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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="Interface TransactionalTrait" class="title">Interface TransactionalTrait</h1> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Superinterfaces:</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 interface </span><span class="element-name type-name-label">TransactionalTrait</span><span class="extends-implements"> |
| extends <a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></span></div> |
| <div class="block">Provide <a href="Transactional.html" title="interface in org.apache.jena.sparql.core"><code>Transactional</code></a> as an indirection to another <a href="Transactional.html" title="interface in org.apache.jena.sparql.core"><code>Transactional</code></a>.</div> |
| <dl class="notes"> |
| <dt>API Note:</dt> |
| <dd>Downside - the "getTxn" method is public. The alternative is |
| copy-and-paste. See the <code>ExTransactions</code> in the jena-examples module.</dd> |
| </dl> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- ======== NESTED CLASS SUMMARY ======== --> |
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| <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> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
| <div id="method-summary-table"> |
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| <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-tab5"><code>default void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><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-tab5"> |
| <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-tab5"><code>default void</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#begin(org.apache.jena.query.ReadWrite)" class="member-name-link">begin</a><wbr>(<a href="../../query/ReadWrite.html" title="enum class in org.apache.jena.query">ReadWrite</a> mode)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Start either a READ or WRITE transaction.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><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> txnType)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <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-tab5"><code>default void</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><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-tab5"> |
| <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-tab5"><code>default void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><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-tab5"> |
| <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-tab3"><code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getTxn()" class="member-name-link">getTxn</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default boolean</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#isInTransaction()" class="member-name-link">isInTransaction</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Say whether inside a transaction.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default boolean</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#promote(org.apache.jena.sparql.core.Transactional.Promote)" class="member-name-link">promote</a><wbr>(<a href="Transactional.Promote.html" title="enum class in org.apache.jena.sparql.core">Transactional.Promote</a> txnType)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Attempt to promote a transaction from "read" mode to "write" and the transaction.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default boolean</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#supportsTransactionAbort()" class="member-name-link">supportsTransactionAbort</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default boolean</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#supportsTransactions()" class="member-name-link">supportsTransactions</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default <a href="../../query/ReadWrite.html" title="enum class in org.apache.jena.query">ReadWrite</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#transactionMode()" class="member-name-link">transactionMode</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Return the current mode of the transaction - "read" or "write".</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default <a href="../../query/TxnType.html" title="enum class in org.apache.jena.query">TxnType</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#transactionType()" class="member-name-link">transactionType</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Return the transaction type used in <code>begin(TxnType)</code>.</div> |
| </div> |
| </div> |
| </div> |
| </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"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="getTxn()"> |
| <h3>getTxn</h3> |
| <div class="member-signature"><span class="return-type"><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></span> <span class="element-name">getTxn</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">default</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> txnType)</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> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="begin(org.apache.jena.query.ReadWrite)"> |
| <h3>begin</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type">void</span> <span class="element-name">begin</span><wbr><span class="parameters">(<a href="../../query/ReadWrite.html" title="enum class in org.apache.jena.query">ReadWrite</a> mode)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="Transactional.html#begin(org.apache.jena.query.ReadWrite)">Transactional</a></code></span></div> |
| <div class="block">Start either a READ or WRITE transaction.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="Transactional.html#begin(org.apache.jena.query.ReadWrite)">begin</a></code> in interface <code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="commit()"> |
| <h3>commit</h3> |
| <div class="member-signature"><span class="modifiers">default</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> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="promote(org.apache.jena.sparql.core.Transactional.Promote)"> |
| <h3>promote</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type">boolean</span> <span class="element-name">promote</span><wbr><span class="parameters">(<a href="Transactional.Promote.html" title="enum class in org.apache.jena.sparql.core">Transactional.Promote</a> txnType)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="Transactional.html#promote(org.apache.jena.sparql.core.Transactional.Promote)">Transactional</a></code></span></div> |
| <div class="block">Attempt to promote a transaction from "read" mode to "write" and the transaction. This |
| method allows the form of promotion to be specified. The transaction must not have been started |
| with <code>READ</code>, which is read-only. |
| <p> |
| An argument of <code>READ_PROMOTE</code> treats the promotion as if the transaction was started |
| with <code>READ_PROMOTE</code> (any other writer commiting since the transaction started |
| blocks promotion) and <code>READ_COMMITTED_PROMOTE</code> treats the promotion as if the transaction was started |
| with <code>READ_COMMITTED_PROMOTE</code> (intemediate writer commits become visible). |
| <p> |
| Returns "true" if the transaction is in write mode after the call. The method |
| always succeeds of the transaction is already "write". |
| <p> |
| This method returns true if a <code>READ_PROMOTE</code> or |
| <code>READ_COMMITTED_PROMOTE</code> is promoted. |
| <p> |
| This method returns false if a <code>READ_PROMOTE</code> can't be promoted - the |
| transaction is still valid and in "read" mode. |
| <p> |
| This method throws an exception if there is an attempt to promote a <code>READ</code> |
| transaction.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="Transactional.html#promote(org.apache.jena.sparql.core.Transactional.Promote)">promote</a></code> in interface <code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="abort()"> |
| <h3>abort</h3> |
| <div class="member-signature"><span class="modifiers">default</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> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="isInTransaction()"> |
| <h3>isInTransaction</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type">boolean</span> <span class="element-name">isInTransaction</span>()</div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="Transactional.html#isInTransaction()">Transactional</a></code></span></div> |
| <div class="block">Say whether inside a transaction.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="Transactional.html#isInTransaction()">isInTransaction</a></code> in interface <code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="end()"> |
| <h3>end</h3> |
| <div class="member-signature"><span class="modifiers">default</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> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="transactionMode()"> |
| <h3>transactionMode</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type"><a href="../../query/ReadWrite.html" title="enum class in org.apache.jena.query">ReadWrite</a></span> <span class="element-name">transactionMode</span>()</div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="Transactional.html#transactionMode()">Transactional</a></code></span></div> |
| <div class="block">Return the current mode of the transaction - "read" or "write". |
| If the caller is not in a transaction, this method returns null.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="Transactional.html#transactionMode()">transactionMode</a></code> in interface <code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="transactionType()"> |
| <h3>transactionType</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type"><a href="../../query/TxnType.html" title="enum class in org.apache.jena.query">TxnType</a></span> <span class="element-name">transactionType</span>()</div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="Transactional.html#transactionType()">Transactional</a></code></span></div> |
| <div class="block">Return the transaction type used in <code>begin(TxnType)</code>. |
| If the caller is not in a transaction, this method returns null.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="Transactional.html#transactionType()">transactionType</a></code> in interface <code><a href="Transactional.html" title="interface in org.apache.jena.sparql.core">Transactional</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="supportsTransactions()"> |
| <h3>supportsTransactions</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type">boolean</span> <span class="element-name">supportsTransactions</span>()</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="supportsTransactionAbort()"> |
| <h3>supportsTransactionAbort</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type">boolean</span> <span class="element-name">supportsTransactionAbort</span>()</div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
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