BAEL-878 [2] (#2194)

* code snippets for the `Java 9 Stream API improvements` article * code snippets for the `Java 9 Stream API improvements` article [2 attempt] * removed the first attempt * the Spring 5 WebClient * delted stream features test * HttpMediaTypeNotAcceptableExceptionExampleController [0] * reactive web client service was removed * new WebClient * new WebClient [2]
2017-07-03 09:35:38 +03:00
parent ad5696a8b5
commit 806c17b41b
3 changed files with 149 additions and 0 deletions
@@ -0,0 +1,86 @@
+package com.baeldung.web.reactive.client;
+
+import org.reactivestreams.Publisher;
+import org.reactivestreams.Subscriber;
+import org.springframework.http.*;
+import org.springframework.http.client.reactive.ClientHttpRequest;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.reactive.function.BodyInserter;
+import org.springframework.web.reactive.function.BodyInserters;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+import java.net.URI;
+import java.nio.charset.Charset;
+import java.time.ZonedDateTime;
+import java.util.Collections;
+
+@RestController
+public class WebClientController {
+
+    @ResponseStatus(HttpStatus.OK)
+    @GetMapping("/resource")
+    public void getResource() {
+    }
+
+    public void demonstrateWebClient() {
+        // request
+        WebClient.UriSpec<WebClient.RequestBodySpec> request1 = createWebClientWithServerURLAndDefaultValues().method(HttpMethod.POST);
+        WebClient.UriSpec<WebClient.RequestBodySpec> request2 = createWebClientWithServerURLAndDefaultValues().post();
+
+        // request body specifications
+        WebClient.RequestBodySpec uri1 = createWebClientWithServerURLAndDefaultValues().method(HttpMethod.POST).uri("/resource");
+        WebClient.RequestBodySpec uri2 = createWebClientWithServerURLAndDefaultValues().post().uri(URI.create("/resource"));
+
+        // request header specification
+        WebClient.RequestHeadersSpec<?> requestSpec1 = uri1.body(BodyInserters.fromPublisher(Mono.just("data"), String.class));
+        WebClient.RequestHeadersSpec<?> requestSpec2 = uri2.body(BodyInserters.fromObject("data"));
+
+        // inserters
+        BodyInserter<Publisher<String>, ReactiveHttpOutputMessage> inserter1 = BodyInserters
+                .fromPublisher(Subscriber::onComplete, String.class);
+
+
+        LinkedMultiValueMap<String, String> map = new LinkedMultiValueMap<>();
+        map.add("key1", "value1");
+        map.add("key2", "value2");
+
+        BodyInserter<MultiValueMap<String, ?>, ClientHttpRequest> inserter2 = BodyInserters.fromMultipartData(map);
+        BodyInserter<String, ReactiveHttpOutputMessage> inserter3 = BodyInserters.fromObject("body");
+
+        // responses
+        WebClient.ResponseSpec response1 = uri1
+                .body(inserter3)
+                .header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+                .accept(MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML)
+                .acceptCharset(Charset.forName("UTF-8"))
+                .ifNoneMatch("*")
+                .ifModifiedSince(ZonedDateTime.now())
+                .retrieve();
+        WebClient.ResponseSpec response2 = requestSpec2.retrieve();
+
+    }
+
+    private WebClient createWebClient() {
+        return WebClient.create();
+    }
+
+    private WebClient createWebClientWithServerURL() {
+        return WebClient.create("http://localhost:8081");
+    }
+
+    private WebClient createWebClientWithServerURLAndDefaultValues() {
+        return WebClient
+                .builder()
+                .baseUrl("http://localhost:8081")
+                .defaultCookie("cookieKey", "cookieValue")
+                .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+                .defaultUriVariables(Collections.singletonMap("url", "http://localhost:8080"))
+                .build();
+    }
+
+}