--- /dev/null
+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.sal.connection;
+
+import java.util.Map;
+
+import org.opendaylight.controller.sal.core.Node;
+import org.opendaylight.controller.sal.utils.Status;
+
+/**
+ * Interface that defines the methods available to the functional modules that operate
+ * above SAL for disconnecting or connecting to a particular node.
+ */
+public interface IConnectionService {
+ /**
+ * Connect to a node with a specified node type.
+ *
+ * @param type Type of the node representing NodeIDType.
+ * @param connectionIdentifier Convenient identifier for the applications to make use of
+ * @param params Connection Params in Map format. This is entirely handled by the south-bound
+ * plugins and is an opaque value for SAL. Typical values keyed inside this params are
+ * Management IP-Address, Username, Password, Security Keys, etc...
+ *
+ * @return Node {@link org.opendaylight.controller.sal.core.Node}
+ */
+ public Node connect (String type, String connectionIdentifier, Map<ConnectionConstants, String> params);
+
+ /**
+ * Discover the node type and Connect to the first plugin that is able to connect with the specified parameters.
+ *
+ * @param type Type of the node representing NodeIDType.
+ * @param connectionIdentifier Convenient identifier for the applications to make use of
+ * @param params Connection Params in Map format. This is entirely handled by the south-bound
+ * plugins and is an opaque value for SAL. Typical values keyed inside this params are
+ * Management IP-Address, Username, Password, Security Keys, etc...
+ *
+ * @return Node {@link org.opendaylight.controller.sal.core.Node}
+ */
+ public Node connect (String connectionIdentifier, Map<ConnectionConstants, String> params);
+
+ /**
+ * Disconnect a Node that is connected to this Controller.
+ *
+ * @param node
+ * the node {@link org.opendaylight.controller.sal.core.Node}
+ * @return Status {@link org.opendaylight.controller.sal.utils.Status}
+ */
+ public Status disconnect(Node node);
+
+ /**
+ * View Change notification
+ *
+ * @param node
+ * the node {@link org.opendaylight.controller.sal.core.Node}
+ */
+ public void notifyNodeDisconnectFromMaster(Node node);
+
+ /**
+ * View Change notification
+ */
+ public void notifyClusterViewChanged();
+}
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