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| <li>Summary: </li> |
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| <div class="sub-title"><span class="module-label-in-type">Module</span> <a href="../../../../../module-summary.html">org.apache.jena.arq</a></div> |
| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.jena.sparql.core</a></div> |
| <h1 title="Class TxnDataset2Graph" class="title">Class TxnDataset2Graph</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"><a href="TransactionalLock.html" title="class in org.apache.jena.sparql.core">org.apache.jena.sparql.core.TransactionalLock</a> |
| <div class="inheritance">org.apache.jena.sparql.core.TxnDataset2Graph</div> |
| </div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">TxnDataset2Graph</span> |
| <span class="extends-implements">extends <a href="TransactionalLock.html" title="class in org.apache.jena.sparql.core">TransactionalLock</a></span></div> |
| <div class="block">A <a href="Transactional.html" title="interface in org.apache.jena.sparql.core"><code>Transactional</code></a> that passes the transaction operations down to transactions on |
| independent graphs. |
| <p> |
| There are limitations: |
| <ul> |
| <li>we can't atomically do all the commits together in the crash situation. |
| <li>This <code>Transactional</code> maintains a MRSW policy because that is all that is |
| required of graphs in general. |
| </ul> |
| It does cover the important case of one graph (<a href="DatasetGraphOne.html" title="class in org.apache.jena.sparql.core"><code>DatasetGraphOne</code></a>) where the one |
| graph is an InfGraph and should work when the graphs in the dataset is not changing or |
| when a new memory graph is added mid-transaction. |
| <p> |
| This is not "nested transactions" - there is no overall "commit" or "abort". If |
| failure/restart occurs, some graphs may have committed and others not. It is the best |
| that can be done given for an arbitrary collection of graphs, backed by different |
| storage and having different capabilities. |
| <p> |
| Best practice is to change the graph membership outside of any transaction, |
| ideally at setup time of the object using this class. (Caution: SPARQL Update |
| can create graphs.)</div> |
| <dl class="notes"> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list"> |
| <li><a href="DatasetGraphMapLink.html" title="class in org.apache.jena.sparql.core"><code>DatasetGraphMapLink</code></a></li> |
| <li><a href="DatasetGraphOne.html" title="class in org.apache.jena.sparql.core"><code>DatasetGraphOne</code></a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- ======== NESTED CLASS SUMMARY ======== --> |
| <li> |
| <section class="nested-class-summary" id="nested-class-summary"> |
| <h2>Nested Class Summary</h2> |
| <div class="inherited-list"> |
| <h2 id="nested-classes-inherited-from-class-org.apache.jena.sparql.core.Transactional">Nested classes/interfaces inherited from interface org.apache.jena.sparql.core.<a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></h2> |
| <code><a href="Transactional.Promote.html" title="enum class in org.apache.jena.sparql.core">Transactional.Promote</a></code></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.graph.Graph,org.apache.jena.graph.Graph...)" class="member-name-link">TxnDataset2Graph</a><wbr>(org.apache.jena.graph.Graph primaryGraph, |
| org.apache.jena.graph.Graph... otherGraphs)</code></div> |
| <div class="col-last even-row-color"> </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>void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#abort()" class="member-name-link">abort</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Abort a transaction - finish the transaction and undo any changes (if a "write" transaction)</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="#addGraph(org.apache.jena.graph.Graph)" class="member-name-link">addGraph</a><wbr>(org.apache.jena.graph.Graph graph)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </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="#begin(org.apache.jena.query.TxnType)" class="member-name-link">begin</a><wbr>(<a href="../../query/TxnType.html" title="enum class in org.apache.jena.query">TxnType</a> type)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Start a transaction.<br/> |
| READ or WRITE transactions start in that state and do not change for the |
| lifetime of the transaction.</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="#commit()" class="member-name-link">commit</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Commit a transaction - finish the transaction and make any changes permanent (if a "write" transaction)</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="#end()" class="member-name-link">end</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Finish the transaction - if a write transaction and commit() has not been called, then abort</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="#removeGraph(org.apache.jena.graph.Graph)" class="member-name-link">removeGraph</a><wbr>(org.apache.jena.graph.Graph graph)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </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="#setPrimaryGraph(org.apache.jena.graph.Graph)" class="member-name-link">setPrimaryGraph</a><wbr>(org.apache.jena.graph.Graph graph)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div> |
| </div> |
| </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-org.apache.jena.sparql.core.TransactionalLock">Methods inherited from class org.apache.jena.sparql.core.<a href="TransactionalLock.html" title="class in org.apache.jena.sparql.core">TransactionalLock</a></h3> |
| <code><a href="TransactionalLock.html#begin(org.apache.jena.query.ReadWrite)">begin</a>, <a href="TransactionalLock.html#create(org.apache.jena.shared.Lock)">create</a>, <a href="TransactionalLock.html#createMRPlusSW()">createMRPlusSW</a>, <a href="TransactionalLock.html#createMRSW()">createMRSW</a>, <a href="TransactionalLock.html#createMutex()">createMutex</a>, <a href="TransactionalLock.html#isInTransaction()">isInTransaction</a>, <a href="TransactionalLock.html#isTransactionMode(org.apache.jena.query.ReadWrite)">isTransactionMode</a>, <a href="TransactionalLock.html#promote(org.apache.jena.sparql.core.Transactional.Promote)">promote</a>, <a href="TransactionalLock.html#transactionMode()">transactionMode</a>, <a href="TransactionalLock.html#transactionType()">transactionType</a></code></div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class 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> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-org.apache.jena.sparql.core.Transactional">Methods inherited from interface org.apache.jena.sparql.core.<a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></h3> |
| <code><a href="Transactional.html#begin()">begin</a>, <a href="Transactional.html#calc(org.apache.jena.query.TxnType,java.util.function.Supplier)">calc</a>, <a href="Transactional.html#calculate(java.util.function.Supplier)">calculate</a>, <a href="Transactional.html#calculateRead(java.util.function.Supplier)">calculateRead</a>, <a href="Transactional.html#calculateWrite(java.util.function.Supplier)">calculateWrite</a>, <a href="Transactional.html#exec(org.apache.jena.query.TxnType,java.lang.Runnable)">exec</a>, <a href="Transactional.html#execute(java.lang.Runnable)">execute</a>, <a href="Transactional.html#executeRead(java.lang.Runnable)">executeRead</a>, <a href="Transactional.html#executeWrite(java.lang.Runnable)">executeWrite</a>, <a href="Transactional.html#promote()">promote</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li> |
| <section class="constructor-details" id="constructor-detail"> |
| <h2>Constructor Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="<init>(org.apache.jena.graph.Graph,org.apache.jena.graph.Graph...)"> |
| <h3>TxnDataset2Graph</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="element-name">TxnDataset2Graph</span><wbr><span class="parameters">(org.apache.jena.graph.Graph primaryGraph, |
| org.apache.jena.graph.Graph... otherGraphs)</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="addGraph(org.apache.jena.graph.Graph)"> |
| <h3>addGraph</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">addGraph</span><wbr><span class="parameters">(org.apache.jena.graph.Graph graph)</span></div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="removeGraph(org.apache.jena.graph.Graph)"> |
| <h3>removeGraph</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">removeGraph</span><wbr><span class="parameters">(org.apache.jena.graph.Graph graph)</span></div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="setPrimaryGraph(org.apache.jena.graph.Graph)"> |
| <h3>setPrimaryGraph</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">setPrimaryGraph</span><wbr><span class="parameters">(org.apache.jena.graph.Graph graph)</span></div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="begin(org.apache.jena.query.TxnType)"> |
| <h3>begin</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">begin</span><wbr><span class="parameters">(<a href="../../query/TxnType.html" title="enum class in org.apache.jena.query">TxnType</a> type)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="Transactional.html#begin(org.apache.jena.query.TxnType)">Transactional</a></code></span></div> |
| <div class="block">Start a transaction.<br/> |
| READ or WRITE transactions start in that state and do not change for the |
| lifetime of the transaction. |
| <ul> |
| |
| <li><code>WRITE</code>: this guarantees a WRITE will complete if <code>commit()</code> is |
| called. The same as <code>begin(ReadWrite.WRITE)</code>. |
| |
| <li><code>READ</code>: the transaction can not promote to WRITE,ensuring read-only |
| access to the data. The same as <code>begin(ReadWrite.READ)</code>. |
| |
| <li><code>READ_PROMOTE</code>: the transaction will go from "read" to "write" if an |
| update is attempted and if the dataset has not been changed by another write |
| transaction. See also <a href="Transactional.html#promote()"><code>Transactional.promote()</code></a>. |
| |
| <li><code>READ_COMMITTED_PROMOTE</code>: Use this with care. The promotion will |
| succeed but changes from other transactions become visible. |
| |
| </ul> |
| |
| Read committed: at the point transaction attempts promotion from "read" to |
| "write", the system checks if the dataset has change since the transaction started |
| (called <code>begin</code>). If <code>READ_PROMOTE</code>, the dataset must not have |
| changed; if <code>READ_COMMITTED_PROMOTE</code> any intermediate changes are |
| visible but the application can not assume any data it has read in the |
| transaction is the same as it was at the point the transaction started. |
| <p> |
| This operation is optional and some implementations may throw |
| a <a href="../JenaTransactionException.html" title="class in org.apache.jena.sparql"><code>JenaTransactionException</code></a> exception for some or all <a href="../../query/TxnType.html" title="enum class in org.apache.jena.query"><code>TxnType</code></a> values. |
| <p> |
| See <a href="Transactional.html#begin(org.apache.jena.query.ReadWrite)"><code>Transactional.begin(ReadWrite)</code></a> for a form that is required of implementations.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="Transactional.html#begin(org.apache.jena.query.TxnType)">begin</a></code> in interface <code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></dd> |
| <dt>Overrides:</dt> |
| <dd><code><a href="TransactionalLock.html#begin(org.apache.jena.query.TxnType)">begin</a></code> in class <code><a href="TransactionalLock.html" title="class in org.apache.jena.sparql.core">TransactionalLock</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="commit()"> |
| <h3>commit</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">commit</span>()</div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="Transactional.html#commit()">Transactional</a></code></span></div> |
| <div class="block">Commit a transaction - finish the transaction and make any changes permanent (if a "write" transaction)</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="Transactional.html#commit()">commit</a></code> in interface <code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></dd> |
| <dt>Overrides:</dt> |
| <dd><code><a href="TransactionalLock.html#commit()">commit</a></code> in class <code><a href="TransactionalLock.html" title="class in org.apache.jena.sparql.core">TransactionalLock</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="abort()"> |
| <h3>abort</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">abort</span>()</div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="Transactional.html#abort()">Transactional</a></code></span></div> |
| <div class="block">Abort a transaction - finish the transaction and undo any changes (if a "write" transaction)</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="Transactional.html#abort()">abort</a></code> in interface <code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></dd> |
| <dt>Overrides:</dt> |
| <dd><code><a href="TransactionalLock.html#abort()">abort</a></code> in class <code><a href="TransactionalLock.html" title="class in org.apache.jena.sparql.core">TransactionalLock</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="end()"> |
| <h3>end</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">end</span>()</div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="Transactional.html#end()">Transactional</a></code></span></div> |
| <div class="block">Finish the transaction - if a write transaction and commit() has not been called, then abort</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="Transactional.html#end()">end</a></code> in interface <code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></dd> |
| <dt>Overrides:</dt> |
| <dd><code><a href="TransactionalLock.html#end()">end</a></code> in class <code><a href="TransactionalLock.html" title="class in org.apache.jena.sparql.core">TransactionalLock</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
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