()).setHeader("foo", "bar")
+					.build());
+
+			Flux<Message<byte[]>> clientResponseObserver =
+					GrpcUtils.biStreaming("localhost", FunctionGrpcProperties.GRPC_PORT, Flux.fromIterable(messages));
+
+			try {
+				clientResponseObserver.collectList().block(Duration.ofSeconds(1));
+				fail();
+			}
+			catch (Exception e) {
+				// TODO: handle exception
+			}
+		}
+	}
+
+	@Test
+	public void testBiStreamStringInStreamOutFailure() {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				SampleConfiguration.class).web(WebApplicationType.NONE).run(
+						"--spring.jmx.enabled=false",
+						"--spring.cloud.function.definition=stringInStreamOut",
+						"--spring.cloud.function.grpc.port="
+								+ FunctionGrpcProperties.GRPC_PORT)) {
+
+			List<Message<byte[]>> messages = new ArrayList<>();
+			messages.add(MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar")
+					.build());
+			messages.add(MessageBuilder.withPayload("\"Julien\"".getBytes()).setHeader("foo", "bar")
+					.build());
+			messages.add(MessageBuilder.withPayload("\"Bubbles\"".getBytes()).setHeader("foo", "bar")
+					.build());
+
+			Flux<Message<byte[]>> clientResponseObserver =
+					GrpcUtils.biStreaming("localhost", FunctionGrpcProperties.GRPC_PORT, Flux.fromIterable(messages));
+
+			try {
+				clientResponseObserver.collectList().block(Duration.ofSeconds(1));
+				fail();
+			}
+			catch (Exception e) {
+				// TODO: handle exception
+			}
+		}
+	}
+
+	@EnableAutoConfiguration
+	public static class SampleConfiguration {
+
+		@Bean
+		public Function<String, String> uppercase() {
+			return v -> v.toUpperCase();
+		}
+
+		@Bean
+		public Function<String, String> reverse() {
+			return v -> new StringBuilder(v).reverse().toString();
+		}
+
+		@Bean
+		public Function<Flux<String>, Flux<String>> uppercaseReactive() {
+			return flux -> flux.map(v -> v.toUpperCase());
+		}
+
+		@Bean
+		public Function<Flux<String>, String> streamInStringOut() {
+			return flux -> flux.doOnNext(v -> {
+				try {
+					Thread.sleep(new Random().nextInt(2000)); // artificial delay
+				}
+				catch (Exception e) {
+					// ignore
+				}
+			}).collectList().block().toString();
+		}
+
+		@Bean
+		public Function<String, Flux<String>> stringInStreamOut() {
+			return value -> Flux.just(value, value.toUpperCase());
+		}
+	}
+}

spring-cloud-function-adapters/spring-cloud-function-grpc/src/test/resources/application.properties

@@ -0,0 +1 @@
+logging.level.org.springframework.cloud.function.grpc=DEBUG