org.apache.flink.connector.pulsar.source.offset.TimestampStartOffsetInitializer 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.connector.pulsar.source.offset;
import org.apache.flink.connector.pulsar.source.AbstractPartition;
import org.apache.flink.connector.pulsar.source.StartOffsetInitializer;
import org.apache.pulsar.client.api.Consumer;
import org.apache.pulsar.client.api.Message;
import org.apache.pulsar.client.api.MessageId;
import org.apache.pulsar.client.api.PulsarClientException;
import java.util.Optional;
import java.util.function.Supplier;
/**
* An implementation of {@link StartOffsetInitializer} to initialize the offsets
* based on a timestamp.
*
* Should be initialized through {@link StartOffsetInitializer}.
*/
public class TimestampStartOffsetInitializer implements StartOffsetInitializer {
private static final long serialVersionUID = 2932230571773627233L;
private final long startingTimestamp;
public TimestampStartOffsetInitializer(long startingTimestamp) {
this.startingTimestamp = startingTimestamp;
}
@Override
public void initializeAfterCreation(AbstractPartition partition, Consumer consumer) throws PulsarClientException {
consumer.seek(startingTimestamp);
}
@Override
public Optional verifyOffset(
AbstractPartition partition,
Supplier> lastMessageIdFetcher,
Supplier>> firstMessageFetcher) {
return firstMessageFetcher.get().isPresent() ?
Optional.empty() :
Optional.of(String.format("No data found after timestamp %s", startingTimestamp));
}
}