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MessageIdStopCursor.java
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MessageIdStopCursor.java
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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.apache.flink.connector.pulsar.source.enumerator.cursor.stop;
import org.apache.flink.connector.pulsar.source.enumerator.cursor.StopCursor;
import org.apache.pulsar.client.api.Message;
import org.apache.pulsar.client.api.MessageId;
import java.util.Objects;
import static org.apache.flink.util.Preconditions.checkArgument;
import static org.apache.pulsar.client.api.MessageId.earliest;
import static org.apache.pulsar.client.api.MessageId.latest;
/**
* Stop consuming message at a given message id. We use the {@link MessageId#compareTo(Object)} for
* compare the consuming message with the given message id.
*/
public class MessageIdStopCursor implements StopCursor {
private static final long serialVersionUID = -3990454110809274542L;
private final MessageId messageId;
private final boolean inclusive;
public MessageIdStopCursor(MessageId messageId, boolean inclusive) {
checkArgument(!earliest.equals(messageId), "MessageId.earliest is not supported.");
checkArgument(!latest.equals(messageId), "Use LatestMessageStopCursor instead.");
this.inclusive = inclusive;
this.messageId = messageId;
}
@Override
public StopCondition shouldStop(Message<?> message) {
MessageId current = message.getMessageId();
return StopCondition.compare(messageId, current, inclusive);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
MessageIdStopCursor that = (MessageIdStopCursor) o;
return inclusive == that.inclusive && Objects.equals(messageId, that.messageId);
}
@Override
public int hashCode() {
return Objects.hash(messageId, inclusive);
}
}