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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.kafka.connect.tools;
import org.apache.kafka.connect.data.Schema;
import org.apache.kafka.connect.data.SchemaBuilder;
import org.apache.kafka.connect.data.Struct;
import org.apache.kafka.connect.errors.ConnectException;
import org.apache.kafka.connect.source.SourceRecord;
import org.apache.kafka.connect.source.SourceTask;
import org.apache.kafka.tools.ThroughputThrottler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
public class SchemaSourceTask extends SourceTask {
private static final Logger log = LoggerFactory.getLogger(SchemaSourceTask.class);
public static final String NAME_CONFIG = "name";
public static final String ID_CONFIG = "id";
public static final String TOPIC_CONFIG = "topic";
public static final String NUM_MSGS_CONFIG = "num.messages";
public static final String THROUGHPUT_CONFIG = "throughput";
public static final String MULTIPLE_SCHEMA_CONFIG = "multiple.schema";
public static final String PARTITION_COUNT_CONFIG = "partition.count";
private static final String ID_FIELD = "id";
private static final String SEQNO_FIELD = "seqno";
private ThroughputThrottler throttler;
private String name; // Connector name
private int id; // Task ID
private String topic;
private Map partition;
private long startingSeqno;
private long seqno;
private long count;
private long maxNumMsgs;
private boolean multipleSchema;
private int partitionCount;
private static Schema valueSchema = SchemaBuilder.struct().version(1).name("record")
.field("boolean", Schema.BOOLEAN_SCHEMA)
.field("int", Schema.INT32_SCHEMA)
.field("long", Schema.INT64_SCHEMA)
.field("float", Schema.FLOAT32_SCHEMA)
.field("double", Schema.FLOAT64_SCHEMA)
.field("partitioning", Schema.INT32_SCHEMA)
.field("id", Schema.INT32_SCHEMA)
.field("seqno", Schema.INT64_SCHEMA)
.build();
private static Schema valueSchema2 = SchemaBuilder.struct().version(2).name("record")
.field("boolean", Schema.BOOLEAN_SCHEMA)
.field("int", Schema.INT32_SCHEMA)
.field("long", Schema.INT64_SCHEMA)
.field("float", Schema.FLOAT32_SCHEMA)
.field("double", Schema.FLOAT64_SCHEMA)
.field("partitioning", Schema.INT32_SCHEMA)
.field("string", SchemaBuilder.string().defaultValue("abc").build())
.field("id", Schema.INT32_SCHEMA)
.field("seqno", Schema.INT64_SCHEMA)
.build();
@Override
public String version() {
return new SchemaSourceConnector().version();
}
@Override
public void start(Map props) {
final long throughput;
try {
name = props.get(NAME_CONFIG);
id = Integer.parseInt(props.get(ID_CONFIG));
topic = props.get(TOPIC_CONFIG);
maxNumMsgs = Long.parseLong(props.get(NUM_MSGS_CONFIG));
multipleSchema = Boolean.parseBoolean(props.get(MULTIPLE_SCHEMA_CONFIG));
partitionCount = Integer.parseInt(props.containsKey(PARTITION_COUNT_CONFIG) ? props.get(PARTITION_COUNT_CONFIG) : "1");
throughput = Long.parseLong(props.get(THROUGHPUT_CONFIG));
} catch (NumberFormatException e) {
throw new ConnectException("Invalid SchemaSourceTask configuration", e);
}
throttler = new ThroughputThrottler(throughput, System.currentTimeMillis());
partition = Collections.singletonMap(ID_FIELD, id);
Map previousOffset = this.context.offsetStorageReader().offset(partition);
if (previousOffset != null) {
seqno = (Long) previousOffset.get(SEQNO_FIELD) + 1;
} else {
seqno = 0;
}
startingSeqno = seqno;
count = 0;
log.info("Started SchemaSourceTask {}-{} producing to topic {} resuming from seqno {}", name, id, topic, startingSeqno);
}
@Override
public List poll() throws InterruptedException {
if (count < maxNumMsgs) {
long sendStartMs = System.currentTimeMillis();
if (throttler.shouldThrottle(seqno - startingSeqno, sendStartMs)) {
throttler.throttle();
}
Map ccOffset = Collections.singletonMap(SEQNO_FIELD, seqno);
int partitionVal = (int) (seqno % partitionCount);
final Struct data;
final SourceRecord srcRecord;
if (!multipleSchema || count % 2 == 0) {
data = new Struct(valueSchema)
.put("boolean", true)
.put("int", 12)
.put("long", 12L)
.put("float", 12.2f)
.put("double", 12.2)
.put("partitioning", partitionVal)
.put("id", id)
.put("seqno", seqno);
srcRecord = new SourceRecord(partition, ccOffset, topic, id, Schema.STRING_SCHEMA, "key", valueSchema, data);
} else {
data = new Struct(valueSchema2)
.put("boolean", true)
.put("int", 12)
.put("long", 12L)
.put("float", 12.2f)
.put("double", 12.2)
.put("partitioning", partitionVal)
.put("string", "def")
.put("id", id)
.put("seqno", seqno);
srcRecord = new SourceRecord(partition, ccOffset, topic, id, Schema.STRING_SCHEMA, "key", valueSchema2, data);
}
System.out.println("{\"task\": " + id + ", \"seqno\": " + seqno + "}");
List result = Collections.singletonList(srcRecord);
seqno++;
count++;
return result;
} else {
throttler.throttle();
return new ArrayList<>();
}
}
@Override
public void stop() {
throttler.wakeup();
}
}
