Vendor integration dependencies.

integration/vendor/github.com/mesos/mesos-go/detector/interface.go

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+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+package detector
+
+import (
+	mesos "github.com/mesos/mesos-go/mesosproto"
+)
+
+type MasterChanged interface {
+	// Invoked when the master changes
+	OnMasterChanged(*mesos.MasterInfo)
+}
+
+// AllMasters defines an optional interface that, if implemented by the same
+// struct as implements MasterChanged, will receive an additional callbacks
+// independently of leadership changes. it's possible that, as a result of a
+// leadership change, both the OnMasterChanged and UpdatedMasters callbacks
+// would be invoked.
+//
+// **NOTE:** Detector implementations are not required to support this optional
+// interface. Please RTFM of the detector implementation that you want to use.
+type AllMasters interface {
+	// UpdatedMasters is invoked upon a change in the membership of mesos
+	// masters, and is useful to clients that wish to know the entire set
+	// of Mesos masters currently running.
+	UpdatedMasters([]*mesos.MasterInfo)
+}
+
+// func/interface adapter
+type OnMasterChanged func(*mesos.MasterInfo)
+
+func (f OnMasterChanged) OnMasterChanged(mi *mesos.MasterInfo) {
+	f(mi)
+}
+
+// An abstraction of a Master detector which can be used to
+// detect the leading master from a group.
+type Master interface {
+	// Detect new master election. Every time a new master is elected, the
+	// detector will alert the observer. The first call to Detect is expected
+	// to kickstart any background detection processing (and not before then).
+	// If detection startup fails, or the listener cannot be added, then an
+	// error is returned.
+	Detect(MasterChanged) error
+
+	// returns a chan that, when closed, indicates the detector has terminated
+	Done() <-chan struct{}
+
+	// cancel the detector. it's ok to call this multiple times, or even if
+	// Detect() hasn't been invoked yet.
+	Cancel()
+}