reactive streams test

reactive-test/pom.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.example</groupId>
+    <artifactId>reactive-test</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.reactivestreams</groupId>
+            <artifactId>reactive-streams</artifactId>
+            <version>1.0.3</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+</project>

reactive-test/src/main/java/Application.java

@@ -0,0 +1,8 @@
+public class Application {
+    public static void main(String[] args) {
+        MyPublisher publisher = new MyPublisher();
+        MySubscriber subscriber = new MySubscriber();
+
+        publisher.subscribe(subscriber);
+    }
+}

reactive-test/src/main/java/MyPublisher.java

@@ -0,0 +1,18 @@
+import org.reactivestreams.Publisher;
+import org.reactivestreams.Subscriber;
+
+import java.util.Arrays;
+
+public class MyPublisher implements Publisher<Integer> {
+
+    Iterable<Integer> its = Arrays.asList(1,2,3,4,5,6,7,8,9,10);
+
+    @Override
+    public void subscribe(Subscriber<? super Integer> subscriber) {
+        System.out.println("구독 신청");
+        System.out.println("구독 정보 생성");
+        MySubscription subscription = new MySubscription(subscriber, its);
+        System.out.println("구독 정보 생성완료");
+        subscriber.onSubscribe(subscription);
+    }
+}

reactive-test/src/main/java/MySubscriber.java

@@ -0,0 +1,37 @@
+import org.reactivestreams.Subscriber;
+import org.reactivestreams.Subscription;
+
+public class MySubscriber implements Subscriber<Integer> {
+
+    private Subscription s;
+    private final int SIZE = 5;
+    private int bufferSize = SIZE;
+
+    @Override
+    public void onSubscribe(Subscription subscription) {
+        System.out.println("구독 정보 받음");
+        this.s = subscription;
+        s.request(bufferSize); // 요청 개수
+    }
+
+    @Override
+    public void onNext(Integer integer) {
+        System.out.println("구독 데이터 전달 : " + integer);
+        bufferSize--;
+        if (bufferSize == 0) {
+            System.out.println("하루 지남");
+            bufferSize = SIZE;
+            s.request(bufferSize);
+        }
+    }
+
+    @Override
+    public void onError(Throwable throwable) {
+        System.out.println("구독 에러");
+    }
+
+    @Override
+    public void onComplete() {
+        System.out.println("구독 완료");
+    }
+}

reactive-test/src/main/java/MySubscription.java

@@ -0,0 +1,33 @@
+import org.reactivestreams.Subscriber;
+import org.reactivestreams.Subscription;
+
+import java.util.Iterator;
+
+public class MySubscription implements Subscription {
+
+    private Subscriber s;
+    private Iterator<Integer> it;
+
+    public MySubscription(Subscriber s, Iterable<Integer> it) {
+        this.s = s;
+        this.it = it.iterator();
+    }
+
+    @Override
+    public void request(long l) {
+        while(l > 0) {
+            if (it.hasNext()) {
+                s.onNext(it.next());
+            } else {
+                s.onComplete();
+                break;
+            }
+            l--;
+        }
+    }
+
+    @Override
+    public void cancel() {
+
+    }
+}

webflux/src/main/java/com/example/webflux/MyFilterConfig.java

@@ -16,7 +16,7 @@ public class MyFilterConfig {
     @Bean
     public FilterRegistrationBean<Filter> addFilter() {
         FilterRegistrationBean<Filter> bean = new FilterRegistrationBean<>(new MyFilter(eventNotify));
-        bean.addUrlPatterns("/*");
+        bean.addUrlPatterns("/sse");
         return bean;
     }
     @Bean