opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/persisted/FrontendClientMetadata.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.persisted;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.base.MoreObjects;
  13 import com.google.common.collect.ImmutableList;
  14 import com.google.common.collect.ImmutableRangeSet;
  15 import com.google.common.collect.ImmutableRangeSet.Builder;
  16 import com.google.common.collect.Range;
  17 import com.google.common.collect.RangeSet;
  18 import com.google.common.primitives.UnsignedLong;
  19 import java.io.DataInput;
  20 import java.io.DataOutput;
  21 import java.io.IOException;
  22 import java.util.ArrayList;
  23 import java.util.Collection;
  24 import java.util.Set;
  25 import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
  26 import org.opendaylight.yangtools.concepts.Identifiable;
  27 import org.opendaylight.yangtools.concepts.WritableObject;
  28 import org.opendaylight.yangtools.concepts.WritableObjects;
  29
  30 public final class FrontendClientMetadata implements Identifiable<ClientIdentifier>, WritableObject {
  31     private final Collection<FrontendHistoryMetadata> currentHistories;
  32     private final RangeSet<UnsignedLong> purgedHistories;
  33     private final ClientIdentifier identifier;
  34
  35     public FrontendClientMetadata(final ClientIdentifier identifier, final RangeSet<UnsignedLong> purgedHistories,
  36             final Collection<FrontendHistoryMetadata> currentHistories) {
  37         this.identifier = requireNonNull(identifier);
  38         this.purgedHistories = ImmutableRangeSet.copyOf(purgedHistories);
  39         this.currentHistories = ImmutableList.copyOf(currentHistories);
  40     }
  41
  42     public Collection<FrontendHistoryMetadata> getCurrentHistories() {
  43         return currentHistories;
  44     }
  45
  46     public RangeSet<UnsignedLong> getPurgedHistories() {
  47         return purgedHistories;
  48     }
  49
  50     @Override
  51     public ClientIdentifier getIdentifier() {
  52         return identifier;
  53     }
  54
  55     @Override
  56     public void writeTo(final DataOutput out) throws IOException {
  57         identifier.writeTo(out);
  58
  59         final Set<Range<UnsignedLong>> ranges = purgedHistories.asRanges();
  60         out.writeInt(ranges.size());
  61         for (final Range<UnsignedLong> r : ranges) {
  62             WritableObjects.writeLongs(out, r.lowerEndpoint().longValue(), r.upperEndpoint().longValue());
  63         }
  64
  65         out.writeInt(currentHistories.size());
  66         for (final FrontendHistoryMetadata h : currentHistories) {
  67             h.writeTo(out);
  68         }
  69     }
  70
  71     public static FrontendClientMetadata readFrom(final DataInput in) throws IOException {
  72         final ClientIdentifier id = ClientIdentifier.readFrom(in);
  73
  74         final int purgedSize = in.readInt();
  75         final Builder<UnsignedLong> b = ImmutableRangeSet.builder();
  76         for (int i = 0; i < purgedSize; ++i) {
  77             final byte header = WritableObjects.readLongHeader(in);
  78             final UnsignedLong lower = UnsignedLong.fromLongBits(WritableObjects.readFirstLong(in, header));
  79             final UnsignedLong upper = UnsignedLong.fromLongBits(WritableObjects.readSecondLong(in, header));
  80
  81             b.add(Range.closedOpen(lower, upper));
  82         }
  83
  84         final int currentSize = in.readInt();
  85         final Collection<FrontendHistoryMetadata> currentHistories = new ArrayList<>(currentSize);
  86         for (int i = 0; i < currentSize; ++i) {
  87             currentHistories.add(FrontendHistoryMetadata.readFrom(in));
  88         }
  89
  90         return new FrontendClientMetadata(id, b.build(), currentHistories);
  91     }
  92
  93     @Override
  94     public String toString() {
  95         return MoreObjects.toStringHelper(FrontendClientMetadata.class).add("identifer", identifier)
  96                 .add("current", currentHistories).add("purged", purgedHistories).toString();
  97     }
  98 }