Added example for watch returning null

valkey-io · Jun 13, 2024 · 61af157 · 61af157
1 parent 3a145be
commit 61af157
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/java/client/src/main/java/glide/api/commands/TransactionsBaseCommands.java b/java/client/src/main/java/glide/api/commands/TransactionsBaseCommands.java
@@ -24,6 +24,12 @@ public interface TransactionsBaseCommands {
      * transaction.set("sampleKey", "foobar");
      * Object[] result = client.exec(transaction).get();
      * assert result != null; // Executes successfully and keys are unwatched.
+     *
+     * assert client.watch(new String[] {"sampleKey"}).get() == "OK";
+     * transaction.set("sampleKey", "foobar");
+     * assert client.set("sampleKey", "hello world").get() == "OK";
+     * Object[] result = client.exec(transaction).get();
+     * assert result == null; // null is returned when the watched key is modified before transaction execution.
      * }</pre>
      */
     CompletableFuture<String> watch(String[] keys);