1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2009 Sun Microsystems
*
* Authors:
*
* Jay Pipes <joinfu@sun.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
*
* Implements the HEXDUMP_TRANSACTION_MESSAGE(filename, offset) UDF.
*/
#include "config.h"
#include <drizzled/plugin/function.h>
#include <drizzled/item/func.h>
#include <drizzled/function/str/strfunc.h>
#include <drizzled/error.h>
#include <drizzled/algorithm/crc32.h>
#include "drizzled/internal/my_sys.h"
#include "drizzled/charset.h"
#include <fcntl.h>
#include "transaction_log.h"
#include "hexdump_transaction_message.h"
#include <drizzled/message/transaction.pb.h>
#include <drizzled/util/convert.h>
#include <google/protobuf/io/zero_copy_stream.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
#include <google/protobuf/io/coded_stream.h>
#include <google/protobuf/text_format.h>
using namespace std;
using namespace drizzled;
using namespace google;
/** Defined in transaction_log.cc */
extern TransactionLog *transaction_log;
plugin::Create_function<HexdumpTransactionMessageFunction> *hexdump_transaction_message_func_factory= NULL;
void HexdumpTransactionMessageFunction::fix_length_and_dec()
{
max_length= 2 * 1024 * 1024; /* 2MB size limit seems ok... */
args[0]->collation.set(
get_charset_by_csname(args[0]->collation.collation->csname,
MY_CS_BINSORT), DERIVATION_COERCIBLE);
}
String *HexdumpTransactionMessageFunction::val_str(String *str)
{
assert(fixed == true);
String *filename_arg= args[0]->val_str(str);
off_t offset_arg= static_cast<int64_t>(args[1]->val_int());
if (filename_arg == NULL || args[1]->null_value == true)
{
my_error(ER_INVALID_NULL_ARGUMENT, MYF(0), func_name());
null_value= true;
return NULL;
}
if (transaction_log == NULL)
{
my_error(ER_INVALID_NULL_ARGUMENT, MYF(0), func_name());
null_value= true;
return NULL;
}
null_value= false;
message::Transaction transaction_message;
/**
* @todo Of course, this is not efficient to create a
* new input stream every time we call the UDF. Create
* a pool of TransactionLogReader objects that can be
* re-used.
*/
const string &filename= transaction_log->getLogFilename();
int log_file= open(filename.c_str(), O_RDONLY);
if (log_file == -1)
{
errmsg_printf(ERRMSG_LVL_ERROR, _("Failed to open transaction log file %s. Got error: %s\n"),
filename.c_str(),
strerror(errno));
null_value= true;
return NULL;
}
(void) lseek(log_file, offset_arg, SEEK_SET);
protobuf::io::FileInputStream *file_input= new protobuf::io::FileInputStream(log_file);
file_input->SetCloseOnDelete(true);
protobuf::io::CodedInputStream *coded_input= new protobuf::io::CodedInputStream(file_input);
/* Grab our message type and length */
uint32_t message_type;
if (! coded_input->ReadLittleEndian32(&message_type))
{
delete file_input;
/** @todo Error message for this... */
null_value= true;
return NULL;
}
uint32_t message_size;
if (! coded_input->ReadLittleEndian32(&message_size))
{
delete file_input;
/** @todo Error message for this... */
null_value= true;
return NULL;
}
uint8_t *buffer= (uint8_t *) malloc(message_size);
bool result= coded_input->ReadRaw(buffer, message_size);
if (result == false)
{
fprintf(stderr, _("Could not read transaction message.\n"));
fprintf(stderr, _("GPB ERROR: %s.\n"), strerror(errno));
fprintf(stderr, _("Raw buffer read: %s.\n"), buffer);
}
/*
* Convert raw bytes to a hex representation and store back into
* the return String.
*/
string hexdump;
hexdump.reserve(message_size * 4);
bytesToHexdumpFormat(hexdump, reinterpret_cast<const unsigned char *>(buffer), message_size);
/*
* Check that the transaction message is actually not corrupt before
* printing out the raw byte representation of the transaction message...
*/
result= transaction_message.ParseFromArray(buffer, static_cast<int32_t>(message_size));
if (result == false)
{
fprintf(stderr, _("Unable to parse transaction. Got error: %s.\n"), transaction_message.InitializationErrorString().c_str());
if (buffer != NULL)
fprintf(stderr, _("BUFFER: %s\n"), buffer);
}
if (str->alloc(message_size * 4)) /* Hex representation is ~4 times number of bytes */
{
null_value= true;
return NULL;
}
strncpy(str->ptr(), hexdump.c_str(), hexdump.length());
str->length(hexdump.length());
free(buffer);
delete coded_input;
delete file_input;
return str;
}
|