1 files changed, 94 insertions, 0 deletions
diff --git a/sql/wsrep_notify.cc b/sql/wsrep_notify.cc
new file mode 100644
index 00000000..1de93d0d
--- /dev/null
+++ b/sql/wsrep_notify.cc
@@ -0,0 +1,94 @@
+/* Copyright 2010 Codership Oy <http://www.codership.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+#include "mariadb.h"
+#include <mysqld.h>
+#include "wsrep_priv.h"
+#include "wsrep_utils.h"
+
+void wsrep_notify_status(enum wsrep::server_state::state status,
+                         const wsrep::view* view)
+{
+  if (!wsrep_notify_cmd || 0 == strlen(wsrep_notify_cmd))
+  {
+    WSREP_INFO("wsrep_notify_cmd is not defined, skipping notification.");
+    return;
+  }
+
+  const long  cmd_len = (1 << 16) - 1;
+  char* cmd_ptr = (char*) my_malloc(PSI_NOT_INSTRUMENTED, cmd_len + 1, MYF(MY_WME));
+  long  cmd_off = 0;
+
+  if (!cmd_ptr)
+    return; // the warning is in the log
+
+  cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off, "%s",
+                       wsrep_notify_cmd);
+
+  cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off, " --status %s",
+                       to_c_string(status));
+
+  if (view != NULL)
+  {
+    std::ostringstream uuid;
+    uuid << view->state_id().id();
+    cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
+                         " --uuid %s", uuid.str().c_str());
+
+    cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
+                         " --primary %s", view->view_seqno().get() >= 0 ? "yes" : "no");
+
+    cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
+                         " --index %zd", view->own_index());
+
+    const std::vector<wsrep::view::member>& members(view->members());
+    if (members.size())
+    {
+      cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off, " --members");
+
+      for (unsigned int i= 0; i < members.size(); i++)
+      {
+        std::ostringstream id;
+        id << members[i].id();
+        cmd_off += snprintf(cmd_ptr + cmd_off, cmd_len - cmd_off,
+                            "%c%s/%s/%s", i > 0 ? ',' : ' ',
+                            id.str().c_str(),
+                            members[i].name().c_str(),
+                            members[i].incoming().c_str());
+      }
+    }
+  }
+
+  if (cmd_off == cmd_len)
+  {
+    WSREP_ERROR("Notification buffer too short (%ld). Aborting notification.",
+               cmd_len);
+    my_free(cmd_ptr);
+    return;
+  }
+
+  wsp::process p(cmd_ptr, "r", NULL);
+
+  p.wait();
+  int err= p.error();
+
+  if (err)
+  {
+    WSREP_ERROR("Notification command failed: %d (%s): \"%s\"",
+                err, strerror(err), cmd_ptr);
+  }
+  my_free(cmd_ptr);
+}
+