Add Flow utils

Change-Id: I120391618945908c358c4da4728ad0c5243c721f
Signed-off-by: Sam Hague <shague@redhat.com>

diff --git a/utils/mdsal-openflow/src/main/java/org/opendaylight/ovsdb/utils/mdsal/openflow/FlowUtils.java b/utils/mdsal-openflow/src/main/java/org/opendaylight/ovsdb/utils/mdsal/openflow/FlowUtils.java
new file mode 100644 (file)
index 0000000..475c073
--- /dev/null
+++ b/utils/mdsal-openflow/src/main/java/org/opendaylight/ovsdb/utils/mdsal/openflow/FlowUtils.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2015 Red Hat, 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.ovsdb.utils.mdsal.openflow;
+
+import com.google.common.base.Optional;
+import java.util.concurrent.ExecutionException;
+import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.Table;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.TableKey;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.FlowBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorId;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class FlowUtils {
+    private static final Logger LOG = LoggerFactory.getLogger(FlowUtils.class);
+    private static final String OPENFLOW = "openflow";
+
+    public static String getNodeName(long dpidLong) {
+        return OPENFLOW + ":" + dpidLong;
+    }
+
+    public static NodeConnectorId getNodeConnectorId(long ofPort, String nodeName) {
+        return new NodeConnectorId(nodeName + ":" + ofPort);
+    }
+
+    public static NodeConnectorId getNodeConnectorId(long dpidLong, long ofPort) {
+        return getNodeConnectorId(ofPort, getNodeName(dpidLong));
+    }
+
+    public static NodeBuilder createNodeBuilder(String nodeId) {
+        NodeBuilder builder = new NodeBuilder();
+        builder.setId(new NodeId(nodeId));
+        builder.setKey(new NodeKey(builder.getId()));
+        return builder;
+    }
+
+    public static NodeBuilder createNodeBuilder(long dpidLong) {
+        return createNodeBuilder(getNodeName(dpidLong));
+    }
+
+    public static InstanceIdentifier<Flow> createFlowPath(FlowBuilder flowBuilder, NodeBuilder nodeBuilder) {
+        return InstanceIdentifier.builder(Nodes.class)
+                .child(Node.class, nodeBuilder.getKey())
+                .augmentation(FlowCapableNode.class)
+                .child(Table.class, new TableKey(flowBuilder.getTableId()))
+                .child(Flow.class, flowBuilder.getKey()).build();
+    }
+
+    public static InstanceIdentifier<Node> createNodePath(NodeBuilder nodeBuilder) {
+        return InstanceIdentifier.builder(Nodes.class).child(Node.class, nodeBuilder.getKey()).build();
+    }
+
+    public static Flow getFlow(FlowBuilder flowBuilder, NodeBuilder nodeBuilder,
+                               ReadOnlyTransaction readTx, final LogicalDatastoreType store) {
+        try {
+            Optional<Flow> data = readTx.read(store, createFlowPath(flowBuilder, nodeBuilder)).get();
+            if (data.isPresent()) {
+                return data.get();
+            }
+        } catch (InterruptedException|ExecutionException e) {
+            LOG.error(e.getMessage(), e);
+        }
+
+        LOG.info("Cannot find data for Flow {}", flowBuilder.getFlowName());
+        return null;
+    }
+}