| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package protocol |
| |
| import ( |
| "fmt" |
| ) |
| |
| // Result is a interface that represents RPC result |
| // |
| // SetError method sets error. |
| // |
| // Error method gets error. |
| // |
| // SetResult method sets invoker result. |
| // |
| // Result method gets invoker result. |
| // |
| // SetAttachments method replaces the existing attachments with the specified param. |
| // |
| // Attachments method gets all attachments |
| // |
| // AddAttachment method adds the specified map to existing attachments in this instance. |
| // |
| // Attachment method gets attachment by key with default value. |
| type Result interface { |
| SetError(error) |
| Error() error |
| SetResult(interface{}) |
| Result() interface{} |
| SetAttachments(map[string]interface{}) |
| Attachments() map[string]interface{} |
| AddAttachment(string, interface{}) |
| Attachment(string, interface{}) interface{} |
| } |
| |
| var _ Result = (*RPCResult)(nil) |
| |
| // RPCResult is default RPC result. |
| type RPCResult struct { |
| Attrs map[string]interface{} |
| Err error |
| Rest interface{} |
| } |
| |
| // SetError sets error. |
| func (r *RPCResult) SetError(err error) { |
| r.Err = err |
| } |
| |
| // Error gets error. |
| func (r *RPCResult) Error() error { |
| return r.Err |
| } |
| |
| // SetResult sets invoker result. |
| func (r *RPCResult) SetResult(rest interface{}) { |
| r.Rest = rest |
| } |
| |
| // Result gets invoker result. |
| func (r *RPCResult) Result() interface{} { |
| return r.Rest |
| } |
| |
| // SetAttachments replaces the existing attachments with the specified param. |
| func (r *RPCResult) SetAttachments(attr map[string]interface{}) { |
| r.Attrs = attr |
| } |
| |
| // Attachments gets all attachments |
| func (r *RPCResult) Attachments() map[string]interface{} { |
| if r.Attrs == nil { |
| r.Attrs = make(map[string]interface{}) |
| } |
| return r.Attrs |
| } |
| |
| // AddAttachment adds the specified map to existing attachments in this instance. |
| func (r *RPCResult) AddAttachment(key string, value interface{}) { |
| if r.Attrs == nil { |
| r.Attrs = make(map[string]interface{}) |
| } |
| r.Attrs[key] = value |
| } |
| |
| // Attachment gets attachment by key with default value. |
| func (r *RPCResult) Attachment(key string, defaultValue interface{}) interface{} { |
| if r.Attrs == nil { |
| r.Attrs = make(map[string]interface{}) |
| return nil |
| } |
| v, ok := r.Attrs[key] |
| if !ok { |
| v = defaultValue |
| } |
| return v |
| } |
| |
| func (r *RPCResult) String() string { |
| return fmt.Sprintf("&RPCResult{Rest: %v, Attrs: %v, Err: %v}", r.Rest, r.Attrs, r.Err) |
| } |