131 lines
3.9 KiB
C++
131 lines
3.9 KiB
C++
/*
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Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef OUTPUT_STREAM_HPP
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#define OUTPUT_STREAM_HPP
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#include <ndb_global.h>
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#include <NdbTCP.h>
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/**
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* Output stream
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*/
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class OutputStream {
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public:
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OutputStream() {}
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virtual ~OutputStream() {}
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virtual int print(const char * fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 3) = 0;
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virtual int println(const char * fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 3) = 0;
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virtual int write(const void * buf, size_t len) = 0;
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virtual void flush() {}
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virtual void reset_timeout() {}
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};
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/**
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* Strings going to BufferedOutputStream are appended to
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* a LogBuffer object which are later retrieved by a log
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* thread and written to the log file.
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*/
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class BufferedOutputStream : public OutputStream {
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public:
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BufferedOutputStream(class LogBuffer* plogBuf);
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virtual ~BufferedOutputStream() {}
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int print(const char * fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 3);
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int println(const char * fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 3);
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int write(const void * buf, size_t len);
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void flush() {}
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private:
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class LogBuffer* logBuf;
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};
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class FileOutputStream : public OutputStream {
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FILE * f;
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public:
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FileOutputStream(FILE * file = stdout);
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virtual ~FileOutputStream() {}
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FILE *getFile() { return f; }
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int print(const char * fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 3);
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int println(const char * fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 3);
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int write(const void * buf, size_t len);
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void flush() { fflush(f); }
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};
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class SocketOutputStream : public OutputStream {
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protected:
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NDB_SOCKET_TYPE m_socket;
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unsigned m_timeout_ms;
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bool m_timedout;
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unsigned m_timeout_remain;
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public:
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SocketOutputStream(NDB_SOCKET_TYPE socket, unsigned write_timeout_ms = 1000);
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virtual ~SocketOutputStream() {}
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bool timedout() { return m_timedout; }
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void reset_timeout() { m_timedout= false; m_timeout_remain= m_timeout_ms;}
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int print(const char * fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 3);
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int println(const char * fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 3);
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int write(const void * buf, size_t len);
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};
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class BufferedSockOutputStream : public SocketOutputStream {
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class UtilBuffer& m_buffer;
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public:
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BufferedSockOutputStream(NDB_SOCKET_TYPE socket,
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unsigned write_timeout_ms = 1000);
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virtual ~BufferedSockOutputStream();
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int print(const char * fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 3);
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int println(const char * fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 3);
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int write(const void * buf, size_t len);
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void flush();
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};
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class NullOutputStream : public OutputStream {
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public:
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NullOutputStream() {}
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virtual ~NullOutputStream() {}
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int print(const char * /* unused */, ...) { return 1;}
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int println(const char * /* unused */, ...) { return 1;}
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int write(const void * buf, size_t len) { return 1;}
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};
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#endif
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