X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-common-api%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fmd%2Fsal%2Fcommon%2Fapi%2Fdata%2FAsyncDataBroker.java;h=26935f2df8c07cbc4472a85a183768967d1970f3;hb=0f69f9e83ca8602d7ad7646ff4e146f802c534c1;hp=87bbfd3d065a374e729c5f4e894bc4f40ddb17f9;hpb=e467b27c2487308a0e4b12f3565b6e1077e103e2;p=controller.git

diff --git a/opendaylight/md-sal/sal-common-api/src/main/java/org/opendaylight/controller/md/sal/common/api/data/AsyncDataBroker.java b/opendaylight/md-sal/sal-common-api/src/main/java/org/opendaylight/controller/md/sal/common/api/data/AsyncDataBroker.java
index 87bbfd3d06..26935f2df8 100644
--- a/opendaylight/md-sal/sal-common-api/src/main/java/org/opendaylight/controller/md/sal/common/api/data/AsyncDataBroker.java
+++ b/opendaylight/md-sal/sal-common-api/src/main/java/org/opendaylight/controller/md/sal/common/api/data/AsyncDataBroker.java
@@ -7,62 +7,58 @@
  */
 package org.opendaylight.controller.md.sal.common.api.data;
 
-import org.opendaylight.yangtools.concepts.ListenerRegistration;
 import org.opendaylight.yangtools.concepts.Path;
 
-public interface AsyncDataBroker<P extends Path<P>, D, L extends AsyncDataChangeListener<P, D>> extends //
-        AsyncDataTransactionFactory<P, D> {
-
-    /**
-     *
-     * Scope of Data Change
-     *
-     * Represents scope of data change (addition, replacement, deletion).
-     *
-     * The terminology for types is reused from LDAP
-     *
-     * @see http://www.idevelopment.info/data/LDAP/LDAP_Resources/SEARCH_Setting_the_SCOPE_Parameter.shtml
-     */
-    public enum DataChangeScope {
-
-       /**
-        * Represents only a direct change of the node, such as replacement of node,
-        * addition or deletion.
-        *
-        */
-       BASE,
-       /**
-        * Represent a change (addition,replacement,deletion)
-        * of the node or one of it's direct childs.
-        *
-        */
-       ONE,
-       /**
-        * Represents a change of the node or any of it's child nodes.
-        *
-        */
-       SUBTREE
-    }
+/**
+ * Base interface that provides access to a conceptual data tree store and also provides the ability to
+ * subscribe for changes to data under a given branch of the tree.
+ *
+ * <p>
+ * All operations on the data tree are performed via one of the transactions:
+ * <ul>
+ * <li>Read-Only - allocated using {@link #newReadOnlyTransaction()}
+ * <li>Write-Only - allocated using {@link #newWriteOnlyTransaction()}
+ * <li>Read-Write - allocated using {@link #newReadWriteTransaction()}
+ * </ul>
+ *
+ * <p>
+ * These transactions provide a stable isolated view of data tree, which is
+ * guaranteed to be not affected by other concurrent transactions, until
+ * transaction is committed.
+ *
+ * <p>
+ * For a detailed explanation of how transaction are isolated and how transaction-local
+ * changes are committed to global data tree, see
+ * {@link AsyncReadTransaction}, {@link AsyncWriteTransaction},
+ * {@link AsyncReadWriteTransaction} and {@link AsyncWriteTransaction#submit()}.
+ *
+ *
+ * <p>
+ * It is strongly recommended to use the type of transaction, which
+ * provides only the minimal capabilities you need. This allows for
+ * optimizations at the data broker / data store level. For example,
+ * implementations may optimize the transaction for reading if they know ahead
+ * of time that you only need to read data - such as not keeping additional meta-data,
+ * which may be required for write transactions.
+ *
+ * <p>
+ * <b>Implementation Note:</b> This interface is not intended to be implemented
+ * by users of MD-SAL, but only to be consumed by them.
+ *
+ * @param <P>
+ *            Type of path (subtree identifier), which represents location in
+ *            tree
+ * @param <D>
+ *            Type of data (payload), which represents data payload
+ */
+public interface AsyncDataBroker<P extends Path<P>, D> extends AsyncDataTransactionFactory<P, D> {
 
     @Override
-    public AsyncReadTransaction<P, D> newReadOnlyTransaction();
+    AsyncReadOnlyTransaction<P, D> newReadOnlyTransaction();
 
     @Override
-    public AsyncReadWriteTransaction<P,D> newReadWriteTransaction();
+    AsyncReadWriteTransaction<P, D> newReadWriteTransaction();
 
     @Override
-    public AsyncWriteTransaction<P, D> newWriteOnlyTransaction();
-
-    /**
-     * Registers {@link DataChangeListener} for Data Change callbacks
-     * which will be triggered on which will be triggered on the store
-     *
-     * @param store Logical store in which listener is registered.
-     * @param path Path (subtree identifier) on which client listener will be invoked.
-     * @param listener Instance of listener which should be invoked on
-     * @param triggeringScope Scope of change which triggers callback.
-     * @return Listener registration of the listener, call {@link ListenerRegistration#close()}
-     *         to stop delivery of change events.
-     */
-    ListenerRegistration<L> registerDataChangeListener(LogicalDatastoreType store, P path, L listener, DataChangeScope triggeringScope);
+    AsyncWriteTransaction<P, D> newWriteOnlyTransaction();
 }