FRM performance refactoring:

[controller.git] / opendaylight / md-sal / forwardingrules-manager / src / main / java / org / opendaylight / controller / frm / impl / AbstractListeningCommiter.java

diff --git a/opendaylight/md-sal/forwardingrules-manager/src/main/java/org/opendaylight/controller/frm/impl/AbstractListeningCommiter.java b/opendaylight/md-sal/forwardingrules-manager/src/main/java/org/opendaylight/controller/frm/impl/AbstractListeningCommiter.java
new file mode 100644 (file)
index 0000000..ec49e61
--- /dev/null
+++ b/opendaylight/md-sal/forwardingrules-manager/src/main/java/org/opendaylight/controller/frm/impl/AbstractListeningCommiter.java
@@ -0,0 +1,134 @@
+/**
+ * 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.frm.impl;
+
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import org.opendaylight.controller.frm.ForwardingRulesCommiter;
+import org.opendaylight.controller.frm.ForwardingRulesManager;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * AbstractChangeListner implemented basic {@link AsyncDataChangeEvent} processing for
+ * flow node subDataObject (flows, groups and meters).
+ *
+ * @author <a href="mailto:vdemcak@cisco.com">Vaclav Demcak</a>
+ *
+ */
+public abstract class AbstractListeningCommiter <T extends DataObject> implements ForwardingRulesCommiter<T> {
+
+    protected ForwardingRulesManager provider;
+
+    protected final Class<T> clazz;
+
+    public AbstractListeningCommiter (ForwardingRulesManager provider, Class<T> clazz) {
+        this.provider = Preconditions.checkNotNull(provider, "ForwardingRulesManager can not be null!");
+        this.clazz = Preconditions.checkNotNull(clazz, "Class can not be null!");
+    }
+
+    @Override
+    public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changeEvent) {
+        Preconditions.checkNotNull(changeEvent,"Async ChangeEvent can not be null!");
+
+        /* All DataObjects for create */
+        final Map<InstanceIdentifier<?>, DataObject> createdData = changeEvent.getCreatedData() != null
+                ? changeEvent.getCreatedData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
+        /* All DataObjects for remove */
+        final Set<InstanceIdentifier<?>> removeData = changeEvent.getRemovedPaths() != null
+                ? changeEvent.getRemovedPaths() : Collections.<InstanceIdentifier<?>> emptySet();
+        /* All DataObjects for updates */
+        final Map<InstanceIdentifier<?>, DataObject> updateData = changeEvent.getUpdatedData() != null
+                ? changeEvent.getUpdatedData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
+        /* All Original DataObjects */
+        final Map<InstanceIdentifier<?>, DataObject> originalData = changeEvent.getOriginalData() != null
+                ? changeEvent.getOriginalData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
+
+        this.createData(createdData);
+        this.updateData(updateData, originalData);
+        this.removeData(removeData, originalData);
+    }
+
+    /**
+     * Method return wildCardPath for Listener registration
+     * and for identify the correct KeyInstanceIdentifier from data;
+     */
+    protected abstract InstanceIdentifier<T> getWildCardPath();
+
+
+
+    @SuppressWarnings("unchecked")
+    private void createData(final Map<InstanceIdentifier<?>, DataObject> createdData) {
+        final Set<InstanceIdentifier<?>> keys = createdData.keySet() != null
+                ? createdData.keySet() : Collections.<InstanceIdentifier<?>> emptySet();
+        for (InstanceIdentifier<?> key : keys) {
+            if (clazz.equals(key.getTargetType())) {
+                final InstanceIdentifier<FlowCapableNode> nodeIdent =
+                        key.firstIdentifierOf(FlowCapableNode.class);
+                if (preConfigurationCheck(nodeIdent)) {
+                    InstanceIdentifier<T> createKeyIdent = key.firstIdentifierOf(clazz);
+                    final Optional<DataObject> value = Optional.of(createdData.get(key));
+                    if (value.isPresent()) {
+                        this.add(createKeyIdent, (T)value.get(), nodeIdent);
+                    }
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void updateData(final Map<InstanceIdentifier<?>, DataObject> updateData,
+            final Map<InstanceIdentifier<?>, DataObject> originalData) {
+
+        final Set<InstanceIdentifier<?>> keys = updateData.keySet() != null
+                ? updateData.keySet() : Collections.<InstanceIdentifier<?>> emptySet();
+        for (InstanceIdentifier<?> key : keys) {
+            if (clazz.equals(key.getTargetType())) {
+                final InstanceIdentifier<FlowCapableNode> nodeIdent =
+                        key.firstIdentifierOf(FlowCapableNode.class);
+                if (preConfigurationCheck(nodeIdent)) {
+                    InstanceIdentifier<T> updateKeyIdent = key.firstIdentifierOf(clazz);
+                    final Optional<DataObject> value = Optional.of(updateData.get(key));
+                    final Optional<DataObject> original = Optional.of(originalData.get(key));
+                    if (value.isPresent() && original.isPresent()) {
+                        this.update(updateKeyIdent, (T)original.get(), (T)value.get(), nodeIdent);
+                    }
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void removeData(final Set<InstanceIdentifier<?>> removeData,
+            final Map<InstanceIdentifier<?>, DataObject> originalData) {
+
+        for (InstanceIdentifier<?> key : removeData) {
+            if (clazz.equals(key.getTargetType())) {
+                final InstanceIdentifier<FlowCapableNode> nodeIdent =
+                        key.firstIdentifierOf(FlowCapableNode.class);
+                if (preConfigurationCheck(nodeIdent)) {
+                    final InstanceIdentifier<T> ident = key.firstIdentifierOf(clazz);
+                    final DataObject removeValue = originalData.get(key);
+                    this.remove(ident, (T)removeValue, nodeIdent);
+                }
+            }
+        }
+    }
+
+    private boolean preConfigurationCheck(final InstanceIdentifier<FlowCapableNode> nodeIdent) {
+        Preconditions.checkNotNull(nodeIdent, "FlowCapableNode ident can not be null!");
+        return provider.isNodeActive(nodeIdent);
+    }
+}
+