Netconf stack by default locks the data store before issuing

[netconf.git] / netconf / sal-netconf-connector / src / main / java / org / opendaylight / netconf / sal / connect / netconf / sal / LockChangeListener.java

diff --git a/netconf/sal-netconf-connector/src/main/java/org/opendaylight/netconf/sal/connect/netconf/sal/LockChangeListener.java b/netconf/sal-netconf-connector/src/main/java/org/opendaylight/netconf/sal/connect/netconf/sal/LockChangeListener.java
new file mode 100644 (file)
index 0000000..2092057
--- /dev/null
+++ b/netconf/sal-netconf-connector/src/main/java/org/opendaylight/netconf/sal/connect/netconf/sal/LockChangeListener.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2019 Lumina Networks, Inc. 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.netconf.sal.connect.netconf.sal;
+
+import java.util.Collection;
+import org.opendaylight.mdsal.binding.api.DataObjectModification;
+import org.opendaylight.mdsal.binding.api.DataTreeChangeListener;
+import org.opendaylight.mdsal.binding.api.DataTreeModification;
+import org.opendaylight.mdsal.dom.api.DOMDataBroker;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.optional.rev190614.netconf.node.fields.optional.topology.node.DatastoreLock;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+final class LockChangeListener implements DataTreeChangeListener<DatastoreLock> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(LockChangeListener.class);
+
+    private final NetconfDeviceDataBroker netconfDeviceDataBroker;
+
+    LockChangeListener(final DOMDataBroker netconfDeviceDataBrokder) {
+        this.netconfDeviceDataBroker = (NetconfDeviceDataBroker)netconfDeviceDataBrokder;
+    }
+
+    @Override
+    public void onDataTreeChanged(final Collection<DataTreeModification<DatastoreLock>> changes) {
+        for (final DataTreeModification<DatastoreLock> change : changes) {
+            final DataObjectModification<DatastoreLock> rootNode = change.getRootNode();
+            switch (rootNode.getModificationType()) {
+                case SUBTREE_MODIFIED:
+                case WRITE:
+                    if (!rootNode.getDataAfter().isDatastoreLockAllowed()) {
+                        LOG.warn("With blocking the lock/unlock operations, the user is coming to"
+                                 + "operate in a manner which is not supported. It must not exist"
+                                 + "any concurrent access to the data store - it may interfere with"
+                                 + "data consistency.");
+                    }
+                    netconfDeviceDataBroker.setLockAllowed(rootNode.getDataAfter().isDatastoreLockAllowed());
+                    break;
+                case DELETE:
+                    netconfDeviceDataBroker.setLockAllowed(true);
+                    break;
+                default:
+                    LOG.debug("Unsupported modification type: {}.", rootNode.getModificationType());
+            }
+        }
+    }
+}