Exemple #1
0
        public void A_LWWDictionary_should_be_able_to_remove_entry()
        {
            var m1 = LWWDictionary.Create(
                Tuple.Create(_node1, "a", 1),
                Tuple.Create(_node2, "b", 2));
            var m2 = LWWDictionary.Create(_node2, "c", 3);

            var merged1 = m1.Merge(m2);

            var m3 = merged1.Remove(_node1, "b");

            Assert.Equal(merged1.Merge(m3).Entries, ImmutableDictionary.CreateRange(new[]
            {
                new KeyValuePair <string, int>("a", 1),
                new KeyValuePair <string, int>("c", 3)
            }));

            // but if there is a conflicting update the entry is not removed
            var m4 = merged1.SetItem(_node2, "b", 22);

            Assert.Equal(m3.Merge(m4).Entries, ImmutableDictionary.CreateRange(new[]
            {
                new KeyValuePair <string, int>("a", 1),
                new KeyValuePair <string, int>("b", 22),
                new KeyValuePair <string, int>("c", 3)
            }));
        }
Exemple #2
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        public PerformanceMonitor(TimeSpan updateInterval)
        {
            // schedule periodical updates
            this.cancelUpdates = Context.System.Scheduler.ScheduleTellRepeatedlyCancelable(updateInterval, updateInterval, Self, CollectMetrics.Instance, ActorRefs.NoSender);

            var cluster = Cluster.Get(Context.System);

            // create and start performance counters for a local node
            this.cpuCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total");
            this.memCounter = new PerformanceCounter("Memory", "Available MBytes");
            cpuCounter.NextValue();
            memCounter.NextValue();

            // assign to a distributed store of performance metrics
            var perfCounterKey = new LWWDictionaryKey <UniqueAddress, PerformanceMetrics>("perf-counters");
            var replicator     = DistributedData.DistributedData.Get(Context.System).Replicator;

            replicator.Tell(Dsl.Subscribe(perfCounterKey, Self));

            Receive <Replicator.Changed>(changed =>
            {
                lastResult = lastResult.Merge(changed.Get(perfCounterKey));
            });
            Receive <CollectMetrics>(_ =>
            {
                var cpuUsage = cpuCounter.NextValue();
                var memUsage = memCounter.NextValue();
                lastResult   = lastResult.SetItem(cluster, cluster.SelfUniqueAddress, new PerformanceMetrics(cpuUsage, memUsage));

                replicator.Tell(Dsl.Update(perfCounterKey, lastResult, WriteLocal.Instance, null, map => lastResult.Merge(map)));
            });
        }
Exemple #3
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        public void A_LWWDictionary_should_be_able_to_set_entries()
        {
            var m = LWWDictionary.Create(
                Tuple.Create(_node1, "a", 1),
                Tuple.Create(_node2, "b", 2));

            Assert.Equal(m.Entries, ImmutableDictionary.CreateRange(new[]
            {
                new KeyValuePair <string, int>("a", 1),
                new KeyValuePair <string, int>("b", 2)
            }));
        }
Exemple #4
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        /// <summary>
        /// TBD
        /// </summary>
        /// <param name="other">TBD</param>
        /// <returns>TBD</returns>
        public bool Equals(LWWDictionary <TKey, TValue> other)
        {
            if (ReferenceEquals(other, null))
            {
                return(false);
            }
            if (ReferenceEquals(this, other))
            {
                return(true);
            }

            return(Underlying.Equals(other.Underlying));
        }
Exemple #5
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        protected Update CreateUpdateStateCompletedCommand(string innerKey, IWriteConsistency writeConsistency = null)
        {
            return(Dsl.Update(
                       key: new LWWDictionaryKey <string, DeduplicationState>(
                           _receiver.ReplicatorKey),
                       initial: LWWDictionary.Create(node: _receiver.SelfUniqueAddress,
                                                     key: innerKey,
                                                     value: new DeduplicationState()
            {
                NumberAttempts = 0,
                ProcessingState =
                    DeduplicationProcessingState.Processed,
                PruneAfter =
                    _receiver.PruningConfiguration
                    .PruneAttemptedAfter != null
                                ? DateTime.UtcNow + _receiver
                    .PruningConfiguration.PruneAttemptedAfter
                                : null
            })
                       , consistency: writeConsistency,
                       modify: dds =>
            {
                if (dds.TryGetValue(innerKey, out DeduplicationState state))
                {
                    state.ProcessingState =
                        DeduplicationProcessingState.Processed;
                    state.PruneAfter =
                        DateTime.UtcNow + _receiver
                        .PruningConfiguration.PruneCompletedAfter;

                    return dds.SetItem(_receiver.SelfUniqueAddress,
                                       innerKey, state);
                }
                else
                {
                    return dds.SetItem(_receiver.SelfUniqueAddress,
                                       innerKey,
                                       new DeduplicationState()
                    {
                        NumberAttempts = 0,
                        ProcessingState = DeduplicationProcessingState
                                          .Processed,
                        PruneAfter = DateTime.UtcNow + _receiver
                                     .PruningConfiguration
                                     .PruneCompletedAfter
                    });
                }
            }));
        }
Exemple #6
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        public void A_LWWDictionary_should_be_able_to_have_its_entries_correctly_merged_with_another_LWWMap_with_other_entries()
        {
            var m1 = LWWDictionary.Create(
                Tuple.Create(_node1, "a", 1),
                Tuple.Create(_node1, "b", 2));
            var m2 = LWWDictionary.Create(_node2, "c", 3);

            var expected = ImmutableDictionary.CreateRange(new[]
            {
                new KeyValuePair <string, int>("a", 1),
                new KeyValuePair <string, int>("b", 2),
                new KeyValuePair <string, int>("c", 3),
            });

            // merge both ways
            Assert.Equal(expected, m1.Merge(m2).Entries);
            Assert.Equal(expected, m2.Merge(m1).Entries);
        }
Exemple #7
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 /// <summary>
 /// TBD
 /// </summary>
 /// <param name="other">TBD</param>
 /// <returns>TBD</returns>
 public LWWDictionary <TKey, TValue> Merge(LWWDictionary <TKey, TValue> other) =>
 new LWWDictionary <TKey, TValue>(Underlying.Merge(other.Underlying));
Exemple #8
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 protected Update CreateAdvanceAndGetStateCommand(string innerKey, IWriteConsistency writeConsistency)
 {
     return(Dsl.Update(
                key: new LWWDictionaryKey <string, DeduplicationState>(
                    _receiver.ReplicatorKey),
                initial: LWWDictionary.Create(node: _receiver.SelfUniqueAddress,
                                              key: innerKey,
                                              value: new DeduplicationState()
     {
         NumberAttempts = 0,
         ProcessingState =
             DeduplicationProcessingState.NotAttempted,
         PruneAfter = _receiver.PruningConfiguration
                      .PruneNotAttemptedAfter != null
                     ? DateTime.UtcNow + _receiver
                      .PruningConfiguration.PruneNotAttemptedAfter
                     : (DateTime?)null
     }
                                              )
                , consistency: writeConsistency,
                modify: dds =>
     {
         if (dds.TryGetValue(innerKey, out DeduplicationState state))
         {
             if (state.ProcessingState ==
                 DeduplicationProcessingState.Error ||
                 state.ProcessingState ==
                 DeduplicationProcessingState.Processed)
             {
                 return dds;
             }
             else if (state.NumberAttempts < _receiver.MaxAttempts)
             {
                 state.NumberAttempts = state.NumberAttempts + 1;
                 state.ProcessingState = DeduplicationProcessingState
                                         .Attempted;
                 state.PruneAfter = _receiver.PruningConfiguration
                                    .PruneAttemptedAfter != null
                         ? DateTime.UtcNow + _receiver
                                    .PruningConfiguration.PruneAttemptedAfter
                         : (DateTime?)null;
                 return dds.SetItem(_receiver.SelfUniqueAddress, innerKey, state);
             }
             else
             {
                 state.ProcessingState =
                     DeduplicationProcessingState.Error;
                 state.PruneAfter =
                     DateTime.UtcNow + _receiver
                     .PruningConfiguration.PruneErroredAfter;
                 return dds.SetItem(_receiver.SelfUniqueAddress,
                                    innerKey, state);
             }
         }
         else
         {
             return dds.SetItem(_receiver.SelfUniqueAddress, innerKey,
                                new DeduplicationState()
             {
                 NumberAttempts = 0,
                 ProcessingState = DeduplicationProcessingState
                                   .NotAttempted,
                 PruneAfter = _receiver.PruningConfiguration
                              .PruneNotAttemptedAfter != null
                             ? DateTime.UtcNow + _receiver
                              .PruningConfiguration.PruneNotAttemptedAfter
                             : (DateTime?)null
             });
         }
     }));
 }
Exemple #9
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 /// <summary>
 /// TBD
 /// </summary>
 /// <param name="cluster">TBD</param>
 /// <param name="crdt">TBD</param>
 public LocalLWWDictionary(Cluster.Cluster cluster, LWWDictionary <TKey, TVal> crdt) : this(cluster.SelfUniqueAddress, crdt)
 {
 }
Exemple #10
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 /// <summary>
 /// TBD
 /// </summary>
 /// <param name="currentNode">TBD</param>
 /// <param name="crdt">TBD</param>
 internal LocalLWWDictionary(UniqueAddress currentNode, LWWDictionary <TKey, TVal> crdt) : this()
 {
     _currentNode = currentNode;
     _crdt        = crdt;
 }
Exemple #11
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 /// <summary>
 /// TBD
 /// </summary>
 /// <param name="dictionary">TBD</param>
 public Surrogate(LWWDictionary <TKey, TVal> dictionary)
 {
     _dictionary = dictionary;
 }
Exemple #12
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 /// <summary>
 /// Merges data from provided <see cref="LWWDictionary{TKey,TValue}"/> into current CRDT,
 /// creating new immutable instance in a result.
 /// </summary>
 /// <param name="dictionary">TBD</param>
 /// <returns>TBD</returns>
 public LocalLWWDictionary <TKey, TVal> Merge(LWWDictionary <TKey, TVal> dictionary) =>
 new LocalLWWDictionary <TKey, TVal>(_currentNode, _crdt.Merge(dictionary));
 /// <summary>
 /// Creates an instance of an LWWDictionary scoped to a current cluster.
 /// </summary>
 /// <typeparam name="TKey">TBD</typeparam>
 /// <typeparam name="TVal">TBD</typeparam>
 /// <param name="cluster">TBD</param>
 /// <param name="dictionary">TBD</param>
 /// <returns>TBD</returns>
 public static LocalLWWDictionary <TKey, TVal> LWWDictionary <TKey, TVal>(this Cluster.Cluster cluster, LWWDictionary <TKey, TVal> dictionary) =>
 new LocalLWWDictionary <TKey, TVal>(cluster, dictionary);