Metrics2: Store a registry of Counters

go/trace/service/impl.go

 package traceservice
 
 // Generate the go code from the protocol buffer definitions.
 //go:generate protoc --go_out=plugins=grpc:. traceservice.proto
 
 import (
         "bytes"
         "crypto/md5"
         "encoding/binary"
         "fmt"
@@ skipping 13 matching lines @@
         TRACE_BUCKET_NAME   = "traces"
         TRACEID_BUCKET_NAME = "traceids"
         LARGEST_TRACEID_KEY = "the largest trace64id"
 
         // How many items to keep in the in-memory LRU cache.
         MAX_INT64_ID_CACHED = 1024 * 1024
 )
 
 var (
         tags               = map[string]string{"module": "tracedb"}
-        missingParamsCalls = metrics2.NewCounter("missing-params-calls", tags)
-        addParamsCalls     = metrics2.NewCounter("add-params-calls", tags)
-        addCalls           = metrics2.NewCounter("add-calls", tags)
-        addCount           = metrics2.NewCounter("added-count", tags)
-        removeCalls        = metrics2.NewCounter("remove-calls", tags)
-        listCalls          = metrics2.NewCounter("list-calls", tags)
-        listMD5Calls       = metrics2.NewCounter("list-md5-calls", tags)
-        getParamsCalls     = metrics2.NewCounter("get-params-calls", tags)
-        getValuesCalls     = metrics2.NewCounter("get-values-calls", tags)
-        getValuesRawCalls  = metrics2.NewCounter("get-values-raw-calls", tags)
-        getTraceIDsCalls   = metrics2.NewCounter("get-traceids-calls", tags)
-        pingCalls          = metrics2.NewCounter("ping-calls", tags)
+        missingParamsCalls = metrics2.GetCounter("missing-params-calls", tags)
+        addParamsCalls     = metrics2.GetCounter("add-params-calls", tags)
+        addCalls           = metrics2.GetCounter("add-calls", tags)
+        addCount           = metrics2.GetCounter("added-count", tags)
+        removeCalls        = metrics2.GetCounter("remove-calls", tags)
+        listCalls          = metrics2.GetCounter("list-calls", tags)
+        listMD5Calls       = metrics2.GetCounter("list-md5-calls", tags)
+        getParamsCalls     = metrics2.GetCounter("get-params-calls", tags)
+        getValuesCalls     = metrics2.GetCounter("get-values-calls", tags)
+        getValuesRawCalls  = metrics2.GetCounter("get-values-raw-calls", tags)
+        getTraceIDsCalls   = metrics2.GetCounter("get-traceids-calls", tags)
+        pingCalls          = metrics2.GetCounter("ping-calls", tags)
 )
 
 // bytesFromUint64 converts a uint64 to a []byte.
 func bytesFromUint64(u uint64) []byte {
         ret := make([]byte, 8, 8)
         binary.LittleEndian.PutUint64(ret, u)
         return ret
 }
 
 // CommitIDToByes serializes the CommitID to a []byte in the same format that CommitIDFromBytes reads.
@@ skipping 643 matching lines @@
 func (ts *TraceServiceImpl) Ping(ctx context.Context, empty *Empty) (*Empty, error) {
         pingCalls.Inc(1)
 
         return &Empty{}, nil
 }
 
 // Close closes the underlying datastore. Not part of the TraceServiceServer interface.
 func (ts *TraceServiceImpl) Close() error {
         return ts.db.Close()
 }