bugfix/cron-job-restarting-issue (#137)

1.) duplicate cron jobs are prevented from running (same name, function, expression)
2.) added jobid to all cron jobs
3.) Added a cron management demo script

.gitignore

@@ -1,4 +1,5 @@
 .vscode
 .DS_Store
 Manifest.toml
-test/Manifest.toml
+test/Manifest.toml
+demo/Manifest.toml

demo/Project.toml

@@ -2,5 +2,7 @@
 HTTP = "cd3eb016-35fb-5094-929b-558a96fad6f3"
 JSON3 = "0f8b85d8-7281-11e9-16c2-39a750bddbf1"
 MIMEs = "6c6e2e6c-3030-632d-7369-2d6c69616d65"
+RelocatableFolders = "05181044-ff0b-4ac5-8273-598c1e38db00"
+Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 StructTypes = "856f2bd8-1eba-4b0a-8007-ebc267875bd4"
 SwaggerMarkdown = "1b6eb727-ad4b-44eb-9669-b9596a6e760f"

demo/cronmanagementdemo.jl

@@ -0,0 +1,47 @@
+module CronManagementDemo 
+
+include("../src/Oxygen.jl")
+using .Oxygen
+using HTTP
+using Dates
+
+get("/data") do
+    Dict("msg" => "hello")
+end
+
+function logtime()
+    @info "current time: $(now())"
+end
+
+# initialize the app with an already running cron job
+@cron "*" logtime
+
+get("/register") do
+    @info "registering new job"
+    @cron "*/2" logtime
+    "registered jobs"
+end
+
+get("/start") do
+    @info "/start POST endpoint hit; running job"
+    startcronjobs()
+    "started jobs"
+end
+
+get("/clear") do 
+    @info "clearing jobs"
+    clearcronjobs()
+    "cleared jobs"
+end
+
+get("/stop") do
+    @info "/stop POST endpoint hit"
+    stopcronjobs()
+    "stopped jobs"
+end
+
+@info "Starting server"
+serve()
+@info "Server stopped"
+
+end

src/Oxygen.jl

@@ -14,7 +14,7 @@ export @get, @post, @put, @patch, @delete, @route, @cron,
         redirect, queryparams, binary, text, json, html, file, 
         configdocs, mergeschema, setschema, getschema, router,
         enabledocs, disabledocs, isdocsenabled, starttasks, stoptasks,
-        resetstate, startcronjobs, stopcronjobs
+        resetstate, startcronjobs, stopcronjobs, clearcronjobs
 
 # Load any optional extensions
 include("extensions/load.jl");

src/autodoc.jl

@@ -10,7 +10,7 @@ export registerschema, docspath, schemapath, getschema,
     swaggerhtml, redochtml, getschemapath, configdocs, mergeschema, setschema, 
     router, enabledocs, disabledocs, isdocsenabled, registermountedfolder, 
     getrepeatasks, hasmiddleware, compose, resetstatevariables,
-    @cron, stopcronjobs, startcronjobs, getcronjobs, resetcronstate
+    @cron, stopcronjobs, startcronjobs, getcronjobs, clearcronjobs, resetcronstate
 
 const SWAGGER_VERSION = "[email protected]"
 const REDOC_VERSION = "[email protected]"

src/core.jl

@@ -16,7 +16,8 @@ export @get, @post, @put, @patch, @delete, @route, @cron,
         start, serve, serveparallel, terminate, internalrequest, file,
         configdocs, mergeschema, setschema, getschema, router,
         enabledocs, disabledocs, isdocsenabled, registermountedfolder,
-        starttasks, stoptasks, resetstate, startcronjobs, stopcronjobs
+        starttasks, stoptasks, resetstate, startcronjobs, stopcronjobs, 
+        clearcronjobs
 
 global const ROUTER = Ref{HTTP.Handlers.Router}(HTTP.Router())
 global const server = Ref{Union{HTTP.Server, Nothing}}(nothing)