plugins/sql/entry/instance_open.go (32 lines of code) (raw):
// Licensed to 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. Apache Software Foundation (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 entry
import (
"database/sql"
"github.com/apache/skywalking-go/plugins/core/operator"
"github.com/apache/skywalking-go/plugins/core/tracing"
)
var needInfoKey = "needInfo"
var infoKey = "info"
type InstanceInterceptor struct {
}
type InstanceInfo interface {
Peer() string
ComponentID() int32
DBType() string
}
func (n *InstanceInterceptor) BeforeInvoke(invocation operator.Invocation) error {
tracing.SetRuntimeContextValue(needInfoKey, true)
return nil
}
func (n *InstanceInterceptor) AfterInvoke(invocation operator.Invocation, results ...interface{}) error {
tracing.SetRuntimeContextValue(needInfoKey, nil)
info, ok := tracing.GetRuntimeContextValue(infoKey).(InstanceInfo)
tracing.SetRuntimeContextValue(needInfoKey, nil)
tracing.SetRuntimeContextValue(infoKey, nil)
if !ok || info == nil {
return nil
}
// adding peer address into db
if db, ok := results[0].(*sql.DB); ok && db != nil {
results[0].(operator.EnhancedInstance).SetSkyWalkingDynamicField(info)
}
return nil
}