if (rpcHook != null) {
rpcHook
.doBeforeRequest(RemotingHelper.parseChannelRemoteAddr(ctx.channel()), cmd);
}
final RemotingCommand response = pair.getObject1().processRequest(ctx, cmd);
if (rpcHook != null) {
rpcHook.doAfterResponse(cmd, response);
}
// Oneway形式忽略应答结果
if (!cmd.isOnewayRPC()) {
if (response != null) {
response.setOpaque(cmd.getOpaque());
response.markResponseType();
try {
ctx.writeAndFlush(response);
}
catch (Throwable e) {
plog.error("process request over, but response failed", e);
plog.error(cmd.toString());
plog.error(response.toString());
}
}
else {
// 收到请求，但是没有返回应答，可能是processRequest中进行了应答，忽略这种情况
}
}
}
catch (Throwable e) {
plog.error("process request exception", e);
plog.error(cmd.toString());
if (!cmd.isOnewayRPC()) {
final RemotingCommand response =
RemotingCommand.createResponseCommand(
RemotingSysResponseCode.SYSTEM_ERROR,//
RemotingHelper.exceptionSimpleDesc(e));
response.setOpaque(cmd.getOpaque());
ctx.writeAndFlush(response);
}
}
}
};
try {
// 这里需要做流控，要求线程池对应的队列必须是有大小限制的
pair.getObject2().submit(run);
}
catch (RejectedExecutionException e) {
plog.warn(RemotingHelper.parseChannelRemoteAddr(ctx.channel()) //
+ ", too many requests and system thread pool busy, RejectedExecutionException " //
+ pair.getObject2().toString() //
+ " request code: " + cmd.getCode());
if (!cmd.isOnewayRPC()) {
final RemotingCommand response =
RemotingCommand.createResponseCommand(RemotingSysResponseCode.SYSTEM_BUSY,
"too many requests and system thread pool busy, please try another server");
response.setOpaque(cmd.getOpaque());
ctx.writeAndFlush(response);
}
}
}
else {
String error = " request type " + cmd.getCode() + " not supported";
final RemotingCommand response =
RemotingCommand.createResponseCommand(RemotingSysResponseCode.REQUEST_CODE_NOT_SUPPORTED,
error);
response.setOpaque(cmd.getOpaque());
ctx.writeAndFlush(response);
plog.error(RemotingHelper.parseChannelRemoteAddr(ctx.channel()) + error);
}
}