datestex/basic/componentHandling.py

# managing the components
# -----------------------------------------------------------------------------
"""
component has to be created in relation of the application (basis.yml).
Each componente could be created mostly once, but not everytime:
* the same instance of a component is used in different contexts
* there could be exist more instances
* there could be alternatives of an instance
Each kind of instance has its component-class and for each use should be an object be created.
Each crated component-onject are documented in the parameter-file.
"""
import utils.config_tool
import utils.conn_tool
import basic.program
import basic.message
import components.component
import importlib
import copy

comps = {}
PARAM_NOSUBNODE = ["artifact", "components", "instance"]


def getComponents(mainfct):
    job = basic.program.Job.getInstance()
    verify = -2 + job.getDebugLevel("job_tool")
    job.debug(verify, "getComponents " + mainfct)
    out = []
    for c in comps:
        job.debug(verify, "getComponents " + c + ": " + str(comps[c].conf))
        print("getComponents " + c + ": " + str(comps[c].conf))
        if mainfct in comps[c].conf["function"]:
            out.append(c)
    return out


class ComponentManager:
    __instance = None
    """ 
    initializes the Manager with all necessary components  
    """

    def __init__(self):
        job = basic.program.Job.getInstance()
        job.m.logDebug("applicationscomponente -- " + str(type(job.par)))
        self.components = {}
        print ("init ComponentHandling "+str(self))

    def initComponents(self):
        # sets components the first time
        # afterwards set components from parameter-file
        job = basic.program.Job.getInstance()
        anw = job.par.application
        job.m.logDebug("applicationscomponente -- " + str(type(job.par)))
        if not job.conf.confs["applicationen"].get(anw):
            job.m.setFatal("application " + job.par.application + " is not configured")
            return
        for k in job.conf.confs["applicationen"].get(anw):
            job.m.logDebug("applicationscomponente -- " + k + ":")
            self.createComponents(k, 0, "")

    def setComponents(self):
        # set components from parameter-file
        job = basic.program.Job.getInstance()
        job.m.logDebug("applicationscomponente -- " + str(type(job.par)))

    def getComponent(self, compobjname):
        job = basic.program.Job.getInstance()
        verify = -2 + job.getDebugLevel("job_tool")
        job.debug(verify, "getComponents " + compobjname)
        return comps[compobjname]

    def getComponents(mainfct):
        job = basic.program.Job.getInstance()
        verify = -2 + job.getDebugLevel("job_tool")
        job.debug(verify, "getComponents " + mainfct)
        out = []
        for c in comps:
            job.debug(verify, "getComponents " + c + ": " + str(comps[c].conf))
            print("getComponents " + c + ": " + str(comps[c].conf))
            if mainfct in comps[c].conf["function"]:
                out.append(c)
        return out

    @staticmethod
    def getInstance():
        if (ComponentManager.__instance is not None):
            return ComponentManager.__instance
        else:
            raise Exception("Klasse noch nicht initialisiert")

    def createComponents(self, componentName, nr, suffix):
        """
        in order to create a component it must be loaded
        * knogwedge of the application - which components should be created
        * technical-knowledge of the instanciated component, especially the connection, user, password
        * business-knowledge of the component, especially of their interfaces resp. artifacts
        :param componentName: Name of the component
        :param nr:
        :param suffix:
        :return:
        """
        job = basic.program.Job.getInstance()
        verify = job.getDebugLevel("job_tool")
        componentName = componentName.lower()
        print("createComponent " + componentName)
        confs = utils.config_tool.getConfig("comp", componentName)
        conns = utils.conn_tool.getConnections(componentName)
        print("createComponent -91- " + componentName + " : " + str(confs))
        if nr > 0 and int(confs["conf"]["instance"]["count"]) > 1:
            job.m.setError("for multiple callers are multiple calls not implemented ")
        if nr > 0 and len(conns) == 0:
            job.m.setError("for multiple calls has only one call configured")
        print(confs)
        print("createComponent 1 " + componentName)
        print(getComponentPath(componentName))
        print("createComponent 2 " + componentName)
        cmodul = importlib.import_module(getComponentPath(componentName))
        class_ = getattr(cmodul, getComponentClass(componentName))
        readedPar = job.loadParameter()
        if len(conns) == 1:
            print("createComponent 3 a " + componentName)
            if nr > 0 and confs["conf"]["instance"]["single"] == "n":
                name = componentName + "_0" + str(nr)
            else:
                name = componentName
            c = class_()
            c.name = name
            c.conf = confs["conf"]
            c.conf["conn"] = conns[0]
            c.m = basic.message.Message(basic.message.LIMIT_DEBUG, "logTime", name)
            c.init()
            print("createComponent 4 a " + componentName)
            print(vars(c))
            print(vars(c.m))
            if readedPar is not None:
                print("createComponent 5 a " + name + " : " + str(readedPar))
                for k in readedPar["components"][name].keys():
                    c.conf[k] = readedPar["components"][name][k]
            comps[name] = c
            self.createComponent(c, nr, suffix)
        else:
            i = 1
            print("createComponent 3 b " + componentName)
            for cn in conns:
                name = componentName + "_0" + str(i)
                c = class_()
                c.name = name
                c.conf = confs["conf"]
                c.conf["conn"] = conns[0]
                c.m = basic.message.Message(basic.message.LIMIT_DEBUG, "logTime", name)
                c.init()
                print("createComponent 4 b " + componentName)
                print(vars(c))
                if readedPar is not None:
                    for k in readedPar["components"][name].keys():
                        c.conf[k] = readedPar["components"][name][k]
                comps[name] = c
                self.createComponent(c, i, suffix)
                i = i + 1
        print("createComponent 9 " + componentName)
        print(comps)

    def createComponent(self, comp, nr, suffix):
        job = basic.program.Job.getInstance()
        verify = -2 + job.getDebugLevel("job_tool")
        job.debug(verify, "getComponents " + str(comp.conf["components"]))
        for c in comp.conf["components"].keys():
            if c == "none":
                continue
            self.createComponents(c, nr, suffix)


def getComponentFolder(comp):
    return comp.lower()


def getComponentModul(comp):
    return comp[0:1].upper() + comp[1:].lower()


def getComponentClass(comp):
    return comp[0:1].upper() + comp[1:].lower()


def getComponentPath(comp):
    return "components." + getComponentFolder(comp) + "." + getComponentModul(comp)


def getComponentDict():
    job = basic.program.Job.getInstance()
    verify = -2 + job.getDebugLevel("job_tool")
    job.debug(verify, "getComponents ")
    out = {}
    for c in comps:
        out[comps[c].name] = {}
        print("getCompDict " + comps[c].name)
        for k in comps[c].confs.keys():
            print("getCompDict " + k)
            if isParameterSubnode(k):  # "artifact" in k or "components" in k or "instance" in k:
                print("getCompDict -b- " + k)
                out[comps[c].name][k] = copy.deepcopy(comps[c].confs[k])
    return out


def isParameterSubnode(key):
    for k in PARAM_NOSUBNODE:
        if key in k:
            return False
    return True