2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.controller.cluster.datastore.shardstrategy;
11 import com.google.common.base.Preconditions;
12 import org.opendaylight.controller.cluster.datastore.config.Configuration;
13 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
15 public class ShardStrategyFactory {
16 private static final String UNKNOWN_MODULE_NAME = "unknown";
18 private final Configuration configuration;
20 public ShardStrategyFactory(final Configuration configuration) {
21 Preconditions.checkState(configuration != null, "configuration should not be missing");
22 this.configuration = configuration;
25 public ShardStrategy getStrategy(final YangInstanceIdentifier path) {
26 Preconditions.checkNotNull(path, "path should not be null");
28 String moduleName = getModuleName(path);
29 ShardStrategy shardStrategy = configuration.getStrategyForModule(moduleName);
30 if (shardStrategy == null) {
31 return DefaultShardStrategy.getInstance();
37 public static ShardStrategy newShardStrategyInstance(String moduleName, String strategyName,
38 Configuration configuration) {
39 if(ModuleShardStrategy.NAME.equals(strategyName)){
40 return new ModuleShardStrategy(moduleName, configuration);
43 return DefaultShardStrategy.getInstance();
46 private String getModuleName(final YangInstanceIdentifier path) {
47 String namespace = path.getPathArguments().iterator().next().getNodeType().getNamespace().toASCIIString();
48 String moduleName = configuration.getModuleNameFromNameSpace(namespace);
49 return moduleName != null ? moduleName : UNKNOWN_MODULE_NAME;