Instantiation and termination of a given context implementation.

Issue-ID: MULTICLOUD-1005
Signed-off-by: Manjunath Ranganathaiah <manjunath.ranganathaiah@intel.com>
Change-Id: I60e11aaad97b60efc24a02866dc0e580507e5296

1 files changed, 547 insertions, 0 deletions

diff --git a/src/rsync/pkg/context/context.go b/src/rsync/pkg/context/context.go
new file mode 100644
index 00000000..67e589c9
--- /dev/null
+++ b/src/rsync/pkg/context/context.go
@@ -0,0 +1,547 @@
+/*
+ * Copyright 2020 Intel Corporation, Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package context
+
+import (
+	"encoding/json"
+        "fmt"
+        "log"
+        "os"
+        "sync"
+        "strings"
+        "github.com/onap/multicloud-k8s/src/orchestrator/pkg/appcontext"
+        pkgerrors "github.com/pkg/errors"
+        res "github.com/onap/multicloud-k8s/src/rsync/pkg/resource"
+        con "github.com/onap/multicloud-k8s/src/rsync/pkg/connector"
+        "github.com/onap/multicloud-k8s/src/rsync/pkg/app"
+)
+
+type CompositeAppContext struct {
+	cid    interface{}
+	appsorder      string
+	appsdependency string
+	appsmap []instMap
+}
+type clusterInfo struct {
+	name   string
+	resorder      string
+	resdependency string
+	ressmap []instMap
+}
+type instMap struct {
+	name    string
+	depinfo string
+	status  string
+	rerr    error
+	clusters []clusterInfo
+}
+
+const basePath string = "/tmp/rsync/"
+
+func getInstMap(order string, dependency string, level string) ([]instMap, error) {
+
+        if order == "" {
+              return nil, pkgerrors.Errorf("Not a valid order value")
+        }
+        if dependency == "" {
+              return nil, pkgerrors.Errorf("Not a valid dependency value")
+        }
+
+        if !(level == "app" || level == "res") {
+              return nil, pkgerrors.Errorf("Not a valid level name given to create map")
+        }
+
+
+        var aov map[string]interface{}
+        json.Unmarshal([]byte(order), &aov)
+
+        s := fmt.Sprintf("%vorder", level)
+        appso := aov[s].([]interface{})
+        var instmap = make([]instMap, len(appso))
+
+        var adv map[string]interface{}
+        json.Unmarshal([]byte(dependency), &adv)
+        s = fmt.Sprintf("%vdependency", level)
+        appsd := adv[s].(map[string]interface{})
+        for i, u := range appso {
+                instmap[i] = instMap{u.(string), appsd[u.(string)].(string), "none", nil, nil}
+        }
+
+        return instmap, nil
+}
+
+func deleteResource(clustername string, resname string, respath string) error {
+	k8sClient := app.KubernetesClient{}
+	err := k8sClient.Init(clustername, resname)
+	if err != nil {
+		log.Println("Init failed: " + err.Error())
+		return err
+	}
+
+	var c con.KubernetesConnector
+	c = &k8sClient
+	var gp res.Resource
+	err = gp.Delete(respath, resname, "default", c)
+	if err != nil {
+		log.Println("Delete resource failed: " +  err.Error())
+		return err
+	}
+	log.Println("Resource succesfully deleted")
+	return nil
+
+}
+
+func createResource(clustername string, resname string, respath string) error {
+	k8sClient := app.KubernetesClient{}
+	err := k8sClient.Init(clustername, resname)
+	if err != nil {
+		log.Println("Client init failed: " + err.Error())
+		return err
+	}
+
+	var c con.KubernetesConnector
+	c = &k8sClient
+	var gp res.Resource
+	_, err = gp.Create(respath,"default", c)
+	if err != nil {
+		log.Println("Create failed: " +  err.Error())
+		return err
+	}
+	log.Println("Resource succesfully created")
+	return nil
+
+}
+
+func terminateResource(ac appcontext.AppContext, resmap instMap, appname string, clustername string) error {
+	var resPath string = basePath + appname + "/" + clustername + "/resources/"
+	rh, err := ac.GetResourceHandle(appname, clustername, resmap.name)
+	if err != nil {
+		return err
+	}
+
+	resval, err := ac.GetValue(rh)
+	if err != nil {
+		return err
+	}
+
+	if resval != "" {
+		if _, err := os.Stat(resPath); os.IsNotExist(err) {
+			err = os.MkdirAll(resPath, 0755)
+			if err != nil {
+				return err
+			}
+		}
+		resPath := resPath + resmap.name + ".yaml"
+		f, err := os.Create(resPath)
+		defer f.Close()
+		if err != nil {
+			return err
+		}
+		_, err = f.WriteString(resval.(string))
+		if err != nil {
+			return err
+		}
+		result := strings.Split(resmap.name, "+")
+		if result[0] == "" {
+			return pkgerrors.Errorf("Resource name is nil")
+		}
+		err = deleteResource(clustername, result[0], resPath)
+		if err != nil {
+			return err
+		}
+		//defer os.Remove(resPath)
+	} else {
+		return pkgerrors.Errorf("Resource value is nil")
+	}
+
+	return nil
+
+}
+
+func instantiateResource(ac appcontext.AppContext, resmap instMap, appname string, clustername string) error {
+	var resPath string = basePath + appname + "/" + clustername + "/resources/"
+	rh, err := ac.GetResourceHandle(appname, clustername, resmap.name)
+	if err != nil {
+		return err
+	}
+
+	resval, err := ac.GetValue(rh)
+	if err != nil {
+		return err
+	}
+
+	if resval != "" {
+		if _, err := os.Stat(resPath); os.IsNotExist(err) {
+			err = os.MkdirAll(resPath, 0755)
+			if err != nil {
+				return err
+			}
+		}
+		resPath := resPath + resmap.name + ".yaml"
+		f, err := os.Create(resPath)
+		defer f.Close()
+		if err != nil {
+			return err
+		}
+		_, err = f.WriteString(resval.(string))
+		if err != nil {
+			return err
+		}
+		result := strings.Split(resmap.name, "+")
+		if result[0] == "" {
+			return pkgerrors.Errorf("Resource name is nil")
+		}
+		err = createResource(clustername, result[0], resPath)
+		if err != nil {
+			return err
+		}
+		//defer os.Remove(resPath)
+	} else {
+		return pkgerrors.Errorf("Resource value is nil")
+	}
+
+	return nil
+
+}
+
+func  terminateResources(ac appcontext.AppContext, ressmap []instMap, appname string, clustername string) error {
+        var wg sync.WaitGroup
+        var chans = make([]chan int, len(ressmap))
+        for l := range chans {
+                chans[l] = make(chan int)
+        }
+        for i:=0; i<len(ressmap); i++ {
+                wg.Add(1)
+                go func(index int) {
+                        if ressmap[index].depinfo == "go" {
+                                ressmap[index].status = "start"
+                        } else {
+                                ressmap[index].status = "waiting"
+                                c := <- chans[index]
+                                if c != index {
+					ressmap[index].status = "error"
+                                        ressmap[index].rerr = pkgerrors.Errorf("channel does not match")
+					wg.Done()
+					return
+                                }
+                                ressmap[index].status = "start"
+                        }
+                        ressmap[index].rerr = terminateResource(ac, ressmap[index], appname, clustername)
+                        ressmap[index].status = "done"
+                        waitstr := fmt.Sprintf("wait on %v",ressmap[index].name)
+                        for j:=0; j<len(ressmap); j++ {
+                                if ressmap[j].depinfo == waitstr {
+                                        chans[j] <- j
+                                }
+                        }
+                        wg.Done()
+                }(i)
+        }
+        wg.Wait()
+        for k:=0; k<len(ressmap); k++ {
+                if ressmap[k].rerr != nil {
+                        return pkgerrors.Errorf("error during resources termination")
+                }
+        }
+        return nil
+
+}
+
+func  instantiateResources(ac appcontext.AppContext, ressmap []instMap, appname string, clustername string) error {
+        var wg sync.WaitGroup
+        var chans = make([]chan int, len(ressmap))
+        for l := range chans {
+                chans[l] = make(chan int)
+        }
+        for i:=0; i<len(ressmap); i++ {
+                wg.Add(1)
+                go func(index int) {
+                        if ressmap[index].depinfo == "go" {
+                                ressmap[index].status = "start"
+                        } else {
+                                ressmap[index].status = "waiting"
+                                c := <- chans[index]
+                                if c != index {
+					ressmap[index].status = "error"
+                                        ressmap[index].rerr = pkgerrors.Errorf("channel does not match")
+					wg.Done()
+					return
+                                }
+                                ressmap[index].status = "start"
+                        }
+                        ressmap[index].rerr = instantiateResource(ac, ressmap[index], appname, clustername)
+                        ressmap[index].status = "done"
+                        waitstr := fmt.Sprintf("wait on %v",ressmap[index].name)
+                        for j:=0; j<len(ressmap); j++ {
+                                if ressmap[j].depinfo == waitstr {
+                                        chans[j] <- j
+                                }
+                        }
+                        wg.Done()
+                }(i)
+        }
+        wg.Wait()
+        for k:=0; k<len(ressmap); k++ {
+                if ressmap[k].rerr != nil {
+                        return pkgerrors.Errorf("error during resources instantiation")
+                }
+        }
+        return nil
+
+}
+
+func terminateApp(ac appcontext.AppContext, appmap instMap) error {
+
+        for i:=0; i<len(appmap.clusters); i++ {
+		err := terminateResources(ac, appmap.clusters[i].ressmap, appmap.name,
+				appmap.clusters[i].name)
+		if err != nil {
+			return err
+		}
+	}
+	log.Println("Termination of app done: " + appmap.name)
+
+	return nil
+
+}
+
+
+func instantiateApp(ac appcontext.AppContext, appmap instMap) error {
+
+        for i:=0; i<len(appmap.clusters); i++ {
+		err := instantiateResources(ac, appmap.clusters[i].ressmap, appmap.name,
+				appmap.clusters[i].name)
+		if err != nil {
+			return err
+		}
+	}
+	log.Println("Instantiation of app done: " + appmap.name)
+	return nil
+
+}
+
+func  instantiateApps(ac appcontext.AppContext, appsmap []instMap) error {
+	var wg sync.WaitGroup
+	var chans = make([]chan int, len(appsmap))
+	for l := range chans {
+		chans[l] = make(chan int)
+	}
+        for i:=0; i<len(appsmap); i++ {
+		wg.Add(1)
+                go func(index int) {
+                        if appsmap[index].depinfo == "go" {
+				appsmap[index].status = "start"
+			} else {
+				appsmap[index].status = "waiting"
+				c := <- chans[index]
+				if c != index {
+					appsmap[index].status = "error"
+                                        appsmap[index].rerr = pkgerrors.Errorf("channel does not match")
+					wg.Done()
+					return
+				}
+				appsmap[index].status = "start"
+			}
+			appsmap[index].rerr = instantiateApp(ac, appsmap[index])
+			appsmap[index].status = "done"
+			waitstr := fmt.Sprintf("wait on %v",appsmap[index].name)
+			for j:=0; j<len(appsmap); j++ {
+				if appsmap[j].depinfo == waitstr {
+					chans[j] <- j
+				}
+			}
+			wg.Done()
+                }(i)
+        }
+	wg.Wait()
+	for k:=0; k<len(appsmap); k++ {
+		if appsmap[k].rerr != nil {
+			return pkgerrors.Errorf("error during apps instantiation")
+		}
+	}
+	return nil
+
+}
+
+func (instca *CompositeAppContext) InstantiateComApp(cid interface{}) error {
+	ac := appcontext.AppContext{}
+
+	_, err := ac.LoadAppContext(cid)
+        if err != nil {
+                return err
+        }
+	instca.cid = cid
+
+	appsorder, err := ac.GetAppInstruction("order")
+        if err != nil {
+                return err
+        }
+	instca.appsorder = appsorder.(string)
+	appsdependency, err := ac.GetAppInstruction("dependency")
+        if err != nil {
+                return err
+        }
+	instca.appsdependency = appsdependency.(string)
+        instca.appsmap, err = getInstMap(instca.appsorder,instca.appsdependency, "app")
+        if err != nil {
+                return err
+        }
+
+	for j:=0; j<len(instca.appsmap); j++ {
+		clusternames, err := ac.GetClusterNames(instca.appsmap[j].name)
+		if err != nil {
+	                return err
+		}
+		instca.appsmap[j].clusters = make([]clusterInfo, len(clusternames))
+		for k:=0; k<len(clusternames); k++ {
+			instca.appsmap[j].clusters[k].name = clusternames[k]
+			resorder, err := ac.GetResourceInstruction(
+					instca.appsmap[j].name, clusternames[k], "order")
+			if err != nil {
+		                return err
+			}
+			instca.appsmap[j].clusters[k].resorder = resorder.(string)
+
+			resdependency, err := ac.GetResourceInstruction(
+					instca.appsmap[j].name, clusternames[k], "dependency")
+			if err != nil {
+		                return err
+			}
+			instca.appsmap[j].clusters[k].resdependency = resdependency.(string)
+
+			instca.appsmap[j].clusters[k].ressmap, err = getInstMap(
+				instca.appsmap[j].clusters[k].resorder,
+				instca.appsmap[j].clusters[k].resdependency, "res")
+			if err != nil {
+		                return err
+			}
+		}
+	}
+	err = instantiateApps(ac, instca.appsmap)
+        if err != nil {
+                return err
+        }
+
+	return nil
+}
+
+// Delete all the apps
+func  terminateApps(ac appcontext.AppContext, appsmap []instMap) error {
+	var wg sync.WaitGroup
+	var chans = make([]chan int, len(appsmap))
+	for l := range chans {
+		chans[l] = make(chan int)
+	}
+        for i:=0; i<len(appsmap); i++ {
+		wg.Add(1)
+                go func(index int) {
+                        if appsmap[index].depinfo == "go" {
+				appsmap[index].status = "start"
+			} else {
+				appsmap[index].status = "waiting"
+				c := <- chans[index]
+				if c != index {
+					appsmap[index].status = "error"
+                                        appsmap[index].rerr = pkgerrors.Errorf("channel does not match")
+					wg.Done()
+					return
+				}
+				appsmap[index].status = "start"
+			}
+			appsmap[index].rerr = terminateApp(ac, appsmap[index])
+			appsmap[index].status = "done"
+			waitstr := fmt.Sprintf("wait on %v",appsmap[index].name)
+			for j:=0; j<len(appsmap); j++ {
+				if appsmap[j].depinfo == waitstr {
+					chans[j] <- j
+				}
+			}
+			wg.Done()
+                }(i)
+        }
+	wg.Wait()
+	for k:=0; k<len(appsmap); k++ {
+		if appsmap[k].rerr != nil {
+			return pkgerrors.Errorf("error during apps instantiation")
+		}
+	}
+	return nil
+
+}
+// Delete all the resources for a given context
+func (instca *CompositeAppContext) TerminateComApp(cid interface{}) error {
+	ac := appcontext.AppContext{}
+
+	_, err := ac.LoadAppContext(cid)
+        if err != nil {
+                return err
+        }
+	instca.cid = cid
+
+	appsorder, err := ac.GetAppInstruction("order")
+        if err != nil {
+                return err
+        }
+	instca.appsorder = appsorder.(string)
+	appsdependency, err := ac.GetAppInstruction("dependency")
+        if err != nil {
+                return err
+        }
+	instca.appsdependency = appsdependency.(string)
+        instca.appsmap, err = getInstMap(instca.appsorder,instca.appsdependency, "app")
+        if err != nil {
+                return err
+        }
+
+	for j:=0; j<len(instca.appsmap); j++ {
+		clusternames, err := ac.GetClusterNames(instca.appsmap[j].name)
+		if err != nil {
+	                return err
+		}
+		instca.appsmap[j].clusters = make([]clusterInfo, len(clusternames))
+		for k:=0; k<len(clusternames); k++ {
+			instca.appsmap[j].clusters[k].name = clusternames[k]
+			resorder, err := ac.GetResourceInstruction(
+					instca.appsmap[j].name, clusternames[k], "order")
+			if err != nil {
+		                return err
+			}
+			instca.appsmap[j].clusters[k].resorder = resorder.(string)
+
+			resdependency, err := ac.GetResourceInstruction(
+					instca.appsmap[j].name, clusternames[k], "dependency")
+			if err != nil {
+		                return err
+			}
+			instca.appsmap[j].clusters[k].resdependency = resdependency.(string)
+
+			instca.appsmap[j].clusters[k].ressmap, err = getInstMap(
+				instca.appsmap[j].clusters[k].resorder,
+				instca.appsmap[j].clusters[k].resdependency, "res")
+			if err != nil {
+		                return err
+			}
+		}
+	}
+	err = terminateApps(ac, instca.appsmap)
+        if err != nil {
+                return err
+        }
+
+	return nil
+
+}