Added webapp Dashboard + logic to interact with server.

[src/xds/xds-agent.git] / lib / agent / agent.go

diff --git a/lib/agent/agent.go b/lib/agent/agent.go
index 74872f7..29b0622 100644 (file)
--- a/lib/agent/agent.go
+++ b/lib/agent/agent.go
@@ -2,18 +2,22 @@ package agent
 
 import (
        "fmt"
+       "log"
        "os"
        "os/exec"
        "os/signal"
+       "path/filepath"
        "syscall"
+       "time"
 
        "github.com/Sirupsen/logrus"
        "github.com/codegangsta/cli"
        "github.com/iotbzh/xds-agent/lib/syncthing"
        "github.com/iotbzh/xds-agent/lib/xdsconfig"
-       "github.com/iotbzh/xds-agent/lib/webserver"
 )
 
+const cookieMaxAge = "3600"
+
 // Context holds the Agent context structure
 type Context struct {
        ProgName    string
@@ -22,8 +26,14 @@ type Context struct {
        SThg        *st.SyncThing
        SThgCmd     *exec.Cmd
        SThgInotCmd *exec.Cmd
-       WWWServer   *webserver.ServerService
-       Exit        chan os.Signal
+
+       webServer     *WebServer
+       xdsServers map[string]*XdsServer
+       sessions      *Sessions
+       events        *Events
+       projects      *Projects
+
+       Exit chan os.Signal
 }
 
 // NewAgent Create a new instance of Agent
@@ -48,6 +58,10 @@ func NewAgent(cliCtx *cli.Context) *Context {
                ProgName: cliCtx.App.Name,
                Log:      log,
                Exit:     make(chan os.Signal, 1),
+
+               webServer:     nil,
+               xdsServers: make(map[string]*XdsServer),
+               events:        nil,
        }
 
        // register handler on SIGTERM / exit
@@ -57,6 +71,114 @@ func NewAgent(cliCtx *cli.Context) *Context {
        return &ctx
 }
 
+// Run Main function called to run agent
+func (ctx *Context) Run() (int, error) {
+       var err error
+
+       // Logs redirected into a file when logfile option or logsDir config is set
+       ctx.Config.LogVerboseOut = os.Stderr
+       if ctx.Config.FileConf.LogsDir != "" {
+               if ctx.Config.Options.LogFile != "stdout" {
+                       logFile := ctx.Config.Options.LogFile
+
+                       fdL, err := os.OpenFile(logFile, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0666)
+                       if err != nil {
+                               msgErr := fmt.Errorf("Cannot create log file %s", logFile)
+                               return int(syscall.EPERM), msgErr
+                       }
+                       ctx.Log.Out = fdL
+
+                       ctx._logPrint("Logging file: %s\n", logFile)
+               }
+
+               logFileHTTPReq := filepath.Join(ctx.Config.FileConf.LogsDir, "xds-agent-verbose.log")
+               fdLH, err := os.OpenFile(logFileHTTPReq, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0666)
+               if err != nil {
+                       msgErr := fmt.Errorf("Cannot create log file %s", logFileHTTPReq)
+                       return int(syscall.EPERM), msgErr
+               }
+               ctx.Config.LogVerboseOut = fdLH
+
+               ctx._logPrint("Logging file for HTTP requests: %s\n", logFileHTTPReq)
+       }
+
+       // Create syncthing instance when section "syncthing" is present in config.json
+       if ctx.Config.FileConf.SThgConf != nil {
+               ctx.SThg = st.NewSyncThing(ctx.Config, ctx.Log)
+       }
+
+       // Start local instance of Syncthing and Syncthing-notify
+       if ctx.SThg != nil {
+               ctx.Log.Infof("Starting Syncthing...")
+               ctx.SThgCmd, err = ctx.SThg.Start()
+               if err != nil {
+                       return 2, err
+               }
+               fmt.Printf("Syncthing started (PID %d)\n", ctx.SThgCmd.Process.Pid)
+
+               ctx.Log.Infof("Starting Syncthing-inotify...")
+               ctx.SThgInotCmd, err = ctx.SThg.StartInotify()
+               if err != nil {
+                       return 2, err
+               }
+               fmt.Printf("Syncthing-inotify started (PID %d)\n", ctx.SThgInotCmd.Process.Pid)
+
+               // Establish connection with local Syncthing (retry if connection fail)
+               time.Sleep(3 * time.Second)
+               maxRetry := 30
+               retry := maxRetry
+               for retry > 0 {
+                       if err := ctx.SThg.Connect(); err == nil {
+                               break
+                       }
+                       ctx.Log.Infof("Establishing connection to Syncthing (retry %d/%d)", retry, maxRetry)
+                       time.Sleep(time.Second)
+                       retry--
+               }
+               if err != nil || retry == 0 {
+                       return 2, err
+               }
+
+               // Retrieve Syncthing config
+               id, err := ctx.SThg.IDGet()
+               if err != nil {
+                       return 2, err
+               }
+               ctx.Log.Infof("Local Syncthing ID: %s", id)
+
+       } else {
+               ctx.Log.Infof("Cloud Sync / Syncthing not supported")
+       }
+
+       // Create Web Server
+       ctx.webServer = NewWebServer(ctx)
+
+       // Sessions manager
+       ctx.sessions = NewClientSessions(ctx, cookieMaxAge)
+
+       // Create events management
+       ctx.events = NewEvents(ctx)
+
+       // Create projects management
+       ctx.projects = NewProjects(ctx, ctx.SThg)
+
+       // Run Web Server until exit requested (blocking call)
+       if err = ctx.webServer.Serve(); err != nil {
+               log.Println(err)
+               return 3, err
+       }
+
+       return 4, fmt.Errorf("Program exited")
+}
+
+// Helper function to log message on both stdout and logger
+func (ctx *Context) _logPrint(format string, args ...interface{}) {
+       fmt.Printf(format, args...)
+       if ctx.Log.Out != os.Stdout {
+               ctx.Log.Infof(format, args...)
+       }
+}
+
 // Handle exit and properly stop/close all stuff
 func handlerSigTerm(ctx *Context) {
        <-ctx.Exit
@@ -68,9 +190,9 @@ func handlerSigTerm(ctx *Context) {
                ctx.SThg.Stop()
                ctx.SThg.StopInotify()
        }
-       if ctx.WWWServer != nil {
+       if ctx.webServer != nil {
                ctx.Log.Infof("Stoping Web server...")
-               ctx.WWWServer.Stop()
+               ctx.webServer.Stop()
        }
        os.Exit(1)
 }