1 /*
2 Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License, version 2.0,
6 as published by the Free Software Foundation.
7
8 This program is also distributed with certain software (including
9 but not limited to OpenSSL) that is licensed under separate terms,
10 as designated in a particular file or component or in included license
11 documentation. The authors of MySQL hereby grant you an additional
12 permission to link the program and your derivative works with the
13 separately licensed software that they have included with MySQL.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License, version 2.0, for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25 #include <node.h>
26 #include <node_buffer.h>
27 #include <NdbApi.hpp>
28
29 #include "adapter_global.h"
30 #include "JsWrapper.h"
31 #include "NdbRecordObject.h"
32 #include "BlobHandler.h"
33
34
NdbRecordObject(const Record * _record,ColumnHandlerSet * _handlers,const Arguments & args)35 NdbRecordObject::NdbRecordObject(const Record *_record,
36 ColumnHandlerSet * _handlers,
37 const Arguments & args) :
38 record(_record),
39 handlers(_handlers),
40 ncol(record->getNoOfColumns()),
41 proxy(new ColumnProxy[record->getNoOfColumns()]),
42 nWrites(0),
43 isolate(args.GetIsolate())
44 {
45 EscapableHandleScope scope(isolate);
46 const Handle<Value> & jsBuffer = args[0];
47 const Handle<Value> & blobBufferArray = args[1];
48
49 unsigned int nblobs = 0;
50
51 /* Retain a handle on the buffer for our whole lifetime */
52 persistentBufferHandle.Reset(isolate, jsBuffer);
53 buffer = node::Buffer::Data(jsBuffer);
54
55 /* Initialize the list of masked-in columns */
56 resetMask();
57
58 /* Attach the column proxies to their handlers */
59 for(unsigned int i = 0 ; i < ncol ; i++)
60 proxy[i].setHandler(handlers->getHandler(i));
61
62 /* Attach BLOB buffers */
63 if(blobBufferArray->IsObject()) {
64 for(unsigned int i = 0 ; i < ncol ; i++) {
65 Handle<Value> b = blobBufferArray->ToObject()->Get(i);
66 if(b->IsObject()) {
67 nblobs++;
68 Handle<Object> buf = b->ToObject();
69 assert(node::Buffer::HasInstance(buf));
70 proxy[i].setBlobBuffer(isolate, buf);
71 record->setNotNull(i, buffer);
72 } else if(b->IsNull()) {
73 nblobs++;
74 record->setNull(i, buffer);
75 }
76 }
77 }
78 DEBUG_PRINT(" ___Constructor___ [%d col, bufsz %d, %d blobs]",
79 ncol, record->getBufferSize(), nblobs);
80 assert(nblobs == record->getNoOfBlobColumns());
81 assert(node::Buffer::Length(jsBuffer) == record->getBufferSize());
82 }
83
84
~NdbRecordObject()85 NdbRecordObject::~NdbRecordObject() {
86 DEBUG_PRINT(" << Destructor");
87 persistentBufferHandle.Reset();
88 delete[] proxy;
89 }
90
91
getField(int nField)92 Local<Value> NdbRecordObject::getField(int nField) {
93 if(record->isNull(nField, buffer))
94 return Null(isolate);
95 else
96 return proxy[nField].get(isolate, buffer);
97 }
98
99
prepare()100 Local<Value> NdbRecordObject::prepare() {
101 EscapableHandleScope scope(isolate);
102 int n = 0;
103 Local<Value> writeStatus;
104 Local<Value> savedError = Undefined(isolate);
105 for(unsigned int i = 0 ; i < ncol ; i++) {
106 if(isMaskedIn(i)) {
107 n++;
108 if(proxy[i].valueIsNull()) {
109 record->setNull(i, buffer);
110 }
111 else {
112 writeStatus = proxy[i].write(isolate, buffer);
113 if(! writeStatus->IsUndefined()) savedError = writeStatus;
114 }
115 }
116 }
117 DEBUG_PRINT("Prepared %d column%s. Mask %u.", n, (n == 1 ? "" : "s"), u.maskvalue);
118 return scope.Escape(savedError);
119 }
120
121
createBlobWriteHandles(KeyOperation & op)122 int NdbRecordObject::createBlobWriteHandles(KeyOperation & op) {
123 int ncreated = 0;
124 for(unsigned int i = 0 ; i < ncol ; i++) {
125 if(isMaskedIn(i)) {
126 BlobWriteHandler * b = proxy[i].createBlobWriteHandle(i);
127 if(b) {
128 DEBUG_PRINT(" createBlobWriteHandles -- for column %d", i);
129 op.setBlobHandler(b);
130 ncreated++;
131 }
132 }
133 }
134 return ncreated;
135 }
136