P02: Maven multi-module skeleton — domain, application, adapter-persistence, adapter-web, bootstrap

shopforge-domain/src/main/java/dev/shopforge/domain/Shop.java

@@ -0,0 +1,8 @@
+package dev.shopforge.domain;
+
+/** Ek shop. Sirf Java — koi annotation, koi framework nahi. */
+public record Shop(TenantId id, String naam, String subdomain, boolean active) {
+
+    public Shop activate()   { return new Shop(id, naam, subdomain, true); }
+    public Shop deactivate() { return new Shop(id, naam, subdomain, false); }
+}

shopforge-domain/src/main/java/dev/shopforge/domain/ShopRepository.java

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+package dev.shopforge.domain;
+
+import java.util.Optional;
+
+/**
+ * PORT — domain batata hai ki use kya chahiye, na ki wo kahan se aayega.
+ * Iska implementation adapter-persistence me hai. Teer domain ki taraf aata hai, jaata nahi.
+ */
+public interface ShopRepository {
+    Optional<Shop> bySubdomain(String subdomain);
+    Shop save(Shop shop);
+}

shopforge-domain/src/main/java/dev/shopforge/domain/TenantId.java

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+package dev.shopforge.domain;
+
+/** Ek shop ki pehchaan. Value object — bani to badal nahi sakti. */
+public record TenantId(String value) {
+    public TenantId {
+        if (value == null || value.isBlank())
+            throw new IllegalArgumentException("TenantId khaali nahi ho sakta");
+    }
+}

shopforge-domain/src/test/java/dev/shopforge/domain/ShopTest.java

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+package dev.shopforge.domain;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+class ShopTest {
+
+    @Test
+    void khaali_tenantId_bante_hi_mana_hai() {
+        assertThrows(IllegalArgumentException.class, () -> new TenantId("  "));
+    }
+
+    @Test
+    void activate_naya_object_deta_hai_purana_nahi_badalta() {
+        Shop band = new Shop(new TenantId("t1"), "Chai Point", "chaipoint", false);
+        Shop chalu = band.activate();
+        assertFalse(band.active());
+        assertTrue(chalu.active());
+    }
+}