From 0bf64399713699c1ed423530edbdbbb0f259edd0 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 27 May 2013 19:34:02 +0200
Subject: MINREPLICAS work in progress.

---
 src/multi.c | 29 +++++++++++++++++++++++++++++
 src/redis.c | 13 +++++++++++++
 2 files changed, 42 insertions(+)

diff --git a/src/multi.c b/src/multi.c
index 7000c4841..833ff7e0a 100644
--- a/src/multi.c
+++ b/src/multi.c
@@ -35,6 +35,8 @@
 void initClientMultiState(redisClient *c) {
     c->mstate.commands = NULL;
     c->mstate.count = 0;
+    c->mstate.minreplicas = 0;
+    c->mstate.minreplicas_timeout = 0;
 }
 
 /* Release all the resources associated with MULTI/EXEC state */
@@ -321,3 +323,30 @@ void unwatchCommand(redisClient *c) {
     c->flags &= (~REDIS_DIRTY_CAS);
     addReply(c,shared.ok);
 }
+
+/* ------------------------- MINREPLICAS implementation --------------------- */
+
+/* MINREPLICAS <count> <timeout> */
+void minreplicasCommand(redisClient *c) {
+    long timeout, minreplicas;
+
+    if (!(c->flags & REDIS_MULTI)) {
+        addReplyError(c,"MINREPLICAS without MULTI");
+        return;
+    }
+    if (getLongFromObjectOrReply(c,object,&minreplicas,
+        "number of replicas is not an integer or out of range") != REDIS_OK)
+        return REDIS_ERR;
+
+    if (getLongFromObjectOrReply(c,object,&timeout,
+        "timeout is not an integer or out of range") != REDIS_OK)
+        return REDIS_ERR;
+
+    /* Force sane values. */
+    if (timeout < 0) timeout = 0;
+    if (minreplicas < 0) minreplicas = 0;
+
+    c->mstate.minreplicas = minreplicas;
+    c->mstate.minreplicas_timeout = timeout;
+    addReply(c,shared.ok);
+}
diff --git a/src/redis.c b/src/redis.c
index d68837500..767411758 100644
--- a/src/redis.c
+++ b/src/redis.c
@@ -221,6 +221,7 @@ struct redisCommand redisCommandTable[] = {
     {"multi",multiCommand,1,"rs",0,NULL,0,0,0,0,0},
     {"exec",execCommand,1,"sM",0,NULL,0,0,0,0,0},
     {"discard",discardCommand,1,"rs",0,NULL,0,0,0,0,0},
+    {"minreplicas",minreplicasCommand,3,"rs",0,NULL,0,0,0,0,0},
     {"sync",syncCommand,1,"ars",0,NULL,0,0,0,0,0},
     {"psync",syncCommand,3,"ars",0,NULL,0,0,0,0,0},
     {"replconf",replconfCommand,-1,"ars",0,NULL,0,0,0,0,0},
@@ -1112,6 +1113,18 @@ void beforeSleep(struct aeEventLoop *eventLoop) {
         }
     }
 
+    /* Request ACK to slaves if we have pending MINREPLICAS transactions. */
+    if (server.repl_request_ack) {
+        repl_request_ack = 0;
+        robj *argv[2];
+
+        argv[0] = createStringObject("REPLCONF",8);
+        argv[1] = createStrinbObject("SENDACK",7);
+        replicationFeedSlaves(server.slaves, server.slaveseldb, argv, 2);
+        decrRefCount(ping_argv[0]);
+        decrRefCount(ping_argv[1]);
+    }
+
     /* Write the AOF buffer on disk */
     flushAppendOnlyFile(0);
 }
-- 
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