def __init__(self, namespace): self.ns = namespace self.client = GridStorageClient(namespace, nocache=(not "off"))
class ListenerGridAccess: #init def __init__(self, namespace): self.ns = namespace self.client = GridStorageClient(namespace, nocache=(not "off")) def seterr(self, msg): return __class__ + msg # create containers if does'nt exist #return error if an error occurs def create_container(self, containerName): error = "" self.containerName = self.ns + "/" + containerName url = GridUrl(self.ns + "/" + containerName) try: self.client.create_container(url.cid) except ContainerExists: #Container already exists pass except _GridException as e: return "Failed to CREATE container ["+url.cid.name+"] : "+str(e) except: return "Failed to CREATE container ["+url.cid.name+"]: Unknown error" return "" #write a bloc to a ns/container/content #path=ns/containerName/contentName #stream = io.BytesIO(..) #return error if an error occurs def put_content(self, path, stream, size): if size <= 0: return "No put content besause size of stream = 0" url = GridUrl(path) #client = self.client.GridStorageClient(self.ns) try: self.client.put_content(url.cid, url.content_name, size, stream) except Exception as e: return "Failed to CREATE content [" + path + "] : "+str(e) except: return "Failed to CREATE content [" + path + "]: Unknown error" return "" #read a bloc from ns/container/content #path=ns/containerName/contentName #stream = io.BytesIO(..) #return the buffer of content def get_content(self, path): url = GridUrl(path) try: return self.client.get_content(url.cid, url.content_name) except Exception as e: msg = "Failed to GET content [" + path + "] : "+str(e) logging.error(msg) syslog.syslog(syslog.LOG_ERR, msg) except: msg = "Failed to GET content [" + path + "]: Unknown error" logging.error(msg) syslog.syslog(syslog.LOG_ERR, msg) return "" #delete a content from ns/container/content #path=ns/containerName/contentName #return error if an error occurs def remove_content(self, path): url = GridUrl(path) try: self.client.remove_content(url.cid, url.content_name) except Exception as e: return "Failed to DELETE content [" + path + "] : "+str(e) except: return "Failed to DELETE content [" + path + "]: Unknown error" return ""
