eventsapi: Fix disable-events issue

Events related sources are not loaded in libglusterfs when
configure is run with --disable-events option. Due to this
every call of gf_event should be guarded with USE_EVENTS macro.

To prevent this, USE_EVENTS macro was included in events.c
itself(Patch #15054)

Instead of disabling building entire directory "events", selectively
disabled the code. So that constants and empty function gf_event is
exposed. Code will not fail even if gf_event is called when events is
disabled.

BUG: 1368042
Change-Id: Ia6abfe9c1e46a7640c4d8ff5ccf0e9c30c87f928
Signed-off-by: Aravinda VK <avishwan@redhat.com>
Reviewed-on: http://review.gluster.org/15198
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>

5 files changed, 22 insertions, 8 deletions

diff --git a/events/Makefile.am b/events/Makefile.am
index 04a74efc228..264bb742a80 100644
--- a/events/Makefile.am
+++ b/events/Makefile.am
@@ -1,6 +1,8 @@
 SUBDIRS = src tools
-
+EXTRA_DIST = eventskeygen.py
 noinst_PYTHON = eventskeygen.py
 
+if BUILD_EVENTS
 install-data-hook:
 	$(INSTALL) -d -m 755 $(DESTDIR)@GLUSTERD_WORKDIR@/events
+endif
diff --git a/events/src/Makefile.am b/events/src/Makefile.am
index 423bc8891fb..d292fbebc12 100644
--- a/events/src/Makefile.am
+++ b/events/src/Makefile.am
@@ -6,18 +6,21 @@ BUILT_SOURCES = eventtypes.py
 CLEANFILES = eventtypes.py
 
 eventsdir = $(libexecdir)/glusterfs/events
+events_PYTHON = __init__.py gf_event.py eventsapiconf.py eventtypes.py \
+	utils.py
+
+eventtypes.py:
+	$(PYTHON) $(top_srcdir)/events/eventskeygen.py PY_HEADER
+
+if BUILD_EVENTS
 eventspeerscriptdir = $(libexecdir)/glusterfs
 eventsconfdir = $(sysconfdir)/glusterfs
 eventsconf_DATA = eventsconfig.json
 
-events_PYTHON = __init__.py eventsapiconf.py eventtypes.py handlers.py \
-	utils.py gf_event.py
+events_PYTHON += handlers.py
 events_SCRIPTS = glustereventsd.py
 eventspeerscript_SCRIPTS = peer_eventsapi.py
 
-eventtypes.py: $(top_srcdir)/events/eventskeygen.py
-	$(PYTHON) $(top_srcdir)/events/eventskeygen.py PY_HEADER
-
 install-exec-hook:
 	$(mkdir_p) $(DESTDIR)$(sbindir)
 	rm -f $(DESTDIR)$(sbindir)/glustereventsd
@@ -30,3 +33,5 @@ install-exec-hook:
 uninstall-hook:
 	rm -f $(DESTDIR)$(sbindir)/glustereventsd
 	rm -f $(DESTDIR)$(sbindir)/gluster-eventsapi
+
+endif
diff --git a/events/src/eventsapiconf.py.in b/events/src/eventsapiconf.py.in
index 702e1d21820..03dd0e8d5d7 100644
--- a/events/src/eventsapiconf.py.in
+++ b/events/src/eventsapiconf.py.in
@@ -20,3 +20,4 @@ EVENTSD = "glustereventsd"
 CONFIG_KEYS = ["log_level"]
 BOOL_CONFIGS = []
 RESTART_CONFIGS = []
+EVENTS_ENABLED = @EVENTS_ENABLED@
diff --git a/events/src/gf_event.py b/events/src/gf_event.py
index 0924a65dddb..20dfc8a4f17 100644
--- a/events/src/gf_event.py
+++ b/events/src/gf_event.py
@@ -13,7 +13,7 @@
 import socket
 import time
 
-from eventsapiconf import SERVER_ADDRESS
+from eventsapiconf import SERVER_ADDRESS, EVENTS_ENABLED
 from eventtypes import all_events
 
 from utils import logger, setup_logger
@@ -23,6 +23,9 @@ setup_logger()
 
 
 def gf_event(event_type, **kwargs):
+    if EVENTS_ENABLED == 0:
+        return
+
     if not isinstance(event_type, int) or event_type >= len(all_events):
         logger.error("Invalid Event Type: {0}".format(event_type))
         return
diff --git a/events/tools/Makefile.am b/events/tools/Makefile.am
index 7d5e331e4e1..fb6770cf070 100644
--- a/events/tools/Makefile.am
+++ b/events/tools/Makefile.am
@@ -1,3 +1,6 @@
+EXTRA_DIST = eventsdash.py
+
+if BUILD_EVENTS
 scriptsdir = $(datadir)/glusterfs/scripts
 scripts_SCRIPTS = eventsdash.py
-EXTRA_DIST = eventsdash.py
+endif