BUG-2138: Create DistributedShardFrontend

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / shardstrategy / ShardStrategyFactory.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/shardstrategy/ShardStrategyFactory.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/shardstrategy/ShardStrategyFactory.java
index 1a5a4ac3137ebc9f9b10f1d14f96e53cdebc1fcb..724499477ebde6a5b03fbba4a72d3c14564a6886 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/shardstrategy/ShardStrategyFactory.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/shardstrategy/ShardStrategyFactory.java
@@ -10,25 +10,36 @@ package org.opendaylight.controller.cluster.datastore.shardstrategy;
 
 import com.google.common.base.Preconditions;
 import org.opendaylight.controller.cluster.datastore.config.Configuration;
+import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 
 public class ShardStrategyFactory {
     private static final String UNKNOWN_MODULE_NAME = "unknown";
 
     private final Configuration configuration;
+    private final LogicalDatastoreType logicalStoreType;
 
-    public ShardStrategyFactory(final Configuration configuration) {
+    public ShardStrategyFactory(final Configuration configuration, LogicalDatastoreType logicalStoreType) {
         Preconditions.checkState(configuration != null, "configuration should not be missing");
         this.configuration = configuration;
+        this.logicalStoreType = Preconditions.checkNotNull(logicalStoreType);
     }
 
     public ShardStrategy getStrategy(final YangInstanceIdentifier path) {
         Preconditions.checkNotNull(path, "path should not be null");
 
-        String moduleName = getModuleName(path);
-        ShardStrategy shardStrategy = configuration.getStrategyForModule(moduleName);
+        // try with the legacy module based shard mapping
+        final String moduleName = getModuleName(path);
+        final ShardStrategy shardStrategy = configuration.getStrategyForModule(moduleName);
         if (shardStrategy == null) {
-            return DefaultShardStrategy.getInstance();
+            // retry with prefix based sharding
+            final ShardStrategy strategyForPrefix =
+                    configuration.getStrategyForPrefix(new DOMDataTreeIdentifier(logicalStoreType, path));
+            if (strategyForPrefix == null) {
+                return DefaultShardStrategy.getInstance();
+            }
+            return strategyForPrefix;
         }
 
         return shardStrategy;
@@ -36,7 +47,7 @@ public class ShardStrategyFactory {
 
     public static ShardStrategy newShardStrategyInstance(String moduleName, String strategyName,
             Configuration configuration) {
-        if(ModuleShardStrategy.NAME.equals(strategyName)){
+        if (ModuleShardStrategy.NAME.equals(strategyName)) {
             return new ModuleShardStrategy(moduleName, configuration);
         }
 
@@ -44,6 +55,10 @@ public class ShardStrategyFactory {
     }
 
     private String getModuleName(final YangInstanceIdentifier path) {
+        if (path.isEmpty()) {
+            return UNKNOWN_MODULE_NAME;
+        }
+
         String namespace = path.getPathArguments().iterator().next().getNodeType().getNamespace().toASCIIString();
         String moduleName = configuration.getModuleNameFromNameSpace(namespace);
         return moduleName != null ? moduleName : UNKNOWN_MODULE_NAME;