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SchemaExposer.scala
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SchemaExposer.scala
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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 org.codefeedr.buffer.serialization.schema_exposure
import org.apache.avro.Schema
/** The goal of the SchemaExposer is to expose the data type externally */
trait SchemaExposer {
/** Stores a schema bound to a subject.
*
* @param schema The schema belonging to that topic.
* @param subject The subject belonging to that schema.
* @return True if correctly saved.
*/
def put(schema: Schema, subject: String): Boolean
/** Get a schema based on a subject.
*
* @param subject The subject the schema belongs to.
* @return None if no schema is found or an invalid schema. Otherwise it returns the schema.
*/
def get(subject: String): Option[Schema]
/** Deletes a Schema.
*
* @param subject The subject the schema belongs to.
* @return True if successfully deleted, otherwise false.
*/
def delete(subject: String): Boolean
/** Deletes all schemas. */
def deleteAll()
/** Tries to parse a String into a Schema.
*
* @param schemaString The schema string.
* @return An option of a Schema.
*/
def parse(schemaString: String): Option[Schema] = {
try {
val schema = new Schema.Parser().parse(schemaString)
Some(schema)
} catch {
case _: Throwable => None
}
}
}