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<div class="subTitle">com.sleepycat.db</div>
<h2 title="Class LockMode" class="title">Class LockMode</h2>
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<li>java.lang.Object</li>
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<li>com.sleepycat.db.LockMode</li>
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<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>
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<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This has been replaced by 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This has been replaced by 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>
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<th class="colLast" scope="col">Method and Description</th>
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<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>
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<h3>Methods inherited from class java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<div class="aboutLanguage"><em><b>Berkeley DB</b><br><font size="-1"> version 6.1.29</font></em></div>
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