diff --git a/src/java/voldemort/client/CachingStoreClientFactory.java b/src/java/voldemort/client/CachingStoreClientFactory.java
new file mode 100644
index 0000000000..e7430650ff
--- /dev/null
+++ b/src/java/voldemort/client/CachingStoreClientFactory.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2008-2010 LinkedIn, Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package voldemort.client;
+
+import voldemort.cluster.failuredetector.FailureDetector;
+import voldemort.store.Store;
+import voldemort.utils.Pair;
+import voldemort.versioning.InconsistencyResolver;
+import voldemort.versioning.Versioned;
+
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
+/**
+ * A wrapper for a store {@link StoreClientFactory} which caches requests
+ * to getStoreClient
+ *
+ */
+public class CachingStoreClientFactory implements StoreClientFactory {
+
+ private final StoreClientFactory inner;
+ private final ConcurrentMap, StoreClient> cache;
+
+ public CachingStoreClientFactory(StoreClientFactory inner) {
+ this.inner = inner;
+ this.cache = new ConcurrentHashMap, StoreClient>();
+ }
+
+
+ @SuppressWarnings("unchecked")
+ public StoreClient getStoreClient(String storeName) {
+ Pair key = Pair.create(storeName, null);
+ StoreClient retVal = cache.get(key);
+ if(retVal == null) {
+ retVal = inner.getStoreClient(storeName);
+ cache.putIfAbsent(key, retVal);
+ }
+
+ return retVal;
+ }
+
+ @SuppressWarnings("unchecked")
+ public StoreClient getStoreClient(String storeName,
+ InconsistencyResolver> resolver) {
+ Pair key = Pair.create(storeName, (Object) resolver);
+ StoreClient retVal = cache.get(key);
+ if(retVal == null) {
+ retVal = inner.getStoreClient(storeName, resolver);
+ cache.putIfAbsent(key, retVal);
+ }
+
+ return retVal;
+ }
+
+ public Store getRawStore(String storeName,
+ InconsistencyResolver> resolver) {
+ return inner.getRawStore(storeName, resolver);
+ }
+
+ public void close() {
+ try {
+ cache.clear();
+ } finally {
+ inner.close();
+ }
+ }
+
+ public FailureDetector getFailureDetector() {
+ return inner.getFailureDetector();
+ }
+}
diff --git a/src/java/voldemort/versioning/ArbitraryInconsistencyResolver.java b/src/java/voldemort/versioning/ArbitraryInconsistencyResolver.java
index da60f6fff2..4d60cd9216 100644
--- a/src/java/voldemort/versioning/ArbitraryInconsistencyResolver.java
+++ b/src/java/voldemort/versioning/ArbitraryInconsistencyResolver.java
@@ -41,4 +41,15 @@ public List resolveConflicts(List values) {
return Collections.singletonList(values.get(0));
}
+ @Override
+ public boolean equals(Object o) {
+ if(o == this)
+ return true;
+ return (o instanceof ArbitraryInconsistencyResolver);
+ }
+
+ @Override
+ public int hashCode() {
+ return 31 * this.getClass().hashCode();
+ }
}
diff --git a/src/java/voldemort/versioning/ChainedResolver.java b/src/java/voldemort/versioning/ChainedResolver.java
index fd0acc11f7..b8e2cbd796 100644
--- a/src/java/voldemort/versioning/ChainedResolver.java
+++ b/src/java/voldemort/versioning/ChainedResolver.java
@@ -48,4 +48,21 @@ public List resolveConflicts(List items) {
return items;
}
+ @Override
+ public boolean equals(Object o) {
+ if (this == o) return true;
+ if (o == null || getClass() != o.getClass()) return false;
+
+ ChainedResolver that = (ChainedResolver) o;
+
+ if (resolvers != null ? !resolvers.equals(that.resolvers) : that.resolvers != null)
+ return false;
+
+ return true;
+ }
+
+ @Override
+ public int hashCode() {
+ return resolvers != null ? resolvers.hashCode() : 0;
+ }
}
diff --git a/src/java/voldemort/versioning/FailingInconsistencyResolver.java b/src/java/voldemort/versioning/FailingInconsistencyResolver.java
index dfa91f605b..11f271bd50 100644
--- a/src/java/voldemort/versioning/FailingInconsistencyResolver.java
+++ b/src/java/voldemort/versioning/FailingInconsistencyResolver.java
@@ -31,4 +31,17 @@ public List resolveConflicts(List items) {
else
return items;
}
+
+
+ @Override
+ public boolean equals(Object o) {
+ if(o == this)
+ return true;
+ return (o instanceof FailingInconsistencyResolver);
+ }
+
+ @Override
+ public int hashCode() {
+ return 31 * this.getClass().hashCode();
+ }
}
diff --git a/src/java/voldemort/versioning/MergingInconsistencyResolver.java b/src/java/voldemort/versioning/MergingInconsistencyResolver.java
index c8339cc942..91d95487e1 100644
--- a/src/java/voldemort/versioning/MergingInconsistencyResolver.java
+++ b/src/java/voldemort/versioning/MergingInconsistencyResolver.java
@@ -49,4 +49,17 @@ public List> resolveConflicts(List> items) {
return Collections.singletonList(new Versioned(merged, clock));
}
}
+
+
+ @Override
+ public boolean equals(Object o) {
+ if(o == this)
+ return true;
+ return (o instanceof MergingInconsistencyResolver);
+ }
+
+ @Override
+ public int hashCode() {
+ return 31 * this.getClass().hashCode();
+ }
}
diff --git a/src/java/voldemort/versioning/TimeBasedInconsistencyResolver.java b/src/java/voldemort/versioning/TimeBasedInconsistencyResolver.java
index ded077bc55..3b14e91e09 100644
--- a/src/java/voldemort/versioning/TimeBasedInconsistencyResolver.java
+++ b/src/java/voldemort/versioning/TimeBasedInconsistencyResolver.java
@@ -43,4 +43,17 @@ public List> resolveConflicts(List> items) {
return Collections.singletonList(max);
}
}
+
+
+ @Override
+ public boolean equals(Object o) {
+ if(o == this)
+ return true;
+ return (o instanceof TimeBasedInconsistencyResolver);
+ }
+
+ @Override
+ public int hashCode() {
+ return 31 * this.getClass().hashCode();
+ }
}
diff --git a/src/java/voldemort/versioning/VectorClockInconsistencyResolver.java b/src/java/voldemort/versioning/VectorClockInconsistencyResolver.java
index 7411a0786e..24fdeb4a9c 100644
--- a/src/java/voldemort/versioning/VectorClockInconsistencyResolver.java
+++ b/src/java/voldemort/versioning/VectorClockInconsistencyResolver.java
@@ -54,4 +54,16 @@ public List> resolveConflicts(List> items) {
}
return newItems;
}
+
+ @Override
+ public boolean equals(Object o) {
+ if(o == this)
+ return true;
+ return (o instanceof VectorClockInconsistencyResolver);
+ }
+
+ @Override
+ public int hashCode() {
+ return 31 * this.getClass().hashCode();
+ }
}
diff --git a/test/unit/voldemort/client/CachingStoreClientFactoryTest.java b/test/unit/voldemort/client/CachingStoreClientFactoryTest.java
new file mode 100644
index 0000000000..862deef097
--- /dev/null
+++ b/test/unit/voldemort/client/CachingStoreClientFactoryTest.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2008-2010 LinkedIn, Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package voldemort.client;
+
+import org.junit.Test;
+import voldemort.serialization.StringSerializer;
+import voldemort.versioning.TimeBasedInconsistencyResolver;
+
+import static org.junit.Assert.*;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.*;
+
+public class CachingStoreClientFactoryTest {
+
+ @Test
+ public void testCaching() {
+ StoreClientFactory inner = new MockStoreClientFactory(new StringSerializer(),
+ new StringSerializer(),
+ null);
+ StoreClientFactory spyFactory = spy(inner);
+ StoreClientFactory cachingFactory = new CachingStoreClientFactory(spyFactory);
+ TimeBasedInconsistencyResolver