implement zesa currency swap feature

src/main/java/zw/qantra/tm/domain/services/ProviderService.java

@@ -5,6 +5,7 @@ import lombok.RequiredArgsConstructor;
 
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.cache.annotation.CacheEvict;
 import org.springframework.cache.annotation.Cacheable;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.domain.Specification;
@@ -81,7 +82,8 @@ public class ProviderService {
         return products;
     }
 
-    @Cacheable(value = "providerProducts", key = "#providerUid")
+    // todo: figure out caching for different providers
+    // @Cacheable(value = "providerProducts", key = "#providerUid")
     public List<SBZProductDto> getProviderProducts(String providerUid) {
         try {
             Provider provider = providerRepository.findById(UUID.fromString(providerUid)).orElse(null);
@@ -126,6 +128,7 @@ public class ProviderService {
 
             return products;
         } catch (IllegalArgumentException e) {
+            log.error("Error fetching products: " + providerUid, e);
             return Collections.emptyList();
         }
     }
@@ -159,11 +162,7 @@ public class ProviderService {
     }
 
     public Object getProviderByClientId(String clientId) {
-        Provider provider = providerRepository.findByClientId(clientId);
-        if (provider != null) {
-            return ((List)getProviders(Collections.singletonList(provider))).stream().findFirst().orElse(null);
-        }
-        return null;
+        return providerRepository.findByClientId(clientId);
     }
 
     public Object findAll(Specification<Provider> specification, Pageable pageable) {
@@ -237,4 +236,17 @@ public class ProviderService {
         }
         return false;
     }
+
+    // Evict ALL providerProducts cache entries
+    @CacheEvict(value = "providerProducts", allEntries = true)
+    public void evictProviderProductsCache() {
+        // empty - annotation handles the eviction
+    }
+
+    // Or evict a SINGLE entry by key
+    @CacheEvict(value = "providerProducts", key = "#providerUid")
+    public void evictProviderProductCache(String providerUid) {
+        // only evicts cache for this specific providerUid
+    }
+
 }