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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<!-- NewPage -->
<html lang="en">
<head>
<!-- Generated by javadoc (version 1.7.0_60) on Tue Feb 17 12:25:53 EST 2015 -->
<title>LockMode (Oracle - Berkeley DB Java API)</title>
<meta name="date" content="2015-02-17">
<link rel="stylesheet" type="text/css" href="../../../style.css" title="Style">
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="LockMode (Oracle - Berkeley DB Java API)";
}
//-->
</script>
<noscript>
<div>JavaScript is disabled on your browser.</div>
</noscript>
<!-- ========= START OF TOP NAVBAR ======= -->
<div class="topNav"><a name="navbar_top">
<!-- -->
</a><a href="#skip-navbar_top" title="Skip navigation links"></a><a name="navbar_top_firstrow">
<!-- -->
</a>
<ul class="navList" title="Navigation">
<li><a href="../../../overview-summary.html">Overview</a></li>
<li><a href="package-summary.html">Package</a></li>
<li class="navBarCell1Rev">Class</li>
<li><a href="class-use/LockMode.html">Use</a></li>
<li><a href="package-tree.html">Tree</a></li>
<li><a href="../../../deprecated-list.html">Deprecated</a></li>
<li><a href="../../../index-all.html">Index</a></li>
<li><a href="../../../help-doc.html">Help</a></li>
</ul>
<div class="aboutLanguage"><em><b>Berkeley DB</b><br><font size="-1"> version 6.1.23</font></em></div>
</div>
<div class="subNav">
<ul class="navList">
<li><a href="../../../com/sleepycat/db/LockDetectMode.html" title="class in com.sleepycat.db"><span class="strong">Prev Class</span></a></li>
<li><a href="../../../com/sleepycat/db/LockNotGrantedException.html" title="class in com.sleepycat.db"><span class="strong">Next Class</span></a></li>
</ul>
<ul class="navList">
<li><a href="../../../index.html?com/sleepycat/db/LockMode.html" target="_top">Frames</a></li>
<li><a href="LockMode.html" target="_top">No Frames</a></li>
</ul>
<ul class="navList" id="allclasses_navbar_top">
<li><a href="../../../allclasses-noframe.html">All Classes</a></li>
</ul>
<div>
<script type="text/javascript"><!--
allClassesLink = document.getElementById("allclasses_navbar_top");
if(window==top) {
allClassesLink.style.display = "block";
}
else {
allClassesLink.style.display = "none";
}
//-->
</script>
</div>
<div>
<ul class="subNavList">
<li>Summary: </li>
<li>Nested | </li>
<li><a href="#field_summary">Field</a> | </li>
<li>Constr | </li>
<li><a href="#method_summary">Method</a></li>
</ul>
<ul class="subNavList">
<li>Detail: </li>
<li><a href="#field_detail">Field</a> | </li>
<li>Constr | </li>
<li><a href="#method_detail">Method</a></li>
</ul>
</div>
<a name="skip-navbar_top">
<!-- -->
</a></div>
<!-- ========= END OF TOP NAVBAR ========= -->
<!-- ======== START OF CLASS DATA ======== -->
<div class="header">
<div class="subTitle">com.sleepycat.db</div>
<h2 title="Class LockMode" class="title">Class LockMode</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li>com.sleepycat.db.LockMode</li>
</ul>
</li>
</ul>
<div class="description">
<ul class="blockList">
<li class="blockList">
<hr>
<br>
<pre>public final class <span class="strong">LockMode</span>
extends java.lang.Object</pre>
<div class="block">Locking modes for database operations. Locking modes are required
parameters for operations that retrieve data or modify the database.</div>
</li>
</ul>
</div>
<div class="summary">
<ul class="blockList">
<li class="blockList">
<!-- =========== FIELD SUMMARY =========== -->
<ul class="blockList">
<li class="blockList"><a name="field_summary">
<!-- -->
</a>
<h3>Field Summary</h3>
<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
<caption><span>Fields</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/sleepycat/db/LockMode.html#DEFAULT">DEFAULT</a></strong></code>
<div class="block">Acquire read locks for read operations and write locks for write
operations.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/sleepycat/db/LockMode.html#DEGREE_2">DEGREE_2</a></strong></code>
<div class="block"><strong>Deprecated.</strong>
<div class="block"><i>This has been replaced by <a href="../../../com/sleepycat/db/LockMode.html#READ_COMMITTED"><code>READ_COMMITTED</code></a> to conform to ANSI
database isolation terminology.</i></div>
</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/sleepycat/db/LockMode.html#DIRTY_READ">DIRTY_READ</a></strong></code>
<div class="block"><strong>Deprecated.</strong>
<div class="block"><i>This has been replaced by <a href="../../../com/sleepycat/db/LockMode.html#READ_UNCOMMITTED"><code>READ_UNCOMMITTED</code></a> to conform to ANSI
database isolation terminology.</i></div>
</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/sleepycat/db/LockMode.html#IGNORE_LEASES">IGNORE_LEASES</a></strong></code>
<div class="block">Return the data item irrespective of the state of master leases.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/sleepycat/db/LockMode.html#READ_COMMITTED">READ_COMMITTED</a></strong></code>
<div class="block">Read committed isolation provides for cursor stability but not repeatable
reads.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/sleepycat/db/LockMode.html#READ_UNCOMMITTED">READ_UNCOMMITTED</a></strong></code>
<div class="block">Read modified but not yet committed data.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/sleepycat/db/LockMode.html#RMW">RMW</a></strong></code>
<div class="block">Acquire write locks instead of read locks when doing the retrieval.</div>
</td>
</tr>
</table>
</li>
</ul>
<!-- ========== METHOD SUMMARY =========== -->
<ul class="blockList">
<li class="blockList"><a name="method_summary">
<!-- -->
</a>
<h3>Method Summary</h3>
<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span>Methods</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../com/sleepycat/db/LockMode.html#toString()">toString</a></strong>()</code></td>
</tr>
</table>
<ul class="blockList">
<li class="blockList"><a name="methods_inherited_from_class_java.lang.Object">
<!-- -->
</a>
<h3>Methods inherited from class java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
<div class="details">
<ul class="blockList">
<li class="blockList">
<!-- ============ FIELD DETAIL =========== -->
<ul class="blockList">
<li class="blockList"><a name="field_detail">
<!-- -->
</a>
<h3>Field Detail</h3>
<a name="DEFAULT">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>DEFAULT</h4>
<pre>public static final <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a> DEFAULT</pre>
<div class="block">Acquire read locks for read operations and write locks for write
operations.</div>
</li>
</ul>
<a name="READ_UNCOMMITTED">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>READ_UNCOMMITTED</h4>
<pre>public static final <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a> READ_UNCOMMITTED</pre>
<div class="block">Read modified but not yet committed data.</div>
</li>
</ul>
<a name="READ_COMMITTED">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>READ_COMMITTED</h4>
<pre>public static final <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a> READ_COMMITTED</pre>
<div class="block">Read committed isolation provides for cursor stability but not repeatable
reads. Data items which have been previously read by this transaction may
be deleted or modified by other transactions before the cursor is closed or
the transaction completes.
<p>
Note that this LockMode may only be passed to <a href="../../../com/sleepycat/db/Database.html" title="class in com.sleepycat.db"><code>Database</code></a> get
methods, not to <a href="../../../com/sleepycat/db/Cursor.html" title="class in com.sleepycat.db"><code>Cursor</code></a> methods. To configure a cursor for
Read committed isolation, use <a href="../../../com/sleepycat/db/CursorConfig.html#setReadCommitted(boolean)"><code>CursorConfig.setReadCommitted(boolean)</code></a>.</div>
</li>
</ul>
<a name="RMW">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>RMW</h4>
<pre>public static final <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a> RMW</pre>
<div class="block">Acquire write locks instead of read locks when doing the retrieval.
Setting this flag can eliminate deadlock during a read-modify-write
cycle by acquiring the write lock during the read part of the cycle
so that another thread of control acquiring a read lock for the same
item, in its own read-modify-write cycle, will not result in deadlock.</div>
</li>
</ul>
<a name="DIRTY_READ">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>DIRTY_READ</h4>
<pre>public static final <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a> DIRTY_READ</pre>
<div class="block"><span class="strong">Deprecated.</span> <i>This has been replaced by <a href="../../../com/sleepycat/db/LockMode.html#READ_UNCOMMITTED"><code>READ_UNCOMMITTED</code></a> to conform to ANSI
database isolation terminology.</i></div>
<div class="block">Read modified but not yet committed data.
<p></div>
</li>
</ul>
<a name="DEGREE_2">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>DEGREE_2</h4>
<pre>public static final <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a> DEGREE_2</pre>
<div class="block"><span class="strong">Deprecated.</span> <i>This has been replaced by <a href="../../../com/sleepycat/db/LockMode.html#READ_COMMITTED"><code>READ_COMMITTED</code></a> to conform to ANSI
database isolation terminology.</i></div>
<div class="block">Read committed isolation provides for cursor stability but not repeatable
reads. Data items which have been previously read by this transaction may
be deleted or modified by other transactions before the cursor is closed or
the transaction completes.
<p>
Note that this LockMode may only be passed to <a href="../../../com/sleepycat/db/Database.html" title="class in com.sleepycat.db"><code>Database</code></a> get
methods, not to <a href="../../../com/sleepycat/db/Cursor.html" title="class in com.sleepycat.db"><code>Cursor</code></a> methods. To configure a cursor for
Read committed isolation, use <a href="../../../com/sleepycat/db/CursorConfig.html#setReadCommitted(boolean)"><code>CursorConfig.setReadCommitted(boolean)</code></a>.
<p></div>
</li>
</ul>
<a name="IGNORE_LEASES">
<!-- -->
</a>
<ul class="blockListLast">
<li class="blockList">
<h4>IGNORE_LEASES</h4>
<pre>public static final <a href="../../../com/sleepycat/db/LockMode.html" title="class in com.sleepycat.db">LockMode</a> IGNORE_LEASES</pre>
<div class="block">Return the data item irrespective of the state of master leases. The item
will be returned under all conditions: if master leases are not configured,
if the request is made to a client, if the request is made to a master with
a valid lease, or if the request is made to a master without a valid lease.</div>
</li>
</ul>
</li>
</ul>
<!-- ============ METHOD DETAIL ========== -->
<ul class="blockList">
<li class="blockList"><a name="method_detail">
<!-- -->
</a>
<h3>Method Detail</h3>
<a name="toString()">
<!-- -->
</a>
<ul class="blockListLast">
<li class="blockList">
<h4>toString</h4>
<pre>public java.lang.String toString()</pre>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code>toString</code> in class <code>java.lang.Object</code></dd>
</dl>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
<!-- ========= END OF CLASS DATA ========= -->
<!-- ======= START OF BOTTOM NAVBAR ====== -->
<div class="bottomNav"><a name="navbar_bottom">
<!-- -->
</a><a href="#skip-navbar_bottom" title="Skip navigation links"></a><a name="navbar_bottom_firstrow">
<!-- -->
</a>
<ul class="navList" title="Navigation">
<li><a href="../../../overview-summary.html">Overview</a></li>
<li><a href="package-summary.html">Package</a></li>
<li class="navBarCell1Rev">Class</li>
<li><a href="class-use/LockMode.html">Use</a></li>
<li><a href="package-tree.html">Tree</a></li>
<li><a href="../../../deprecated-list.html">Deprecated</a></li>
<li><a href="../../../index-all.html">Index</a></li>
<li><a href="../../../help-doc.html">Help</a></li>
</ul>
<div class="aboutLanguage"><em><b>Berkeley DB</b><br><font size="-1"> version 6.1.23</font></em></div>
</div>
<div class="subNav">
<ul class="navList">
<li><a href="../../../com/sleepycat/db/LockDetectMode.html" title="class in com.sleepycat.db"><span class="strong">Prev Class</span></a></li>
<li><a href="../../../com/sleepycat/db/LockNotGrantedException.html" title="class in com.sleepycat.db"><span class="strong">Next Class</span></a></li>
</ul>
<ul class="navList">
<li><a href="../../../index.html?com/sleepycat/db/LockMode.html" target="_top">Frames</a></li>
<li><a href="LockMode.html" target="_top">No Frames</a></li>
</ul>
<ul class="navList" id="allclasses_navbar_bottom">
<li><a href="../../../allclasses-noframe.html">All Classes</a></li>
</ul>
<div>
<script type="text/javascript"><!--
allClassesLink = document.getElementById("allclasses_navbar_bottom");
if(window==top) {
allClassesLink.style.display = "block";
}
else {
allClassesLink.style.display = "none";
}
//-->
</script>
</div>
<div>
<ul class="subNavList">
<li>Summary: </li>
<li>Nested | </li>
<li><a href="#field_summary">Field</a> | </li>
<li>Constr | </li>
<li><a href="#method_summary">Method</a></li>
</ul>
<ul class="subNavList">
<li>Detail: </li>
<li><a href="#field_detail">Field</a> | </li>
<li>Constr | </li>
<li><a href="#method_detail">Method</a></li>
</ul>
</div>
<a name="skip-navbar_bottom">
<!-- -->
</a></div>
<!-- ======== END OF BOTTOM NAVBAR ======= -->
<p class="legalCopy"><small><font size=1>Copyright (c) 1996, 2015 Oracle and/or its affiliates. All rights reserved.</font></small></p>
</body>
</html>
|
