/// <summary>
/// 队列数据 读文件
/// </summary>
/// <param name="node">消息队列节点</param>
/// <param name="config">队列数据 读取配置</param>
/// <param name="readerIndex">读文件编号</param>
internal QueueReader(QueueNode node, Config.QueueReader config, int readerIndex)
{
Writer = node.Writer;
Node = node;
this.config = config ?? defaultConfig;
this.config.Format();
this.readerIndex = readerIndex;
int isReader = 0;
++Writer.ReadCount;
writerAppendIdentity = Writer.StatePacketIndex.Identity;
try
{
if (checkStateFile())
{
stateFileStream = new FileStream(stateFileName, FileMode.Open, FileAccess.ReadWrite, FileShare.Read, 256, FileOptions.None);
stateFileStream.Seek(-stateBufferSize, SeekOrigin.End);
stateFileStream.Read(bigBuffer, 0, stateBufferSize);
fixed(byte *stateDataFixed = bigBuffer) Identity = *(ulong *)stateDataFixed;
}
else
{
stateFileStream = new FileStream(stateFileName, FileMode.CreateNew, FileAccess.Write, FileShare.Read, 256, FileOptions.None);
}
long fileIndex = 0;
if (Writer.GetIndex(Identity, ref dataFileIdentity, ref fileIndex))
{
writeIdentity = Identity;
memoryEndIdentity = Identity + config.MemoryCacheNodeCount;
messages = new MessageItem[(int)config.MemoryCacheNodeCount + QueueWriter.MaxPacketCount + 1];
if (Identity == writerAppendIdentity || loadFile(fileIndex))
{
isReader = 1;
}
}
}
finally
{
if (isReader == 0)
{
Dispose();
}
}
}
/// <summary>
/// 添加数据任务
/// </summary>
/// <param name="messageQueue">消息队列节点</param>
/// <param name="config">队列数据 读取配置</param>
/// <param name="parser"></param>
/// <param name="readerIndex">队列数据 读文件索引</param>
internal GetIdentity(MessageQueue.Node messageQueue, Config.QueueReader config, ref OperationParameter.NodeParser parser, int readerIndex) : this(messageQueue, config, ref parser)
{
ReaderIndex = readerIndex;
}
/// <summary>
/// 添加数据任务
/// </summary>
/// <param name="messageQueue">消息队列节点</param>
/// <param name="config">队列数据 读取配置</param>
/// <param name="parser"></param>
internal GetIdentity(MessageQueue.Node messageQueue, Config.QueueReader config, ref OperationParameter.NodeParser parser) : base(messageQueue)
{
Config = config;
onReturn = parser.OnReturn;
parser.OnReturn = null;
}
