adding feign clients and initial service structure

Author: pedrolopes9-7

spring-cloud-modules/spring-cloud-openfeign-2/src/main/java/com/baeldung/cloud/openfeign/completablefuturefeignclient/PaymentMethodClient.java

@@ -0,0 +1,15 @@
+package com.baeldung.cloud.openfeign.completablefuturefeignclient;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
+
+import java.util.List;
+
+@FeignClient(name = "paymentClient", url = "http://payments-api.com")
+public interface PaymentMethodClient {
+
+    @RequestMapping(method = RequestMethod.GET, value = "/payments/methods")
+    List<String> getAvailablePaymentMethods(@RequestParam(name = "site_id") String siteId);
+}

spring-cloud-modules/spring-cloud-openfeign-2/src/main/java/com/baeldung/cloud/openfeign/completablefuturefeignclient/Purchase.java

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+package com.baeldung.cloud.openfeign.completablefuturefeignclient;
+
+public class Purchase {
+
+    private String siteId;
+    private long orderId;
+
+    public Purchase(String siteId, long orderId) {
+        this.siteId = siteId;
+        this.orderId = orderId;
+    }
+
+    public String getSiteId() {
+        return siteId;
+    }
+
+    public void setSiteId(String siteId) {
+        this.siteId = siteId;
+    }
+
+    public long getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(long orderId) {
+        this.orderId = orderId;
+    }
+}

spring-cloud-modules/spring-cloud-openfeign-2/src/main/java/com/baeldung/cloud/openfeign/completablefuturefeignclient/PurchaseService.java

@@ -0,0 +1,28 @@
+package com.baeldung.cloud.openfeign.completablefuturefeignclient;
+
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+@Service
+public class PurchaseService {
+
+    private final PaymentMethodClient paymentMethodClient;
+    private final ReportClient reportClient;
+
+    public PurchaseService(PaymentMethodClient paymentMethodClient, ReportClient reportClient) {
+        this.paymentMethodClient = paymentMethodClient;
+        this.reportClient = reportClient;
+    }
+
+    public void executePurchase(Purchase purchase) {
+
+        ReportRequest report = new ReportRequest("Creating purchase for order", purchase.getOrderId(), purchase.getSiteId());
+
+        CompletableFuture.allOf(
+                CompletableFuture.supplyAsync(() -> paymentMethodClient.getAvailablePaymentMethods(purchase.getSiteId())),
+                CompletableFuture.runAsync(() -> reportClient.sendReport(report))
+        );
+    }
+}

spring-cloud-modules/spring-cloud-openfeign-2/src/main/java/com/baeldung/cloud/openfeign/completablefuturefeignclient/ReportClient.java

@@ -0,0 +1,13 @@
+package com.baeldung.cloud.openfeign.completablefuturefeignclient;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+@FeignClient(name = "reportClient", url = "http://reports-api.com")
+public interface ReportClient {
+
+    @RequestMapping(method = RequestMethod.POST, value = "/reports")
+    void sendReport(@RequestBody ReportRequest reportRequest);
+}

spring-cloud-modules/spring-cloud-openfeign-2/src/main/java/com/baeldung/cloud/openfeign/completablefuturefeignclient/ReportRequest.java

@@ -0,0 +1,34 @@
+package com.baeldung.cloud.openfeign.completablefuturefeignclient;
+
+public class ReportRequest {
+
+    private String content;
+    private long orderId;
+    private String siteId;
+
+    public ReportRequest(String content, long orderId, String siteId) {
+        this.content = content;
+        this.orderId = orderId;
+        this.siteId = siteId;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public long getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(long orderId) {
+        this.orderId = orderId;
+    }
+
+    public String getSiteId() {
+        return siteId;
+    }
+}