mirror of https://github.com/BOINC/boinc.git
92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
// The contents of this file are subject to the BOINC Public License
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// Version 1.0 (the "License"); you may not use this file except in
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// compliance with the License. You may obtain a copy of the License at
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// http://boinc.berkeley.edu/license_1.0.txt
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//
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// Software distributed under the License is distributed on an "AS IS"
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// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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// License for the specific language governing rights and limitations
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// under the License.
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//
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// The Original Code is the Berkeley Open Infrastructure for Network Computing.
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//
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// The Initial Developer of the Original Code is the SETI@home project.
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// Portions created by the SETI@home project are Copyright (C) 2002
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// University of California at Berkeley. All Rights Reserved.
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//
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// Contributor(s):
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//
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#ifndef _PERS_FILE_XFER_H
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#define _PERS_FILE_XFER_H
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#ifndef _WIN32
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#include <time.h>
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#endif
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#include "client_types.h"
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#include "file_xfer.h"
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// PERS_FILE_XFER represents a persistent file transfer.
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// A set of URL is given in the FILE_INFO.
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// For download, the object attempts to download the file
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// from any of the URLs.
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// If one fails or is not available, try another,
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// using an exponential backoff policy to avoid flooding servers.
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// For upload, try to upload the file to the first URL;
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// if that gets transient failure, try the others.
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// Default values for exponential backoff
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#define PERS_RETRY_DELAY_MIN 60 // 1 minute
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#define PERS_RETRY_DELAY_MAX (60*60*4) // 4 hours
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#define PERS_GIVEUP (60*60*24*7*2) // 2 weeks
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// give up on xfer if this time elapses since last byte xferred
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class PERS_FILE_XFER {
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int nretry; // # of retries so far
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int first_request_time; // UNIX time of first file request
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bool is_upload;
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public:
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int next_request_time; // UNIX time to next retry the file request
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double time_so_far;
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// Total time there's been an active FILE_XFER for this PFX
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// Currently not used for anything; not meaningful for throughput
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// because could include repeated transfer
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double last_time;
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// when the above was last updated.
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// Defined only while a transfer is active
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bool xfer_done;
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FILE_XFER* fxp; // nonzero if file xfer in progress
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FILE_INFO* fip;
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PERS_FILE_XFER();
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~PERS_FILE_XFER();
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int init(FILE_INFO*, bool is_file_upload);
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bool poll(time_t now);
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void handle_xfer_failure();
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void retry_or_backoff();
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void giveup();
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int write(FILE* fout);
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int parse(FILE* fin);
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int start_xfer();
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void suspend();
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};
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class PERS_FILE_XFER_SET {
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FILE_XFER_SET* file_xfers;
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public:
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vector<PERS_FILE_XFER*>pers_file_xfers;
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PERS_FILE_XFER_SET(FILE_XFER_SET*);
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int insert(PERS_FILE_XFER*);
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int remove(PERS_FILE_XFER*);
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bool poll();
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void suspend();
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};
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#endif
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