diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultConsistentMap.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultConsistentMap.java
index 569fc90..e09b624 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultConsistentMap.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultConsistentMap.java
@@ -189,6 +189,11 @@
         return javaMap;
     }
 
+    @Override
+    public String toString() {
+        return asJavaMap().toString();
+    }
+
     private static <T> T complete(CompletableFuture<T> future) {
         try {
             return future.get(OPERATION_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionContext.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionContext.java
index c8abc04..8cbe99f 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionContext.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionContext.java
@@ -29,6 +29,8 @@
 import org.onosproject.store.service.TransactionContext;
 import org.onosproject.store.service.TransactionalMap;
 
+import com.google.common.base.MoreObjects;
+import com.google.common.base.MoreObjects.ToStringHelper;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import com.google.common.util.concurrent.Futures;
@@ -114,4 +116,16 @@
             }
         }
     }
+
+    @Override
+    public String toString() {
+        ToStringHelper s = MoreObjects.toStringHelper(this)
+             .add("transactionId", transactionId)
+             .add("isOpen", isOpen);
+
+        txMaps.entrySet().forEach(e -> {
+            s.add(e.getKey(), e.getValue());
+        });
+        return s.toString();
+    }
 }
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionalMap.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionalMap.java
index 3594adb..dfeb4c1 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionalMap.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/DefaultTransactionalMap.java
@@ -30,6 +30,7 @@
 
 import static com.google.common.base.Preconditions.*;
 
+import com.google.common.base.MoreObjects;
 import com.google.common.base.Objects;
 import com.google.common.cache.CacheBuilder;
 import com.google.common.cache.CacheLoader;
@@ -193,6 +194,15 @@
         return updates;
     }
 
+    // TODO: build expected result Map processing DB updates?
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(this)
+                .add("backingMap", backingMap)
+                .add("updates", prepareDatabaseUpdates())
+                .toString();
+    }
+
     /**
      * Discards all changes made to this transactional map.
      */