WritesDone是gRPC C++库中的一个类,用于在异步服务器中标识完成写操作。它主要用于区分gRPC请求的完成状态和断开的连接。
在gRPC中,服务器通过异步处理来处理客户端的请求。当服务器接收到一个请求时,它会启动一个异步操作来处理该请求,并在操作完成后通知客户端。WritesDone类用于在异步操作完成时通知服务器。
区分gRPC请求的完成状态和断开的连接非常重要。当客户端断开连接时,服务器需要知道是因为请求已完成还是客户端主动断开了连接。WritesDone类提供了一种机制,使服务器能够区分这两种情况。
WritesDone类的使用方法如下:
- 在服务器的异步处理函数中,创建一个WritesDone对象。
- 在异步操作完成时,调用WritesDone对象的NotifyOnCancel()方法。
- 在异步操作完成后,通过WritesDone对象的IsCancelled()方法来判断操作是否被取消。
如果IsCancelled()方法返回true,表示操作被取消,即客户端断开了连接。如果返回false,表示操作完成,即请求已完成。
WritesDone类的使用示例代码如下:
void AsyncProcessRequest(ServerContext* context, RequestType* request,
grpc::ServerAsyncResponseWriter<ResponseType>* responder,
grpc::CompletionQueue* cq, void* tag) {
// 处理请求的异步操作
// 创建WritesDone对象
grpc::ServerContext::WritesDone writes_done(context);
// 在异步操作完成时通知服务器
writes_done.NotifyOnCancel(cq, tag);
// 异步操作的其他处理
// 异步操作完成后判断是否被取消
if (writes_done.IsCancelled()) {
// 客户端断开了连接
} else {
// 请求已完成
}
}
推荐的腾讯云相关产品和产品介绍链接地址:
- 腾讯云产品:云服务器(https://cloud.tencent.com/product/cvm)
- 腾讯云产品:云原生容器服务(https://cloud.tencent.com/product/tke)
- 腾讯云产品:人工智能(https://cloud.tencent.com/product/ai)
- 腾讯云产品:物联网(https://cloud.tencent.com/product/iotexplorer)
- 腾讯云产品:移动开发(https://cloud.tencent.com/product/mobile)
- 腾讯云产品:云数据库(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:区块链(https://cloud.tencent.com/product/baas)
- 腾讯云产品:对象存储(https://cloud.tencent.com/product/cos)
- 腾讯云产品:音视频处理(https://cloud.tencent.com/product/mps)
- 腾讯云产品:网络安全(https://cloud.tencent.com/product/saf)
- 腾讯云产品:CDN加速(https://cloud.tencent.com/product/cdn)
- 腾讯云产品:云监控(https://cloud.tencent.com/product/monitor)
- 腾讯云产品:云函数(https://cloud.tencent.com/product/scf)
- 腾讯云产品:云存储(https://cloud.tencent.com/product/cos)
- 腾讯云产品:云原生应用引擎(https://cloud.tencent.com/product/tke)
- 腾讯云产品:云原生数据库TDSQL(https://cloud.tencent.com/product/tdsql)
- 腾讯云产品:云原生数据库TBase(https://cloud.tencent.com/product/tbase)
- 腾讯云产品:云原生数据库TcaplusDB(https://cloud.tencent.com/product/tcaplusdb)
- 腾讯云产品:云原生数据库TRedis(https://cloud.tencent.com/product/tredis)
- 腾讯云产品:云原生数据库TencentDB for MySQL(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for PostgreSQL(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for MariaDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for MongoDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for Redis(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for TcaplusDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for InfluxDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for CynosDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for Aurora(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for Elasticsearch(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for ClickHouse(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for MySQL(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for PostgreSQL(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for MariaDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Redis(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for TcaplusDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for InfluxDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for CynosDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Aurora(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Elasticsearch(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for ClickHouse(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for MySQL(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for PostgreSQL(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for MariaDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Redis(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for TcaplusDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for InfluxDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for CynosDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Aurora(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Elasticsearch(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for ClickHouse(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for MySQL(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for PostgreSQL(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for MariaDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Redis(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for TcaplusDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for InfluxDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for CynosDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Aurora(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Elasticsearch(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for ClickHouse(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for MySQL(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for PostgreSQL(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for MariaDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Redis(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for TcaplusDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for InfluxDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for CynosDB(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Aurora(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for Elasticsearch(https://cloud.tencent.com/product/cdb)
- 腾讯云产品:云原生数据库TencentDB for HybridDB for ClickHouse(https://cloud.tencent.com/product/cdb)