BUG-1018 Implement BackwardsCompatible BI broker data notifications

[controller.git] / opendaylight / md-sal / sal-dom-broker / src / main / java / org / opendaylight / controller / md / sal / dom / broker / impl / compat / TranslatingListenerInvoker.java

diff --git a/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/broker/impl/compat/TranslatingListenerInvoker.java b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/broker/impl/compat/TranslatingListenerInvoker.java
new file mode 100644 (file)
index 0000000..1ce252d
--- /dev/null
+++ b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/broker/impl/compat/TranslatingListenerInvoker.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2014 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.md.sal.dom.broker.impl.compat;
+
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
+import org.opendaylight.controller.md.sal.common.api.data.DataChangeEvent;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizer;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataBroker;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataChangeListener;
+import org.opendaylight.controller.sal.core.api.data.DataChangeListener;
+import org.opendaylight.yangtools.concepts.Delegator;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.data.api.CompositeNode;
+import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+
+abstract class TranslatingListenerInvoker implements AutoCloseable, DOMDataChangeListener, Delegator<DataChangeListener> {
+
+    private final DataChangeListener delegate;
+    private final DataNormalizer normalizer;
+    protected ListenerRegistration<DOMDataChangeListener> reg;
+
+    protected TranslatingListenerInvoker(final DataChangeListener listener, final DataNormalizer normalizer) {
+        this.delegate = listener;
+        this.normalizer = normalizer;
+    }
+
+    static TranslatingListenerInvoker createConfig(final DataChangeListener listener, final DataNormalizer normalizer) {
+        return new TranslatingConfigListenerInvoker(listener, normalizer);
+    }
+
+    static TranslatingListenerInvoker createOperational(final DataChangeListener listener, final DataNormalizer normalizer) {
+        return new TranslatingOperationalListenerInvoker(listener, normalizer);
+    }
+
+    @Override
+    public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier, NormalizedNode<?, ?>> normalizedChange) {
+        delegate.onDataChanged(getLegacyEvent(normalizer, normalizedChange));
+    }
+
+    abstract DataChangeEvent<InstanceIdentifier, CompositeNode> getLegacyEvent(final DataNormalizer normalizer,
+                                                                               final AsyncDataChangeEvent<InstanceIdentifier, NormalizedNode<?, ?>> normalizedChange);
+
+    @Override
+    public DataChangeListener getDelegate() {
+        return delegate;
+    }
+
+    abstract void register(final DOMDataBroker backingBroker, final InstanceIdentifier normalizedPath);
+
+    @Override
+    public void close() {
+        if (reg != null) {
+            reg.close();
+        }
+    }
+
+    static final class TranslatingConfigListenerInvoker extends TranslatingListenerInvoker {
+
+        public TranslatingConfigListenerInvoker(final DataChangeListener listener, final DataNormalizer normalizer) {
+            super(listener, normalizer);
+        }
+
+        DataChangeEvent<InstanceIdentifier, CompositeNode> getLegacyEvent(final DataNormalizer normalizer, final AsyncDataChangeEvent<InstanceIdentifier, NormalizedNode<?, ?>> normalizedChange) {
+            return TranslatingDataChangeEvent.createConfiguration(normalizedChange, normalizer);
+        }
+
+        @Override
+        void register(final DOMDataBroker backingBroker, final InstanceIdentifier normalizedPath) {
+            reg = backingBroker.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION, normalizedPath, this,
+                    AsyncDataBroker.DataChangeScope.SUBTREE);
+        }
+    }
+
+    static final class TranslatingOperationalListenerInvoker extends TranslatingListenerInvoker {
+
+        public TranslatingOperationalListenerInvoker(final DataChangeListener listener, final DataNormalizer normalizer) {
+            super(listener, normalizer);
+        }
+
+        DataChangeEvent<InstanceIdentifier, CompositeNode> getLegacyEvent(final DataNormalizer normalizer, final AsyncDataChangeEvent<InstanceIdentifier, NormalizedNode<?, ?>> normalizedChange) {
+            return TranslatingDataChangeEvent.createOperational(normalizedChange, normalizer);
+        }
+
+        @Override
+        void register(final DOMDataBroker backingBroker, final InstanceIdentifier normalizedPath) {
+            reg = backingBroker.registerDataChangeListener(LogicalDatastoreType.OPERATIONAL, normalizedPath, this,
+                    AsyncDataBroker.DataChangeScope.SUBTREE);
+        }
+    }
+
+}