Make instance config factory support custom amazon info provider

eureka-client-archaius2/src/main/java/com/netflix/appinfo/Ec2EurekaArchaius2InstanceConfig.java

@@ -1,6 +1,7 @@
 package com.netflix.appinfo;
 
 import javax.inject.Inject;
+import javax.inject.Provider;
 import javax.inject.Singleton;
 
 import com.netflix.discovery.CommonConstants;
@@ -29,7 +30,7 @@ public class Ec2EurekaArchaius2InstanceConfig extends EurekaArchaius2InstanceCon
     };
 
     private final AmazonInfoConfig amazonInfoConfig;
-    private final RefreshableAmazonInfoProvider amazonInfoHolder;
+    private final Provider<AmazonInfo> amazonInfoHolder;
 
     @Inject
     public Ec2EurekaArchaius2InstanceConfig(Config configInstance, AmazonInfoConfig amazonInfoConfig) {
@@ -40,6 +41,12 @@ public Ec2EurekaArchaius2InstanceConfig(Config configInstance, AmazonInfoConfig
         this(configInstance, new Archaius2AmazonInfoConfig(configInstance), CommonConstants.DEFAULT_CONFIG_NAMESPACE, info, false);
     }
 
+    public Ec2EurekaArchaius2InstanceConfig(Config configInstance, Provider<AmazonInfo> amazonInfoProvider) {
+        super(configInstance, CommonConstants.DEFAULT_CONFIG_NAMESPACE);
+        this.amazonInfoConfig = null;
+        this.amazonInfoHolder = amazonInfoProvider;
+    }
+
     public Ec2EurekaArchaius2InstanceConfig(Config configInstance, AmazonInfoConfig amazonInfoConfig, String namespace) {
         this(configInstance, amazonInfoConfig, namespace, null, true);
     }
@@ -73,8 +80,8 @@ public String getFallbackHostname() {
 
     @Override
     public String getHostName(boolean refresh) {
-        if (refresh) {
-            amazonInfoHolder.refresh();
+        if (refresh && this.amazonInfoHolder instanceof RefreshableAmazonInfoProvider) {
+            ((RefreshableAmazonInfoProvider)amazonInfoHolder).refresh();
         }
         return amazonInfoHolder.get().get(MetaDataKey.publicHostname);
     }
@@ -98,7 +105,9 @@ public String[] getDefaultAddressResolutionOrder() {
      */
     @Deprecated
     public synchronized void refreshAmazonInfo() {
-        amazonInfoHolder.refresh();
+        if (this.amazonInfoHolder instanceof RefreshableAmazonInfoProvider) {
+            ((RefreshableAmazonInfoProvider)amazonInfoHolder).refresh();
+        }
     }
 
     @Override

eureka-client-archaius2/src/main/java/com/netflix/appinfo/providers/AmazonInfoProviderFactory.java

@@ -0,0 +1,9 @@
+package com.netflix.appinfo.providers;
+
+import com.netflix.appinfo.AmazonInfo;
+
+import javax.inject.Provider;
+
+public interface AmazonInfoProviderFactory {
+    Provider<AmazonInfo> get();
+}

eureka-client-archaius2/src/main/java/com/netflix/appinfo/providers/CustomAmazonInfoProviderInstanceConfigFactory.java

@@ -0,0 +1,33 @@
+package com.netflix.appinfo.providers;
+
+import com.netflix.appinfo.AmazonInfo;
+import com.netflix.appinfo.Ec2EurekaArchaius2InstanceConfig;
+import com.netflix.appinfo.EurekaInstanceConfig;
+import com.netflix.archaius.api.Config;
+
+import javax.inject.Inject;
+import javax.inject.Provider;
+import javax.inject.Singleton;
+
+@Singleton
+public class CustomAmazonInfoProviderInstanceConfigFactory implements EurekaInstanceConfigFactory {
+
+    private final Config configInstance;
+    private final Provider<AmazonInfo> amazonInfoProvider;
+    private EurekaInstanceConfig eurekaInstanceConfig;
+
+    @Inject
+    public CustomAmazonInfoProviderInstanceConfigFactory(Config configInstance, AmazonInfoProviderFactory amazonInfoProviderFactory) {
+        this.configInstance = configInstance;
+        this.amazonInfoProvider = amazonInfoProviderFactory.get();
+    }
+
+    @Override
+    public EurekaInstanceConfig get() {
+        if (eurekaInstanceConfig == null) {
+            eurekaInstanceConfig = new Ec2EurekaArchaius2InstanceConfig(configInstance, amazonInfoProvider);
+        }
+
+        return eurekaInstanceConfig;
+    }
+}