- Fixed wsrep_listener.c compilation

 - Moved wsrep_listener.c to under examples directory
 - Updated README.md
 - Updated .gitignore

Author: ayurchen

.gitignore

@@ -1,3 +1,8 @@
 *.o
 *.a
+*.diff
 listener
+CMakeFiles
+CMakeCache.txt
+cmake_install.cmake
+Makefile

CMakeLists.txt

@@ -23,5 +23,4 @@ SET(WSREP_SOURCES wsrep_gtid.c wsrep_uuid.c wsrep_loader.c wsrep_dummy.c)
 
 ADD_LIBRARY(wsrep ${WSREP_SOURCES})
 
-#ADD_EXECUTABLE(listener wsrep_listener.c ${WSREP_SOURCES})
-#TARGET_LINK_LIBRARIES(listener ${LIBDL})
+ADD_SUBDIRECTORY(examples)

README.md

@@ -1 +1,6 @@
-Write Set Replication API specification
+# Write Set Replication API specification
+
+Building:
+```
+cmake . && make
+```

examples/CMakeLists.txt

@@ -0,0 +1,17 @@
+# Copyright (c) 2018, Codership Oy. All rights reserved.
+#
+# 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 St, Fifth Floor, Boston, MA  02110-1301 USA
+
+ADD_EXECUTABLE(listener listener.c)
+TARGET_LINK_LIBRARIES(listener wsrep dl pthread)

examples/README.md

@@ -0,0 +1,5 @@
+## wsrep API usage examples
+
+### 1. Listener
+Is a simple program that connects and listens to replication events in
+an existing cluster.

wsrep_listener.c renamed to examples/listener.c

@@ -85,7 +85,7 @@ sst_request_cb (void*             app_ctx __attribute__((unused)),
     if (*sst_req)
         *sst_req_len = strlen(*sst_req) + 1;
     else
-        *sst_req_len = -ENOMEM;
+        *sst_req_len = 0;
 
     return WSREP_CB_SUCCESS;
 }
@@ -219,11 +219,15 @@ int main (int argc, char* argv[])
     }
 
     /* Connect to cluster */
-    rc = wsrep->connect (wsrep, cluster_name, wsrep_uri, "", 0);
+    rc = wsrep->connect(wsrep, cluster_name, wsrep_uri, "", 0);
     if (0 != rc)
     {
-        fprintf (stderr,
-                 "wsrep::connect() failed: %d (%s)\n", rc, strerror(-rc));
+        if (rc < 0)
+            fprintf (stderr, "wsrep::connect() failed: %d (%s)\n", rc,
+                     strerror(-(int)rc));
+        else
+            fprintf (stderr, "wsrep::connect() failed: %d\n", rc);
+
         exit (EXIT_FAILURE);
     }