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
|
//-----------------------------------------------------------------------------
// Copyright (c) 2016, 2022, Oracle and/or its affiliates.
//
// This software is dual-licensed to you under the Universal Permissive License
// (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
// 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
// either license.
//
// If you elect to accept the software under the Apache License, Version 2.0,
// the following applies:
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// DemoObjectAQ.c
// Demos simple enqueuing and dequeuing objects using advanced queuing.
//-----------------------------------------------------------------------------
#include "SampleLib.h"
#define QUEUE_NAME "DEMO_BOOK_QUEUE"
#define QUEUE_OBJECT_TYPE "UDT_BOOK"
#define NUM_BOOKS 2
#define NUM_ATTRS 3
struct bookType {
char *title;
char *authors;
double price;
};
struct bookType books[NUM_BOOKS] = {
{ "Oracle Call Interface Programmers Guide", "Oracle", 0 },
{ "Selecting Employees", "Scott Tiger", 7.99 }
};
//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
dpiObjectAttr *attrs[NUM_ATTRS];
dpiDeqOptions *deqOptions;
dpiObjectType *objType;
dpiMsgProps *msgProps;
dpiData attrValue;
dpiQueue *queue;
dpiObject *book;
dpiConn *conn;
uint32_t i;
// connect to database
conn = dpiSamples_getConn(0, NULL);
// look up object type
if (dpiConn_getObjectType(conn, QUEUE_OBJECT_TYPE,
strlen(QUEUE_OBJECT_TYPE), &objType) < 0)
return dpiSamples_showError();
if (dpiObjectType_getAttributes(objType, NUM_ATTRS, attrs) < 0)
return dpiSamples_showError();
// create queue
if (dpiConn_newQueue(conn, QUEUE_NAME, strlen(QUEUE_NAME),
objType, &queue) < 0)
return dpiSamples_showError();
dpiConn_release(conn);
// create message properties and set payload
if (dpiConn_newMsgProps(conn, &msgProps) < 0)
return dpiSamples_showError();
if (dpiObjectType_createObject(objType, &book) < 0)
return dpiSamples_showError();
if (dpiMsgProps_setPayloadObject(msgProps, book) < 0)
return dpiSamples_showError();
// enqueue books
printf("Enqueuing messages...\n");
for (i = 0; i < NUM_BOOKS; i++) {
printf("%s\n", books[i].title);
// set title
dpiData_setBytes(&attrValue, books[i].title, strlen(books[i].title));
if (dpiObject_setAttributeValue(book, attrs[0], DPI_NATIVE_TYPE_BYTES,
&attrValue) < 0)
return dpiSamples_showError();
// set authors
dpiData_setBytes(&attrValue, books[i].authors,
strlen(books[i].authors));
if (dpiObject_setAttributeValue(book, attrs[1], DPI_NATIVE_TYPE_BYTES,
&attrValue) < 0)
return dpiSamples_showError();
// set price
dpiData_setDouble(&attrValue, books[i].price);
if (dpiObject_setAttributeValue(book, attrs[2], DPI_NATIVE_TYPE_DOUBLE,
&attrValue) < 0)
return dpiSamples_showError();
// enqueue book
if (dpiQueue_enqOne(queue, msgProps) < 0)
return dpiSamples_showError();
}
dpiObjectType_release(objType);
dpiMsgProps_release(msgProps);
dpiObject_release(book);
// get dequeue options from queue and set some options
if (dpiQueue_getDeqOptions(queue, &deqOptions) < 0)
return dpiSamples_showError();
if (dpiDeqOptions_setNavigation(deqOptions, DPI_DEQ_NAV_FIRST_MSG) < 0)
return dpiSamples_showError();
if (dpiDeqOptions_setWait(deqOptions, DPI_DEQ_WAIT_NO_WAIT) < 0)
return dpiSamples_showError();
// dequeue books
printf("\nDequeuing messages...\n");
while (1) {
if (dpiQueue_deqOne(queue, &msgProps) < 0)
return dpiSamples_showError();
if (!msgProps)
break;
if (dpiMsgProps_getPayload(msgProps, &book, NULL, NULL) < 0)
return dpiSamples_showError();
if (dpiObject_getAttributeValue(book, attrs[0], DPI_NATIVE_TYPE_BYTES,
&attrValue) < 0)
return dpiSamples_showError();
printf("%.*s\n", attrValue.value.asBytes.length,
attrValue.value.asBytes.ptr);
dpiMsgProps_release(msgProps);
}
for (i = 0; i < NUM_ATTRS; i++)
dpiObjectAttr_release(attrs[i]);
printf("\nDone.\n");
return 0;
}
|
