Reworked DatabaseService API.
Initial implementation of LockManager.
diff --git a/core/api/src/main/java/org/onlab/onos/store/service/BatchReadResult.java b/core/api/src/main/java/org/onlab/onos/store/service/BatchReadResult.java
new file mode 100644
index 0000000..7281eff
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/store/service/BatchReadResult.java
@@ -0,0 +1,21 @@
+package org.onlab.onos.store.service;
+
+import java.util.Collections;
+import java.util.List;
+
+public class BatchReadResult {
+	
+	private final List<ReadResult> readResults;
+	
+	public BatchReadResult(List<ReadResult> readResults)  {
+		this.readResults = Collections.unmodifiableList(readResults);
+	}
+	
+	public List<ReadResult> getAsList() {
+		return readResults;
+	}
+	
+	public int batchSize() {
+		return readResults.size();
+	}
+}
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