1/* 2 * 3 * Copyright 2014 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19// Package naming defines the naming API and related data structures for gRPC. 20// 21// This package is deprecated: please use package resolver instead. 22package naming 23 24// Operation defines the corresponding operations for a name resolution change. 25// 26// Deprecated: please use package resolver. 27type Operation uint8 28 29const ( 30 // Add indicates a new address is added. 31 Add Operation = iota 32 // Delete indicates an existing address is deleted. 33 Delete 34) 35 36// Update defines a name resolution update. Notice that it is not valid having both 37// empty string Addr and nil Metadata in an Update. 38// 39// Deprecated: please use package resolver. 40type Update struct { 41 // Op indicates the operation of the update. 42 Op Operation 43 // Addr is the updated address. It is empty string if there is no address update. 44 Addr string 45 // Metadata is the updated metadata. It is nil if there is no metadata update. 46 // Metadata is not required for a custom naming implementation. 47 Metadata interface{} 48} 49 50// Resolver creates a Watcher for a target to track its resolution changes. 51// 52// Deprecated: please use package resolver. 53type Resolver interface { 54 // Resolve creates a Watcher for target. 55 Resolve(target string) (Watcher, error) 56} 57 58// Watcher watches for the updates on the specified target. 59// 60// Deprecated: please use package resolver. 61type Watcher interface { 62 // Next blocks until an update or error happens. It may return one or more 63 // updates. The first call should get the full set of the results. It should 64 // return an error if and only if Watcher cannot recover. 65 Next() ([]*Update, error) 66 // Close closes the Watcher. 67 Close() 68} 69