dacort commented on code in PR #34225:
URL: https://github.com/apache/airflow/pull/34225#discussion_r1486955811


##########
airflow/providers/amazon/aws/links/emr.py:
##########
@@ -66,3 +82,111 @@ def get_log_uri(
         return None
     log_uri = S3Hook.parse_s3_url(cluster_info["LogUri"])
     return "/".join(log_uri)
+
+
+class EmrServerlessLogsLink(BaseAwsLink):
+    """Helper class for constructing Amazon EMR Serverless link to Spark 
stdout logs."""
+
+    name = "Spark Driver stdout"
+    key = "emr_serverless_logs"
+
+    def get_link(
+        self,
+        operator: BaseOperator,
+        *,
+        ti_key: TaskInstanceKey,
+    ) -> str:
+        """
+        Pre-signed URL to the Spark stdout log.
+
+        :param operator: airflow operator
+        :param ti_key: TaskInstance ID to return link for
+        :return: Pre-signed URL to Spark stdout log. Empty string if no Spark 
stdout log is available.
+        """
+        conf = XCom.get_value(key=self.key, ti_key=ti_key)
+        if not conf:
+            return ""
+        # If get_dashboard_for_job_run fails for whatever reason, fail after 1 
attempt
+        # so that the rest of the links load in a reasonable time frame.
+        hook = EmrServerlessHook(
+            aws_conn_id=conf.get("conn_id"), config={"retries": 
{"total_max_attempts": 1}}
+        )
+        resp = hook.conn.get_dashboard_for_job_run(
+            applicationId=conf.get("application_id"), 
jobRunId=conf.get("job_run_id")
+        )
+        o = urlparse(resp["url"])
+        return o._replace(path="/logs/SPARK_DRIVER/stdout.gz").geturl()

Review Comment:
   k, I think I'm currently relying on "One faulty link might cause that other 
wouldn't rendered" in the scenario that the web server is operating in a 
private network and doesn't have access to the AWS API. So if I move into 
`format_link`, I'll have to accommodate for that as well. 



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