From 66b2bab0c2ab5ec400398dfd3912aeb728f88191 Mon Sep 17 00:00:00 2001
From: vthglyk <vasgl@intracom-telecom.com>
Date: Wed, 25 Jul 2018 10:07:39 +0300
Subject: [PATCH] Added SM Client

---
 .../client/AbstractSymbIoTeClientFactory.java |  8 +++
 .../symbiote/client/feign/FeignSMClient.java  | 65 +++++++++++++++++++
 .../feign/SymbIoTeFeignClientFactory.java     |  3 +
 .../symbiote/client/interfaces/SMClient.java  | 18 +++++
 4 files changed, 94 insertions(+)
 create mode 100644 src/main/java/eu/h2020/symbiote/client/feign/FeignSMClient.java
 create mode 100644 src/main/java/eu/h2020/symbiote/client/interfaces/SMClient.java

diff --git a/src/main/java/eu/h2020/symbiote/client/AbstractSymbIoTeClientFactory.java b/src/main/java/eu/h2020/symbiote/client/AbstractSymbIoTeClientFactory.java
index c8b26d5..53ddaf7 100644
--- a/src/main/java/eu/h2020/symbiote/client/AbstractSymbIoTeClientFactory.java
+++ b/src/main/java/eu/h2020/symbiote/client/AbstractSymbIoTeClientFactory.java
@@ -75,6 +75,14 @@ public static AbstractSymbIoTeClientFactory getFactory(Config config)
      */
     public abstract PRClient getPRClient(String platformId);
 
+    /**
+     * Get a Subscription Manager (SM) client for querying the SM of a specific platform
+     *
+     * @param platformId    the platform which we want to communicate with
+     * @return  a SM client
+     */
+    public abstract SMClient getSMClient(String platformId);
+
     /**
      * Get an Authentication and Authorization (AAM) client to communicate with an AAM of a specific platform
      *
diff --git a/src/main/java/eu/h2020/symbiote/client/feign/FeignSMClient.java b/src/main/java/eu/h2020/symbiote/client/feign/FeignSMClient.java
new file mode 100644
index 0000000..0eb4572
--- /dev/null
+++ b/src/main/java/eu/h2020/symbiote/client/feign/FeignSMClient.java
@@ -0,0 +1,65 @@
+package eu.h2020.symbiote.client.feign;
+
+import eu.h2020.symbiote.client.interfaces.SMClient;
+import eu.h2020.symbiote.cloud.model.internal.Subscription;
+import eu.h2020.symbiote.security.commons.exceptions.custom.SecurityHandlerException;
+import eu.h2020.symbiote.security.communication.ApacheCommonsLogger4Feign;
+import eu.h2020.symbiote.security.communication.payloads.AAM;
+import eu.h2020.symbiote.security.handler.ISecurityHandler;
+import feign.Feign;
+import feign.Headers;
+import feign.Logger;
+import feign.RequestLine;
+import feign.jackson.JacksonDecoder;
+import feign.jackson.JacksonEncoder;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import java.util.Map;
+
+/**
+ * symbIoTe Subscription Manager client based on Feign
+ *
+ * @author Vasilis Glykantzis
+ */
+public class FeignSMClient implements SMClient {
+
+    private static final Log logger = LogFactory.getLog(FeignSMClient.class);
+
+    private SubscriptionManagerI smClient;
+
+    /**
+     *
+     * @param securityHandler   the security handler implementation that is going to be used
+     * @param homePlatformId    the home Platform Id
+     */
+    public FeignSMClient(ISecurityHandler securityHandler,
+                         String homePlatformId) {
+
+        try {
+            Map<String, AAM> availableAAMs = securityHandler.getAvailableAAMs();
+            String smBaseUrl = availableAAMs.get(homePlatformId).getAamAddress().replace("/paam", "/subscriptionManager");
+
+            this.smClient = Feign.builder()
+                    .decoder(new JacksonDecoder())
+                    .encoder(new JacksonEncoder())
+                    .logger(new ApacheCommonsLogger4Feign(logger))
+                    .logLevel(Logger.Level.FULL)
+                    .client(new SymbIoTeSecurityHandlerFeignClient())
+                    .target(SubscriptionManagerI.class, smBaseUrl);
+        } catch (SecurityHandlerException e) {
+            logger.error("Could not create FeignSMClient", e);
+        }
+    }
+
+    @Override
+    public void subscribe(Subscription subscription) {
+        this.smClient.subscribe(subscription);
+    }
+
+    private interface SubscriptionManagerI {
+        @RequestLine("POST /subscribe ")
+        @Headers({"Accept: application/json", "Content-Type: application/json"})
+        void subscribe(Subscription subscription);
+    }
+}
diff --git a/src/main/java/eu/h2020/symbiote/client/feign/SymbIoTeFeignClientFactory.java b/src/main/java/eu/h2020/symbiote/client/feign/SymbIoTeFeignClientFactory.java
index e2e2102..0e6e458 100644
--- a/src/main/java/eu/h2020/symbiote/client/feign/SymbIoTeFeignClientFactory.java
+++ b/src/main/java/eu/h2020/symbiote/client/feign/SymbIoTeFeignClientFactory.java
@@ -95,6 +95,9 @@ public void checkServerTrusted(
     @Override
     public PRClient getPRClient(String platformId) { return new FeignPRClient(securityHandler, platformId); }
 
+    @Override
+    public SMClient getSMClient(String platformId) { return new FeignSMClient(securityHandler, platformId); }
+
     @Override
     public IAAMClient getAAMClient(String homePlatformId) {
         try {
diff --git a/src/main/java/eu/h2020/symbiote/client/interfaces/SMClient.java b/src/main/java/eu/h2020/symbiote/client/interfaces/SMClient.java
new file mode 100644
index 0000000..72143a7
--- /dev/null
+++ b/src/main/java/eu/h2020/symbiote/client/interfaces/SMClient.java
@@ -0,0 +1,18 @@
+package eu.h2020.symbiote.client.interfaces;
+
+import eu.h2020.symbiote.cloud.model.internal.Subscription;
+
+/**
+ * Interface for querying the platform Subscription Manager component
+ *
+ * @author Vasilis Glykantzis
+ */
+public interface SMClient {
+
+    /**
+     * Queries the Platform Registry component with home token
+     *
+     * @param subscription      the subscription request send to the Subscription Manager
+     */
+    void subscribe(Subscription subscription);
+}