kafka Predicate 源码
kafka Predicate 代码
文件路径：/connect/api/src/main/java/org/apache/kafka/connect/transforms/predicates/Predicate.java
/*
* 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.kafka.connect.transforms.predicates;
import org.apache.kafka.common.Configurable;
import org.apache.kafka.common.config.ConfigDef;
import org.apache.kafka.connect.connector.ConnectRecord;
/**
* <p>A predicate on records.
* Predicates can be used to conditionally apply a {@link org.apache.kafka.connect.transforms.Transformation}
* by configuring the transformation's {@code predicate} (and {@code negate}) configuration parameters.
* In particular, the {@code Filter} transformation can be conditionally applied in order to filter
* certain records from further processing.
*
* <p>Implementations of this interface must be public and have a public constructor with no parameters.
*
* @param <R> The type of record.
*/
public interface Predicate<R extends ConnectRecord<R>> extends Configurable, AutoCloseable {
/**
* Configuration specification for this predicate.
*
* @return the configuration definition for this predicate; never null
*/
ConfigDef config();
/**
* Returns whether the given record satisfies this predicate.
*
* @param record the record to evaluate; may not be null
* @return true if the predicate matches, or false otherwise
*/
boolean test(R record);
@Override
void close();
}
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