kafka MockSinkTask 源码

kafka MockSinkTask 代码

文件路径：/connect/runtime/src/main/java/org/apache/kafka/connect/tools/MockSinkTask.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.tools;

import org.apache.kafka.clients.consumer.OffsetAndMetadata;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.utils.AppInfoParser;
import org.apache.kafka.connect.sink.SinkRecord;
import org.apache.kafka.connect.sink.SinkTask;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Collection;
import java.util.Map;

public class MockSinkTask extends SinkTask {
    private static final Logger log = LoggerFactory.getLogger(MockSinkTask.class);

    private String mockMode;
    private long startTimeMs;
    private long failureDelayMs;

    @Override
    public String version() {
        return AppInfoParser.getVersion();
    }

    @Override
    public void start(Map<String, String> config) {
        this.mockMode = config.get(MockConnector.MOCK_MODE_KEY);

        if (MockConnector.TASK_FAILURE.equals(mockMode)) {
            this.startTimeMs = System.currentTimeMillis();

            String delayMsString = config.get(MockConnector.DELAY_MS_KEY);
            this.failureDelayMs = MockConnector.DEFAULT_FAILURE_DELAY_MS;
            if (delayMsString != null)
                failureDelayMs = Long.parseLong(delayMsString);

            log.debug("Started MockSinkTask at {} with failure scheduled in {} ms", startTimeMs, failureDelayMs);
            setTimeout();
        }
    }

    @Override
    public void put(Collection<SinkRecord> records) {
        if (MockConnector.TASK_FAILURE.equals(mockMode)) {
            long now = System.currentTimeMillis();
            if (now - startTimeMs > failureDelayMs) {
                log.debug("Triggering sink task failure");
                throw new RuntimeException();
            }
            setTimeout();
        }
    }

    @Override
    public void flush(Map<TopicPartition, OffsetAndMetadata> offsets) {

    }

    @Override
    public void stop() {

    }

    private void setTimeout() {
        // Set a reasonable minimum delay. Since this mock task may not actually consume any data from Kafka, it may only
        // see put() calls triggered by wakeups for offset commits. To make sure we aren't tied to the offset commit
        // interval, we force a wakeup every 250ms or after the failure delay, whichever is smaller. This is not overly
        // aggressive but ensures any scheduled tasks this connector performs are reasonably close to the target time.
        context.timeout(Math.min(failureDelayMs, 250));
    }
}

相关信息

kafka 源码目录

相关文章

kafka MockConnector 源码

kafka MockSinkConnector 源码

kafka MockSourceConnector 源码

kafka MockSourceTask 源码

kafka PredicateDoc 源码

kafka SchemaSourceConnector 源码

kafka SchemaSourceTask 源码

kafka TransformationDoc 源码

kafka VerifiableSinkConnector 源码

kafka VerifiableSinkTask 源码