Add OTI event-handler project

OTI event handler application in DCAEGEN2 platform

Change-Id: Ie64f26f851e2045f00043f90279d503c2dc62948
Issue-ID: DCAEGEN2-1910
Signed-off-by: Kotagiri, Ramprasad (rp5662) <rp5662@att.com>

1 files changed, 375 insertions, 0 deletions

diff --git a/oti/event-handler/otihandler/onap/audit.py b/oti/event-handler/otihandler/onap/audit.py
new file mode 100644
index 0000000..8cd16cf
--- /dev/null
+++ b/oti/event-handler/otihandler/onap/audit.py
@@ -0,0 +1,375 @@
+# ================================================================================
+# Copyright (c) 2019-2020 AT&T Intellectual Property. All rights reserved.
+# ================================================================================
+# 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.
+# ============LICENSE_END=========================================================
+
+"""generic class to keep track of request handling
+ from receiving it through reponse and log all the activities
+
+ call Audit.init("component-name", "path/to/config_file") to init the loggers before any requests
+
+ start each outside request with creation of the Audit object
+ audit = Audit(request_id=None, headers=None, msg=None)
+"""
+
+import os
+import sys
+import json
+import uuid
+import time
+import copy
+from datetime import datetime
+from threading import Lock
+from enum import Enum
+
+from .CommonLogger import CommonLogger
+from .health import Health
+
+REQUEST_X_ECOMP_REQUESTID = "X-ECOMP-RequestID"
+REQUEST_REMOTE_ADDR = "Remote-Addr"
+REQUEST_HOST = "Host"
+HOSTNAME = "HOSTNAME"
+
+AUDIT_REQUESTID = 'requestID'
+AUDIT_IPADDRESS = 'IPAddress'
+AUDIT_SERVER = 'server'
+AUDIT_TARGET_ENTITY = 'targetEntity'
+
+HEADER_CLIENTAUTH = "clientauth"
+HEADER_AUTHORIZATION = "authorization"
+
+class AuditHttpCode(Enum):
+    """audit http codes"""
+    HTTP_OK = 200
+    PERMISSION_UNAUTHORIZED_ERROR = 401
+    PERMISSION_FORBIDDEN_ERROR = 403
+    RESPONSE_ERROR = 400
+    DATA_NOT_FOUND_ERROR = 404
+    SERVER_INTERNAL_ERROR = 500
+    SERVICE_UNAVAILABLE_ERROR = 503
+    DATA_ERROR = 1030
+    SCHEMA_ERROR = 1040
+
+class AuditResponseCode(Enum):
+    """audit response codes"""
+    SUCCESS = 0
+    PERMISSION_ERROR = 100
+    AVAILABILITY_ERROR = 200
+    DATA_ERROR = 300
+    SCHEMA_ERROR = 400
+    BUSINESS_PROCESS_ERROR = 500
+    UNKNOWN_ERROR = 900
+
+    @staticmethod
+    def get_response_code(http_status_code):
+        """calculates the response_code from max_http_status_code"""
+        response_code = AuditResponseCode.UNKNOWN_ERROR
+        if http_status_code <= AuditHttpCode.HTTP_OK.value:
+            response_code = AuditResponseCode.SUCCESS
+
+        elif http_status_code in [AuditHttpCode.PERMISSION_UNAUTHORIZED_ERROR.value,
+                                  AuditHttpCode.PERMISSION_FORBIDDEN_ERROR.value]:
+            response_code = AuditResponseCode.PERMISSION_ERROR
+        elif http_status_code == AuditHttpCode.SERVICE_UNAVAILABLE_ERROR.value:
+            response_code = AuditResponseCode.AVAILABILITY_ERROR
+        elif http_status_code == AuditHttpCode.SERVER_INTERNAL_ERROR.value:
+            response_code = AuditResponseCode.BUSINESS_PROCESS_ERROR
+        elif http_status_code in [AuditHttpCode.DATA_ERROR.value,
+                                  AuditHttpCode.RESPONSE_ERROR.value,
+                                  AuditHttpCode.DATA_NOT_FOUND_ERROR.value]:
+            response_code = AuditResponseCode.DATA_ERROR
+        elif http_status_code == AuditHttpCode.SCHEMA_ERROR.value:
+            response_code = AuditResponseCode.SCHEMA_ERROR
+
+        return response_code
+
+    @staticmethod
+    def get_human_text(response_code):
+        """convert enum name into human readable text"""
+        if not response_code:
+            return "unknown"
+        return response_code.name.lower().replace("_", " ")
+
+class Audit(object):
+    """put the audit object on stack per each initiating request in the system
+
+    :request_id: is the X-ECOMP-RequestID for tracing
+
+    :req_message: is the request message string for logging
+
+    :aud_parent: is the parent request - used for sub-query metrics to other systems
+
+    :kwargs: - put any request related params into kwargs
+    """
+    _service_name = ""
+    _service_version = ""
+    _service_instance_uuid = str(uuid.uuid4())
+    _started = datetime.now()
+    _logger_debug = None
+    _logger_error = None
+    _logger_metrics = None
+    _logger_audit = None
+    _health = Health()
+    _py_ver = sys.version.replace("\n", "")
+
+    @staticmethod
+    def init(service_name, service_version, config_file_path):
+        """init static invariants and loggers"""
+        Audit._service_name = service_name
+        Audit._service_version = service_version
+        Audit._logger_debug = CommonLogger(config_file_path, "debug", \
+            instanceUUID=Audit._service_instance_uuid, serviceName=Audit._service_name)
+        Audit._logger_error = CommonLogger(config_file_path, "error", \
+            instanceUUID=Audit._service_instance_uuid, serviceName=Audit._service_name)
+        Audit._logger_metrics = CommonLogger(config_file_path, "metrics", \
+            instanceUUID=Audit._service_instance_uuid, serviceName=Audit._service_name)
+        Audit._logger_audit = CommonLogger(config_file_path, "audit", \
+            instanceUUID=Audit._service_instance_uuid, serviceName=Audit._service_name)
+
+    @staticmethod
+    def health():
+        """returns json for health check"""
+        now = datetime.now()
+        return {
+            "service_name" : Audit._service_name,
+            "service_version" : Audit._service_version,
+            "service_instance_UUID" : Audit._service_instance_uuid,
+            "python" : Audit._py_ver,
+            "started" : str(Audit._started),
+            "now" : str(now),
+            "uptime" : str(now - Audit._started),
+            "stats" : Audit._health.dump(),
+            "packages" : "N/A"  # Audit._packages
+        }
+
+    def __init__(self, request_id=None, req_message=None, aud_parent=None, **kwargs):
+        """create audit object per each request in the system
+
+        :request_id: is the X-ECOMP-RequestID for tracing
+        :req_message: is the request message string for logging
+        :aud_parent: is the parent Audit - used for sub-query metrics to other systems
+        :kwargs: - put any request related params into kwargs
+        """
+        self.request_id = request_id
+        self.req_message = req_message or ""
+        self.aud_parent = aud_parent
+        self.kwargs = kwargs or {}
+
+        self.retry_get_config = False
+        self.max_http_status_code = 0
+        self._lock = Lock()
+
+        if self.aud_parent:
+            if not self.request_id:
+                self.request_id = self.aud_parent.request_id
+            if not self.req_message:
+                self.req_message = self.aud_parent.req_message
+            self.kwargs = self.aud_parent.merge_all_kwargs(**self.kwargs)
+        else:
+            headers = self.kwargs.get("headers", {})
+            if headers:
+                if not self.request_id:
+                    self.request_id = headers.get(REQUEST_X_ECOMP_REQUESTID)
+                if AUDIT_IPADDRESS not in self.kwargs:
+                    self.kwargs[AUDIT_IPADDRESS] = headers.get(REQUEST_REMOTE_ADDR)
+                if AUDIT_SERVER not in self.kwargs:
+                    self.kwargs[AUDIT_SERVER] = headers.get(REQUEST_HOST)
+
+        if AUDIT_SERVER not in self.kwargs:
+            self.kwargs[AUDIT_SERVER] = os.environ.get(HOSTNAME)
+
+        created_req = ""
+        if not self.request_id:
+            created_req = " with new"
+            self.request_id = str(uuid.uuid4())
+
+        self.kwargs[AUDIT_REQUESTID] = self.request_id
+
+        self._started = time.time()
+        self._start_event = Audit._logger_audit.getStartRecordEvent()
+        self.metrics_start()
+
+        if not self.aud_parent:
+            self.info("new audit{0} request_id {1}, msg({2}), kwargs({3})"\
+                .format(created_req, self.request_id, self.req_message, json.dumps(self.kwargs)))
+
+    def merge_all_kwargs(self, **kwargs):
+        """returns the merge of copy of self.kwargs with the param kwargs"""
+        all_kwargs = self.kwargs.copy()
+        if kwargs:
+            all_kwargs.update(kwargs)
+        return all_kwargs
+
+    def set_http_status_code(self, http_status_code):
+        """accumulate the highest(worst) http status code"""
+        self._lock.acquire()
+        if self.max_http_status_code < AuditHttpCode.SERVER_INTERNAL_ERROR.value:
+            self.max_http_status_code = max(http_status_code, self.max_http_status_code)
+        self._lock.release()
+
+    def get_max_http_status_code(self):
+        """returns the highest(worst) http status code"""
+        self._lock.acquire()
+        max_http_status_code = self.max_http_status_code
+        self._lock.release()
+        return max_http_status_code
+
+    @staticmethod
+    def get_status_code(success):
+        """COMPLETE versus ERROR"""
+        if success:
+            return 'COMPLETE'
+        return 'ERROR'
+
+    @staticmethod
+    def hide_secrets(obj):
+        """hides the known secret field values of the dictionary"""
+        if not isinstance(obj, dict):
+            return obj
+
+        for key in obj:
+            if key.lower() in [HEADER_CLIENTAUTH, HEADER_AUTHORIZATION]:
+                obj[key] = "*"
+            elif isinstance(obj[key], dict):
+                obj[key] = Audit.hide_secrets(obj[key])
+
+        return obj
+
+    @staticmethod
+    def log_json_dumps(obj, **kwargs):
+        """hide the known secret field values of the dictionary and return json.dumps"""
+        if not isinstance(obj, dict):
+            return json.dumps(obj, **kwargs)
+
+        return json.dumps(Audit.hide_secrets(copy.deepcopy(obj)), **kwargs)
+
+    def is_serious_error(self, status_code):
+        """returns whether the response_code is success and a human text for response code"""
+        return AuditResponseCode.PERMISSION_ERROR.value \
+            == AuditResponseCode.get_response_code(status_code).value \
+            or self.get_max_http_status_code() >= AuditHttpCode.SERVER_INTERNAL_ERROR.value
+
+    def _get_response_status(self):
+        """calculates the response status fields from max_http_status_code"""
+        max_http_status_code = self.get_max_http_status_code()
+        response_code = AuditResponseCode.get_response_code(max_http_status_code)
+        success = (response_code.value == AuditResponseCode.SUCCESS.value)
+        response_description = AuditResponseCode.get_human_text(response_code)
+        return success, max_http_status_code, response_code, response_description
+
+    def is_success(self):
+        """returns whether the response_code is success and a human text for response code"""
+        success, _, _, _ = self._get_response_status()
+        return success
+
+    def debug(self, log_line, **kwargs):
+        """debug - the debug=lowest level of logging"""
+        Audit._logger_debug.debug(log_line, **self.merge_all_kwargs(**kwargs))
+
+    def info(self, log_line, **kwargs):
+        """debug - the info level of logging"""
+        Audit._logger_debug.info(log_line, **self.merge_all_kwargs(**kwargs))
+
+    def info_requested(self, result=None, **kwargs):
+        """info "requested ..." - the info level of logging"""
+        self.info("requested {0} {1}".format(self.req_message, result or ""), \
+            **self.merge_all_kwargs(**kwargs))
+
+    def warn(self, log_line, **kwargs):
+        """debug+error - the warn level of logging"""
+        all_kwargs = self.merge_all_kwargs(**kwargs)
+        Audit._logger_debug.warn(log_line, **all_kwargs)
+        Audit._logger_error.warn(log_line, **all_kwargs)
+
+    def error(self, log_line, **kwargs):
+        """debug+error - the error level of logging"""
+        all_kwargs = self.merge_all_kwargs(**kwargs)
+        Audit._logger_debug.error(log_line, **all_kwargs)
+        Audit._logger_error.error(log_line, **all_kwargs)
+
+    def fatal(self, log_line, **kwargs):
+        """debug+error - the fatal level of logging"""
+        all_kwargs = self.merge_all_kwargs(**kwargs)
+        Audit._logger_debug.fatal(log_line, **all_kwargs)
+        Audit._logger_error.fatal(log_line, **all_kwargs)
+
+    @staticmethod
+    def get_elapsed_time(started):
+        """returns the elapsed time since started in milliseconds"""
+        return int(round(1000 * (time.time() - started)))
+
+    def metrics_start(self, log_line=None, **kwargs):
+        """reset metrics timing"""
+        self._metrics_started = time.time()
+        self._metrics_start_event = Audit._logger_metrics.getStartRecordEvent()
+        if log_line:
+            self.info(log_line, **self.merge_all_kwargs(**kwargs))
+
+    def metrics(self, log_line, **kwargs):
+        """debug+metrics - the metrics=sub-audit level of logging"""
+        all_kwargs = self.merge_all_kwargs(**kwargs)
+        success, max_http_status_code, response_code, response_description = \
+            self._get_response_status()
+        metrics_func = None
+        timer = Audit.get_elapsed_time(self._metrics_started)
+        if success:
+            log_line = "done: {0}".format(log_line)
+            self.info(log_line, **all_kwargs)
+            metrics_func = Audit._logger_metrics.info
+            Audit._health.success(all_kwargs.get(AUDIT_TARGET_ENTITY, Audit._service_name), timer)
+        else:
+            log_line = "failed: {0}".format(log_line)
+            self.error(log_line, errorCode=response_code.value, \
+                errorDescription=response_description, **all_kwargs)
+            metrics_func = Audit._logger_metrics.error
+            Audit._health.error(all_kwargs.get(AUDIT_TARGET_ENTITY, Audit._service_name), timer)
+
+        metrics_func(log_line, begTime=self._metrics_start_event, timer=timer,
+                     statusCode=Audit.get_status_code(success), responseCode=response_code.value,
+                     responseDescription=response_description,
+                     **all_kwargs
+                    )
+
+        self.metrics_start()
+        return (success, max_http_status_code, response_description)
+
+    def audit_done(self, result=None, **kwargs):
+        """debug+audit - the audit=top level of logging"""
+        all_kwargs = self.merge_all_kwargs(**kwargs)
+        success, max_http_status_code, response_code, response_description = \
+            self._get_response_status()
+        log_line = "{0} {1}".format(self.req_message, result or "").strip()
+        audit_func = None
+        timer = Audit.get_elapsed_time(self._started)
+        if success:
+            log_line = "done: {0}".format(log_line)
+            self.info(log_line, **all_kwargs)
+            audit_func = Audit._logger_audit.info
+            Audit._health.success(all_kwargs.get(AUDIT_TARGET_ENTITY, Audit._service_name), timer)
+        else:
+            log_line = "failed: {0}".format(log_line)
+            self.error(log_line, errorCode=response_code.value,
+                       errorDescription=response_description, **all_kwargs)
+            audit_func = Audit._logger_audit.error
+            Audit._health.error(all_kwargs.get(AUDIT_TARGET_ENTITY, Audit._service_name), timer)
+
+        audit_func(log_line, begTime=self._start_event, timer=timer,
+                   statusCode=Audit.get_status_code(success),
+                   responseCode=response_code.value,
+                   responseDescription=response_description,
+                   **all_kwargs
+                  )
+
+        return (success, max_http_status_code, response_description)
+        # this line added to test