dubbo.apache.org/dubbo-go/v3@v3.1.1/filter/active/filter.go (about)

     1  /*
     2   * Licensed to the Apache Software Foundation (ASF) under one or more
     3   * contributor license agreements.  See the NOTICE file distributed with
     4   * this work for additional information regarding copyright ownership.
     5   * The ASF licenses this file to You under the Apache License, Version 2.0
     6   * (the "License"); you may not use this file except in compliance with
     7   * the License.  You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  package active
    19  
    20  import (
    21  	"context"
    22  	"strconv"
    23  	"sync"
    24  )
    25  
    26  import (
    27  	"github.com/dubbogo/gost/log/logger"
    28  )
    29  
    30  import (
    31  	"dubbo.apache.org/dubbo-go/v3/common/constant"
    32  	"dubbo.apache.org/dubbo-go/v3/common/extension"
    33  	"dubbo.apache.org/dubbo-go/v3/filter"
    34  	"dubbo.apache.org/dubbo-go/v3/protocol"
    35  	invocation2 "dubbo.apache.org/dubbo-go/v3/protocol/invocation"
    36  )
    37  
    38  const (
    39  	dubboInvokeStartTime = "dubboInvokeStartTime"
    40  )
    41  
    42  var (
    43  	once   sync.Once
    44  	active *activeFilter
    45  )
    46  
    47  func init() {
    48  	extension.SetFilter(constant.ActiveFilterKey, newActiveFilter)
    49  }
    50  
    51  // Filter tracks the requests status
    52  type activeFilter struct{}
    53  
    54  func newActiveFilter() filter.Filter {
    55  	if active == nil {
    56  		once.Do(func() {
    57  			active = &activeFilter{}
    58  		})
    59  	}
    60  	return active
    61  }
    62  
    63  // Invoke starts to record the requests status
    64  func (f *activeFilter) Invoke(ctx context.Context, invoker protocol.Invoker, invocation protocol.Invocation) protocol.Result {
    65  	invocation.(*invocation2.RPCInvocation).SetAttachment(dubboInvokeStartTime, strconv.FormatInt(protocol.CurrentTimeMillis(), 10))
    66  	protocol.BeginCount(invoker.GetURL(), invocation.MethodName())
    67  	return invoker.Invoke(ctx, invocation)
    68  }
    69  
    70  // OnResponse update the active count base on the request result.
    71  func (f *activeFilter) OnResponse(ctx context.Context, result protocol.Result, invoker protocol.Invoker, invocation protocol.Invocation) protocol.Result {
    72  	startTime, err := strconv.ParseInt(invocation.(*invocation2.RPCInvocation).GetAttachmentWithDefaultValue(dubboInvokeStartTime, "0"), 10, 64)
    73  	if err != nil {
    74  		result.SetError(err)
    75  		logger.Errorf("parse dubbo_invoke_start_time to int64 failed")
    76  		return result
    77  	}
    78  	elapsed := protocol.CurrentTimeMillis() - startTime
    79  	protocol.EndCount(invoker.GetURL(), invocation.MethodName(), elapsed, result.Error() == nil)
    80  	return result
    81  }