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.Collection;
  12 import java.util.concurrent.atomic.AtomicLong;
  13 import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;
  14 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  17 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  18 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  19 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  20 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  21 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  22 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.data.change.counter.rev160315.DataChangeCounter;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.data.change.counter.rev160315.data.change.counter.Counter;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.data.change.counter.rev160315.data.change.counter.CounterBuilder;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.data.change.counter.rev160315.data.change.counter.CounterKey;
  27 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  28 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 public class TopologyDataChangeCounter implements ClusteredDataTreeChangeListener<Topology>, TransactionChainListener {
  33
  34     private static final Logger LOG = LoggerFactory.getLogger(TopologyDataChangeCounter.class);
  35
  36     private final DataBroker dataBroker;
  37     private final String counterId;
  38     private final InstanceIdentifier<Counter> counterInstanceId;
  39     private final BindingTransactionChain chain;
  40     private final AtomicLong count;
  41
  42     public TopologyDataChangeCounter(final DataBroker dataBroker, final String counterId) {
  43         this.dataBroker = dataBroker;
  44         this.chain = this.dataBroker.createTransactionChain(this);
  45         this.counterId = counterId;
  46         this.counterInstanceId = InstanceIdentifier.builder(DataChangeCounter.class)
  47                 .child(Counter.class, new CounterKey(this.counterId)).build();
  48         this.count = new AtomicLong(0);
  49         putCount(this.count.get());
  50         LOG.debug("Data change counter {} initiated", this.counterId);
  51     }
  52
  53     @Override
  54     public void onDataTreeChanged(final Collection<DataTreeModification<Topology>> changes) {
  55         putCount(this.count.incrementAndGet());
  56         LOG.debug("Data change #{} for counter {}", this.count.get(), this.counterId);
  57     }
  58
  59     public void close() {
  60         final WriteTransaction wTx = this.dataBroker.newWriteOnlyTransaction();
  61         wTx.delete(LogicalDatastoreType.OPERATIONAL, this.counterInstanceId);
  62         try {
  63             wTx.submit().checkedGet();
  64         } catch (TransactionCommitFailedException except) {
  65             LOG.warn("Error on remove data change counter {}", this.counterId, except);
  66         }
  67         this.chain.close();
  68         LOG.debug("Data change counter {} removed", this.counterId);
  69     }
  70
  71     private void putCount(final long count) {
  72         final WriteTransaction wTx = this.chain.newWriteOnlyTransaction();
  73         Counter counter = new CounterBuilder().setId(this.counterId).setCount(count).build();
  74         wTx.put(LogicalDatastoreType.OPERATIONAL, this.counterInstanceId, counter);
  75         wTx.submit();
  76     }
  77
  78     @Override
  79     public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
  80         chain.close();
  81         LOG.warn("Transaction chain failure. Transaction: {}", transaction, cause);
  82     }
  83
  84     @Override
  85     public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
  86         LOG.debug("Transaction chain successful. {}", chain);
  87     }
  88
  89 }