WIP Cloud Map Service Discovery

pom.xml

@@ -61,6 +61,7 @@
 		<module>spring-cloud-aws-actuator</module>
 		<module>spring-cloud-aws-parameter-store-config</module>
 		<module>spring-cloud-aws-secrets-manager-config</module>
+		<module>spring-cloud-aws-cloud-map-service-discovery</module>
 		<module>spring-cloud-starter-aws</module>
 		<module>spring-cloud-starter-aws-jdbc</module>
 		<module>spring-cloud-starter-aws-messaging</module>

spring-cloud-aws-cloud-map-service-discovery/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2013-2019 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.
+  -->
+
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xmlns="http://maven.apache.org/POM/4.0.0"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.cloud</groupId>
+		<artifactId>spring-cloud-aws</artifactId>
+		<version>3.0.0-SNAPSHOT</version>
+	</parent>
+
+	<artifactId>spring-cloud-aws-cloud-map-service-discovery</artifactId>
+	<name>Spring Cloud AWS Cloud Map Service Discovery</name>
+	<description>Spring Cloud AWS Cloud Map Service Discovery</description>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-core</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-commons</artifactId>
+			<version>${spring-cloud-commons.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>com.amazonaws</groupId>
+			<artifactId>aws-java-sdk-servicediscovery</artifactId>
+		</dependency>
+	</dependencies>
+</project>

spring-cloud-aws-cloud-map-service-discovery/src/main/java/org/springframework/cloud/aws/cloudmap/AwsCloudMapDiscoveryClient.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2013-2019 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.aws.cloudmap;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import com.amazonaws.services.servicediscovery.AWSServiceDiscovery;
+import com.amazonaws.services.servicediscovery.model.GetInstanceRequest;
+import com.amazonaws.services.servicediscovery.model.Instance;
+import com.amazonaws.services.servicediscovery.model.ListInstancesRequest;
+import com.amazonaws.services.servicediscovery.model.ListServicesRequest;
+import com.amazonaws.services.servicediscovery.model.ServiceSummary;
+
+import org.springframework.cloud.client.ServiceInstance;
+import org.springframework.cloud.client.discovery.DiscoveryClient;
+
+public class AwsCloudMapDiscoveryClient implements DiscoveryClient {
+
+	private final AWSServiceDiscovery aws;
+
+	public AwsCloudMapDiscoveryClient(AWSServiceDiscovery aws) {
+		this.aws = aws;
+	}
+
+	@Override
+	public String description() {
+		return "AWS Cloud Map Discovery Client";
+	}
+
+	@Override
+	public List<ServiceInstance> getInstances(String serviceId) {
+		ListInstancesRequest listInstancesRequest = new ListInstancesRequest()
+				.withServiceId(serviceId);
+		// TODO pagination
+		// TODO parallel requests?
+		// TODO filter on health?
+		return aws.listInstances(listInstancesRequest).getInstances().stream()
+				.map(summary -> getInstance(serviceId, summary.getId()))
+				.collect(Collectors.toList());
+
+	}
+
+	private AwsCloudMapServiceInstance getInstance(String service, String id) {
+		Instance instance = aws.getInstance(new GetInstanceRequest().withInstanceId(id))
+				.getInstance();
+		return new AwsCloudMapServiceInstance(service, instance);
+	}
+
+	@Override
+	public List<String> getServices() {
+		// TODO pagination
+		return aws.listServices(new ListServicesRequest()).getServices().stream()
+				.map(ServiceSummary::getId).collect(Collectors.toList());
+	}
+
+}

spring-cloud-aws-cloud-map-service-discovery/src/main/java/org/springframework/cloud/aws/cloudmap/AwsCloudMapServiceInstance.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2013-2019 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.aws.cloudmap;
+
+import java.net.URI;
+import java.util.Map;
+
+import com.amazonaws.services.servicediscovery.model.Instance;
+
+import org.springframework.cloud.client.ServiceInstance;
+
+public class AwsCloudMapServiceInstance implements ServiceInstance {
+
+	private static final String AWS_INSTANCE_IPV_4 = "AWS_INSTANCE_IPV4";
+
+	private static final String AWS_INSTANCE_PORT = "AWS_INSTANCE_PORT";
+
+	private final String serviceId;
+
+	private final Instance instance;
+
+	public AwsCloudMapServiceInstance(String serviceId, Instance instance) {
+		this.serviceId = serviceId;
+		this.instance = instance;
+	}
+
+	@Override
+	public String getServiceId() {
+		return serviceId;
+	}
+
+	@Override
+	public String getHost() {
+		// TODO alternate host attributes
+		return instance.getAttributes().get(AWS_INSTANCE_IPV_4);
+	}
+
+	@Override
+	public int getPort() {
+		// TODO are there other possible values?
+		String port = instance.getAttributes().get(AWS_INSTANCE_PORT);
+		// TODO error handling?
+		return Integer.parseInt(port);
+	}
+
+	@Override
+	public boolean isSecure() {
+		return getPort() == 443;
+	}
+
+	@Override
+	public URI getUri() {
+		String scheme = isSecure() ? "https" : "http";
+		return URI.create(String.format("%s:%s/%s", scheme, getHost(), getPort()));
+	}
+
+	@Override
+	public Map<String, String> getMetadata() {
+		return instance.getAttributes();
+	}
+
+}