Source code for google.cloud.logging.logger

# Copyright 2016 Google LLC
#
# 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.

"""Define API Loggers."""

from google.cloud.logging.entries import LogEntry
from google.cloud.logging.entries import ProtobufEntry
from google.cloud.logging.entries import StructEntry
from google.cloud.logging.entries import TextEntry
from google.cloud.logging.resource import Resource


_GLOBAL_RESOURCE = Resource(type="global", labels={})


_OUTBOUND_ENTRY_FIELDS = (  # (name, default)
    ("type_", None),
    ("log_name", None),
    ("payload", None),
    ("labels", None),
    ("insert_id", None),
    ("severity", None),
    ("http_request", None),
    ("timestamp", None),
    ("resource", _GLOBAL_RESOURCE),
    ("trace", None),
    ("span_id", None),
    ("trace_sampled", None),
    ("source_location", None),
)


[docs]class Logger(object): """Loggers represent named targets for log entries. See https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.logs :type name: str :param name: the name of the logger :type client: :class:`google.cloud.logging.client.Client` :param client: A client which holds credentials and project configuration for the logger (which requires a project). :type labels: dict :param labels: (optional) mapping of default labels for entries written via this logger. """ def __init__(self, name, client, labels=None): self.name = name self._client = client self.labels = labels @property def client(self): """Clent bound to the logger.""" return self._client @property def project(self): """Project bound to the logger.""" return self._client.project @property def full_name(self): """Fully-qualified name used in logging APIs""" return "projects/%s/logs/%s" % (self.project, self.name) @property def path(self): """URI path for use in logging APIs""" return "/%s" % (self.full_name,) def _require_client(self, client): """Check client or verify over-ride. :type client: :class:`~google.cloud.logging.client.Client` or ``NoneType`` :param client: the client to use. If not passed, falls back to the ``client`` stored on the current logger. :rtype: :class:`google.cloud.logging.client.Client` :returns: The client passed in or the currently bound client. """ if client is None: client = self._client return client
[docs] def batch(self, client=None): """Return a batch to use as a context manager. :type client: :class:`~google.cloud.logging.client.Client` or ``NoneType`` :param client: the client to use. If not passed, falls back to the ``client`` stored on the current topic. :rtype: :class:`Batch` :returns: A batch to use as a context manager. """ client = self._require_client(client) return Batch(self, client)
def _do_log(self, client, _entry_class, payload=None, **kw): """Helper for :meth:`log_empty`, :meth:`log_text`, etc. """ client = self._require_client(client) # Apply defaults kw["log_name"] = kw.pop("log_name", self.full_name) kw["labels"] = kw.pop("labels", self.labels) kw["resource"] = kw.pop("resource", _GLOBAL_RESOURCE) if payload is not None: entry = _entry_class(payload=payload, **kw) else: entry = _entry_class(**kw) api_repr = entry.to_api_repr() client.logging_api.write_entries([api_repr])
[docs] def log_empty(self, client=None, **kw): """API call: log an empty message via a POST request See https://cloud.google.com/logging/docs/reference/v2/rest/v2/entries/write :type client: :class:`~google.cloud.logging.client.Client` or ``NoneType`` :param client: the client to use. If not passed, falls back to the ``client`` stored on the current logger. :type kw: dict :param kw: (optional) additional keyword arguments for the entry. See :class:`~google.cloud.logging.entries.LogEntry`. """ self._do_log(client, LogEntry, **kw)
[docs] def log_text(self, text, client=None, **kw): """API call: log a text message via a POST request See https://cloud.google.com/logging/docs/reference/v2/rest/v2/entries/write :type text: str :param text: the log message. :type client: :class:`~google.cloud.logging.client.Client` or ``NoneType`` :param client: the client to use. If not passed, falls back to the ``client`` stored on the current logger. :type kw: dict :param kw: (optional) additional keyword arguments for the entry. See :class:`~google.cloud.logging.entries.LogEntry`. """ self._do_log(client, TextEntry, text, **kw)
[docs] def log_struct(self, info, client=None, **kw): """API call: log a structured message via a POST request See https://cloud.google.com/logging/docs/reference/v2/rest/v2/entries/write :type info: dict :param info: the log entry information :type client: :class:`~google.cloud.logging.client.Client` or ``NoneType`` :param client: the client to use. If not passed, falls back to the ``client`` stored on the current logger. :type kw: dict :param kw: (optional) additional keyword arguments for the entry. See :class:`~google.cloud.logging.entries.LogEntry`. """ self._do_log(client, StructEntry, info, **kw)
[docs] def log_proto(self, message, client=None, **kw): """API call: log a protobuf message via a POST request See https://cloud.google.com/logging/docs/reference/v2/rest/v2/entries/list :type message: :class:`~google.protobuf.message.Message` :param message: The protobuf message to be logged. :type client: :class:`~google.cloud.logging.client.Client` or ``NoneType`` :param client: the client to use. If not passed, falls back to the ``client`` stored on the current logger. :type kw: dict :param kw: (optional) additional keyword arguments for the entry. See :class:`~google.cloud.logging.entries.LogEntry`. """ self._do_log(client, ProtobufEntry, message, **kw)
[docs] def delete(self, client=None): """API call: delete all entries in a logger via a DELETE request See https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.logs/delete :type client: :class:`~google.cloud.logging.client.Client` or ``NoneType`` :param client: the client to use. If not passed, falls back to the ``client`` stored on the current logger. """ client = self._require_client(client) client.logging_api.logger_delete(self.project, self.name)
[docs] def list_entries( self, projects=None, filter_=None, order_by=None, page_size=None, page_token=None, ): """Return a page of log entries. See https://cloud.google.com/logging/docs/reference/v2/rest/v2/entries/list :type projects: list of strings :param projects: project IDs to include. If not passed, defaults to the project bound to the client. :type filter_: str :param filter_: a filter expression. See https://cloud.google.com/logging/docs/view/advanced_filters :type order_by: str :param order_by: One of :data:`~google.cloud.logging.ASCENDING` or :data:`~google.cloud.logging.DESCENDING`. :type page_size: int :param page_size: Optional. The maximum number of entries in each page of results from this request. Non-positive values are ignored. Defaults to a sensible value set by the API. :type page_token: str :param page_token: Optional. If present, return the next batch of entries, using the value, which must correspond to the ``nextPageToken`` value returned in the previous response. Deprecated: use the ``pages`` property of the returned iterator instead of manually passing the token. :rtype: :class:`~google.api_core.page_iterator.Iterator` :returns: Iterator of log entries accessible to the current logger. See :class:`~google.cloud.logging.entries.LogEntry`. """ log_filter = "logName=%s" % (self.full_name,) if filter_ is not None: filter_ = "%s AND %s" % (filter_, log_filter) else: filter_ = log_filter return self.client.list_entries( projects=projects, filter_=filter_, order_by=order_by, page_size=page_size, page_token=page_token, )
[docs]class Batch(object): """Context manager: collect entries to log via a single API call. Helper returned by :meth:`Logger.batch` :type logger: :class:`google.cloud.logging.logger.Logger` :param logger: the logger to which entries will be logged. :type client: :class:`google.cloud.logging.client.Client` :param client: The client to use. :type resource: :class:`~google.cloud.logging.resource.Resource` :param resource: (Optional) Monitored resource of the batch, defaults to None, which requires that every entry should have a resource specified. Since the methods used to write entries default the entry's resource to the global resource type, this parameter is only required if explicitly set to None. If no entries' resource are set to None, this parameter will be ignored on the server. """ def __init__(self, logger, client, resource=None): self.logger = logger self.entries = [] self.client = client self.resource = resource def __enter__(self): return self def __exit__(self, exc_type, exc_val, exc_tb): if exc_type is None: self.commit()
[docs] def log_empty(self, **kw): """Add a entry without payload to be logged during :meth:`commit`. :type kw: dict :param kw: (optional) additional keyword arguments for the entry. See :class:`~google.cloud.logging.entries.LogEntry`. """ self.entries.append(LogEntry(**kw))
[docs] def log_text(self, text, **kw): """Add a text entry to be logged during :meth:`commit`. :type text: str :param text: the text entry :type kw: dict :param kw: (optional) additional keyword arguments for the entry. See :class:`~google.cloud.logging.entries.LogEntry`. """ self.entries.append(TextEntry(payload=text, **kw))
[docs] def log_struct(self, info, **kw): """Add a struct entry to be logged during :meth:`commit`. :type info: dict :param info: the struct entry :type kw: dict :param kw: (optional) additional keyword arguments for the entry. See :class:`~google.cloud.logging.entries.LogEntry`. """ self.entries.append(StructEntry(payload=info, **kw))
[docs] def log_proto(self, message, **kw): """Add a protobuf entry to be logged during :meth:`commit`. :type message: protobuf message :param message: the protobuf entry :type kw: dict :param kw: (optional) additional keyword arguments for the entry. See :class:`~google.cloud.logging.entries.LogEntry`. """ self.entries.append(ProtobufEntry(payload=message, **kw))
[docs] def commit(self, client=None): """Send saved log entries as a single API call. :type client: :class:`~google.cloud.logging.client.Client` or ``NoneType`` :param client: the client to use. If not passed, falls back to the ``client`` stored on the current batch. """ if client is None: client = self.client kwargs = {"logger_name": self.logger.full_name} if self.resource is not None: kwargs["resource"] = self.resource._to_dict() if self.logger.labels is not None: kwargs["labels"] = self.logger.labels entries = [entry.to_api_repr() for entry in self.entries] client.logging_api.write_entries(entries, **kwargs) del self.entries[:]