Stanislav Hejny
247 lines
9.0 KiB
Python
247 lines
9.0 KiB
Python
import configparser
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import inspect
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import os
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from amqp.adapter.logging_utils import logging_error, logging_warning
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"""
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Convert configuration from properties file to an object.
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"""
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class AMQAdapter:
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"""
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configuration with prefix 'cm.amq-adapter'
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"""
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PREFIX: str = "cm.amq-adapter."
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def __init__(self, config: configparser.ConfigParser):
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"""
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cm.amq-adapter.service-name=amq-adapter
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cm.amq-adapter.generator-id=164
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cm.amq-adapter.route-mapping=
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:param config: config parser to read configuration values
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"""
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self.generator_id = 0
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self.service_name = config.get(
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"CleverMicro-AMQ",
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self.PREFIX + "service-name",
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fallback="amq-python-adapter-" + str(self.generator_id),
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)
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self.route_mapping = config.get(
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"CleverMicro-AMQ", self.PREFIX + "route-mapping", fallback=None
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)
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self.require_authenticated_user = config.getboolean(
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"CleverMicro-AMQ",
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self.PREFIX + "require-authenticated-user",
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fallback=False,
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)
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self.backpressure_enabled = config.getboolean(
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"CleverMicro-AMQ",
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self.PREFIX + "default-backpressure-enabled",
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fallback=False,
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)
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self.callbacks_enabled = config.getboolean(
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"CleverMicro-AMQ",
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self.PREFIX + "callbacks-enabled",
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fallback=False,
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)
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# these 2 shall be provided by Docker swarm, format is a random alphanumeric string
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self.swarm_service_id = os.getenv("SWARM_SERVICE_ID", default="clever-amqp-service")
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self.swarm_task_id = os.getenv("SWARM_TASK_ID", default="python-adapter")
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#
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# Consul related configuration
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self.consul_port = (
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int(
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os.getenv(
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"CONSUL_PORT",
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config.get("CleverMicro-AMQ", self.PREFIX + "consul-port", fallback="8500"),
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)
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)
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if os.getenv("CONSUL_PORT") is not None
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else config.getint("CleverMicro-AMQ", self.PREFIX + "consul-port", fallback=8500)
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)
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self.consul_host = os.getenv(
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"CONSUL_HOST",
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config.get("CleverMicro-AMQ", self.PREFIX + "consul-host", fallback="consul"),
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)
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self.consul_max_retries = (
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int(
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os.getenv(
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"CONSUL_MAX_RETRIES",
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config.get("CleverMicro-AMQ", self.PREFIX + "consul-max-retries", fallback="5"),
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)
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)
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if os.getenv("CONSUL_MAX_RETRIES") is not None
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else config.getint("CleverMicro-AMQ", self.PREFIX + "consul-max-retries", fallback=5)
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)
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self.consul_initial_retry_delay = (
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float(
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os.getenv(
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"CONSUL_INITIAL_RETRY_DELAY",
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config.get(
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"CleverMicro-AMQ",
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self.PREFIX + "consul-initial-retry-delay",
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fallback="0.2",
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),
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)
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)
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if os.getenv("CONSUL_INITIAL_RETRY_DELAY") is not None
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else config.getfloat(
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"CleverMicro-AMQ", self.PREFIX + "consul-initial-retry-delay", fallback=0.2
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)
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)
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self.consul_counter_key = (
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os.getenv(
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"CONSUL_COUNTER_KEY",
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config.get(
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"CleverMicro-AMQ",
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self.PREFIX + "consul-counter-key",
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fallback="service/ids/counter",
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),
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)
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if os.getenv("CONSUL_COUNTER_KEY") is not None
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else config.get(
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"CleverMicro-AMQ",
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self.PREFIX + "consul-counter-key",
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fallback="service/ids/counter",
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)
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)
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def adapter_prefix(self) -> str:
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return f"{self.service_name}-{self.generator_id}-"
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class Dispatch:
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"""
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configuration with prefix 'cm.dispatch'
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"""
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PREFIX: str = "cm.dispatch."
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def __init__(self, config: configparser.ConfigParser):
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"""
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cm.dispatch.use-dlq=true
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cm.dispatch.amq-host=rabbitmq
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cm.dispatch.amq-port=5672
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cm.dispatch.amq-port-tls=5671
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cm.dispatch.service-host=
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cm.dispatch.service-port=8080
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:param config: config parser to read configuration values
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"""
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self.use_dlq = config.getboolean("CleverMicro-AMQ", self.PREFIX + "use-dlq", fallback=False)
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self.amq_host = config.get("CleverMicro-AMQ", self.PREFIX + "amq-host", fallback="rabbitmq")
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self.amq_port = config.getint("CleverMicro-AMQ", self.PREFIX + "amq-port", fallback=5672)
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self.amq_port_tls = config.getint(
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"CleverMicro-AMQ", self.PREFIX + "amq-port-tls", fallback=5671
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)
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self.service_host = config.get(
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"CleverMicro-AMQ", self.PREFIX + "service-host", fallback="localhost"
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)
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self.service_port = config.getint(
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"CleverMicro-AMQ", self.PREFIX + "service-port", fallback=8080
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)
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self.rabbit_mq_user = os.getenv("RABBIT_MQ_USER", "springuser")
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self.rabbit_mq_password = os.getenv("RABBIT_MQ_PASSWORD", "TheCleverWho")
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self.rabbit_mq_url = (
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f"amqp://{self.rabbit_mq_user}:{self.rabbit_mq_password}@{self.amq_host}/"
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)
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self.download_dir = config.get(
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"CleverMicro-AMQ", self.PREFIX + "download-dir", fallback="downloaded_files"
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)
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class Backpressure:
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"""
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configuration with prefix 'cm.backpressure'
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"""
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PREFIX: str = "cm.backpressure."
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def __init__(self, config: configparser.ConfigParser):
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"""
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cm.backpressure.threshold=20
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cm.backpressure.time-window=3000
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:param config: config parser to read configuration values
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"""
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self.threshold_load = config.getint(
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"CleverMicro-AMQ",
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self.PREFIX + "threshold",
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fallback=int(os.getenv("MAX_AVAILABILITY", 1)),
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)
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# time-window in seconds, duration between backpressure reports
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self.time_window = config.getint(
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"CleverMicro-AMQ", self.PREFIX + "time-window", fallback=10
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)
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# Define maximum CPU usage before triggering backpressure OVERLOAD alert
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self.threshold_cpu = config.getint(
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"CleverMicro-AMQ", self.PREFIX + "threshold-cpu", fallback=90
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)
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# Define the time window length, in seconds, during which, if CPU usage is consistently above the threshold, the system will trigger OVERLOAD alert
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self.cpu_overload_duration = config.getint(
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"CleverMicro-AMQ", self.PREFIX + "cpu-overload-duration", fallback=30
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)
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# Define the time window length, in seconds, during which, if no request is made to the Service, the system will trigger IDLE alert
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self.idle_duration = config.getint(
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"CleverMicro-AMQ", self.PREFIX + "idle-duration", fallback=30
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)
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# Flag to enable/disable CPU monitoring
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self.cpu_monitoring_enabled = config.getboolean(
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"CleverMicro-AMQ", self.PREFIX + "cpu-monitoring-enabled", fallback=False
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)
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class AMQConfiguration:
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"""
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Top level configuration context holder / object
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"""
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def __init__(self, config_file_name: str = None):
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config = configparser.ConfigParser()
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# Read the application.properties file
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if os.path.exists(config_file_name):
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config.read(config_file_name)
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else:
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# Get the directory of the caller (the module where this function is called)
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caller_frame = inspect.stack()[1] # 0 is current_availability frame, 1 is caller
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caller_module = inspect.getmodule(caller_frame[0])
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if caller_module:
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caller_dir = os.path.dirname(os.path.abspath(caller_module.__file__))
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config_file_path = os.path.join(caller_dir, config_file_name)
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config.read(config_file_path)
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else:
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logging_error(f"Configuration file not found: {config_file_name}")
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logging_warning(
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"Defaulting to preset values, which will likely be wrong, causing errors."
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)
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# Override values with environment variables
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for section in config.sections():
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for option in config.options(section):
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# env_var = f"{section.upper()}_{option.upper()}"
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if option in os.environ:
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config.set(section, option, os.environ[option])
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#
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# Add individual config areas
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#
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self.amq_adapter: AMQAdapter = AMQAdapter(config)
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self.dispatch: Dispatch = Dispatch(config)
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self.backpressure: Backpressure = Backpressure(config)
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def get_unique_instance_id(self) -> int:
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"""
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Get a unique instance ID for this AMQ service.
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Returns:
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int: A unique instance ID
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"""
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if self.instance_id == -1:
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logging_warning(f"Generated unique instance ID: {self.instance_id}")
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return self.instance_id
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