| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| namespace Apache.Ignite.Core.Datastream |
| { |
| using System.Collections.Generic; |
| using System.Diagnostics.CodeAnalysis; |
| using Apache.Ignite.Core.Binary; |
| using Apache.Ignite.Core.Cache; |
| using Apache.Ignite.Core.Impl.Binary; |
| using Apache.Ignite.Core.Impl.Common; |
| using Apache.Ignite.Core.Impl.Datastream; |
| |
| /// <summary> |
| /// Convenience adapter to transform update existing values in streaming cache |
| /// based on the previously cached value. |
| /// </summary> |
| /// <typeparam name="TK">Key type.</typeparam> |
| /// <typeparam name="TV">Value type.</typeparam> |
| /// <typeparam name="TArg">The type of the processor argument.</typeparam> |
| /// <typeparam name="TRes">The type of the processor result.</typeparam> |
| public sealed class StreamTransformer<TK, TV, TArg, TRes> : IStreamReceiver<TK, TV>, |
| IBinaryWriteAware |
| { |
| /** Entry processor. */ |
| private readonly ICacheEntryProcessor<TK, TV, TArg, TRes> _proc; |
| |
| /// <summary> |
| /// Initializes a new instance of the <see cref="StreamTransformer{K, V, A, R}"/> class. |
| /// </summary> |
| /// <param name="proc">Entry processor.</param> |
| public StreamTransformer(ICacheEntryProcessor<TK, TV, TArg, TRes> proc) |
| { |
| IgniteArgumentCheck.NotNull(proc, "proc"); |
| |
| _proc = proc; |
| } |
| |
| /// <summary> |
| /// Updates cache with batch of entries. |
| /// </summary> |
| /// <param name="cache">Cache.</param> |
| /// <param name="entries">Entries.</param> |
| [SuppressMessage("Microsoft.Design", "CA1062:Validate arguments of public methods")] |
| public void Receive(ICache<TK, TV> cache, ICollection<ICacheEntry<TK, TV>> entries) |
| { |
| // Don't use InvokeAll because semantics is different, e.g. duplicate keys are ignored. |
| foreach (var entry in entries) |
| cache.Invoke(entry.Key, _proc, default(TArg)); |
| } |
| |
| /** <inheritdoc /> */ |
| void IBinaryWriteAware.WriteBinary(IBinaryWriter writer) |
| { |
| var w = (BinaryWriter)writer; |
| |
| w.WriteByte(StreamReceiverHolder.RcvTransformer); |
| |
| w.WriteObject(_proc); |
| } |
| } |
| } |