2 * Copyright IBM Corporation, 2013. All rights reserved.
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
8 package org.opendaylight.controller.md.statistics.manager;
10 import java.util.HashMap;
11 import java.util.Iterator;
12 import java.util.List;
14 import java.util.Map.Entry;
15 import java.util.concurrent.Future;
17 import org.opendaylight.controller.sal.binding.api.data.DataModificationTransaction;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.transaction.rev131103.TransactionAware;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.transaction.rev131103.TransactionId;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRef;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
23 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier.InstanceIdentifierBuilder;
24 import org.opendaylight.yangtools.yang.common.RpcResult;
25 import org.slf4j.Logger;
26 import org.slf4j.LoggerFactory;
28 import com.google.common.base.Function;
29 import com.google.common.base.Preconditions;
30 import com.google.common.util.concurrent.Futures;
31 import com.google.common.util.concurrent.JdkFutureAdapters;
33 abstract class AbstractStatsTracker<I, K> {
34 private static final Logger logger = LoggerFactory.getLogger(AbstractStatsTracker.class);
35 private static final Function<RpcResult<? extends TransactionAware>, TransactionId> FUNCTION =
36 new Function<RpcResult<? extends TransactionAware>, TransactionId>() {
38 public TransactionId apply(RpcResult<? extends TransactionAware> input) {
39 if (!input.isSuccessful()) {
40 logger.debug("Statistics request failed: {}", input.getErrors());
41 throw new RPCFailedException("Failed to send statistics request", input.getErrors());
44 return input.getResult().getTransactionId();
48 private final Map<K, Long> trackedItems = new HashMap<>();
49 private final FlowCapableContext context;
50 private final long lifetimeNanos;
52 protected AbstractStatsTracker(final FlowCapableContext context, final long lifetimeNanos) {
53 this.context = Preconditions.checkNotNull(context);
54 this.lifetimeNanos = lifetimeNanos;
57 protected final InstanceIdentifierBuilder<Node> getNodeIdentifierBuilder() {
58 return InstanceIdentifier.builder(getNodeIdentifier());
61 protected final NodeRef getNodeRef() {
62 return context.getNodeRef();
65 protected final InstanceIdentifier<Node> getNodeIdentifier() {
66 return context.getNodeIdentifier();
69 protected final <T extends TransactionAware> void requestHelper(Future<RpcResult<T>> future) {
70 context.registerTransaction(Futures.transform(JdkFutureAdapters.listenInPoolThread(future), FUNCTION));
73 protected final DataModificationTransaction startTransaction() {
74 return context.startDataModification();
77 protected abstract void cleanupSingleStat(DataModificationTransaction trans, K item);
78 protected abstract K updateSingleStat(DataModificationTransaction trans, I item);
80 public final synchronized void updateStats(List<I> list) {
81 final Long expiryTime = System.nanoTime() + lifetimeNanos;
82 final DataModificationTransaction trans = startTransaction();
84 for (final I item : list) {
85 trackedItems.put(updateSingleStat(trans, item), expiryTime);
91 public final synchronized void cleanup(final DataModificationTransaction trans, long now) {
92 for (Iterator<Entry<K, Long>> it = trackedItems.entrySet().iterator();it.hasNext();){
93 Entry<K, Long> e = it.next();
94 if (now > e.getValue()) {
95 cleanupSingleStat(trans, e.getKey());