opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/FrontendClientMetadataBuilder.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 package org.opendaylight.controller.cluster.datastore;
   9
  10 import com.google.common.base.Preconditions;
  11 import com.google.common.collect.Collections2;
  12 import com.google.common.collect.Range;
  13 import com.google.common.collect.RangeSet;
  14 import com.google.common.collect.TreeRangeSet;
  15 import com.google.common.primitives.UnsignedLong;
  16 import java.util.HashMap;
  17 import java.util.Map;
  18 import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
  19 import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
  20 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
  21 import org.opendaylight.controller.cluster.datastore.persisted.FrontendClientMetadata;
  22 import org.opendaylight.controller.cluster.datastore.persisted.FrontendHistoryMetadata;
  23 import org.opendaylight.yangtools.concepts.Builder;
  24 import org.opendaylight.yangtools.concepts.Identifiable;
  25
  26 final class FrontendClientMetadataBuilder implements Builder<FrontendClientMetadata>, Identifiable<ClientIdentifier> {
  27     private final Map<LocalHistoryIdentifier, FrontendHistoryMetadataBuilder> currentHistories = new HashMap<>();
  28     private final RangeSet<UnsignedLong> purgedHistories;
  29     private final ClientIdentifier identifier;
  30
  31     FrontendClientMetadataBuilder(final ClientIdentifier identifier) {
  32         this.identifier = Preconditions.checkNotNull(identifier);
  33         purgedHistories = TreeRangeSet.create();
  34     }
  35
  36     FrontendClientMetadataBuilder(final FrontendClientMetadata meta) {
  37         this.identifier = Preconditions.checkNotNull(meta.getIdentifier());
  38         purgedHistories = TreeRangeSet.create(meta.getPurgedHistories());
  39
  40         for (FrontendHistoryMetadata h : meta.getCurrentHistories()) {
  41             final FrontendHistoryMetadataBuilder b = new FrontendHistoryMetadataBuilder(identifier, h);
  42             currentHistories.put(b.getIdentifier(), b);
  43         }
  44     }
  45
  46     @Override
  47     public FrontendClientMetadata build() {
  48         return new FrontendClientMetadata(identifier, purgedHistories,
  49             Collections2.transform(currentHistories.values(), FrontendHistoryMetadataBuilder::build));
  50     }
  51
  52     @Override
  53     public ClientIdentifier getIdentifier() {
  54         return identifier;
  55     }
  56
  57     void onHistoryClosed(final LocalHistoryIdentifier historyId) {
  58         ensureHistory(historyId).onHistoryClosed();
  59     }
  60
  61     void onHistoryPurged(final LocalHistoryIdentifier historyId) {
  62         currentHistories.remove(historyId);
  63         // XXX: do we need to account for cookies?
  64         purgedHistories.add(Range.singleton(UnsignedLong.fromLongBits(historyId.getHistoryId())));
  65     }
  66
  67     void onTransactionCommitted(final TransactionIdentifier txId) {
  68         ensureHistory(txId.getHistoryId()).onTransactionCommitted(txId);
  69     }
  70
  71     private FrontendHistoryMetadataBuilder ensureHistory(final LocalHistoryIdentifier historyId) {
  72         final FrontendHistoryMetadataBuilder existing = currentHistories.get(historyId);
  73         if (existing != null) {
  74             return existing;
  75         }
  76
  77         final FrontendHistoryMetadataBuilder ret = new FrontendHistoryMetadataBuilder(historyId);
  78         currentHistories.put(historyId, ret);
  79         return ret;
  80     }
  81 }