data-change-counter/src/main/java/org/opendaylight/protocol/data/change/counter/TopologyDataChangeCounter.java

   1 /*
   2  * Copyright (c) 2014 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.protocol.data.change.counter;
  10
  11 import java.util.concurrent.atomic.AtomicLong;
  12 import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;
  13 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  14 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  15 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  16 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  17 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  18 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  19 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  20 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  21 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.data.change.counter.rev140815.DataChangeCounter;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.data.change.counter.rev140815.DataChangeCounterBuilder;
  24 import org.opendaylight.yangtools.yang.binding.DataObject;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 public class TopologyDataChangeCounter implements DataChangeListener, TransactionChainListener {
  30
  31     private static final Logger LOG = LoggerFactory.getLogger(TopologyDataChangeCounter.class);
  32
  33     protected static final InstanceIdentifier<DataChangeCounter> IID = InstanceIdentifier
  34             .builder(DataChangeCounter.class).build();
  35
  36     private final DataBroker dataBroker;
  37     private final BindingTransactionChain chain;
  38     private final AtomicLong count;
  39
  40     public TopologyDataChangeCounter(final DataBroker dataBroker) {
  41         this.dataBroker = dataBroker;
  42         this.chain = this.dataBroker.createTransactionChain(this);
  43         this.count = new AtomicLong(0);
  44         putCount(this.count.get());
  45         LOG.debug("Data change counter initiated");
  46     }
  47
  48     @Override
  49     public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> change) {
  50         putCount(this.count.incrementAndGet());
  51         LOG.debug("Data change #{}", this.count.get());
  52     }
  53
  54     public void close() {
  55         final WriteTransaction wTx = this.dataBroker.newWriteOnlyTransaction();
  56         wTx.delete(LogicalDatastoreType.OPERATIONAL, IID);
  57         try {
  58             wTx.submit().checkedGet();
  59         } catch (TransactionCommitFailedException except) {
  60             LOG.warn("Error on remove  data change counter{}", IID.toString(), except);
  61         }
  62         this.chain.close();
  63         LOG.debug("Data change counter removed");
  64     }
  65
  66     private void putCount(final long count) {
  67         final WriteTransaction wTx = this.chain.newWriteOnlyTransaction();
  68         wTx.put(LogicalDatastoreType.OPERATIONAL, IID, new DataChangeCounterBuilder().setCount(count).build());
  69         wTx.submit();
  70     }
  71
  72     @Override
  73     public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
  74         chain.close();
  75         LOG.warn("Transaction chain failure. Transaction: {}", transaction, cause);
  76     }
  77
  78     @Override
  79     public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
  80         LOG.debug("Transaction chain successful. {}", chain);
  81     }
  82
  83 }