structlog: add structlog logger factory

* closes inveniosoftware/invenio-vocabularies#353

invenio_logging/structlog.py

@@ -0,0 +1,69 @@
+import structlog
+import logging
+from logging import StreamHandler
+import sys
+
+class LoggerFactory:
+    @staticmethod
+    def configure_logging(logger_name=None, level=logging.INFO, handler=None, processors=None):
+        """
+        Configures the logging for the specified logger.
+
+        Args:
+            logger_name (str): The name of the logger. If not provided, a root logger will be used.
+            level (int): The logging level. Defaults to logging.INFO.
+            handler (logging.Handler): The logging handler to use. If not provided, a StreamHandler with stdout will be used.
+            processors (list): The list of structlog processors to apply. If not provided, a default set of processors will be used.
+
+        Returns:
+            structlog.BoundLogger: The configured logger.
+
+        """
+        if processors is None:
+            processors = [
+                structlog.stdlib.filter_by_level,
+                structlog.stdlib.add_logger_name,
+                structlog.stdlib.add_log_level,
+                structlog.processors.TimeStamper(fmt="iso"),
+                structlog.processors.JSONRenderer()
+            ]
+
+        # Create a new logger
+        logger = logging.getLogger(logger_name)
+        logger.setLevel(level)
+
+        # Use the provided handler or default to StreamHandler with stdout
+        if handler is None:
+            handler = StreamHandler(sys.stdout)
+
+        handler.setFormatter(logging.Formatter("%(message)s"))
+
+        # Add handler to logger if not already added
+        if not logger.handlers:
+            logger.addHandler(handler)
+
+        structlog.configure(
+            processors=processors,
+            context_class=dict,
+            logger_factory=structlog.stdlib.LoggerFactory(),
+            wrapper_class=structlog.stdlib.BoundLogger,
+            cache_logger_on_first_use=True,
+        )
+        return structlog.wrap_logger(logger)
+
+    @staticmethod
+    def get_logger(name=None, level=logging.INFO, handler=None, processors=None):
+        """
+        Retrieves a configured logger with the specified name.
+
+        Args:
+            name (str): The name of the logger. If not provided, a root logger will be used.
+            level (int): The logging level. Defaults to logging.INFO.
+            handler (logging.Handler): The logging handler to use. If not provided, a StreamHandler with stdout will be used.
+            processors (list): The list of structlog processors to apply. If not provided, a default set of processors will be used.
+
+        Returns:
+            structlog.BoundLogger: The configured logger.
+
+        """
+        return LoggerFactory.configure_logging(name, level, handler, processors)

setup.cfg

@@ -29,6 +29,7 @@ zip_safe = False
 install_requires =
     invenio-celery>=1.2.4
     invenio-db>=1.0.12
+    structlog>=24.2.0
 
 [options.extras_require]
 tests =