# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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.
from . import config_property
class KafkaConfig(dict):
"""A dictionary-like container class which allows for definition of overridable default values,
which is also capable of "rendering" itself as a useable server.properties file.
"""
DEFAULTS = {
config_property.SOCKET_RECEIVE_BUFFER_BYTES: 65536,
config_property.LOG_DIRS: "/mnt/kafka/kafka-data-logs-1,/mnt/kafka/kafka-data-logs-2",
config_property.METADATA_LOG_DIR: "/mnt/kafka/kafka-metadata-logs",
config_property.METADATA_LOG_SEGMENT_BYTES: str(9*1024*1024), # 9 MB
config_property.METADATA_LOG_BYTES_BETWEEN_SNAPSHOTS: str(10*1024*1024), # 10 MB
config_property.METADATA_LOG_RETENTION_BYTES: str(10*1024*1024), # 10 MB
config_property.METADATA_LOG_SEGMENT_MS: str(1*60*1000), # one minute
}
def __init__(self, **kwargs):
super(KafkaConfig, self).__init__(**kwargs)
# Set defaults
for key, val in self.DEFAULTS.items():
if key not in self:
self[key] = val
def render(self):
"""Render self as a series of lines key=val , and do so in a consistent order. """
keys = [k for k in self.keys()]
keys.sort()
s = ""
for k in keys:
s += "%s=%s " % (k, str(self[k]))
return s