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https://github.com/golang/go
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statistics HTML page for rpc
R=rsc DELTA=121 (115 added, 0 deleted, 6 changed) OCL=32427 CL=32429
This commit is contained in:
Rob Pike
parent
9271c6402e
commit
75e0569b99
@ -37,6 +37,7 @@ O1=\
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O2=\
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client.$O\
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debug.$O\
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phases: a1 a2
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@ -47,7 +48,7 @@ a1: $(O1)
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rm -f $(O1)
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a2: $(O2)
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$(AR) grc _obj$D/rpc.a client.$O
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$(AR) grc _obj$D/rpc.a client.$O debug.$O
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rm -f $(O2)
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100
src/pkg/rpc/debug.go
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100
src/pkg/rpc/debug.go
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@ -0,0 +1,100 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package rpc
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/*
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Some HTML presented at http://machine:port/debug/rpc
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Lists services, their methods, and some statistics, still rudimentary.
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*/
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import (
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"fmt";
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"gob";
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"http";
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"io";
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"log";
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"os";
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"rpc";
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"sort";
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"template";
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)
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const debugText =
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`<html>
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<body>
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<title>Services</title>
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{.repeated section @}
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<hr>
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Service {name}
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<hr>
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<table>
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<th align=center>Method</th><th align=center>Calls</th>
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{.repeated section meth}
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<tr>
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<td align=left font=fixed>{name}({.section m}{argType}, {replyType}) os.Error</td>
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<td align=center>{numCalls}</td>{.end}
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</tr>
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{.end}
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</table>
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{.end}
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</body>
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</html>`
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var debug *template.Template
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type debugMethod struct {
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m *methodType;
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name string;
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}
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type methodArray []debugMethod
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type debugService struct {
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s *service;
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name string;
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meth methodArray;
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}
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type serviceArray []debugService
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func (s serviceArray) Len() int { return len(s) }
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func (s serviceArray) Less(i, j int) bool { return s[i].name < s[j].name }
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func (s serviceArray) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
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func (m methodArray) Len() int { return len(m) }
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func (m methodArray) Less(i, j int) bool { return m[i].name < m[j].name }
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func (m methodArray) Swap(i, j int) { m[i], m[j] = m[j], m[i] }
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// Runs at /debug/rpc
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func debugHTTP(c *http.Conn, req *http.Request) {
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var err os.Error;
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if debug == nil {
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debug, err = template.Parse(debugText, nil);
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if err != nil {
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fmt.Fprintln(c, "rpc can't create debug HTML template:", err.String());
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return;
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}
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}
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// Build a sorted version of the data.
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var services = make(serviceArray, len(server.serviceMap));
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i := 0;
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server.Lock();
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for sname, service := range server.serviceMap {
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services[i] = debugService{service, sname, make(methodArray, len(service.method))};
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j := 0;
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for mname, method := range service.method {
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services[i].meth[j] = debugMethod{method, mname};
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j++;
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}
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sort.Sort(services[i].meth);
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i++;
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}
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server.Unlock();
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sort.Sort(services);
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err = debug.Execute(services, c);
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if err != nil {
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fmt.Fprintln(c, "rpc: error executing template:", err.String());
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}
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}
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@ -127,9 +127,11 @@ var unusedError *os.Error;
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var typeOfOsError = reflect.Typeof(unusedError).(*reflect.PtrType).Elem()
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type methodType struct {
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sync.Mutex; // protects counters
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method reflect.Method;
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argType *reflect.PtrType;
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replyType *reflect.PtrType;
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numCalls uint;
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}
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type service struct {
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@ -157,13 +159,14 @@ type Response struct {
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}
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type serverType struct {
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sync.Mutex; // protects the serviceMap
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serviceMap map[string] *service;
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}
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// This variable is a global whose "public" methods are really private methods
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// called from the global functions of this package: rpc.Register, rpc.ServeConn, etc.
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// For example, rpc.Register() calls server.add().
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var server = &serverType{ make(map[string] *service) }
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var server = &serverType{ serviceMap: make(map[string] *service) }
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// Is this a publicly vislble - upper case - name?
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func isPublic(name string) bool {
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@ -172,6 +175,8 @@ func isPublic(name string) bool {
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}
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func (server *serverType) register(rcvr interface{}) os.Error {
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server.Lock();
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defer server.Unlock();
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if server.serviceMap == nil {
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server.serviceMap = make(map[string] *service);
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}
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@ -242,7 +247,7 @@ func (server *serverType) register(rcvr interface{}) os.Error {
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log.Stderr("method", mname, "returns", returnType.String(), "not os.Error");
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continue;
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}
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s.method[mname] = &methodType{method, argType, replyType};
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s.method[mname] = &methodType{method: method, argType: argType, replyType: replyType};
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}
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if len(s.method) == 0 {
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@ -279,7 +284,11 @@ func sendResponse(sending *sync.Mutex, req *Request, reply interface{}, enc *gob
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sending.Unlock();
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}
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func (s *service) call(sending *sync.Mutex, function *reflect.FuncValue, req *Request, argv, replyv reflect.Value, enc *gob.Encoder) {
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func (s *service) call(sending *sync.Mutex, mtype *methodType, req *Request, argv, replyv reflect.Value, enc *gob.Encoder) {
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mtype.Lock();
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mtype.numCalls++;
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mtype.Unlock();
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function := mtype.method.Func;
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// Invoke the method, providing a new value for the reply.
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returnValues := function.Call([]reflect.Value{s.rcvr, argv, replyv});
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// The return value for the method is an os.Error.
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@ -315,7 +324,9 @@ func (server *serverType) input(conn io.ReadWriteCloser) {
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continue;
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}
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// Look up the request.
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server.Lock();
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service, ok := server.serviceMap[serviceMethod[0]];
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server.Unlock();
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if !ok {
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s := "rpc: can't find service " + req.ServiceMethod;
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sendResponse(sending, req, invalidRequest, enc, s);
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@ -337,7 +348,7 @@ func (server *serverType) input(conn io.ReadWriteCloser) {
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sendResponse(sending, req, replyv.Interface(), enc, err.String());
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continue;
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}
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go service.call(sending, method.Func, req, argv, replyv, enc);
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go service.call(sending, mtype, req, argv, replyv, enc);
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}
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conn.Close();
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}
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@ -379,6 +390,7 @@ func Accept(lis net.Listener) {
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// Can connect to RPC service using HTTP CONNECT to rpcPath.
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var rpcPath string = "/_goRPC_"
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var debugPath string = "/debug/rpc"
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var connected = "200 Connected to Go RPC"
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func serveHTTP(c *http.Conn, req *http.Request) {
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@ -397,8 +409,11 @@ func serveHTTP(c *http.Conn, req *http.Request) {
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server.input(conn);
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}
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func debugHTTP(c *http.Conn, req *http.Request)
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// HandleHTTP registers an HTTP handler for RPC messages.
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// It is still necessary to invoke http.Serve(), typically in a go statement.
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func HandleHTTP() {
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http.Handle(rpcPath, http.HandlerFunc(serveHTTP));
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http.Handle(debugPath, http.HandlerFunc(debugHTTP));
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}
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