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