| /* |
| * 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 rocketmq |
| |
| import "C" |
| import ( |
| "strconv" |
| "sync" |
| "unsafe" |
| ) |
| |
| var selectors = selectorHolder{selectors: map[int]*messageQueueSelectorWrapper{}} |
| |
| //export queueSelectorCallback |
| func queueSelectorCallback(size int, selectorKey unsafe.Pointer) int { |
| s, ok := selectors.getAndDelete(*(*int)(selectorKey)) |
| if !ok { |
| panic("BUG: not register the selector with key:" + strconv.Itoa(*(*int)(selectorKey))) |
| } |
| return s.Select(size) |
| } |
| |
| type messageQueueSelectorWrapper struct { |
| selector MessageQueueSelector |
| |
| m *Message |
| arg interface{} |
| } |
| |
| func (w *messageQueueSelectorWrapper) Select(size int) int { |
| return w.selector.Select(size, w.m, w.arg) |
| } |
| |
| // MessageQueueSelector select one message queue |
| type MessageQueueSelector interface { |
| Select(size int, m *Message, arg interface{}) int |
| } |
| |
| type selectorHolder struct { |
| sync.Mutex |
| |
| selectors map[int]*messageQueueSelectorWrapper |
| key int |
| } |
| |
| func (s *selectorHolder) put(selector *messageQueueSelectorWrapper) (key int) { |
| s.Lock() |
| key = s.key |
| s.selectors[key] = selector |
| s.key++ |
| s.Unlock() |
| return |
| } |
| |
| func (s *selectorHolder) getAndDelete(key int) (*messageQueueSelectorWrapper, bool) { |
| s.Lock() |
| selector, ok := s.selectors[key] |
| if ok { |
| delete(s.selectors, key) |
| } |
| s.Unlock() |
| |
| return selector, ok |
| } |