diff --git a/events.cpp b/events.cpp
new file mode 100644
index 0000000..41a6e5f
--- /dev/null
+++ b/events.cpp
@@ -0,0 +1,99 @@
+/**
+ * Copyright © 2017 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "events.hpp"
+#include <sdbusplus/bus.hpp>
+
+namespace phosphor
+{
+namespace inventory
+{
+namespace manager
+{
+namespace filters
+{
+namespace details
+{
+namespace property_condition
+{
+
+bool PropertyConditionBase::operator()(
+    sdbusplus::bus::bus& bus,
+    sdbusplus::message::message&,
+    Manager&) const
+{
+    std::string host;
+
+    if (_service)
+    {
+        host.assign(_service);
+    }
+    else
+    {
+        auto mapperCall = bus.new_method_call(
+                              "xyz.openbmc_project.ObjectMapper",
+                              "/xyz/openbmc_project/ObjectMapper",
+                              "xyz.openbmc_project.ObjectMapper",
+                              "GetObject");
+        mapperCall.append(_path);
+        mapperCall.append(std::vector<std::string>({_iface}));
+
+        auto mapperResponseMsg = bus.call(mapperCall);
+        if (mapperResponseMsg.is_method_error())
+        {
+            return false;
+        }
+
+        std::map<std::string, std::vector<std::string>> mapperResponse;
+        mapperResponseMsg.read(mapperResponse);
+
+        if (mapperResponse.begin() == mapperResponse.end())
+        {
+            return false;
+        }
+
+        host = mapperResponse.begin()->first;
+
+        if (host == bus.get_unique_name())
+        {
+            // TODO I can't call myself here.
+            return false;
+        }
+    }
+    auto hostCall = bus.new_method_call(
+                        host.c_str(),
+                        _path.c_str(),
+                        "org.freedesktop.DBus.Properties",
+                        "Get");
+    hostCall.append(_iface);
+    hostCall.append(_property);
+
+    auto hostResponseMsg = bus.call(hostCall);
+    if (hostResponseMsg.is_method_error())
+    {
+        return false;
+    }
+
+    return eval(hostResponseMsg);
+}
+
+} // namespace property_condition
+} // namespace details
+} // namespace filters
+} // namespace manager
+} // namespace inventory
+} // namespace phosphor
+
+// vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4