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.eclipse.jdt.annotation.NonNull;
  26 import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
  27 import org.opendaylight.yangtools.concepts.Identifiable;
  28 import org.opendaylight.yangtools.concepts.WritableObject;
  29 import org.opendaylight.yangtools.concepts.WritableObjects;
  30
  31 public final class FrontendClientMetadata implements Identifiable<ClientIdentifier>, WritableObject {
  32     private final @NonNull ImmutableList<FrontendHistoryMetadata> currentHistories;
  33     private final @NonNull ImmutableRangeSet<UnsignedLong> purgedHistories;
  34     private final @NonNull ClientIdentifier identifier;
  35
  36     public FrontendClientMetadata(final ClientIdentifier identifier, final RangeSet<UnsignedLong> purgedHistories,
  37             final Collection<FrontendHistoryMetadata> currentHistories) {
  38         this.identifier = requireNonNull(identifier);
  39         this.purgedHistories = ImmutableRangeSet.copyOf(purgedHistories);
  40         this.currentHistories = ImmutableList.copyOf(currentHistories);
  41     }
  42
  43     public Collection<FrontendHistoryMetadata> getCurrentHistories() {
  44         return currentHistories;
  45     }
  46
  47     public RangeSet<UnsignedLong> getPurgedHistories() {
  48         return purgedHistories;
  49     }
  50
  51     @Override
  52     public ClientIdentifier getIdentifier() {
  53         return identifier;
  54     }
  55
  56     @Override
  57     public void writeTo(final DataOutput out) throws IOException {
  58         identifier.writeTo(out);
  59
  60         final Set<Range<UnsignedLong>> ranges = purgedHistories.asRanges();
  61         out.writeInt(ranges.size());
  62         for (final Range<UnsignedLong> r : ranges) {
  63             WritableObjects.writeLongs(out, r.lowerEndpoint().longValue(), r.upperEndpoint().longValue());
  64         }
  65
  66         out.writeInt(currentHistories.size());
  67         for (final FrontendHistoryMetadata h : currentHistories) {
  68             h.writeTo(out);
  69         }
  70     }
  71
  72     public static FrontendClientMetadata readFrom(final DataInput in) throws IOException {
  73         final ClientIdentifier id = ClientIdentifier.readFrom(in);
  74
  75         final int purgedSize = in.readInt();
  76         final Builder<UnsignedLong> b = ImmutableRangeSet.builder();
  77         for (int i = 0; i < purgedSize; ++i) {
  78             final byte header = WritableObjects.readLongHeader(in);
  79             final UnsignedLong lower = UnsignedLong.fromLongBits(WritableObjects.readFirstLong(in, header));
  80             final UnsignedLong upper = UnsignedLong.fromLongBits(WritableObjects.readSecondLong(in, header));
  81
  82             b.add(Range.closedOpen(lower, upper));
  83         }
  84
  85         final int currentSize = in.readInt();
  86         final Collection<FrontendHistoryMetadata> currentHistories = new ArrayList<>(currentSize);
  87         for (int i = 0; i < currentSize; ++i) {
  88             currentHistories.add(FrontendHistoryMetadata.readFrom(in));
  89         }
  90
  91         return new FrontendClientMetadata(id, b.build(), currentHistories);
  92     }
  93
  94     @Override
  95     public String toString() {
  96         return MoreObjects.toStringHelper(FrontendClientMetadata.class).add("identifer", identifier)
  97                 .add("current", currentHistories).add("purged", purgedHistories).toString();
  98     }
  99 }