kafka.common.Topic.scala Maven / Gradle / Ivy
The newest version!
/**
* 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.common
import util.matching.Regex
import kafka.server.OffsetManager
object Topic {
val legalChars = "[a-zA-Z0-9\\._\\-]"
private val maxNameLength = 255
private val rgx = new Regex(legalChars + "+")
val InternalTopics = Set(OffsetManager.OffsetsTopicName)
def validate(topic: String) {
if (topic.length <= 0)
throw new InvalidTopicException("topic name is illegal, can't be empty")
else if (topic.equals(".") || topic.equals(".."))
throw new InvalidTopicException("topic name cannot be \".\" or \"..\"")
else if (topic.length > maxNameLength)
throw new InvalidTopicException("topic name is illegal, can't be longer than " + maxNameLength + " characters")
rgx.findFirstIn(topic) match {
case Some(t) =>
if (!t.equals(topic))
throw new InvalidTopicException("topic name " + topic + " is illegal, contains a character other than ASCII alphanumerics, '.', '_' and '-'")
case None => throw new InvalidTopicException("topic name " + topic + " is illegal, contains a character other than ASCII alphanumerics, '.', '_' and '-'")
}
}
}