| // 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 plugins - registers plugins with the service |
| */ |
| package plugins |
| |
| import ( |
| "github.com/apache/incubator-milagro-dta/pkg/defaultservice" |
| "github.com/apache/incubator-milagro-dta/pkg/service" |
| ) |
| |
| var plugins []Plugin |
| |
| // Plugin is the main plugin interface |
| type Plugin interface { |
| Name() string |
| Vendor() string |
| } |
| |
| // ServicePlugin interface |
| type ServicePlugin interface { |
| defaultservice.Plugable |
| service.Service |
| service.Endpoints |
| |
| Init(plugin defaultservice.Plugable, options ...defaultservice.ServiceOption) error |
| } |
| |
| func registerPlugin(p Plugin) { |
| plugins = append(plugins, p) |
| } |
| |
| // FindServicePlugin returns a registered ServicePlugin by name |
| // Returns nil if the plugin is not loaded |
| func FindServicePlugin(name string) ServicePlugin { |
| |
| for _, p := range plugins { |
| sp, ok := p.(ServicePlugin) |
| if !ok { |
| continue |
| } |
| |
| if sp.Name() == name { |
| return sp |
| } |
| } |
| |
| return nil |
| } |