feat(http): Add Request static accessors for exchange attributes

Author: thced

src/main/java/com/retailsvc/http/Request.java

@@ -0,0 +1,30 @@
+package com.retailsvc.http;
+
+import com.sun.net.httpserver.HttpExchange;
+import java.util.Map;
+
+public final class Request {
+  public static final String BODY = "body";
+  public static final String PARSED_BODY = "parsed-body";
+  public static final String OPERATION_ID = "operation-id";
+  public static final String PATH_PARAMETERS = "path-parameters";
+
+  private Request() {}
+
+  public static byte[] bytes(HttpExchange e) {
+    return (byte[]) e.getAttribute(BODY);
+  }
+
+  public static Object parsed(HttpExchange e) {
+    return e.getAttribute(PARSED_BODY);
+  }
+
+  public static String operationId(HttpExchange e) {
+    return (String) e.getAttribute(OPERATION_ID);
+  }
+
+  @SuppressWarnings("unchecked")
+  public static Map<String, String> pathParams(HttpExchange e) {
+    return (Map<String, String>) e.getAttribute(PATH_PARAMETERS);
+  }
+}

src/test/java/com/retailsvc/http/RequestTest.java

@@ -0,0 +1,24 @@
+package com.retailsvc.http;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import com.sun.net.httpserver.HttpExchange;
+import java.util.Map;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+class RequestTest {
+  @Test
+  void readsAttributes() {
+    HttpExchange ex = Mockito.mock(HttpExchange.class);
+    Mockito.when(ex.getAttribute("body")).thenReturn(new byte[] {1, 2, 3});
+    Mockito.when(ex.getAttribute("parsed-body")).thenReturn(Map.of("k", "v"));
+    Mockito.when(ex.getAttribute("operation-id")).thenReturn("get-x");
+    Mockito.when(ex.getAttribute("path-parameters")).thenReturn(Map.of("id", "42"));
+
+    assertThat(Request.bytes(ex)).containsExactly(1, 2, 3);
+    assertThat(Request.parsed(ex)).isEqualTo(Map.of("k", "v"));
+    assertThat(Request.operationId(ex)).isEqualTo("get-x");
+    assertThat(Request.pathParams(ex)).containsEntry("id", "42");
+  }
+}