BAEL-3091: The Prototype Pattern in Java (changed code based on valid comments from a reader)

ratpack/src/main/java/com/baeldung/hystrix/HystrixReactiveHttpCommand.java

@@ -0,0 +1,44 @@
+package com.baeldung.hystrix;
+
+import com.netflix.hystrix.HystrixCommandGroupKey;
+import com.netflix.hystrix.HystrixCommandProperties;
+import com.netflix.hystrix.HystrixObservableCommand;
+import ratpack.http.client.HttpClient;
+import ratpack.rx.RxRatpack;
+import rx.Observable;
+
+import java.net.URI;
+
+/**
+ * @author aiet
+ */
+public class HystrixReactiveHttpCommand extends HystrixObservableCommand<String> {
+
+    private HttpClient httpClient;
+    private URI uri;
+
+    HystrixReactiveHttpCommand(HttpClient httpClient, URI uri, int timeoutMillis) {
+        super(Setter
+          .withGroupKey(HystrixCommandGroupKey.Factory.asKey("hystrix-ratpack-reactive"))
+          .andCommandPropertiesDefaults(HystrixCommandProperties
+            .Setter()
+            .withExecutionTimeoutInMilliseconds(timeoutMillis)));
+        this.httpClient = httpClient;
+        this.uri = uri;
+    }
+
+    @Override
+    protected Observable<String> construct() {
+        return RxRatpack.observe(httpClient
+          .get(uri, requestSpec -> requestSpec.headers(mutableHeaders -> mutableHeaders.add("User-Agent", "Baeldung HttpClient")))
+          .map(receivedResponse -> receivedResponse
+            .getBody()
+            .getText()));
+    }
+
+    @Override
+    protected Observable<String> resumeWithFallback() {
+        return Observable.just("eugenp's reactive fallback profile");
+    }
+
+}