tdb1/org.apache.jena.tdb/org/apache/jena/tdb1/transaction/TransactionManager.html - jena-site - Git at Google

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 <div class="sub-title"><span class="module-label-in-type">Module</span>&nbsp;<a href="../../../../../module-summary.html">org.apache.jena.tdb</a></div>
 <div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.jena.tdb1.transaction</a></div>
 <h1 title="Class TransactionManager" class="title">Class TransactionManager</h1>
 </div>
 <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
 <div class="inheritance">org.apache.jena.tdb1.transaction.TransactionManager</div>
 </div>
 <section class="class-description" id="class-description">
 <hr>
 <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">TransactionManager</span>
 <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span></div>
 </section>
 <section class="summary">
 <ul class="summary-list">
 <!-- =========== FIELD SUMMARY =========== -->
 <li>
 <section class="field-summary" id="field-summary">
 <h2>Field Summary</h2>
 <div class="caption"><span>Fields</span></div>
 <div class="summary-table three-column-summary">
 <div class="table-header col-first">Modifier and Type</div>
 <div class="table-header col-second">Field</div>
 <div class="table-header col-last">Description</div>
 <div class="col-first even-row-color"><code>static final boolean</code></div>
 <div class="col-second even-row-color"><code><a href="#DEBUG" class="member-name-link">DEBUG</a></code></div>
 <div class="col-last even-row-color">&nbsp;</div>
 <div class="col-first odd-row-color"><code>static int</code></div>
 <div class="col-second odd-row-color"><code><a href="#JournalThresholdSize" class="member-name-link">JournalThresholdSize</a></code></div>
 <div class="col-last odd-row-color">
 <div class="block">This controls how large to let the journal get in size
  before deciding to flush even if below the queue batch size.</div>
 </div>
 <div class="col-first even-row-color"><code>static int</code></div>
 <div class="col-second even-row-color"><code><a href="#MaxQueueThreshold" class="member-name-link">MaxQueueThreshold</a></code></div>
 <div class="col-last even-row-color">
 <div class="block">This controls how large to let the journal in comitted transactions
  before deciding to pause and flush as soon as possible.</div>
 </div>
 <div class="col-first odd-row-color"><code>static int</code></div>
 <div class="col-second odd-row-color"><code><a href="#QueueBatchSize" class="member-name-link">QueueBatchSize</a></code></div>
 <div class="col-last odd-row-color">
 <div class="block">This controls how many write transactions we batch up before
   deciding to try to flush the journal to the main database.</div>
 </div>
 </div>
 </section>
 </li>
 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 <li>
 <section class="constructor-summary" id="constructor-summary">
 <h2>Constructor Summary</h2>
 <div class="caption"><span>Constructors</span></div>
 <div class="summary-table two-column-summary">
 <div class="table-header col-first">Constructor</div>
 <div class="table-header col-last">Description</div>
 <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E(org.apache.jena.tdb1.store.DatasetGraphTDB)" class="member-name-link">TransactionManager</a><wbr>(<a href="../store/DatasetGraphTDB.html" title="class in org.apache.jena.tdb1.store">DatasetGraphTDB</a>&nbsp;dsg)</code></div>
 <div class="col-last even-row-color">&nbsp;</div>
 </div>
 </section>
 </li>
 <!-- ========== METHOD SUMMARY =========== -->
 <li>
 <section class="method-summary" id="method-summary">
 <h2>Method Summary</h2>
 <div id="method-summary-table">
 <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
 <div id="method-summary-table.tabpanel" role="tabpanel">
 <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
 <div class="table-header col-first">Modifier and Type</div>
 <div class="table-header col-second">Method</div>
 <div class="table-header col-last">Description</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#activeTransactions()" class="member-name-link">activeTransactions</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#addAdditionComponent(org.apache.jena.tdb1.transaction.TransactionLifecycle)" class="member-name-link">addAdditionComponent</a><wbr>(<a href="TransactionLifecycle.html" title="interface in org.apache.jena.tdb1.transaction">TransactionLifecycle</a>&nbsp;txnLifecycle)</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Add a <a href="TransactionLifecycle.html" title="interface in org.apache.jena.tdb1.transaction"><code>TransactionLifecycle</code></a> to transactions createed from this point onwards.</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="DatasetGraphTxn.html" title="class in org.apache.jena.tdb1.transaction">DatasetGraphTxn</a></code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#begin(org.apache.jena.query.TxnType,java.lang.String)" class="member-name-link">begin</a><wbr>(org.apache.jena.query.TxnType&nbsp;txnType,
  <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;label)</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#blockWriters()" class="member-name-link">blockWriters</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Block until no writers are active.</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#clearRecordingState()" class="member-name-link">clearRecordingState</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Clear all recording state - does not clear stats</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#closedown()" class="member-name-link">closedown</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#enableWriters()" class="member-name-link">enableWriters</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Allow writers.</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#finishExclusiveMode()" class="member-name-link">finishExclusiveMode</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Return to normal (release waiting transactions, allow new transactions).</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#flush()" class="member-name-link">flush</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Try to flush the delayed write queue - only happens if there are no active transactions</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>long</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getCountActiveReaders()" class="member-name-link">getCountActiveReaders</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>long</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getCountActiveWriters()" class="member-name-link">getCountActiveWriters</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/concurrent/locks/ReadWriteLock.html" title="class or interface in java.util.concurrent.locks" class="external-link">ReadWriteLock</a></code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getExclusivityLock$()" class="member-name-link">getExclusivityLock$</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Return the exclusivity lock.</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="Journal.html" title="class in org.apache.jena.tdb1.transaction">Journal</a></code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getJournal()" class="member-name-link">getJournal</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>long</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getQueueLength()" class="member-name-link">getQueueLength</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#recording()" class="member-name-link">recording</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Get recording state</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#recording(boolean)" class="member-name-link">recording</a><wbr>(boolean&nbsp;flag)</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Set recording on or off</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#startExclusiveMode()" class="member-name-link">startExclusiveMode</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Enter exclusive mode.</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="SysTxnState.html" title="class in org.apache.jena.tdb1.transaction">SysTxnState</a></code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#state()" class="member-name-link">state</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#tryBlockWriters()" class="member-name-link">tryBlockWriters</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Block until no writers are active or, optionally, return if can't at the moment.</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#tryExclusiveMode()" class="member-name-link">tryExclusiveMode</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Try to enter exclusive mode.</div>
 </div>
 </div>
 </div>
 </div>
 <div class="inherited-list">
 <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
 <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div>
 </section>
 </li>
 </ul>
 </section>
 <section class="details">
 <ul class="details-list">
 <!-- ============ FIELD DETAIL =========== -->
 <li>
 <section class="field-details" id="field-detail">
 <h2>Field Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="QueueBatchSize">
 <h3>QueueBatchSize</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">QueueBatchSize</span></div>
 <div class="block">This controls how many write transactions we batch up before
   deciding to try to flush the journal to the main database.</div>
 </section>
 </li>
 <li>
 <section class="detail" id="JournalThresholdSize">
 <h3>JournalThresholdSize</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">JournalThresholdSize</span></div>
 <div class="block">This controls how large to let the journal get in size
  before deciding to flush even if below the queue batch size.
  -1 means "off".</div>
 </section>
 </li>
 <li>
 <section class="detail" id="MaxQueueThreshold">
 <h3>MaxQueueThreshold</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">MaxQueueThreshold</span></div>
 <div class="block">This controls how large to let the journal in comitted transactions
  before deciding to pause and flush as soon as possible.
  -1 means "off".</div>
 </section>
 </li>
 <li>
 <section class="detail" id="DEBUG">
 <h3>DEBUG</h3>
 <div class="member-signature"><span class="modifiers">public static final</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">DEBUG</span></div>
 <dl class="notes">
 <dt>See Also:</dt>
 <dd>
 <ul class="see-list">
 <li><a href="../../../../../../constant-values.html#org.apache.jena.tdb1.transaction.TransactionManager.DEBUG">Constant Field Values</a></li>
 </ul>
 </dd>
 </dl>
 </section>
 </li>
 </ul>
 </section>
 </li>
 <!-- ========= CONSTRUCTOR DETAIL ======== -->
 <li>
 <section class="constructor-details" id="constructor-detail">
 <h2>Constructor Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="&lt;init&gt;(org.apache.jena.tdb1.store.DatasetGraphTDB)">
 <h3>TransactionManager</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">TransactionManager</span><wbr><span class="parameters">(<a href="../store/DatasetGraphTDB.html" title="class in org.apache.jena.tdb1.store">DatasetGraphTDB</a>&nbsp;dsg)</span></div>
 </section>
 </li>
 </ul>
 </section>
 </li>
 <!-- ============ METHOD DETAIL ========== -->
 <li>
 <section class="method-details" id="method-detail">
 <h2>Method Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="activeTransactions()">
 <h3>activeTransactions</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">activeTransactions</span>()</div>
 </section>
 </li>
 <li>
 <section class="detail" id="getCountActiveReaders()">
 <h3>getCountActiveReaders</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">long</span>&nbsp;<span class="element-name">getCountActiveReaders</span>()</div>
 </section>
 </li>
 <li>
 <section class="detail" id="getCountActiveWriters()">
 <h3>getCountActiveWriters</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">long</span>&nbsp;<span class="element-name">getCountActiveWriters</span>()</div>
 </section>
 </li>
 <li>
 <section class="detail" id="getQueueLength()">
 <h3>getQueueLength</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">long</span>&nbsp;<span class="element-name">getQueueLength</span>()</div>
 </section>
 </li>
 <li>
 <section class="detail" id="closedown()">
 <h3>closedown</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">closedown</span>()</div>
 </section>
 </li>
 <li>
 <section class="detail" id="addAdditionComponent(org.apache.jena.tdb1.transaction.TransactionLifecycle)">
 <h3>addAdditionComponent</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">addAdditionComponent</span><wbr><span class="parameters">(<a href="TransactionLifecycle.html" title="interface in org.apache.jena.tdb1.transaction">TransactionLifecycle</a>&nbsp;txnLifecycle)</span></div>
 <div class="block">Add a <a href="TransactionLifecycle.html" title="interface in org.apache.jena.tdb1.transaction"><code>TransactionLifecycle</code></a> to transactions createed from this point onwards.</div>
 </section>
 </li>
 <li>
 <section class="detail" id="begin(org.apache.jena.query.TxnType,java.lang.String)">
 <h3>begin</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="DatasetGraphTxn.html" title="class in org.apache.jena.tdb1.transaction">DatasetGraphTxn</a></span>&nbsp;<span class="element-name">begin</span><wbr><span class="parameters">(org.apache.jena.query.TxnType&nbsp;txnType,
  <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;label)</span></div>
 </section>
 </li>
 <li>
 <section class="detail" id="blockWriters()">
 <h3>blockWriters</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">blockWriters</span>()</div>
 <div class="block">Block until no writers are active.
   When this returns, it guarantees that the database is not changing
   and the journal is flush to disk.
  <p>
  The application must call <a href="#enableWriters()"><code>enableWriters()</code></a> later.
  <p>
  This operation must not be nested (it will block).</div>
 <dl class="notes">
 <dt>See Also:</dt>
 <dd>
 <ul class="see-list">
 <li><a href="#tryBlockWriters()"><code>tryBlockWriters()</code></a></li>
 <li><a href="#enableWriters()"><code>enableWriters()</code></a></li>
 </ul>
 </dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="tryBlockWriters()">
 <h3>tryBlockWriters</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">tryBlockWriters</span>()</div>
 <div class="block">Block until no writers are active or, optionally, return if can't at the moment.
  Return 'true' if the operation succeeded.
  <p>
  If it returns true, the application must call <a href="#enableWriters()"><code>enableWriters()</code></a> later.</div>
 <dl class="notes">
 <dt>See Also:</dt>
 <dd>
 <ul class="see-list">
 <li><a href="#blockWriters()"><code>blockWriters()</code></a></li>
 <li><a href="#enableWriters()"><code>enableWriters()</code></a></li>
 </ul>
 </dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="enableWriters()">
 <h3>enableWriters</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">enableWriters</span>()</div>
 <div class="block">Allow writers.
  This must be used in conjunction with <a href="#blockWriters()"><code>blockWriters()</code></a> or <a href="#tryBlockWriters()"><code>tryBlockWriters()</code></a></div>
 <dl class="notes">
 <dt>See Also:</dt>
 <dd>
 <ul class="see-list">
 <li><a href="#blockWriters()"><code>blockWriters()</code></a></li>
 <li><a href="#tryBlockWriters()"><code>tryBlockWriters()</code></a></li>
 </ul>
 </dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="startExclusiveMode()">
 <h3>startExclusiveMode</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">startExclusiveMode</span>()</div>
 <div class="block">Enter exclusive mode.
  <p>
  There are no active transactions on return; new transactions will be held up in 'begin'.
  Return to normal (release waiting transactions, allow new transactions)
  with <a href="#finishExclusiveMode()"><code>finishExclusiveMode()</code></a>.
  <p>
  The caller must not be inside a transaction associated with this TransactionManager.
  (The call will block waiting for that transaction to finish.)</div>
 </section>
 </li>
 <li>
 <section class="detail" id="tryExclusiveMode()">
 <h3>tryExclusiveMode</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">tryExclusiveMode</span>()</div>
 <div class="block">Try to enter exclusive mode.
   If return is true, then are no active transactions on return and new transactions will be held up in 'begin'.
   If false, there is an in-progress transactions.
   Return to normal (release waiting transactions, allow new transactions)
   with <a href="#finishExclusiveMode()"><code>finishExclusiveMode()</code></a>.
   <p>
   The call must not itself be in a transaction (this call will return false).</div>
 </section>
 </li>
 <li>
 <section class="detail" id="getExclusivityLock$()">
 <h3>getExclusivityLock$</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/concurrent/locks/ReadWriteLock.html" title="class or interface in java.util.concurrent.locks" class="external-link">ReadWriteLock</a></span>&nbsp;<span class="element-name">getExclusivityLock$</span>()</div>
 <div class="block">Return the exclusivity lock. Testing and internal use only.</div>
 </section>
 </li>
 <li>
 <section class="detail" id="finishExclusiveMode()">
 <h3>finishExclusiveMode</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">finishExclusiveMode</span>()</div>
 <div class="block">Return to normal (release waiting transactions, allow new transactions).
  Must be paired with an earlier <a href="#startExclusiveMode()"><code>startExclusiveMode()</code></a>.</div>
 </section>
 </li>
 <li>
 <section class="detail" id="flush()">
 <h3>flush</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">flush</span>()</div>
 <div class="block">Try to flush the delayed write queue - only happens if there are no active transactions</div>
 </section>
 </li>
 <li>
 <section class="detail" id="recording()">
 <h3>recording</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">recording</span>()</div>
 <div class="block">Get recording state</div>
 </section>
 </li>
 <li>
 <section class="detail" id="recording(boolean)">
 <h3>recording</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">recording</span><wbr><span class="parameters">(boolean&nbsp;flag)</span></div>
 <div class="block">Set recording on or off</div>
 </section>
 </li>
 <li>
 <section class="detail" id="clearRecordingState()">
 <h3>clearRecordingState</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">clearRecordingState</span>()</div>
 <div class="block">Clear all recording state - does not clear stats</div>
 </section>
 </li>
 <li>
 <section class="detail" id="getJournal()">
 <h3>getJournal</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="Journal.html" title="class in org.apache.jena.tdb1.transaction">Journal</a></span>&nbsp;<span class="element-name">getJournal</span>()</div>
 </section>
 </li>
 <li>
 <section class="detail" id="state()">
 <h3>state</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="SysTxnState.html" title="class in org.apache.jena.tdb1.transaction">SysTxnState</a></span>&nbsp;<span class="element-name">state</span>()</div>
 </section>
 </li>
 </ul>
 </section>
 </li>
 </ul>
 </section>
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