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dubbo_transaction_filter.go
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dubbo_transaction_filter.go
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/*
* 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 dubbo
import (
"context"
"strings"
"sync"
"dubbo.apache.org/dubbo-go/v3/common/extension"
"dubbo.apache.org/dubbo-go/v3/filter"
"dubbo.apache.org/dubbo-go/v3/protocol"
"github.com/seata/seata-go/pkg/constant"
"github.com/seata/seata-go/pkg/tm"
"github.com/seata/seata-go/pkg/util/log"
)
var (
seataFilter *dubboTransactionFilter
once sync.Once
)
func InitSeataDubbo() {
extension.SetFilter(constant.SeataFilterKey, GetDubboTransactionFilter)
}
type Filter interface{}
type dubboTransactionFilter struct{}
func GetDubboTransactionFilter() filter.Filter {
if seataFilter == nil {
once.Do(func() {
seataFilter = &dubboTransactionFilter{}
})
}
return seataFilter
}
func (d *dubboTransactionFilter) Invoke(ctx context.Context, invoker protocol.Invoker, invocation protocol.Invocation) protocol.Result {
xid := tm.GetXID(ctx)
rpcXid := d.getRpcXid(invocation)
log.Infof("xid in context is %s, xid in RpcContextis %s", xid, rpcXid)
if xid != "" {
// dubbo go
invocation.SetAttachment(constant.SeataXidKey, xid)
// dubbo java
invocation.SetAttachment(constant.XidKey, xid)
} else if rpcXid != xid {
ctx = tm.InitSeataContext(ctx)
tm.SetXID(ctx, rpcXid)
}
return invoker.Invoke(ctx, invocation)
// todo why should unbind xid???
}
func (*dubboTransactionFilter) OnResponse(ctx context.Context, result protocol.Result, invoker protocol.Invoker, invocation protocol.Invocation) protocol.Result {
return result
}
func (d *dubboTransactionFilter) getRpcXid(invocation protocol.Invocation) string {
rpcXid := d.getDubboGoRpcXid(invocation)
if rpcXid == "" {
rpcXid = d.getDubboJavaRpcXid(invocation)
}
return rpcXid
}
func (*dubboTransactionFilter) getDubboGoRpcXid(invocation protocol.Invocation) string {
rpcXid := invocation.GetAttachmentWithDefaultValue(constant.SeataXidKey, "")
if rpcXid == "" {
rpcXid = invocation.GetAttachmentWithDefaultValue(strings.ToLower(constant.SeataXidKey), "")
}
return rpcXid
}
func (*dubboTransactionFilter) getDubboJavaRpcXid(invocation protocol.Invocation) string {
rpcXid := invocation.GetAttachmentWithDefaultValue(constant.XidKey, "")
if rpcXid == "" {
rpcXid = invocation.GetAttachmentWithDefaultValue(strings.ToLower(constant.XidKey), "")
}
return rpcXid
}