// Reload the network from a file
func Reload(arch string) string {
root := ""
g := graphjson.ReadArch(arch)
archaius.Conf.Population = 0 // just to make sure
// count how many nodes there are
for _, element := range g.Graph {
if element.Node != "" {
archaius.Conf.Population++
}
}
CreateChannels()
CreateEureka()
// eureka and edda aren't recorded in the json file to simplify the graph
// Start all the services
cass := make(map[string]chan gotocol.Message) // for token distribution
for _, element := range g.Graph {
if element.Node != "" {
name := element.Node
StartNode(name, "")
if names.Package(name) == DenominatorPkg {
root = name
}
if names.Package(name) == "priamCassandra" {
cass[name] = noodles[name] // remember the nodes
}
}
}
if len(cass) > 0 { // currently doesn't handle multiple priamCassandra per arch
priamCassandra.Distribute(cass) // returns a string if it needs logging
}
// Make all the connections
for _, element := range g.Graph {
if element.Edge != "" && element.Source != "" && element.Target != "" {
Connect(element.Source, element.Target)
}
}
// run for a while
if root == "" {
log.Fatal("No denominator root microservice specified")
}
return root
}
// Create a tier and specify any dependencies, return the full name of the last node created
func Create(servicename, packagename string, regions, count int, dependencies ...string) string {
var name string
arch := archaius.Conf.Arch
rnames := archaius.Conf.RegionNames
znames := archaius.Conf.ZoneNames
if regions == 0 { // for dns that isn't in a region or zone
//log.Printf("Create cross region: " + servicename)
name = names.Make(arch, "*", "*", servicename, packagename, 0)
StartNode(name, dependencies...)
}
for r := 0; r < regions; r++ {
if count == 0 { // for AWS services that are cross zone like elb and S3
//log.Printf("Create cross zone: " + servicename)
name = names.Make(arch, rnames[r], "*", servicename, packagename, 0)
StartNode(name, dependencies...)
} else {
//log.Printf("Create service: " + servicename)
cass := make(map[string]mapchan) // for token distribution
for i := r * count; i < (r+1)*count; i++ {
name = names.Make(arch, rnames[r], znames[i%3], servicename, packagename, i)
//log.Println(dependencies)
StartNode(name, dependencies...)
if packagename == "priamCassandra" {
rz := names.RegionZone(name)
if cass[rz] == nil {
cass[rz] = make(mapchan)
}
cass[rz][name] = noodles[name] // remember the nodes
}
}
if packagename == "priamCassandra" {
// split by zone
for _, v := range cass {
priamCassandra.Distribute(v) // returns a string if it needs logging
}
}
}
}
return name
}