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authorMarek Szwalkiewicz <marek.szwalkiewicz@external.t-mobile.pl>2020-01-30 13:49:18 +0000
committerMarek Szwalkiewicz <marek.szwalkiewicz@external.t-mobile.pl>2020-01-30 13:52:07 +0000
commitbe4c46420944531765ecc8bae7305086d71a36d0 (patch)
treebe9309a134a50e964b1257395d74c41c2da512ef /ms/artifact-manager/manager
parentda25e1649c9a10f998c8dde068641d7601a3f00a (diff)
Add Artifact Manager service.
Adds a micro service that offers gRPC interface for CBA artifacts manipulation. By default the service is attached to py-executor but can be ran as a separate service if needed in the future. Issue-ID: CCSDK-1988 Change-Id: I40e20f085ae1c1e81a48f76dbea181af28d9bd0d Signed-off-by: Marek Szwalkiewicz <marek.szwalkiewicz@external.t-mobile.pl>
Diffstat (limited to 'ms/artifact-manager/manager')
-rw-r--r--ms/artifact-manager/manager/__init__.py14
-rw-r--r--ms/artifact-manager/manager/configuration.py139
-rw-r--r--ms/artifact-manager/manager/errors.py64
-rw-r--r--ms/artifact-manager/manager/servicer.py237
-rw-r--r--ms/artifact-manager/manager/utils.py176
5 files changed, 630 insertions, 0 deletions
diff --git a/ms/artifact-manager/manager/__init__.py b/ms/artifact-manager/manager/__init__.py
new file mode 100644
index 000000000..21236908e
--- /dev/null
+++ b/ms/artifact-manager/manager/__init__.py
@@ -0,0 +1,14 @@
+"""Copyright 2019 Deutsche Telekom.
+
+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.
+"""
diff --git a/ms/artifact-manager/manager/configuration.py b/ms/artifact-manager/manager/configuration.py
new file mode 100644
index 000000000..0af2c22cc
--- /dev/null
+++ b/ms/artifact-manager/manager/configuration.py
@@ -0,0 +1,139 @@
+"""Copyright 2019 Deutsche Telekom.
+
+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.
+"""
+import logging
+import os
+from configparser import ConfigParser, SectionProxy
+from distutils.util import strtobool
+from logging import Logger
+from pathlib import Path, PurePath
+from typing import NoReturn
+
+from onaplogging import monkey
+from onaplogging.mdcformatter import MDCFormatter # noqa
+
+monkey.patch_loggingYaml()
+
+
+DEFAUL_CONFIGURATION_FILE: str = str(PurePath(Path().absolute(), "../configuration.ini"))
+SUPPLIED_CONFIGURATION_FILE: str = os.environ.get("CONFIGURATION")
+CONFIGURATION_FILE: str = str(os.path.expanduser(Path(SUPPLIED_CONFIGURATION_FILE or DEFAUL_CONFIGURATION_FILE)))
+
+
+class ArtifactManagerConfiguration:
+ """ServerConfiguration class loads configuration from config INI files."""
+
+ def __init__(self, config_file_path: str) -> NoReturn:
+ """Initialize configuration class instance.
+
+ Configuration is loaded from file provided as a parameter. Environment variables are loaded also.
+ Logger for object is created with the name same as the class name.
+ :param config_file_path: Path to configuration file.
+ """
+ self.config_file_path = config_file_path
+ self.config = ConfigParser(os.environ)
+ self.config.read(config_file_path, encoding="utf-8")
+
+ @property
+ def configuration_directory(self) -> str:
+ """Get directory path to a directory with configuration ini file.
+
+ This is used to handle relative file paths in config file.
+ """
+ return os.path.dirname(self.config_file_path)
+
+ def get_section(self, section_name: str) -> SectionProxy:
+ """Get the section from configuration file.
+
+ :param section_name: Name of the section to get
+ :raises: KeyError
+ :return: SectionProxy object for given section name
+ """
+ return self.config[section_name]
+
+ def __getitem__(self, key: str) -> SectionProxy:
+ """Get the section from configuration file.
+
+ This method just calls the get_section method but allows us to use it as key lookup
+
+ :param section_name: Name of the section to get
+ :raises: KeyError
+ :return: SectionProxy object for given section name
+ """
+ return self.get_section(key)
+
+ def get_property(self, section_name: str, property_name: str) -> str:
+ """Get the property value from *section_name* section.
+
+ :param section_name: Name of the section config file section on which property is set
+ :param property_name: Name of the property to get
+ :raises: configparser.NoOptionError
+ :return: String value of the property
+ """
+ return self.config.get(section_name, property_name)
+
+ def artifact_manager_property(self, property_name: str) -> str:
+ """Get the property value from *artifactManagerServer* section.
+
+ :param property_name: Name of the property to get
+ :raises: configparser.NoOptionError
+ :return: String value of the property
+ """
+ return self.config.get("artifactManagerServer", property_name)
+
+
+config = ArtifactManagerConfiguration(CONFIGURATION_FILE)
+
+
+def prepare_logger(log_file_path: str, development_mode: bool, config: ArtifactManagerConfiguration) -> callable:
+ """Base MDC logger configuration.
+
+ Level depends on the *development_mode* flag: DEBUG if development_mode is set or INFO otherwise.
+ Console handler is created from MDC settings from onappylog library.
+
+ :param log_file_path: Path to the log file, where logs are going to be saved.
+ :param development_mode: Boolean type value which means if logger should be setup in development mode or not
+ :param config: Configuration class so we can fetch app settings (paths) to logger.
+ :return: callable
+ """
+ logging_level: int = logging.DEBUG if development_mode else logging.INFO
+ logging.basicConfig(filename=log_file_path, level=logging_level)
+ logging.config.yamlConfig(
+ filepath=Path(config.configuration_directory, config["artifactManagerServer"]["logConfig"])
+ )
+
+ console: logging.StreamHandler = logging.StreamHandler()
+ console.setLevel(logging_level)
+ formatter: logging.Formatter = MDCFormatter(
+ fmt="%(asctime)s:[%(name)s] %(created)f %(module)s %(funcName)s %(pathname)s %(process)d %(levelno)s :[ %(threadName)s %(thread)d]: [%(mdc)s]: [%(filename)s]-[%(lineno)d] [%(levelname)s]:%(message)s", # noqa
+ mdcfmt="{RequestID} {InvocationID} {ServiceName} {PartnerName} {BeginTimestamp} {EndTimestamp} {ElapsedTime} {StatusCode} {TargetEntity} {TargetServiceName} {Server}", # noqa
+ # Important: We cannot use %f here because this datetime format is used by time library, not datetime.
+ datefmt="%Y-%m-%dT%H:%M:%S%z",
+ )
+ console.setFormatter(formatter)
+
+ def get_logger(name: str) -> Logger:
+ """Get a new logger with predefined MDC handler."""
+ logger: Logger = logging.getLogger(name)
+ logger.addHandler(console)
+ return logger
+
+ return get_logger
+
+
+get_logger = prepare_logger(
+ config.artifact_manager_property("logFile"),
+ strtobool(config["artifactManagerServer"].get("debug", "false")),
+ config,
+)
diff --git a/ms/artifact-manager/manager/errors.py b/ms/artifact-manager/manager/errors.py
new file mode 100644
index 000000000..feafd7668
--- /dev/null
+++ b/ms/artifact-manager/manager/errors.py
@@ -0,0 +1,64 @@
+"""Copyright 2019 Deutsche Telekom.
+
+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.
+"""
+
+
+class ArtifactManagerError(Exception):
+ """Base Artifact Manager exception class."""
+
+ status_code: int = 0
+ message: str = "Error"
+
+ def __init__(self, message: str = None) -> None:
+ """Initialize exception with optional message."""
+ if message:
+ self.message: str = message
+
+ @property
+ def status_code(self) -> int:
+ """Artifact Manager error class status code.
+
+ Base class has no and shouldn't have any status code.
+ """
+ if self.status_code == 0:
+ raise NotImplementedError
+ return self.status_code
+
+
+class InvalidRequestError(ArtifactManagerError):
+ """Raised when request has invalid or incomplete data."""
+
+ status_code: int = 500
+ message: str = "Invalid request"
+
+
+class ArtifactNotFoundError(ArtifactManagerError):
+ """Raised when requested artifact doesn't exist in system."""
+
+ status_code: int = 500
+ message: str = "Artifact not found"
+
+
+class ArtifactIOError(ArtifactManagerError):
+ """Raised on input/output error."""
+
+ status_code: int = 500
+ message: str = "Artifact is corrupted"
+
+
+class ArtifactOverwriteError(ArtifactManagerError):
+ """Raised when we cannot remove old artifact to save new."""
+
+ status_code: int = 500
+ message: str = "Artifact already exists and cannot be overwritten"
diff --git a/ms/artifact-manager/manager/servicer.py b/ms/artifact-manager/manager/servicer.py
new file mode 100644
index 000000000..be740b0e3
--- /dev/null
+++ b/ms/artifact-manager/manager/servicer.py
@@ -0,0 +1,237 @@
+"""Copyright 2019 Deutsche Telekom.
+
+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.
+"""
+import socket
+from datetime import datetime, timezone
+from functools import wraps
+from logging import Logger
+from typing import NoReturn, Union
+
+from grpc import ServicerContext
+from manager.configuration import get_logger
+from manager.errors import ArtifactManagerError, InvalidRequestError
+from manager.utils import Repository, RepositoryStrategy
+from onaplogging.mdcContext import MDC
+from proto.BluePrintManagement_pb2 import (
+ BluePrintDownloadInput,
+ BluePrintManagementOutput,
+ BluePrintRemoveInput,
+ BluePrintUploadInput,
+)
+from proto.BluePrintManagement_pb2_grpc import BluePrintManagementServiceServicer
+
+MDC_DATETIME_FORMAT = r"%Y-%m-%dT%H:%M:%S.%f%z"
+COMMON_HEADER_DATETIME_FORMAT = r"%Y-%m-%dT%H:%M:%S.%fZ"
+
+
+def fill_common_header(func):
+ """Decorator to fill handler's output values which is the same type for each handler.
+
+ It copies commonHeader from request object and set timestamp value.
+
+ :param func: Handler function
+ :return: _handler decorator callable object
+ """
+
+ @wraps(func)
+ def _decorator(
+ servicer: "ArtifactManagerServicer",
+ request: Union[BluePrintDownloadInput, BluePrintRemoveInput, BluePrintUploadInput],
+ context: ServicerContext,
+ ) -> BluePrintManagementOutput:
+
+ if not all([request.actionIdentifiers.blueprintName, request.actionIdentifiers.blueprintVersion]):
+ raise InvalidRequestError("Request has to have set both BluePrint name and version")
+ output: BluePrintManagementOutput = func(servicer, request, context)
+ # Set same values for every handler
+ output.commonHeader.CopyFrom(request.commonHeader)
+ output.commonHeader.timestamp = datetime.utcnow().strftime(COMMON_HEADER_DATETIME_FORMAT)
+ return output
+
+ return _decorator
+
+
+def translate_exception_to_response(func):
+ """Decorator that translates Artifact Manager exceptions into proper responses.
+
+ :param func: Handler function
+ :return: _handler decorator callable object
+ """
+
+ @wraps(func)
+ def _handler(
+ servicer: "ArtifactManagerServicer",
+ request: Union[BluePrintDownloadInput, BluePrintRemoveInput, BluePrintUploadInput],
+ context: ServicerContext,
+ ) -> BluePrintManagementOutput:
+ try:
+ output: BluePrintManagementOutput = func(servicer, request, context)
+ output.status.code = 200
+ output.status.message = "success"
+ except ArtifactManagerError as error:
+ # If ArtifactManagerError is raises one of defined error occurs.
+ # Every ArtifactManagerError based exception has status_code paramenter
+ # which has to be set in output. Use also exception's message to
+ # set errorMessage of the output.
+ output: BluePrintManagementOutput = BluePrintManagementOutput()
+ output.status.code = error.status_code
+ output.status.message = "failure"
+ output.status.errorMessage = str(error.message)
+
+ servicer.fill_MDC_timestamps()
+ servicer.logger.error(
+ "Error while processing the message - blueprintName={} blueprintVersion={}".format(
+ request.actionIdentifiers.blueprintName, request.actionIdentifiers.blueprintVersion
+ ),
+ extra={"mdc": MDC.result()},
+ )
+ MDC.clear()
+ return output
+
+ return _handler
+
+
+def prepare_logging_context(func):
+ """Decorator that prepares MDC logging context for logs inside the handler.
+
+ :param func: Handler function
+ :return: _handler decorator callable object
+ """
+
+ @wraps(func)
+ def _decorator(
+ servicer: "ArtifactManagerServicer",
+ request: Union[BluePrintDownloadInput, BluePrintRemoveInput, BluePrintUploadInput],
+ context: ServicerContext,
+ ) -> BluePrintManagementOutput:
+ MDC.put("RequestID", request.commonHeader.requestId)
+ MDC.put("InvocationID", request.commonHeader.subRequestId)
+ MDC.put("ServiceName", servicer.__class__.__name__)
+ MDC.put("PartnerName", request.commonHeader.originatorId)
+ started_at = datetime.utcnow().replace(tzinfo=timezone.utc)
+ MDC.put("BeginTimestamp", started_at.strftime(MDC_DATETIME_FORMAT))
+
+ # Adding processing_started_at to the servicer so later we'll have the data to calculate elapsed time.
+ servicer.processing_started_at = started_at
+
+ MDC.put("TargetEntity", "py-executor")
+ MDC.put("TargetServiceName", func.__name__)
+ MDC.put("Server", socket.getfqdn())
+
+ output: BluePrintManagementOutput = func(servicer, request, context)
+ MDC.clear()
+ return output
+
+ return _decorator
+
+
+class ArtifactManagerServicer(BluePrintManagementServiceServicer):
+ """ArtifactManagerServer class.
+
+ Implements methods defined in proto files to manage artifacts repository.
+ These methods are: download, upload and remove.
+ """
+
+ processing_started_at = None
+
+ def __init__(self) -> NoReturn:
+ """Instance of ArtifactManagerServer class initialization.
+
+ Create logger for class using class name and set configuration property.
+ """
+ self.logger: Logger = get_logger(self.__class__.__name__)
+ self.repository: Repository = RepositoryStrategy.get_reporitory()
+
+ def fill_MDC_timestamps(self, status_code: int = 200) -> NoReturn:
+ """Add MDC context timestamps "in place".
+
+ :param status_code: int with expected response status. Default: 200 (success)
+ """
+ now = datetime.utcnow().replace(tzinfo=timezone.utc)
+ MDC.put("EndTimestamp", now.strftime(MDC_DATETIME_FORMAT))
+
+ # Elapsed time measured in miliseconds
+ MDC.put("ElapsedTime", (now - self.processing_started_at).total_seconds() * 1000)
+
+ MDC.put("StatusCode", status_code)
+
+ @prepare_logging_context
+ @translate_exception_to_response
+ @fill_common_header
+ def downloadBlueprint(self, request: BluePrintDownloadInput, context: ServicerContext) -> BluePrintManagementOutput:
+ """Download blueprint file request method.
+
+ Currently it only logs when is called and all base class method.
+ :param request: BluePrintDownloadInput
+ :param context: ServicerContext
+ :return: BluePrintManagementOutput
+ """
+ output: BluePrintManagementOutput = BluePrintManagementOutput()
+ output.fileChunk.chunk = self.repository.download_blueprint(
+ request.actionIdentifiers.blueprintName, request.actionIdentifiers.blueprintVersion
+ )
+ self.fill_MDC_timestamps()
+ self.logger.info(
+ "Blueprint download successfuly processed - blueprintName={} blueprintVersion={}".format(
+ request.actionIdentifiers.blueprintName, request.actionIdentifiers.blueprintVersion
+ ),
+ extra={"mdc": MDC.result()},
+ )
+ return output
+
+ @prepare_logging_context
+ @translate_exception_to_response
+ @fill_common_header
+ def uploadBlueprint(self, request: BluePrintUploadInput, context: ServicerContext) -> BluePrintManagementOutput:
+ """Upload blueprint file request method.
+
+ Currently it only logs when is called and all base class method.
+ :param request: BluePrintUploadInput
+ :param context: ServicerContext
+ :return: BluePrintManagementOutput
+ """
+ self.repository.upload_blueprint(
+ request.fileChunk.chunk, request.actionIdentifiers.blueprintName, request.actionIdentifiers.blueprintVersion
+ )
+ self.fill_MDC_timestamps()
+ self.logger.info(
+ "Blueprint upload successfuly processed - blueprintName={} blueprintVersion={}".format(
+ request.actionIdentifiers.blueprintName, request.actionIdentifiers.blueprintVersion
+ ),
+ extra={"mdc": MDC.result()},
+ )
+ return BluePrintManagementOutput()
+
+ @prepare_logging_context
+ @translate_exception_to_response
+ @fill_common_header
+ def removeBlueprint(self, request: BluePrintRemoveInput, context: ServicerContext) -> BluePrintManagementOutput:
+ """Remove blueprint file request method.
+
+ Currently it only logs when is called and all base class method.
+ :param request: BluePrintRemoveInput
+ :param context: ServicerContext
+ :return: BluePrintManagementOutput
+ """
+ self.repository.remove_blueprint(
+ request.actionIdentifiers.blueprintName, request.actionIdentifiers.blueprintVersion
+ )
+ self.fill_MDC_timestamps()
+ self.logger.info(
+ "Blueprint removal successfuly processed - blueprintName={} blueprintVersion={}".format(
+ request.actionIdentifiers.blueprintName, request.actionIdentifiers.blueprintVersion
+ ),
+ extra={"mdc": MDC.result()},
+ )
+ return BluePrintManagementOutput()
diff --git a/ms/artifact-manager/manager/utils.py b/ms/artifact-manager/manager/utils.py
new file mode 100644
index 000000000..da4cd9f9d
--- /dev/null
+++ b/ms/artifact-manager/manager/utils.py
@@ -0,0 +1,176 @@
+"""Copyright 2019 Deutsche Telekom.
+
+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.
+"""
+
+import os
+import shutil
+from abc import ABC, abstractmethod
+from io import BytesIO
+from pathlib import Path
+from zipfile import ZipFile, is_zipfile
+
+from manager.configuration import config
+from manager.errors import ArtifactNotFoundError, ArtifactOverwriteError, InvalidRequestError
+
+
+class Repository(ABC):
+ """Abstract repository class.
+
+ Defines repository methods.
+ """
+
+ @abstractmethod
+ def upload_blueprint(self, file: bytes, name: str, version: str) -> None:
+ """Store blueprint file in the repository.
+
+ :param file: File to save
+ :param name: Blueprint name
+ :param version: Blueprint version
+ """
+
+ @abstractmethod
+ def download_blueprint(self, name: str, version: str) -> bytes:
+ """Download blueprint file from repository.
+
+ :param name: Blueprint name
+ :param version: Blueprint version
+ :return: Zipped Blueprint file bytes
+ """
+
+ @abstractmethod
+ def remove_blueprint(self, name: str, version: str) -> None:
+ """Remove blueprint file from repository.
+
+ :param name: Blueprint name
+ :param version: Blueprint version
+ """
+
+
+class FileRepository(Repository):
+ """Store blueprints on local directory."""
+
+ base_path = None
+
+ def __init__(self, base_path: Path) -> None:
+ """Initialize the repository while passing the needed path.
+
+ :param base_path: Local OS path on which blueprint files reside.
+ """
+ self.base_path = base_path
+
+ def __remove_directory_tree(self, full_path: str) -> None:
+ """Remove specified path.
+
+ :param full_path: Full path to a directory.
+ :raises: FileNotFoundError
+ """
+ try:
+ shutil.rmtree(full_path, ignore_errors=False)
+ except OSError:
+ raise ArtifactNotFoundError
+
+ def __create_directory_tree(self, full_path: str, mode: int = 0o744, retry_on_error: bool = True) -> None:
+ """Create directory or overwrite existing one.
+
+ This method will handle a directory tree creation. If there is a collision
+ in directory structure - old directory tree will be removed
+ and creation will be attempted one more time. If the creation fails for the second time
+ the exception will be raised.
+
+ :param full_path: Full directory tree path (eg. one/two/tree) as string.
+ :param mode: Permission mask for the directories.
+ :param retry_on_error: Flag that indicates if there should be a attempt to retry the operation.
+ """
+ try:
+ os.makedirs(full_path, mode=mode)
+ except FileExistsError:
+ # In this case we know that cba of same name and version need to be overwritten
+ if retry_on_error:
+ self.__remove_directory_tree(full_path)
+ self.__create_directory_tree(full_path, mode=mode, retry_on_error=False)
+ else:
+ # This way we won't try for ever if something goes wrong
+ raise ArtifactOverwriteError
+
+ def upload_blueprint(self, cba_bytes: bytes, name: str, version: str) -> None:
+ """Store blueprint file in the repository.
+
+ :param cba_bytes: Bytes to save
+ :param name: Blueprint name
+ :param version: Blueprint version
+ """
+ temporary_file: BytesIO = BytesIO(cba_bytes)
+
+ if not is_zipfile(temporary_file):
+ raise InvalidRequestError
+
+ target_path: str = str(Path(self.base_path.absolute(), name, version))
+ self.__create_directory_tree(target_path)
+
+ with ZipFile(temporary_file, "r") as zip_file: # type: ZipFile
+ zip_file.extractall(target_path)
+
+ def download_blueprint(self, name: str, version: str) -> bytes:
+ """Download blueprint file from repository.
+
+ This method does the in-memory zipping the files and returns bytes
+
+ :param name: Blueprint name
+ :param version: Blueprint version
+ :return: Zipped Blueprint file bytes
+ """
+ temporary_file: BytesIO = BytesIO()
+ files_path: str = str(Path(self.base_path.absolute(), name, version))
+ if not os.path.exists(files_path):
+ raise ArtifactNotFoundError
+
+ with ZipFile(temporary_file, "w") as zip_file: # type: ZipFile
+ for directory_name, subdirectory_names, filenames in os.walk(files_path): # type: str, list, list
+ for filename in filenames: # type: str
+ zip_file.write(Path(directory_name, filename))
+
+ # Rewind the fake file to allow reading
+ temporary_file.seek(0)
+
+ zip_as_bytes: bytes = temporary_file.read()
+ temporary_file.close()
+ return zip_as_bytes
+
+ def remove_blueprint(self, name: str, version: str) -> None:
+ """Remove blueprint file from repository.
+
+ :param name: Blueprint name
+ :param version: Blueprint version
+ :raises: FileNotFoundError
+ """
+ files_path: str = str(Path(self.base_path.absolute(), name, version))
+ self.__remove_directory_tree(files_path)
+
+
+class RepositoryStrategy(ABC):
+ """Strategy class.
+
+ It has only one public method `get_repository`, which returns valid repository
+ instance for the the configuration value.
+ You can create many Repository subclasses, but repository clients doesn't have
+ to know which one you use.
+ """
+
+ @classmethod
+ def get_reporitory(cls) -> Repository:
+ """Get the valid repository instance for the configuration value.
+
+ Currently it returns FileRepository because it is an only Repository implementation.
+ """
+ return FileRepository(Path(config["artifactManagerServer"]["fileRepositoryBasePath"]))