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49 lines
1.0 KiB
C++
49 lines
1.0 KiB
C++
#pragma once
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#include <Poco/Net/Socket.h>
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#include <DB/Core/Exception.h>
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#include <DB/Core/ErrorCodes.h>
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#include <DB/IO/WriteBuffer.h>
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#include <DB/IO/BufferWithOwnMemory.h>
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namespace DB
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{
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/** Работает с готовым Poco::Net::Socket. Операции блокирующие.
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*/
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class WriteBufferFromPocoSocket : public BufferWithOwnMemory<WriteBuffer>
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{
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protected:
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Poco::Net::Socket & socket;
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void nextImpl()
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{
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if (!offset())
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return;
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size_t bytes_written = 0;
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while (bytes_written != offset())
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{
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ssize_t res = socket.impl()->sendBytes(working_buffer.begin() + bytes_written, offset() - bytes_written);
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if (res < 0)
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throw Exception("Cannot write to socket", ErrorCodes::CANNOT_WRITE_TO_SOCKET);
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bytes_written += res;
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}
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}
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public:
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WriteBufferFromPocoSocket(Poco::Net::Socket & socket_, size_t buf_size = DBMS_DEFAULT_BUFFER_SIZE)
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: BufferWithOwnMemory<WriteBuffer>(buf_size), socket(socket_) {}
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~WriteBufferFromPocoSocket()
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{
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if (!std::uncaught_exception())
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next();
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}
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};
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}
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