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