From:  <brian@gir.tangent.org>
Date: Sat, 5 Jan 2008 08:01:45 +0000 (-0800)
Subject: memcached_behavior() causes commands to be buffered until they are flushed to
X-Git-Tag: 0.13~14
X-Git-Url: https://git.m6w6.name/?a=commitdiff_plain;h=edeb3965773b750c0cf454e8b1494fd030ba0369;p=m6w6%2Flibmemcached

memcached_behavior() causes commands to be buffered until they are flushed to
the remote connection.
---

diff --git a/ChangeLog b/ChangeLog
index a8e87a7d..6260ba04 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -10,6 +10,9 @@
   * Added memcached_fetch_execute() method
   * Found a bug where memcached_fetch() was not null terminating the result
     value.
+  * memcached_behavior() now has the ability to set "buffering" so that
+    data is not automatically flushed.
+  * Behavior change, buffered commands now return MEMCACHED_BUFFERED
 
 0.12 Tue Dec 11 15:20:55 PST 2007
   * Updates for consistent hashing
diff --git a/docs/memcached_behavior.pod b/docs/memcached_behavior.pod
index e5058de3..b76ae054 100755
--- a/docs/memcached_behavior.pod
+++ b/docs/memcached_behavior.pod
@@ -73,6 +73,12 @@ Support CAS operations (this is not enabled by default at this point in the serv
 
 Modify the timeout value that is used by poll(). The default value is -1. An signed int pointer must be passed to memcached_behavior_set() to change this value. For memcached_behavior_get() a signed int value will be cast and returned as the unsigned long long.
 
+=item MEMCACHED_BUFFERED
+
+Enabling buffered IO causes commands to "buffer" instead of being sent. Any
+action that gets data causes this buffer to be be sent to the remote
+connection. Quiting the connection or closing down the connection will also
+cause the buffered data to be pushed to the remote connection. 
 
 =back
 
diff --git a/include/memcached.h b/include/memcached.h
index 1cbdcf68..fb836284 100644
--- a/include/memcached.h
+++ b/include/memcached.h
@@ -69,6 +69,7 @@ typedef enum {
   MEMCACHED_NO_KEY_PROVIDED,
   MEMCACHED_FETCH_NOTFINISHED,
   MEMCACHED_TIMEOUT,
+  MEMCACHED_BUFFERED,
   MEMCACHED_MAXIMUM_RETURN, /* Always add new error code before */
 } memcached_return;
 
@@ -88,6 +89,7 @@ typedef enum {
   MEMCACHED_BEHAVIOR_SUPPORT_CAS,
   MEMCACHED_BEHAVIOR_POLL_TIMEOUT,
   MEMCACHED_BEHAVIOR_DISTRIBUTION,
+  MEMCACHED_BEHAVIOR_BUFFER_REQUESTS,
 } memcached_behavior;
 
 typedef enum {
diff --git a/lib/common.h b/lib/common.h
index 395b80ef..35775ba8 100644
--- a/lib/common.h
+++ b/lib/common.h
@@ -60,6 +60,7 @@ typedef enum {
   MEM_USE_CRC= (1 << 5),
   MEM_USE_CACHE_LOOKUPS= (1 << 6),
   MEM_SUPPORT_CAS= (1 << 7),
+  MEM_BUFFER_REQUESTS= (1 << 8),
 } memcached_flags;
 
 /* Hashing algo */
diff --git a/lib/memcached_behavior.c b/lib/memcached_behavior.c
index 853a33b3..c54d93fc 100644
--- a/lib/memcached_behavior.c
+++ b/lib/memcached_behavior.c
@@ -31,6 +31,8 @@ memcached_return memcached_behavior_set(memcached_st *ptr,
     break;
   case MEMCACHED_BEHAVIOR_NO_BLOCK:
     set_behavior_flag(ptr, MEM_NO_BLOCK, data);
+  case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
+    set_behavior_flag(ptr, MEM_BUFFER_REQUESTS, data);
     break;
   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
     set_behavior_flag(ptr, MEM_TCP_NODELAY, data);
@@ -89,6 +91,9 @@ unsigned long long memcached_behavior_get(memcached_st *ptr,
   case MEMCACHED_BEHAVIOR_NO_BLOCK:
     temp_flag= MEM_NO_BLOCK;
     break;
+  case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
+    temp_flag= MEM_BUFFER_REQUESTS;
+    break;
   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
     temp_flag= MEM_TCP_NODELAY;
     break;
diff --git a/lib/memcached_delete.c b/lib/memcached_delete.c
index 4fe29421..a7298141 100644
--- a/lib/memcached_delete.c
+++ b/lib/memcached_delete.c
@@ -42,18 +42,15 @@ memcached_return memcached_delete_by_key(memcached_st *ptr,
     goto error;
   }
 
-  if ((ptr->flags & MEM_NO_BLOCK))
-    to_write= 0;
-  else
-    to_write= 1;
+  to_write= (ptr->flags & MEM_BUFFER_REQUESTS) ? 0 : 1;
 
   rc= memcached_do(ptr, server_key, buffer, send_length, to_write);
   if (rc != MEMCACHED_SUCCESS)
     goto error;
 
-  if ((ptr->flags & MEM_NO_BLOCK))
+  if ((ptr->flags & MEM_BUFFER_REQUESTS))
   {
-    rc= MEMCACHED_SUCCESS;
+    rc= MEMCACHED_BUFFERED;
   }
   else
   {
@@ -118,18 +115,5 @@ memcached_return memcached_mdelete_by_key(memcached_st *ptr,
     (void)memcached_do(ptr, server_key, buffer, send_length, 0);
   }
 
-  for (x= 0; x < ptr->number_of_hosts; x++)
-  {
-    if (memcached_server_response_count(ptr, x))
-    {
-      /* We need to do something about non-connnected hosts in the future */
-      if ((memcached_io_write(ptr, x, NULL, 0, 1)) == -1)
-      {
-        rc= MEMCACHED_SOME_ERRORS;
-      }
-    }
-  }
-
-  LIBMEMCACHED_MEMCACHED_DELETE_END();
-  return rc;
+  return MEMCACHED_BUFFERED;
 }
diff --git a/lib/memcached_storage.c b/lib/memcached_storage.c
index 43a96636..38d6d0db 100644
--- a/lib/memcached_storage.c
+++ b/lib/memcached_storage.c
@@ -96,7 +96,7 @@ static inline memcached_return memcached_send(memcached_st *ptr,
     goto error;
   }
 
-  if ((ptr->flags & MEM_NO_BLOCK) && verb == SET_OP)
+  if ((ptr->flags & MEM_BUFFER_REQUESTS) && verb == SET_OP)
     to_write= 0;
   else
     to_write= 1;
@@ -108,9 +108,9 @@ static inline memcached_return memcached_send(memcached_st *ptr,
   }
 
   if (to_write == 0)
-    rc= MEMCACHED_SUCCESS;
-  else
-    rc= memcached_response(ptr, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL, server_key);
+    return MEMCACHED_BUFFERED;
+
+  rc= memcached_response(ptr, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL, server_key);
 
   if (rc == MEMCACHED_STORED)
     return MEMCACHED_SUCCESS;
diff --git a/lib/memcached_strerror.c b/lib/memcached_strerror.c
index f04f2289..8b8438bb 100644
--- a/lib/memcached_strerror.c
+++ b/lib/memcached_strerror.c
@@ -64,6 +64,8 @@ char *memcached_strerror(memcached_st *ptr, memcached_return rc)
     return "FETCH WAS NOT COMPLETED";
   case MEMCACHED_NO_KEY_PROVIDED:
     return "A KEY LENGTH OF ZERO WAS PROVIDED";
+  case MEMCACHED_BUFFERED:
+    return "ACTION QUEUED";
   case MEMCACHED_TIMEOUT:
     return "A TIMEOUT OCCURRED";
   case MEMCACHED_MAXIMUM_RETURN:
diff --git a/tests/function.c b/tests/function.c
index 54bbceaa..46005ce7 100644
--- a/tests/function.c
+++ b/tests/function.c
@@ -1686,6 +1686,17 @@ uint8_t generate_data(memcached_st *memc)
   return 0;
 }
 
+uint8_t generate_buffer_data(memcached_st *memc)
+{
+  int latch= 0;
+
+  latch= 1;
+  memcached_behavior_set(memc, MEMCACHED_BEHAVIOR_BUFFER_REQUESTS, &latch);
+  generate_data(memc);
+
+  return 0;
+}
+
 #ifdef NOT_DONE
 uint8_t mset_data(memcached_st *memc)
 {
@@ -1809,6 +1820,22 @@ uint8_t delete_generate(memcached_st *memc)
   return 0;
 }
 
+uint8_t delete_buffer_generate(memcached_st *memc)
+{
+  int latch= 0;
+  unsigned int x;
+
+  latch= 1;
+  memcached_behavior_set(memc, MEMCACHED_BEHAVIOR_BUFFER_REQUESTS, &latch);
+
+  for (x= 0; x < GLOBAL_COUNT; x++)
+  {
+    (void)memcached_delete(memc, global_keys[x], global_keys_length[x], (time_t)0);
+  }
+
+  return 0;
+}
+
 uint8_t mdelete_generate(memcached_st *memc)
 {
   memcached_return rc;
@@ -2115,6 +2142,8 @@ test_st generate_tests[] ={
   {"generate_data", 0, generate_data },
   {"get_read", 0, get_read },
   {"delete_generate", 0, delete_generate },
+  {"generate_buffer_data", 0, generate_buffer_data },
+  {"delete_buffer", 0, delete_buffer_generate},
   {"generate_data", 0, generate_data },
   {"mget_read", 0, mget_read },
   {"mget_read_result", 0, mget_read_result },