/**
* 读取响应
*
* @param context 上下文
* @param requestId 请求ID
* @param timeOut 超时
* @return 命令响应
*/
public CommandResponse read(Context context, int requestId, int timeOut) {
ByteBuffer response = null;
CommandResponse commandResponse = null;
CommandResponse tempResponse = new CommandResponse();
synchronized (context.getReadLock()) {
// --直到超时用完，一直读取响应
while (timeOut > 0) {
response = context.getReceivedMessageQueue().poll();
// --队列中没有响应时，等待响应
if (response == null) {
try {
long before = System.currentTimeMillis();
context.getReadLock().wait(timeOut);
// 更新超时
timeOut -= (int) (System.currentTimeMillis() - before);
} catch (InterruptedException e) {
break;
}
} else {
tempResponse.decode(response);
// --如果当前响应的ID和请求ID一致，则当前响应就是要读取的响应
if (tempResponse.getId() == requestId) {
commandResponse = tempResponse;
break;
}
}
}
}
return commandResponse;
}
