Add possibility to provide version (#46)

ICCC/ICCCGetVersionReceiver.go

@@ -0,0 +1,44 @@
+package ICCC
+
+import (
+	"github.com/SommerEngineering/Ocean/ICCC/SystemMessages"
+	"github.com/SommerEngineering/Ocean/Log"
+	LM "github.com/SommerEngineering/Ocean/Log/Meta"
+	"github.com/SommerEngineering/Ocean/System/Version"
+	"github.com/SommerEngineering/Ocean/Tools"
+)
+
+// The receiver function for the ICCC version message.
+func ICCCGetVersionReceiver(data map[string][]string) (result map[string][]string) {
+
+	// Recover from errors:
+	defer func() {
+		if err := recover(); err != nil {
+			Log.LogFull(senderName, LM.CategorySYSTEM, LM.LevelERROR, LM.SeverityUnknown, LM.ImpactUnknown, LM.MessageNamePARSE, "Was not able to execute the ICCC get version message.")
+			result = make(map[string][]string, 0)
+			return
+		}
+	}()
+
+	// Converts the HTTP form data into an object:
+	_, _, obj := Data2Message(SystemMessages.ICCCGetVersion{}, data)
+
+	// Was it possible to convert the data?
+	if obj != nil {
+
+		// Prepare the answer:
+		answer := SystemMessages.ICCCGetVersionAnswer{}
+		answer.Kind = `Ocean`
+		answer.Name = Tools.ThisHostname()
+		answer.Version = Version.GetVersion()
+
+		// An answer is necessary:
+		return Message2Data("", "", answer)
+	} else {
+		Log.LogShort(senderName, LM.CategorySYSTEM, LM.LevelINFO, LM.MessageNameSTARTUP, `ICCC message: Was not able to convert the ping message.`)
+	}
+
+	// In any other error case:
+	result = make(map[string][]string, 0)
+	return
+}

ICCC/SystemMessages/ICCCGetVersion.go

@@ -0,0 +1,12 @@
+package SystemMessages
+
+// Requests the version from a Ocean server
+type ICCCGetVersion struct {
+}
+
+// Answer to the version request
+type ICCCGetVersionAnswer struct {
+	Kind    string // Ocean || Component
+	Name    string // Ocean: Hostname; Components: Name
+	Version string // The current version
+}

ICCC/SystemMessages/ICCCStartupMessages.go

@@ -4,9 +4,12 @@ package SystemMessages
 type ICCCOceanStartUpMessage struct {
 	PublicIPAddressPort string // The public web server's IP address and port
 	AdminIPAddressPort  string // The private admin server's IP address and port
+	OceanVersion        string // The current version of this server
 }
 
 // Message type for a startup message for external components:
 type ICCCComponentStartUpMessage struct {
 	IPAddressPort string // The component's ICCC IP address and port
+	Name          string // What is the name of this component?
+	Version       string // Which version is used?
 }

ICCC/Variables.go

@@ -14,6 +14,7 @@ const (
 	ChannelSHUTDOWN string = `System::Shutdown` // A channel for system shutdown messages.
 	ChannelSTARTUP  string = `System::Startup`  // A channel for system startup messages.
 	ChannelICCC     string = `System::ICCC`     // A common ICCC channel.
+	ChannelPING     string = `System::Ping`     // A channel for pings.
 )
 
 var (