org.apache.flink.streaming.util.serialization.PulsarDeserializationSchemaWrapper 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.util.serialization;
import org.apache.flink.api.common.serialization.DeserializationSchema;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.table.types.DataType;
import org.apache.pulsar.client.api.Message;
import org.apache.pulsar.client.api.Schema;
import org.apache.pulsar.client.impl.schema.BytesSchema;
import org.apache.pulsar.common.schema.SchemaInfo;
import java.io.IOException;
import java.util.Optional;
import static org.apache.flink.util.Preconditions.checkNotNull;
/**
* An interface for the deserialization of Pulsar messages.
*
* @deprecated {@link PulsarDeserializationSchema#valueOnly(DeserializationSchema)}
*/
@Deprecated
public class PulsarDeserializationSchemaWrapper implements PulsarDeserializationSchema, PulsarContextAware {
private final DeserializationSchema deSerializationSchema;
@Deprecated
public PulsarDeserializationSchemaWrapper(DeserializationSchema deSerializationSchema, DataType dataType) {
this.deSerializationSchema = ThreadSafeDeserializationSchema.of(checkNotNull(deSerializationSchema));
}
@Deprecated
public PulsarDeserializationSchemaWrapper(DeserializationSchema deSerializationSchema) {
this.deSerializationSchema = ThreadSafeDeserializationSchema.of(checkNotNull(deSerializationSchema));
}
@Override
public Optional getTargetTopic(T element) {
return Optional.empty();
}
@Override
public Schema getSchema() {
SchemaInfo si = BytesSchema.of().getSchemaInfo();
return new FlinkSchema<>(si, null, deSerializationSchema);
}
@Override
public TypeInformation getProducedType() {
return deSerializationSchema.getProducedType();
}
@Override
public void open(DeserializationSchema.InitializationContext context) throws Exception {
deSerializationSchema.open(context);
}
@Override
public boolean isEndOfStream(T nextElement) {
return false;
}
@Override
public T deserialize(Message message) throws IOException {
return message.getValue();
}
}