+ private final List<ModuleShard> moduleShards;
+
+ private final List<Module> modules;
+
+ private static final Logger
+ LOG = LoggerFactory.getLogger(DistributedDataStore.class);
+
+ // Look up maps to speed things up
+
+ // key = memberName, value = list of shardNames
+ private final Map<String, List<String>> memberShardNames = new HashMap<>();
+
+ // key = shardName, value = list of replicaNames (replicaNames are the same as memberNames)
+ private final Map<String, List<String>> shardReplicaNames = new HashMap<>();
+
+ private final ListMultimap<String, String> moduleNameToShardName;
+ private final Map<String, ShardStrategy> moduleNameToStrategy;
+ private final Map<String, String> namespaceToModuleName;
+ private final Set<String> allShardNames;
+
+ public ConfigurationImpl(final String moduleShardsConfigPath,
+
+ final String modulesConfigPath){
+
+ Preconditions.checkNotNull(moduleShardsConfigPath, "moduleShardsConfigPath should not be null");
+ Preconditions.checkNotNull(modulesConfigPath, "modulesConfigPath should not be null");
+
+
+ File moduleShardsFile = new File("./configuration/initial/" + moduleShardsConfigPath);
+ File modulesFile = new File("./configuration/initial/" + modulesConfigPath);
+
+ Config moduleShardsConfig = null;
+ if(moduleShardsFile.exists()) {
+ LOG.info("module shards config file exists - reading config from it");
+ moduleShardsConfig = ConfigFactory.parseFile(moduleShardsFile);
+ } else {
+ LOG.warn("module shards configuration read from resource");
+ moduleShardsConfig = ConfigFactory.load(moduleShardsConfigPath);
+ }
+
+ Config modulesConfig = null;
+ if(modulesFile.exists()) {
+ LOG.info("modules config file exists - reading config from it");
+ modulesConfig = ConfigFactory.parseFile(modulesFile);
+ } else {
+ LOG.warn("modules configuration read from resource");
+ modulesConfig = ConfigFactory.load(modulesConfigPath);
+ }
+
+ this.moduleShards = readModuleShards(moduleShardsConfig);
+ this.modules = readModules(modulesConfig);
+
+ this.allShardNames = createAllShardNames(moduleShards);
+ this.moduleNameToShardName = createModuleNameToShardName(moduleShards);
+ this.moduleNameToStrategy = createModuleNameToStrategy(modules);
+ this.namespaceToModuleName = createNamespaceToModuleName(modules);
+ }
+
+ private static Set<String> createAllShardNames(Iterable<ModuleShard> moduleShards) {
+ final com.google.common.collect.ImmutableSet.Builder<String> b = ImmutableSet.builder();
+ for(ModuleShard ms : moduleShards){
+ for(Shard s : ms.getShards()) {
+ b.add(s.getName());
+ }
+ }
+ return b.build();
+ }
+
+ private static Map<String, ShardStrategy> createModuleNameToStrategy(Iterable<Module> modules) {
+ final com.google.common.collect.ImmutableMap.Builder<String, ShardStrategy> b = ImmutableMap.builder();
+ for (Module m : modules) {
+ b.put(m.getName(), m.getShardStrategy());
+ }
+ return b.build();
+ }
+
+ private static Map<String, String> createNamespaceToModuleName(Iterable<Module> modules) {
+ final com.google.common.collect.ImmutableMap.Builder<String, String> b = ImmutableMap.builder();
+ for (Module m : modules) {
+ b.put(m.getNameSpace(), m.getName());
+ }
+ return b.build();
+ }