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[db2] Fix stream api example in db2 doc. #1725

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Nov 9, 2022
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[db2] Fix stream api example in db2 doc. #1725

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40 changes: 20 additions & 20 deletions docs/content/connectors/db2-cdc.md
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Expand Up @@ -50,8 +50,8 @@ Notes

### Not support BOOLEAN type in SQL Replication on Db2

Only snapshots can be taken from tables with BOOLEAN type columns. Currently SQL Replication on Db2 does not support BOOLEAN, so Debezium can not perform CDC on those tables.
Consider using a different type.
Only snapshots can be taken from tables with BOOLEAN type columns. Currently, SQL Replication on Db2 does not support BOOLEAN, so Debezium can not perform CDC on those tables.
Consider using another type to replace BOOLEAN type.


How to create a Db2 CDC table
Expand Down Expand Up @@ -203,36 +203,36 @@ _Note: the mechanism of `scan.startup.mode` option relying on Debezium's `snapsh
### DataStream Source

```java
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.kafka.connect.source.SourceRecord;
import org.apache.flink.streaming.api.functions.source.SourceFunction;

import com.ververica.cdc.debezium.JsonDebeziumDeserializationSchema;
import com.ververica.cdc.connectors.db2.Db2Source;

public class Db2SourceExample {
public static void main(String[] args) throws Exception {
Db2Source<SourceRecord> db2Source = Db2Source.<SourceRecord>builder()
.hostname("yourHostname")
.port(yourPort)
.database("yourDatabaseName") // set captured database
.tableList("yourSchemaName.yourTableName") // set captured table
.username("yourUsername")
.password("yourPassword")
.deserializer(new JsonDebeziumDeserializationSchema()) // converts SourceRecord to JSON String
.build();
SourceFunction<String> db2Source =
Db2Source.<String>builder()
.hostname("yourHostname")
.port(50000)
.database("yourDatabaseName") // set captured database
.tableList("yourSchemaName.yourTableName") // set captured table
.username("yourUsername")
.password("yourPassword")
.deserializer(
new JsonDebeziumDeserializationSchema()) // converts SourceRecord to
// JSON String
.build();

StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

// enable checkpoint
env.enableCheckpointing(3000);

env
.fromSource(db2Source, WatermarkStrategy.noWatermarks(), "Db2 Source")
// set 4 parallel source tasks
.setParallelism(1)
.print().setParallelism(1); // use parallelism 1 for sink to keep message ordering
env.addSource(db2Source)
.print()
.setParallelism(1); // use parallelism 1 for sink to keep message ordering

env.execute("Print Db2 Snapshot + Binlog");
env.execute("Print Db2 Snapshot + Change Stream");
}
}
```
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2 changes: 1 addition & 1 deletion flink-connector-db2-cdc/src/test/java/com/ververica/cdc/connectors/db2/Db2SourceTest.java
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Expand Up @@ -294,7 +294,7 @@ public void go() throws Exception {
assertDelete(records.get(0), "ID", 1001);

// ---------------------------------------------------------------------------
// Step-6: trigger checkpoint-2 to make sure we can continue to to further checkpoints
// Step-6: trigger checkpoint-2 to make sure we can continue to further checkpoints
// ---------------------------------------------------------------------------
synchronized (sourceContext3.getCheckpointLock()) {
// checkpoint 3
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