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
8 package org.opendaylight.controller.cluster.datastore.shardstrategy;
10 import static com.google.common.base.Preconditions.checkState;
11 import static java.util.Objects.requireNonNull;
13 import org.opendaylight.controller.cluster.datastore.config.Configuration;
14 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
16 public class ShardStrategyFactory {
17 private static final String UNKNOWN_MODULE_NAME = "unknown";
19 private final Configuration configuration;
21 public ShardStrategyFactory(final Configuration configuration) {
22 checkState(configuration != null, "configuration should not be missing");
23 this.configuration = configuration;
26 public ShardStrategy getStrategy(final YangInstanceIdentifier path) {
27 final String moduleName = getModuleName(requireNonNull(path, "path should not be null"));
28 final ShardStrategy shardStrategy = configuration.getStrategyForModule(moduleName);
29 if (shardStrategy == null) {
30 return DefaultShardStrategy.getInstance();
36 public static ShardStrategy newShardStrategyInstance(final String moduleName, final String strategyName,
37 final Configuration configuration) {
38 if (ModuleShardStrategy.NAME.equals(strategyName)) {
39 return new ModuleShardStrategy(moduleName, configuration);
42 return DefaultShardStrategy.getInstance();
45 private String getModuleName(final YangInstanceIdentifier path) {
47 return UNKNOWN_MODULE_NAME;
50 String namespace = path.getPathArguments().get(0).getNodeType().getNamespace().toString();
51 String moduleName = configuration.getModuleNameFromNameSpace(namespace);
52 return moduleName != null ? moduleName : UNKNOWN_MODULE_NAME;