FMWK-459 Fix requiring id property from entities by AerospikeCache

src/main/java/org/springframework/data/aerospike/cache/AerospikeCache.java

@@ -21,6 +21,7 @@
 import com.aerospike.client.policy.RecordExistsAction;
 import com.aerospike.client.policy.WritePolicy;
 import org.springframework.cache.Cache;
+import org.springframework.cache.interceptor.SimpleKey;
 import org.springframework.cache.support.SimpleValueWrapper;
 import org.springframework.data.aerospike.convert.AerospikeConverter;
 import org.springframework.data.aerospike.convert.AerospikeReadData;
@@ -196,12 +197,18 @@ public ValueWrapper putIfAbsent(Object key, Object value) {
     }
 
     private Key getKey(Object key) {
-        return new Key(cacheConfiguration.getNamespace(), cacheConfiguration.getSet(), key.toString());
+        int userKey = (key instanceof SimpleKey && key.equals(SimpleKey.EMPTY))
+            // return hash code of key's class (hash code of key itself can be equal to 1) when no arguments are given
+            ? key.getClass().hashCode()
+            : key.hashCode();
+        return new Key(cacheConfiguration.getNamespace(), cacheConfiguration.getSet(), userKey);
     }
 
     private void serializeAndPut(WritePolicy writePolicy, Object key, Object value) {
-        AerospikeWriteData data = AerospikeWriteData.forWrite(getKey(key).namespace);
+        AerospikeWriteData data = AerospikeWriteData.forWrite(cacheConfiguration.getNamespace());
+        Key aerospikeKey = getKey(key);
+        data.setKey(aerospikeKey); // Set the key on the data object
         aerospikeConverter.write(value, data);
-        client.put(writePolicy, getKey(key), data.getBinsAsArray());
+        client.put(writePolicy, aerospikeKey, data.getBinsAsArray());
     }
 }

src/test/java/org/springframework/data/aerospike/BaseIntegrationTests.java

@@ -11,6 +11,9 @@ public abstract class BaseIntegrationTests {
 
     public static final String DEFAULT_SET_NAME = "aerospike";
     public static final String OVERRIDE_SET_NAME = "testSet1";
+    public static final String DIFFERENT_SET_NAME = "different-set";
+    public static final String CACHE_WITH_TTL = "CACHE-WITH-TTL";
+    public static final String DIFFERENT_EXISTING_CACHE = "DIFFERENT-EXISTING-CACHE";
     protected static final int MILLIS_TO_NANO = 1_000_000;
 
     @Value("${spring-data-aerospike.connection.namespace}")