renderers/ios-xe/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ios_xe_provider/impl/writer/NodeWriter.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.groupbasedpolicy.renderer.ios_xe_provider.impl.writer;
  10
  11 import com.google.common.util.concurrent.CheckedFuture;
  12 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  13 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  14 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  15 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  16 import org.opendaylight.groupbasedpolicy.renderer.ios_xe_provider.impl.manager.NodeManager;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.RendererName;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.Renderers;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.Renderer;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.RendererKey;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.RendererNodes;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.RendererNodesBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.renderer.nodes.RendererNode;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.renderer.nodes.RendererNodeKey;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 import java.util.ArrayList;
  30 import java.util.List;
  31
  32 public class NodeWriter {
  33
  34     private static final Logger LOG = LoggerFactory.getLogger(NodeWriter.class);
  35     private List<RendererNode> rendererNodesCache;
  36
  37     public NodeWriter() {
  38         rendererNodesCache = new ArrayList<>();
  39     }
  40
  41     public void cache(RendererNode node) {
  42         rendererNodesCache.add(node);
  43     }
  44
  45     /**
  46      * Put all cached items to data store
  47      *
  48      * @param dataBroker appropriate data provider
  49      */
  50     public void commitToDatastore(DataBroker dataBroker) {
  51         RendererNodes rendererNodes = buildRendererNodes();
  52         WriteTransaction wtx = dataBroker.newWriteOnlyTransaction();
  53         InstanceIdentifier<RendererNodes> iid = buildRendererNodesIid();
  54         try {
  55             wtx.merge(LogicalDatastoreType.OPERATIONAL, iid, rendererNodes, true);
  56             CheckedFuture<Void, TransactionCommitFailedException> submitFuture = wtx.submit();
  57             submitFuture.checkedGet();
  58             // Clear cache
  59             rendererNodesCache.clear();
  60         } catch (TransactionCommitFailedException e) {
  61             LOG.error("Write transaction failed to {}", e.getMessage());
  62         } catch (Exception e) {
  63             LOG.error("Failed to .. {}", e.getMessage());
  64         }
  65     }
  66
  67     /**
  68      * Removes all cached items from data store
  69      *
  70      * @param dataBroker appropriate data provider
  71      */
  72     public void removeFromDatastore(DataBroker dataBroker) {
  73         WriteTransaction wtx = dataBroker.newWriteOnlyTransaction();
  74         for (RendererNode nodeToRemove : rendererNodesCache) {
  75             InstanceIdentifier<RendererNode> iid = buildRendererNodeIid(nodeToRemove);
  76             try {
  77                 wtx.delete(LogicalDatastoreType.OPERATIONAL, iid);
  78                 CheckedFuture<Void, TransactionCommitFailedException> submitFuture = wtx.submit();
  79                 submitFuture.checkedGet();
  80                 // Clear cache
  81             } catch (TransactionCommitFailedException e) {
  82                 LOG.error("Write transaction failed to {}", e.getMessage());
  83             } catch (Exception e) {
  84                 LOG.error("Failed to .. {}", e.getMessage());
  85             }
  86         }
  87         rendererNodesCache.clear();
  88     }
  89
  90     private InstanceIdentifier<RendererNodes> buildRendererNodesIid() {
  91         return InstanceIdentifier.builder(Renderers.class)
  92                 .child(Renderer.class, new RendererKey(new RendererName(NodeManager.iosXeRenderer))) // TODO unify renderer name
  93                 .child(RendererNodes.class)
  94                 .build();
  95     }
  96
  97     private InstanceIdentifier<RendererNode> buildRendererNodeIid(RendererNode rendererNode) {
  98         return InstanceIdentifier.builder(Renderers.class)
  99                 .child(Renderer.class, new RendererKey(new RendererName(NodeManager.iosXeRenderer))) // TODO unify renderer name
 100                 .child(RendererNodes.class)
 101                 .child(RendererNode.class, new RendererNodeKey(rendererNode.getNodePath()))
 102                 .build();
 103     }
 104
 105     private RendererNodes buildRendererNodes() {
 106         RendererNodesBuilder rendererNodesBuilder = new RendererNodesBuilder();
 107         rendererNodesBuilder.setRendererNode(new ArrayList<>(rendererNodesCache));
 108         return rendererNodesBuilder.build();
 109     }
 110 }