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/**
* 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.
*/
package kafka.utils
import java.util.Properties
import java.util.Collections
import scala.collection._
import kafka.message.{CompressionCodec, NoCompressionCodec}
import scala.collection.JavaConverters._
class VerifiableProperties(val props: Properties) extends Logging {
private val referenceSet = mutable.HashSet[String]()
def this() = this(new Properties)
def containsKey(name: String): Boolean = {
props.containsKey(name)
}
def getProperty(name: String): String = {
val value = props.getProperty(name)
referenceSet.add(name)
if(value == null) value else value.trim()
}
/**
* Read a required integer property value or throw an exception if no such property is found
*/
def getInt(name: String): Int = getString(name).toInt
def getIntInRange(name: String, range: (Int, Int)): Int = {
require(containsKey(name), "Missing required property '" + name + "'")
getIntInRange(name, -1, range)
}
/**
* Read an integer from the properties instance
* @param name The property name
* @param default The default value to use if the property is not found
* @return the integer value
*/
def getInt(name: String, default: Int): Int =
getIntInRange(name, default, (Int.MinValue, Int.MaxValue))
def getShort(name: String, default: Short): Short =
getShortInRange(name, default, (Short.MinValue, Short.MaxValue))
/**
* Read an integer from the properties instance. Throw an exception
* if the value is not in the given range (inclusive)
* @param name The property name
* @param default The default value to use if the property is not found
* @param range The range in which the value must fall (inclusive)
* @throws IllegalArgumentException If the value is not in the given range
* @return the integer value
*/
def getIntInRange(name: String, default: Int, range: (Int, Int)): Int = {
val v =
if(containsKey(name))
getProperty(name).toInt
else
default
require(v >= range._1 && v <= range._2, name + " has value " + v + " which is not in the range " + range + ".")
v
}
def getShortInRange(name: String, default: Short, range: (Short, Short)): Short = {
val v =
if(containsKey(name))
getProperty(name).toShort
else
default
require(v >= range._1 && v <= range._2, name + " has value " + v + " which is not in the range " + range + ".")
v
}
/**
* Read a required long property value or throw an exception if no such property is found
*/
def getLong(name: String): Long = getString(name).toLong
/**
* Read an long from the properties instance
* @param name The property name
* @param default The default value to use if the property is not found
* @return the long value
*/
def getLong(name: String, default: Long): Long =
getLongInRange(name, default, (Long.MinValue, Long.MaxValue))
/**
* Read an long from the properties instance. Throw an exception
* if the value is not in the given range (inclusive)
* @param name The property name
* @param default The default value to use if the property is not found
* @param range The range in which the value must fall (inclusive)
* @throws IllegalArgumentException If the value is not in the given range
* @return the long value
*/
def getLongInRange(name: String, default: Long, range: (Long, Long)): Long = {
val v =
if(containsKey(name))
getProperty(name).toLong
else
default
require(v >= range._1 && v <= range._2, name + " has value " + v + " which is not in the range " + range + ".")
v
}
/**
* Get a required argument as a double
* @param name The property name
* @return the value
* @throws IllegalArgumentException If the given property is not present
*/
def getDouble(name: String): Double = getString(name).toDouble
/**
* Get an optional argument as a double
* @param name The property name
* @param default The default value for the property if not present
*/
def getDouble(name: String, default: Double): Double = {
if(containsKey(name))
getDouble(name)
else
default
}
/**
* Read a boolean value from the properties instance
* @param name The property name
* @param default The default value to use if the property is not found
* @return the boolean value
*/
def getBoolean(name: String, default: Boolean): Boolean = {
if(!containsKey(name))
default
else {
val v = getProperty(name)
require(v == "true" || v == "false", "Unacceptable value for property '" + name + "', boolean values must be either 'true' or 'false")
v.toBoolean
}
}
def getBoolean(name: String) = getString(name).toBoolean
/**
* Get a string property, or, if no such property is defined, return the given default value
*/
def getString(name: String, default: String): String = {
if(containsKey(name))
getProperty(name)
else
default
}
/**
* Get a string property or throw and exception if no such property is defined.
*/
def getString(name: String): String = {
require(containsKey(name), "Missing required property '" + name + "'")
getProperty(name)
}
/**
* Get a Map[String, String] from a property list in the form k1:v2, k2:v2, ...
*/
def getMap(name: String, valid: String => Boolean = _ => true): Map[String, String] = {
try {
val m = CoreUtils.parseCsvMap(getString(name, ""))
m.foreach {
case(key, value) =>
if(!valid(value))
throw new IllegalArgumentException("Invalid entry '%s' = '%s' for property '%s'".format(key, value, name))
}
m
} catch {
case e: Exception => throw new IllegalArgumentException("Error parsing configuration property '%s': %s".format(name, e.getMessage))
}
}
/**
* Parse compression codec from a property list in either. Codecs may be specified as integers, or as strings.
* See [[kafka.message.CompressionCodec]] for more details.
* @param name The property name
* @param default Default compression codec
* @return compression codec
*/
def getCompressionCodec(name: String, default: CompressionCodec) = {
val prop = getString(name, NoCompressionCodec.name)
try {
CompressionCodec.getCompressionCodec(prop.toInt)
}
catch {
case _: NumberFormatException =>
CompressionCodec.getCompressionCodec(prop)
}
}
def verify(): Unit = {
info("Verifying properties")
val propNames = Collections.list(props.propertyNames).asScala.map(_.toString).sorted
for(key <- propNames) {
if (!referenceSet.contains(key) && !key.startsWith("external"))
warn("Property %s is not valid".format(key))
else
info("Property %s is overridden to %s".format(key, props.getProperty(key)))
}
}
override def toString: String = props.toString
}