Merge pull request #8125 from eugenp/revert-8119-BAEL-3275-2

Revert "BAEL-3275: Using blocking queue for pub-sub"

libraries-data-2/src/main/java/com/baeldung/derive4j/adt/Either.java

@@ -0,0 +1,10 @@
+package com.baeldung.derive4j.adt;
+
+import org.derive4j.Data;
+
+import java.util.function.Function;
+
+@Data
+interface Either<A,B>{
+    <X> X match(Function<A, X> left, Function<B, X> right);
+}

libraries-data-2/src/main/java/com/baeldung/derive4j/lazy/LazyRequest.java

@@ -0,0 +1,21 @@
+package com.baeldung.derive4j.lazy;
+
+import org.derive4j.Data;
+import org.derive4j.Derive;
+import org.derive4j.Make;
+
+@Data(value = @Derive(
+    inClass = "{ClassName}Impl",
+    make = {Make.lazyConstructor, Make.constructors, Make.getters}
+))
+public interface LazyRequest {
+    interface Cases<R>{
+        R GET(String path);
+        R POST(String path, String body);
+        R PUT(String path, String body);
+        R DELETE(String path);
+    }
+
+    <R> R match(Cases<R> method);
+}
+

libraries-data-2/src/main/java/com/baeldung/derive4j/pattern/HTTPRequest.java

@@ -0,0 +1,15 @@
+package com.baeldung.derive4j.pattern;
+
+import org.derive4j.Data;
+
+@Data
+interface HTTPRequest {
+    interface Cases<R>{
+        R GET(String path);
+        R POST(String path, String body);
+        R PUT(String path, String body);
+        R DELETE(String path);
+    }
+
+     <R> R match(Cases<R> method);
+}

libraries-data-2/src/main/java/com/baeldung/derive4j/pattern/HTTPResponse.java

@@ -0,0 +1,19 @@
+package com.baeldung.derive4j.pattern;
+
+public class HTTPResponse {
+    private int  statusCode;
+    private String responseBody;
+
+    public int getStatusCode() {
+        return statusCode;
+    }
+
+    public String getResponseBody() {
+        return responseBody;
+    }
+
+    public HTTPResponse(int statusCode, String responseBody) {
+        this.statusCode = statusCode;
+        this.responseBody = responseBody;
+    }
+}

libraries-data-2/src/main/java/com/baeldung/derive4j/pattern/HTTPServer.java

@@ -0,0 +1,17 @@
+package com.baeldung.derive4j.pattern;
+
+
+public class HTTPServer {
+    public static String GET_RESPONSE_BODY = "Success!";
+    public static String PUT_RESPONSE_BODY = "Resource Created!";
+    public static String POST_RESPONSE_BODY = "Resource Updated!";
+    public static String DELETE_RESPONSE_BODY = "Resource Deleted!";
+
+    public HTTPResponse acceptRequest(HTTPRequest request) {
+       return HTTPRequests.caseOf(request)
+                .GET((path) -> new HTTPResponse(200, GET_RESPONSE_BODY))
+                .POST((path,body) -> new HTTPResponse(201, POST_RESPONSE_BODY))
+                .PUT((path,body) -> new HTTPResponse(200, PUT_RESPONSE_BODY))
+                .DELETE(path -> new HTTPResponse(200, DELETE_RESPONSE_BODY));
+    }
+}