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| <div class="subTitle">org.eclipse.persistence.sequencing</div> |
| <h2 title="Interface SequencingControl" class="title">Interface SequencingControl</h2> |
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| <pre>public interface <span class="typeNameLabel">SequencingControl</span></pre> |
| <div class="block"><p> |
| <b>Purpose</b>: Define an interface to control sequencing functionality. |
| <p> |
| <b>Description</b>: This interface is accessed through DatabaseSession.getSequencingControl(). |
| It allows to create, re-create, customize Sequencing object |
| which is available through DatabaseSession.getSequencing() |
| and provides sequencing values for all descriptors that use sequencing. |
| |
| Here's the lifecycle of Sequencing object used by DatabaseSession: |
| 1. DatabaseSession created - sequencing object doesn't yet exist; |
| 2. DatabaseSession.login() causes creation of Sequencing object; |
| 3. DatabaseSession.logout() causes destruction of Sequencing object. |
| |
| In case sequencing object doesn't yet exist all the set parameters' values will be used |
| during its creation. |
| |
| In case sequencing object already exists: |
| 1. The following methods don't alter sequencing object - the corresponding parameters will only |
| be used in case a new sequencing object is created: |
| setShouldUseSeparateConnection; |
| setLogin; |
| setMinPoolSize; |
| setMaxPoolSize. |
| 2. The following methods cause immediate destruction of the sequencing object and creation of a new one: |
| setValueGenerationPolicy; |
| setShouldUseNativeSequencing; |
| setShouldUseTableSequencing; |
| resetSequencing; |
| 3. The following methods cause change immediately: |
| setPreallocationSize (next sequencing preallocation will use the set parameter's value). |
| <p> |
| <b>Responsibilities</b>: |
| <ul> |
| <li> Define the APIs for controlling sequencing. |
| </ul></div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/sequencing/Sequence.html" title="class in org.eclipse.persistence.sequencing"><code>Sequence</code></a>, |
| <a href="../../../../org/eclipse/persistence/sessions/DatabaseSession.html" title="interface in org.eclipse.persistence.sessions"><code>DatabaseSession</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/eclipse/persistence/sessions/server/ConnectionPool.html" title="class in org.eclipse.persistence.sessions.server">ConnectionPool</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#getConnectionPool--">getConnectionPool</a></span>()</code> |
| <div class="block">ADVANCED: |
| Return the connection pool to use for sequencing.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/eclipse/persistence/sessions/Login.html" title="interface in org.eclipse.persistence.sessions">Login</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#getLogin--">getLogin</a></span>()</code> |
| <div class="block">ADVANCED: |
| Return a DatabaseLogin to be used by separate sequencing connection(s).</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#getMaxPoolSize--">getMaxPoolSize</a></span>()</code> |
| <div class="block">PUBLIC: |
| Returns a maximum number of connections in sequencing connection pool</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#getMinPoolSize--">getMinPoolSize</a></span>()</code> |
| <div class="block">PUBLIC: |
| Returns a minimum number of connections in sequencing connection pool.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#initializePreallocated--">initializePreallocated</a></span>()</code> |
| <div class="block">ADVANCED: |
| Removes all preallocated sequencing objects.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#initializePreallocated-java.lang.String-">initializePreallocated</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> seqName)</code> |
| <div class="block">ADVANCED: |
| Removes all preallocated sequencing objects for the given sequence name.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#isConnectedUsingSeparateConnection--">isConnectedUsingSeparateConnection</a></span>()</code> |
| <div class="block">PUBLIC: |
| Indicates whether sequencing actually uses separate connection(s).</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#resetSequencing--">resetSequencing</a></span>()</code> |
| <div class="block">ADVANCED: |
| Immediately re-create sequencing object.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#setConnectionPool-org.eclipse.persistence.sessions.server.ConnectionPool-">setConnectionPool</a></span>(<a href="../../../../org/eclipse/persistence/sessions/server/ConnectionPool.html" title="class in org.eclipse.persistence.sessions.server">ConnectionPool</a> pool)</code> |
| <div class="block">ADVANCED: |
| Set the connection pool to use for sequencing.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#setInitialPoolSize-int-">setInitialPoolSize</a></span>(int size)</code> |
| <div class="block">PUBLIC: |
| Sets a initial number of connections in sequencing connection pool |
| The set value is ignored if shouldUseSeparateConnection() returns false.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#setLogin-org.eclipse.persistence.sessions.Login-">setLogin</a></span>(<a href="../../../../org/eclipse/persistence/sessions/Login.html" title="interface in org.eclipse.persistence.sessions">Login</a> login)</code> |
| <div class="block">ADVANCED: |
| Returns a DatabaseLogin to be used by separate sequencing connection(s) |
| The set value is ignored if shouldUseSeparateConnection() returns false.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#setMaxPoolSize-int-">setMaxPoolSize</a></span>(int size)</code> |
| <div class="block">PUBLIC: |
| Sets a maximum number of connections in sequencing connection pool |
| The set value is ignored if shouldUseSeparateConnection() returns false.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#setMinPoolSize-int-">setMinPoolSize</a></span>(int size)</code> |
| <div class="block">PUBLIC: |
| Sets a minimum number of connections in sequencing connection pool |
| The set value is ignored if shouldUseSeparateConnection() returns false.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#setShouldUseSeparateConnection-boolean-">setShouldUseSeparateConnection</a></span>(boolean shouldUseSeparateConnection)</code> |
| <div class="block">PUBLIC: |
| Set whether separate connection(s) for sequencing could be used |
| (by default it couldn't).</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/sequencing/SequencingControl.html#shouldUseSeparateConnection--">shouldUseSeparateConnection</a></span>()</code> |
| <div class="block">PUBLIC: |
| Indicate whether separate connection(s) for sequencing could be used |
| (by default it couldn't).</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="resetSequencing--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>resetSequencing</h4> |
| <pre>void resetSequencing()</pre> |
| <div class="block">ADVANCED: |
| Immediately re-create sequencing object. |
| The only reason to use this method is to pick up all parameters' |
| values that were changed after the original sequencing object has been created.</div> |
| </li> |
| </ul> |
| <a name="shouldUseSeparateConnection--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>shouldUseSeparateConnection</h4> |
| <pre>boolean shouldUseSeparateConnection()</pre> |
| <div class="block">PUBLIC: |
| Indicate whether separate connection(s) for sequencing could be used |
| (by default it couldn't). |
| If this flag is set to true then separate connection(s) for sequencing |
| will be used in case getSequence().shouldUseSeparateConnection() |
| returns true.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/sequencing/Sequence.html" title="class in org.eclipse.persistence.sequencing"><code>Sequence</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setShouldUseSeparateConnection-boolean-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setShouldUseSeparateConnection</h4> |
| <pre>void setShouldUseSeparateConnection(boolean shouldUseSeparateConnection)</pre> |
| <div class="block">PUBLIC: |
| Set whether separate connection(s) for sequencing could be used |
| (by default it couldn't). |
| If this flag is set to true then separate connection(s) for sequencing |
| will be used in case getSequence().shouldUseSeparateConnection() |
| returns true.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/sequencing/Sequence.html" title="class in org.eclipse.persistence.sequencing"><code>Sequence</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isConnectedUsingSeparateConnection--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isConnectedUsingSeparateConnection</h4> |
| <pre>boolean isConnectedUsingSeparateConnection()</pre> |
| <div class="block">PUBLIC: |
| Indicates whether sequencing actually uses separate connection(s). |
| Returns true if sequencing is connected and uses separate connection(s). |
| Returns false if sequencing is not connected (getSequencing()==null). |
| Note that if shouldUseSeparateConnection() returns false this method also returns false. |
| However if shouldUseSeparateConnection() returns true this method |
| returns false in the following two cases: |
| <br>sequencing is not connected; |
| <br>getSequence().shouldUseSeparateConnection() == false.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/sequencing/Sequence.html" title="class in org.eclipse.persistence.sequencing"><code>Sequence</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getLogin--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getLogin</h4> |
| <pre><a href="../../../../org/eclipse/persistence/sessions/Login.html" title="interface in org.eclipse.persistence.sessions">Login</a> getLogin()</pre> |
| <div class="block">ADVANCED: |
| Return a DatabaseLogin to be used by separate sequencing connection(s).</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/sessions/DatabaseLogin.html" title="class in org.eclipse.persistence.sessions"><code>DatabaseLogin</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setLogin-org.eclipse.persistence.sessions.Login-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>setLogin</h4> |
| <pre>void setLogin(<a href="../../../../org/eclipse/persistence/sessions/Login.html" title="interface in org.eclipse.persistence.sessions">Login</a> login)</pre> |
| <div class="block">ADVANCED: |
| Returns a DatabaseLogin to be used by separate sequencing connection(s) |
| The set value is ignored if shouldUseSeparateConnection() returns false. |
| The DatabaseLogin *MUST*: |
| 1. specify *NON-JTS* connections (such as NON_JTS driver or read-only datasource); |
| 2. sequenceLogin.shouldUseExternalTransactionController()==false |
| In case this method is not called, but separate connection should be used, |
| sequencing will use a clone of login owned by the DatabaseSession, |
| or a clone of read login owned by ServerSession.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/sessions/DatabaseLogin.html" title="class in org.eclipse.persistence.sessions"><code>DatabaseLogin</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getConnectionPool--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getConnectionPool</h4> |
| <pre><a href="../../../../org/eclipse/persistence/sessions/server/ConnectionPool.html" title="class in org.eclipse.persistence.sessions.server">ConnectionPool</a> getConnectionPool()</pre> |
| <div class="block">ADVANCED: |
| Return the connection pool to use for sequencing.</div> |
| </li> |
| </ul> |
| <a name="setConnectionPool-org.eclipse.persistence.sessions.server.ConnectionPool-"> |
| <!-- --> |
| </a> |
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| <h4>setConnectionPool</h4> |
| <pre>void setConnectionPool(<a href="../../../../org/eclipse/persistence/sessions/server/ConnectionPool.html" title="class in org.eclipse.persistence.sessions.server">ConnectionPool</a> pool)</pre> |
| <div class="block">ADVANCED: |
| Set the connection pool to use for sequencing.</div> |
| </li> |
| </ul> |
| <a name="getMinPoolSize--"> |
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| </a> |
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| <h4>getMinPoolSize</h4> |
| <pre>int getMinPoolSize()</pre> |
| <div class="block">PUBLIC: |
| Returns a minimum number of connections in sequencing connection pool.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/sessions/server/ConnectionPool.html" title="class in org.eclipse.persistence.sessions.server"><code>ConnectionPool</code></a>, |
| <a href="../../../../org/eclipse/persistence/sessions/server/ServerSession.html" title="class in org.eclipse.persistence.sessions.server"><code>ServerSession</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>setMinPoolSize</h4> |
| <pre>void setMinPoolSize(int size)</pre> |
| <div class="block">PUBLIC: |
| Sets a minimum number of connections in sequencing connection pool |
| The set value is ignored if shouldUseSeparateConnection() returns false. |
| The set value is ignored if SequencingControl has been obtained not from ServerSession. |
| By default is 2.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/sessions/server/ConnectionPool.html" title="class in org.eclipse.persistence.sessions.server"><code>ConnectionPool</code></a>, |
| <a href="../../../../org/eclipse/persistence/sessions/server/ServerSession.html" title="class in org.eclipse.persistence.sessions.server"><code>ServerSession</code></a></dd> |
| </dl> |
| </li> |
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| <h4>getMaxPoolSize</h4> |
| <pre>int getMaxPoolSize()</pre> |
| <div class="block">PUBLIC: |
| Returns a maximum number of connections in sequencing connection pool</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/sessions/server/ConnectionPool.html" title="class in org.eclipse.persistence.sessions.server"><code>ConnectionPool</code></a>, |
| <a href="../../../../org/eclipse/persistence/sessions/server/ServerSession.html" title="class in org.eclipse.persistence.sessions.server"><code>ServerSession</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>setMaxPoolSize</h4> |
| <pre>void setMaxPoolSize(int size)</pre> |
| <div class="block">PUBLIC: |
| Sets a maximum number of connections in sequencing connection pool |
| The set value is ignored if shouldUseSeparateConnection() returns false. |
| The set value is ignored if SequencingControl has been obtained not from ServerSession. |
| By default is 2.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/sessions/server/ConnectionPool.html" title="class in org.eclipse.persistence.sessions.server"><code>ConnectionPool</code></a>, |
| <a href="../../../../org/eclipse/persistence/sessions/server/ServerSession.html" title="class in org.eclipse.persistence.sessions.server"><code>ServerSession</code></a></dd> |
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| <h4>setInitialPoolSize</h4> |
| <pre>void setInitialPoolSize(int size)</pre> |
| <div class="block">PUBLIC: |
| Sets a initial number of connections in sequencing connection pool |
| The set value is ignored if shouldUseSeparateConnection() returns false. |
| The set value is ignored if SequencingControl has been obtained not from ServerSession. |
| By default is 1.</div> |
| <dl> |
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| <h4>initializePreallocated</h4> |
| <pre>void initializePreallocated()</pre> |
| <div class="block">ADVANCED: |
| Removes all preallocated sequencing objects. |
| Ignored if getSequencingValueGenarationPolicy().shouldUsePreallocation() returns false. |
| This method is called internally after Sequencing object is destructed.</div> |
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| <dd><a href="../../../../org/eclipse/persistence/sequencing/Sequence.html" title="class in org.eclipse.persistence.sequencing"><code>Sequence</code></a></dd> |
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| <h4>initializePreallocated</h4> |
| <pre>void initializePreallocated(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> seqName)</pre> |
| <div class="block">ADVANCED: |
| Removes all preallocated sequencing objects for the given sequence name. |
| Ignored if getSequencingValueGenarationPolicy().shouldUsePreallocation() returns false.</div> |
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| <dd><a href="../../../../org/eclipse/persistence/sequencing/Sequence.html" title="class in org.eclipse.persistence.sequencing"><code>Sequence</code></a></dd> |
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