feat (Gen AI): Update Context-Cache sample to include expiration date info (#12631)

Update an existing code sample to shared details to using `expiration date` option


Co-authored-by: Sampath Kumar <[email protected]>

Author: Valeriy-Burlaka

generative_ai/context_caching/context_caching_test.py renamed to generative_ai/context_caching/test_context_caching.py

@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 import os
 
 from typing import Generator

generative_ai/context_caching/update_context_cache.py

@@ -19,7 +19,9 @@
 def update_context_cache(cache_id: str) -> str:
     # [START generativeaionvertexai_gemini_update_context_cache]
     import vertexai
-    import datetime
+    from datetime import datetime as dt
+    from datetime import timezone as tz
+    from datetime import timedelta
 
     from vertexai.preview import caching
 
@@ -31,8 +33,13 @@ def update_context_cache(cache_id: str) -> str:
 
     cached_content = caching.CachedContent(cached_content_name=cache_id)
 
-    # Update the expiration time by 1 hour
-    cached_content.update(ttl=datetime.timedelta(hours=1))
+    # Option1: Update the context cache using TTL (Time to live)
+    cached_content.update(ttl=timedelta(hours=3))
+    cached_content.refresh()
+
+    # Option2: Update the context cache using specific time
+    next_week_utc = dt.now(tz.utc) + timedelta(days=7)
+    cached_content.update(expire_time=next_week_utc)
     cached_content.refresh()
 
     print(cached_content.expire_time)