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zk-eventmachine's Issues

compile fail on centOS7

I get the following when I try to 'gem install zk-eventmachine'

make[1]: Leaving directory `/usr/local/lib/ruby/gems/2.2.0/gems/zookeeper-1.3.0/ext/c'
checking for rb_thread_blocking_region()... no
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling event_lib.c
compiling zkrb_wrapper_compat.c
compiling zkrb_wrapper.c
compiling zkrb.c
In file included from /usr/local/include/ruby-2.2.0/ruby.h:33:0,
                 from zkrb.c:68:
zkrb.c: In function ‘get_call_type’:
/usr/local/include/ruby-2.2.0/ruby/ruby.h:422:18: error: expected ‘(’ before ‘!’ token
 #define RTEST(v) !(((VALUE)(v) & ~Qnil) == 0)
                  ^
zkrb.c:148:6: note: in expansion of macro ‘RTEST’
   if RTEST(async) {
      ^
zkrb.c:148:19: error: expected ‘;’ before ‘{’ token
   if RTEST(async) {
                   ^
In file included from /usr/local/include/ruby-2.2.0/ruby.h:33:0,
                 from zkrb.c:68:
zkrb.c: In function ‘get_self_pipe_read_fd’:
/usr/local/include/ruby-2.2.0/ruby/ruby.h:423:18: error: expected ‘(’ before ‘!’ token
 #define NIL_P(v) !((VALUE)(v) != Qnil)
                  ^
zkrb.c:761:6: note: in expansion of macro ‘NIL_P’
   if NIL_P(pipe_read)
      ^
zkrb.c:762:7: error: expected ‘;’ before ‘rb_raise’
       rb_raise(rb_eRuntimeError, "@pipe_read was nil!");
       ^
make: *** [zkrb.o] Error 1

make failed, exit code 2

Gem files will remain installed in /usr/local/lib/ruby/gems/2.2.0/gems/zookeeper-1.3.0 for inspection.
Results logged to /usr/local/lib/ruby/gems/2.2.0/extensions/x86_64-linux/2.2.0-static/zookeeper-1.3.0/gem_make.out

This is on CentOS Linux release 7.1.1503 (Core) and I am using ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-linux].

What is going wrong? Can I fix this? Also I noticed this repo hasn't gotten many updates in a long time so is this gem feature complete or dead?

On_connection_close event does not get fired

Want to thank you first for all the work on Ruby Zookeeper, Jonathan!
zk-eventmachine has been working great for me except for the following:

I want my program to receive a notification when a zookeeper server disconnects.
I am overwriting the on_connection_lost method in the following way:

require 'zk-eventmachine'
require 'pp'

Zookeeper.set_debug_level(4)

@zkem = ZK::ZKEventMachine::Client.new("127.0.0.1:2181")

@zkem.on_connection_lost do |event|
  pp ["==== zookeeper disconnected"]
end

EM.run {
  @zkem.connect do
    puts
    pp ["connected"]
  end
}

However, the on_connection_lost event never gets fired even though the events from C library pass by :(

["connected"]
DEBUG 0x101768000:zookeeper_lib.c:375: ZOOKEEPER_C_STATE WATCHER type = -1, state = 3, path = 0x7fb25a25a290, value = 

DEBUG 0x101662000:zookeeper_c.c:543: obj_id: 3fd92ce3714c, read 1 bytes from the queue (0x7fb25a188c40)'s pipe
DEBUG 0x101662000:zookeeper_lib.c:302: zkrb_event_to_ruby ZKRB_WATCHER

DEBUG 0x101768000:zookeeper_lib.c:375: ZOOKEEPER_C_STATE WATCHER type = -1, state = 1, path = 0x7fb25a12acb0, value = 

DEBUG 0x101662000:zookeeper_c.c:543: obj_id: 3fd92ce3714c, read 1 bytes from the queue (0x7fb25a188c40)'s pipe
DEBUG 0x101662000:zookeeper_lib.c:302: zkrb_event_to_ruby ZKRB_WATCHER

duplicate events

Getting a znode with :watch => true seems to somehow cause all on_connecting/on_connected/etc events to be subscribed again causing them to fire multiple times.

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