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| <div class="subTitle">org.apache.felix.cm</div> |
| <h2 title="Interface PersistenceManager" class="title">Interface PersistenceManager</h2> |
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| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../../org/apache/felix/cm/file/FilePersistenceManager.html" title="class in org.apache.felix.cm.file">FilePersistenceManager</a></dd> |
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| <pre>public interface <span class="strong">PersistenceManager</span></pre> |
| <div class="block">The <code>PersistenceManager</code> interface defines the API to be |
| implemented to support persisting configuration data. This interface may |
| be implemented by bundles, which support storing configuration data in |
| different locations. |
| <p> |
| The Apache Felix Configuration Admin Service bundles provides an |
| implementation of this interface using the platform filesystem to store |
| configuration data. |
| <p> |
| Implementations of this interface must support loading and storing |
| <code>java.util.Dictionary</code> objects as defined in section 104.4.2, |
| Configuration Properties, of the Configuration Admin Service Specification |
| Version 1.2. |
| <p> |
| To make implementations of this interface available to the Configuration |
| Admin Service they must be registered as service for this interface. The |
| Configuration Admin Service will consider all registered services plus the |
| default platform file system based implementation to load configuration data. |
| To store new configuration data, the persistence manager service with the |
| highest rank value - the <code>service.ranking</code> service property - is |
| used. If no pesistence manager service has been registered, the platfrom |
| file system based implementation is used.</div> |
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| <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span>Methods</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/felix/cm/PersistenceManager.html#delete(java.lang.String)">delete</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> pid)</code> |
| <div class="block">Removes the <code>Dictionary</code> for the given <code>pid</code>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/felix/cm/PersistenceManager.html#exists(java.lang.String)">exists</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> pid)</code> |
| <div class="block">Returns <code>true</code> if a persisted <code>Dictionary</code> exists |
| for the given <code>pid</code>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/Enumeration.html?is-external=true" title="class or interface in java.util">Enumeration</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/felix/cm/PersistenceManager.html#getDictionaries()">getDictionaries</a></strong>()</code> |
| <div class="block">Returns an enumeration of all <code>Dictionary</code> objects known to |
| this persistence manager.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/Dictionary.html?is-external=true" title="class or interface in java.util">Dictionary</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/felix/cm/PersistenceManager.html#load(java.lang.String)">load</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> pid)</code> |
| <div class="block">Returns the <code>Dictionary</code> for the given <code>pid</code>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/felix/cm/PersistenceManager.html#store(java.lang.String, java.util.Dictionary)">store</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> pid, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Dictionary.html?is-external=true" title="class or interface in java.util">Dictionary</a> properties)</code> |
| <div class="block">Stores the <code>Dictionary</code> under the given <code>pid</code>.</div> |
| </td> |
| </tr> |
| </table> |
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| <h4>exists</h4> |
| <pre>boolean exists(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> pid)</pre> |
| <div class="block">Returns <code>true</code> if a persisted <code>Dictionary</code> exists |
| for the given <code>pid</code>.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>pid</code> - The identifier for the dictionary to test.</dd></dl> |
| </li> |
| </ul> |
| <a name="load(java.lang.String)"> |
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| <h4>load</h4> |
| <pre><a href="http://docs.oracle.com/javase/7/docs/api/java/util/Dictionary.html?is-external=true" title="class or interface in java.util">Dictionary</a> load(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> pid) |
| throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Returns the <code>Dictionary</code> for the given <code>pid</code>. |
| <p> |
| Implementations are expected to return dictionary instances which may be |
| modified by the caller without affecting any underlying data or affecting |
| future calls to this method with the same PID. In other words the |
| reference equation <code>load(pid) != load(pid)</code> must hold |
| <code>true</code>.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>pid</code> - The identifier for the dictionary to load.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>The dictionary for the identifier. This must not be |
| <code>null</code> but may be empty.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - If an error occurrs loading the dictionary. An |
| <code>IOException</code> must also be thrown if no dictionary |
| exists for the given identifier.</dd></dl> |
| </li> |
| </ul> |
| <a name="getDictionaries()"> |
| <!-- --> |
| </a> |
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| <h4>getDictionaries</h4> |
| <pre><a href="http://docs.oracle.com/javase/7/docs/api/java/util/Enumeration.html?is-external=true" title="class or interface in java.util">Enumeration</a> getDictionaries() |
| throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Returns an enumeration of all <code>Dictionary</code> objects known to |
| this persistence manager. |
| <p> |
| Implementations of this method are allowed to return lazy enumerations. |
| That is, it is allowable for the enumeration to not return a dictionary |
| if loading it results in an error. |
| <p> |
| Implementations are expected to return dictionary instances which may be |
| modified by the caller without affecting any underlying data or affecting |
| future calls to this method. |
| <p> |
| The <code>Enumeration</code> returned from this method must be stable |
| against concurrent calls to either of the <a href="../../../../org/apache/felix/cm/PersistenceManager.html#load(java.lang.String)"><code>load(String)</code></a>, |
| <a href="../../../../org/apache/felix/cm/PersistenceManager.html#store(java.lang.String, java.util.Dictionary)"><code>store(String, Dictionary)</code></a>, and <a href="../../../../org/apache/felix/cm/PersistenceManager.html#delete(java.lang.String)"><code>delete(String)</code></a> methods.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>A possibly empty Enumeration of all dictionaries.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - If an error occurrs getting the dictionaries.</dd></dl> |
| </li> |
| </ul> |
| <a name="store(java.lang.String, java.util.Dictionary)"> |
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| <h4>store</h4> |
| <pre>void store(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> pid, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Dictionary.html?is-external=true" title="class or interface in java.util">Dictionary</a> properties) |
| throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Stores the <code>Dictionary</code> under the given <code>pid</code>. |
| <p> |
| The dictionary provided to this method must be considered private to the |
| caller. Any modification by the caller after this method finishes must |
| not influence any internal storage of the provided data. Implementations |
| must not modify the dictionary.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>pid</code> - The identifier of the dictionary.</dd><dd><code>properties</code> - The <code>Dictionary</code> to store.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - If an error occurrs storing the dictionary. If this |
| exception is thrown, it is expected, that |
| <a href="../../../../org/apache/felix/cm/PersistenceManager.html#exists(java.lang.String)"><code>exists(pid</code></a> returns <code>false</code>.</dd></dl> |
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| <h4>delete</h4> |
| <pre>void delete(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> pid) |
| throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Removes the <code>Dictionary</code> for the given <code>pid</code>. If |
| such a dictionary does not exist, this method has no effect.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>pid</code> - The identifier of the dictionary to delet.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - If an error occurrs deleting the dictionary. This |
| exception must not be thrown if no dictionary with the given |
| identifier exists.</dd></dl> |
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