org.apache.hadoop.hbase.client.ScanResultConsumerBase Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* 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,
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* See the License for the specific language governing permissions and
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*/
package org.apache.hadoop.hbase.client;
import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
import org.apache.yetus.audience.InterfaceAudience;
/**
* The base interface for scan result consumer.
*/
@InterfaceAudience.Public
public interface ScanResultConsumerBase {
/**
* Indicate that we hit an unrecoverable error and the scan operation is terminated.
*
* We will not call {@link #onComplete()} after calling {@link #onError(Throwable)}.
*/
void onError(Throwable error);
/**
* Indicate that the scan operation is completed normally.
*/
void onComplete();
/**
* If {@code scan.isScanMetricsEnabled()} returns true, then this method will be called prior to
* all other methods in this interface to give you the {@link ScanMetrics} instance for this scan
* operation. The {@link ScanMetrics} instance will be updated on-the-fly during the scan, you can
* store it somewhere to get the metrics at any time if you want.
*/
default void onScanMetricsCreated(ScanMetrics scanMetrics) {
}
}