org.apache.flink.streaming.connectors.pulsar.internal.AvroSer Maven / Gradle / Ivy
/*
* Licensed 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.apache.flink.streaming.connectors.pulsar.internal;
import org.apache.flink.api.common.serialization.SerializationSchema;
import org.apache.flink.util.Preconditions;
import org.apache.pulsar.client.impl.schema.AvroSchema;
/**
* Read Avro encoded data from Pulsar.
* @param the type of record class.
*/
public class AvroSer implements SerializationSchema {
private final Class recordClazz;
private transient AvroSchema pulsarSchema;
private AvroSer(Class recordClazz) {
Preconditions.checkNotNull(recordClazz, "Avro record class must not be null");
this.recordClazz = recordClazz;
}
public static AvroSer of(Class recordClazz) {
return new AvroSer<>(recordClazz);
}
@Override
public byte[] serialize(T message){
checkPulsarAvroSchemaInitialized();
return pulsarSchema.encode(message);
}
private void checkPulsarAvroSchemaInitialized() {
if (pulsarSchema != null) {
return;
}
this.pulsarSchema = AvroSchema.of(recordClazz);
}
}