| /* |
| * 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.Events |
| { |
| using System; |
| using System.ComponentModel; |
| using System.Diagnostics; |
| using Apache.Ignite.Core.Binary; |
| |
| /// <summary> |
| /// In-memory event storage. |
| /// </summary> |
| public class MemoryEventStorageSpi : IEventStorageSpi |
| { |
| /// <summary> |
| /// Default event count limit. |
| /// </summary> |
| public const long DefaultMaxEventCount = 10000; |
| |
| /// <summary> |
| /// The default expiration timeout. |
| /// </summary> |
| public static readonly TimeSpan DefaultExpirationTimeout = TimeSpan.FromSeconds(-1); |
| |
| /// <summary> |
| /// Gets or sets the expiration timeout for stored events. |
| /// Negative value means no expiration. |
| /// Defaults to -1 second. |
| /// </summary> |
| [DefaultValue(typeof(TimeSpan), "-0:0:1")] |
| public TimeSpan ExpirationTimeout { get; set; } |
| |
| /// <summary> |
| /// Gets or sets the maximum event count to store. When this limit is reached, older events are removed. |
| /// Defaults to <see cref="DefaultMaxEventCount"/>. |
| /// </summary> |
| [DefaultValue(DefaultMaxEventCount)] |
| public long MaxEventCount { get; set; } |
| |
| /// <summary> |
| /// Initializes a new instance of the <see cref="MemoryEventStorageSpi"/> class. |
| /// </summary> |
| public MemoryEventStorageSpi() |
| { |
| ExpirationTimeout = DefaultExpirationTimeout; |
| MaxEventCount = DefaultMaxEventCount; |
| } |
| |
| /// <summary> |
| /// Reads instance. |
| /// </summary> |
| internal static MemoryEventStorageSpi Read(IBinaryRawReader reader) |
| { |
| Debug.Assert(reader != null); |
| |
| var eventCount = reader.ReadLong(); |
| var timeout = reader.ReadLong(); |
| |
| return new MemoryEventStorageSpi |
| { |
| MaxEventCount = eventCount, |
| ExpirationTimeout = timeout < 0 || timeout > TimeSpan.MaxValue.TotalMilliseconds |
| ? DefaultExpirationTimeout |
| : TimeSpan.FromMilliseconds(timeout) |
| }; |
| } |
| |
| /// <summary> |
| /// Writes this instance. |
| /// </summary> |
| internal void Write(IBinaryRawWriter writer) |
| { |
| writer.WriteLong(MaxEventCount); |
| |
| if (ExpirationTimeout == TimeSpan.MaxValue || ExpirationTimeout < TimeSpan.Zero) |
| { |
| writer.WriteLong(long.MaxValue); |
| } |
| else |
| { |
| writer.WriteLong((long) ExpirationTimeout.TotalMilliseconds); |
| } |
| } |
| } |
| } |