this.namespace = Preconditions.checkNotNull(namespace, "nameSpace should not be null");
this.moduleName = Preconditions.checkNotNull(moduleName, "moduleName should not be null");
this.shardName = Preconditions.checkNotNull(shardName, "shardName should not be null");
this.namespace = Preconditions.checkNotNull(namespace, "nameSpace should not be null");
this.moduleName = Preconditions.checkNotNull(moduleName, "moduleName should not be null");
this.shardName = Preconditions.checkNotNull(shardName, "shardName should not be null");