opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/persisted/FrontendHistoryMetadata.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.Verify;
  12 import com.google.common.collect.ImmutableMap;
  13 import com.google.common.collect.ImmutableRangeSet;
  14 import com.google.common.collect.Range;
  15 import com.google.common.collect.RangeSet;
  16 import com.google.common.collect.TreeRangeSet;
  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.HashMap;
  22 import java.util.Map;
  23 import java.util.Map.Entry;
  24 import java.util.Set;
  25 import org.eclipse.jdt.annotation.NonNull;
  26 import org.opendaylight.yangtools.concepts.WritableObject;
  27 import org.opendaylight.yangtools.concepts.WritableObjects;
  28
  29 public final class FrontendHistoryMetadata implements WritableObject {
  30     private final @NonNull ImmutableRangeSet<UnsignedLong> purgedTransactions;
  31     private final @NonNull ImmutableMap<UnsignedLong, Boolean> closedTransactions;
  32     private final long historyId;
  33     private final long cookie;
  34     private final boolean closed;
  35
  36     public FrontendHistoryMetadata(final long historyId, final long cookie, final boolean closed,
  37             final Map<UnsignedLong, Boolean> closedTransactions, final RangeSet<UnsignedLong> purgedTransactions) {
  38         this.historyId = historyId;
  39         this.cookie = cookie;
  40         this.closed = closed;
  41         this.closedTransactions = ImmutableMap.copyOf(closedTransactions);
  42         this.purgedTransactions = ImmutableRangeSet.copyOf(purgedTransactions);
  43     }
  44
  45     public long getHistoryId() {
  46         return historyId;
  47     }
  48
  49     public long getCookie() {
  50         return cookie;
  51     }
  52
  53     public boolean isClosed() {
  54         return closed;
  55     }
  56
  57     public Map<UnsignedLong, Boolean> getClosedTransactions() {
  58         return closedTransactions;
  59     }
  60
  61     public RangeSet<UnsignedLong> getPurgedTransactions() {
  62         return purgedTransactions;
  63     }
  64
  65     @Override
  66     public void writeTo(final DataOutput out) throws IOException {
  67         WritableObjects.writeLongs(out, historyId, cookie);
  68         out.writeBoolean(closed);
  69
  70         final Set<Range<UnsignedLong>> purgedRanges = purgedTransactions.asRanges();
  71         WritableObjects.writeLongs(out, closedTransactions.size(), purgedRanges.size());
  72         for (Entry<UnsignedLong, Boolean> e : closedTransactions.entrySet()) {
  73             WritableObjects.writeLong(out, e.getKey().longValue());
  74             out.writeBoolean(e.getValue());
  75         }
  76         for (Range<UnsignedLong> r : purgedRanges) {
  77             WritableObjects.writeLongs(out, r.lowerEndpoint().longValue(), r.upperEndpoint().longValue());
  78         }
  79     }
  80
  81     public static FrontendHistoryMetadata readFrom(final DataInput in) throws IOException {
  82         byte header = WritableObjects.readLongHeader(in);
  83         final long historyId = WritableObjects.readFirstLong(in, header);
  84         final long cookie = WritableObjects.readSecondLong(in, header);
  85         final boolean closed = in.readBoolean();
  86
  87         header = WritableObjects.readLongHeader(in);
  88         long ls = WritableObjects.readFirstLong(in, header);
  89         Verify.verify(ls >= 0 && ls <= Integer.MAX_VALUE);
  90         final int csize = (int) ls;
  91
  92         ls = WritableObjects.readSecondLong(in, header);
  93         Verify.verify(ls >= 0 && ls <= Integer.MAX_VALUE);
  94         final int psize = (int) ls;
  95
  96         final Map<UnsignedLong, Boolean> closedTransactions = new HashMap<>(csize);
  97         for (int i = 0; i < csize; ++i) {
  98             final UnsignedLong key = UnsignedLong.fromLongBits(WritableObjects.readLong(in));
  99             final Boolean value = in.readBoolean();
 100             closedTransactions.put(key, value);
 101         }
 102         final RangeSet<UnsignedLong> purgedTransactions = TreeRangeSet.create();
 103         for (int i = 0; i < psize; ++i) {
 104             final byte h = WritableObjects.readLongHeader(in);
 105             final UnsignedLong l = UnsignedLong.fromLongBits(WritableObjects.readFirstLong(in, h));
 106             final UnsignedLong u = UnsignedLong.fromLongBits(WritableObjects.readSecondLong(in, h));
 107             purgedTransactions.add(Range.closedOpen(l, u));
 108         }
 109
 110         return new FrontendHistoryMetadata(historyId, cookie, closed, closedTransactions, purgedTransactions);
 111     }
 112
 113     @Override
 114     public String toString() {
 115         return MoreObjects.toStringHelper(FrontendHistoryMetadata.class).add("historyId", historyId)
 116                 .add("cookie", cookie).add("closed", closed).add("closedTransactions", closedTransactions)
 117                 .add("purgedTransactions", purgedTransactions).toString();
 118     }
 119 }