X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=sxp-integration%2Fsxp-ep-provider%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fgroupbasedpolicy%2Fsxp%2Fep%2Fprovider%2Fimpl%2FDSAsyncDao.java;fp=sxp-integration%2Fsxp-ep-provider%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fgroupbasedpolicy%2Fsxp%2Fep%2Fprovider%2Fimpl%2FDSAsyncDao.java;h=c97a134773a3af637ed7174ab111c42da11b0364;hb=eace708ec9dd394c5eb7b74c46d1176d82e775e7;hp=0000000000000000000000000000000000000000;hpb=660f6fb82d48f2c43b92cd273593d49e3644bb41;p=groupbasedpolicy.git

diff --git a/sxp-integration/sxp-ep-provider/src/main/java/org/opendaylight/groupbasedpolicy/sxp/ep/provider/impl/DSAsyncDao.java b/sxp-integration/sxp-ep-provider/src/main/java/org/opendaylight/groupbasedpolicy/sxp/ep/provider/impl/DSAsyncDao.java
new file mode 100644
index 000000000..c97a13477
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+++ b/sxp-integration/sxp-ep-provider/src/main/java/org/opendaylight/groupbasedpolicy/sxp/ep/provider/impl/DSAsyncDao.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.groupbasedpolicy.sxp.ep.provider.impl;
+
+import com.google.common.base.Optional;
+import com.google.common.util.concurrent.ListenableFuture;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+
+/**
+ * Purpose: encapsulate access to DS by exposing
+ * <dl>
+ * <dt>read</dt>
+ * <dd>search through values (either in local cache or directly in DataStore)</dd>
+ * </dl>
+ *
+ * @param <K> data key type
+ * @param <V> data type
+ */
+public interface DSAsyncDao<K, V extends DataObject> {
+
+    /**
+     * @param key for search
+     * @return value found by key
+     */
+    ListenableFuture<Optional<V>> read(@Nonnull K key);
+
+}