X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatastore%2Fshardstrategy%2FShardStrategyFactory.java;h=7b574530ee490824cf4f3a10343eea367cef6ef1;hb=3859df9beca8f13f1ff2b2744ed3470a1715bec3;hp=210537925b151a0b0c140433d4d1f009fa90acf6;hpb=18f8f0b852694daf18e8fd034ba576d78499e0ee;p=controller.git

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 210537925b..7b574530ee 100644
--- 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
@@ -5,44 +5,61 @@
  * 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.controller.cluster.datastore.shardstrategy;
 
-import com.google.common.base.Preconditions;
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
+import static com.google.common.base.Preconditions.checkState;
+import static java.util.Objects.requireNonNull;
 
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
+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 Map<String, ShardStrategy> moduleNameToStrategyMap = new ConcurrentHashMap();
+    private static final String UNKNOWN_MODULE_NAME = "unknown";
+
+    private final Configuration configuration;
+    private final LogicalDatastoreType logicalStoreType;
 
-  private static final String UNKNOWN_MODULE_NAME = "unknown";
+    public ShardStrategyFactory(final Configuration configuration, final LogicalDatastoreType logicalStoreType) {
+        checkState(configuration != null, "configuration should not be missing");
+        this.configuration = configuration;
+        this.logicalStoreType = requireNonNull(logicalStoreType);
+    }
 
-  public static ShardStrategy getStrategy(InstanceIdentifier path){
-    Preconditions.checkNotNull(path, "path should not be null");
+    public ShardStrategy getStrategy(final YangInstanceIdentifier path) {
+        // try with the legacy module based shard mapping
+        final String moduleName = getModuleName(requireNonNull(path, "path should not be null"));
+        final ShardStrategy shardStrategy = configuration.getStrategyForModule(moduleName);
+        if (shardStrategy == null) {
+            // retry with prefix based sharding
+            final ShardStrategy strategyForPrefix =
+                    configuration.getStrategyForPrefix(new DOMDataTreeIdentifier(logicalStoreType, path));
+            if (strategyForPrefix == null) {
+                return DefaultShardStrategy.getInstance();
+            }
+            return strategyForPrefix;
+        }
 
-    String moduleName = getModuleName(path);
-    ShardStrategy shardStrategy = moduleNameToStrategyMap.get(moduleName);
-    if(shardStrategy == null){
-      return new DefaultShardStrategy();
+        return shardStrategy;
     }
 
-    return shardStrategy;
-  }
+    public static ShardStrategy newShardStrategyInstance(final String moduleName, final String strategyName,
+            final Configuration configuration) {
+        if (ModuleShardStrategy.NAME.equals(strategyName)) {
+            return new ModuleShardStrategy(moduleName, configuration);
+        }
 
+        return DefaultShardStrategy.getInstance();
+    }
 
-  private static String getModuleName(InstanceIdentifier path){
-    return UNKNOWN_MODULE_NAME;
-  }
+    private String getModuleName(final YangInstanceIdentifier path) {
+        if (path.isEmpty()) {
+            return UNKNOWN_MODULE_NAME;
+        }
 
-  /**
-   * This is to be used in the future to register a custom shard strategy
-   *
-   * @param moduleName
-   * @param shardStrategy
-   */
-  public static void registerShardStrategy(String moduleName, ShardStrategy shardStrategy){
-    throw new UnsupportedOperationException("registering a custom shard strategy not supported yet");
-  }
+        String namespace = path.getPathArguments().get(0).getNodeType().getNamespace().toASCIIString();
+        String moduleName = configuration.getModuleNameFromNameSpace(namespace);
+        return moduleName != null ? moduleName : UNKNOWN_MODULE_NAME;
+    }
 }