From 7dfd081e0db8229791352293c6fbb57ed33fee3c Mon Sep 17 00:00:00 2001
From: Nadav Har'El <nyh@scylladb.com>
Date: Tue, 21 Jan 2020 11:25:38 +0200
Subject: [PATCH] alternator: make "executor" a peering_sharded_service

Alternator uses a sharded<executor> for handling execution of Alternator
requests on different shards. In this patch we make executor a subclass of
peering_sharded_service, to allow one of these executors to run an exector
method on a different shard: Any one of the shard-local executor instances
can call container() to get the full sharded<executor>.

We will need this capability later, when we need to bounce requests between
shards because of requirements of the storage_proxy::cas (LWT) code.

Signed-off-by: Nadav Har'El <nyh@scylladb.com>
---
 alternator/executor.hh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/alternator/executor.hh b/alternator/executor.hh
index 142d3f996d..a0f5778ce3 100644
--- a/alternator/executor.hh
+++ b/alternator/executor.hh
@@ -25,6 +25,7 @@
 #include <seastar/http/httpd.hh>
 #include "seastarx.hh"
 #include <seastar/json/json_elements.hh>
+#include <seastar/core/sharded.hh>
 
 #include "service/storage_proxy.hh"
 #include "service/migration_manager.hh"
@@ -34,7 +35,7 @@
 
 namespace alternator {
 
-class executor {
+class executor : public peering_sharded_service<executor> {
     service::storage_proxy& _proxy;
     service::migration_manager& _mm;