1 files changed, 62 insertions, 0 deletions
diff --git a/lib/ansible/playbook/handler.py b/lib/ansible/playbook/handler.py
new file mode 100644
index 0000000..675eecb
--- /dev/null
+++ b/lib/ansible/playbook/handler.py
@@ -0,0 +1,62 @@
+# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
+#
+# This file is part of Ansible
+#
+# Ansible 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, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible 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 Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+# Make coding more python3-ish
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+from ansible.playbook.attribute import FieldAttribute
+from ansible.playbook.task import Task
+from ansible.module_utils.six import string_types
+
+
+class Handler(Task):
+
+    listen = FieldAttribute(isa='list', default=list, listof=string_types, static=True)
+
+    def __init__(self, block=None, role=None, task_include=None):
+        self.notified_hosts = []
+
+        self.cached_name = False
+
+        super(Handler, self).__init__(block=block, role=role, task_include=task_include)
+
+    def __repr__(self):
+        ''' returns a human readable representation of the handler '''
+        return "HANDLER: %s" % self.get_name()
+
+    @staticmethod
+    def load(data, block=None, role=None, task_include=None, variable_manager=None, loader=None):
+        t = Handler(block=block, role=role, task_include=task_include)
+        return t.load_data(data, variable_manager=variable_manager, loader=loader)
+
+    def notify_host(self, host):
+        if not self.is_host_notified(host):
+            self.notified_hosts.append(host)
+            return True
+        return False
+
+    def remove_host(self, host):
+        self.notified_hosts = [h for h in self.notified_hosts if h != host]
+
+    def is_host_notified(self, host):
+        return host in self.notified_hosts
+
+    def serialize(self):
+        result = super(Handler, self).serialize()
+        result['is_handler'] = True
+        return result