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TestDataInputDeserializer.java
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TestDataInputDeserializer.java
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package it.okkam.flink.aci;
import de.javakaffee.kryoserializers.jodatime.JodaDateTimeSerializer;
import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.common.functions.RichGroupReduceFunction;
import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.LocalEnvironment;
import org.apache.flink.api.java.typeutils.RowTypeInfo;
import org.apache.flink.configuration.ConfigConstants;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.types.Row;
import org.apache.flink.util.Collector;
import org.joda.time.DateTime;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
public class TestDataInputDeserializer {
@Test
@SuppressWarnings("serial")
public void test() throws Exception {
ExecutionEnvironment env = getExecutionEnv();
List<Row> rowList = generateSampleRows();
DataSet<Row> rows = env.fromCollection(rowList, new RowTypeInfo(ft))
.flatMap(new FlatMapFunction<Row, Row>() {
@Override
public void flatMap(Row row, Collector<Row> out) throws Exception {
// multiply test rows
for (int i = 0; i < 100; i++) {
row.setField(0, generateLongString());
out.collect(row);
}
}
}).returns(new RowTypeInfo(ft))
.rebalance()
.groupBy(x -> (Long) x.getField(15)) //
.reduceGroup(new RichGroupReduceFunction<Row, Row>() {
@Override
public void reduce(Iterable<Row> it, Collector<Row> out) throws Exception {
final UUID uuid = UUID.randomUUID();
for (Row row : it) {
row.setField(1, "http://" + uuid);
out.collect(row);
}
}
});
rows.print();
}
private TypeInformation<?>[] ft = new TypeInformation<?>[] { BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.BOOLEAN_TYPE_INFO,
BasicTypeInfo.LONG_TYPE_INFO, BasicTypeInfo.LONG_TYPE_INFO, BasicTypeInfo.LONG_TYPE_INFO,
BasicTypeInfo.INT_TYPE_INFO, BasicTypeInfo.INT_TYPE_INFO, BasicTypeInfo.LONG_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.LONG_TYPE_INFO,
BasicTypeInfo.LONG_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.LONG_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO };
private static String generateLongString() {
final StringBuilder str = new StringBuilder(
"AAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA " + ":AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA::?");
for (int j = 0; j < 12; j++) {
str.append(str);
}
final String longString = str.toString();
return longString;
}
private List<Row> generateSampleRows() {
final int NUM_RECORDS = 100;
List<Row> rowList = new ArrayList<>();
for (int i = 0; i < NUM_RECORDS; i++) {
Row row = new Row(ft.length);
for (int j = 0; j < ft.length; j++) {
if (ft[j].getTypeClass().equals(String.class)) {
if (i % 2 == 0) {
//sometimes set a null value
row.setField(j, null);
} else {
StringBuilder longString = new StringBuilder("Test " + j);
for (int k = 0; k < 15; k++) {
longString.append(longString);
}
row.setField(j, longString.toString());
}
} else if (ft[j].getTypeClass().equals(Integer.class)) {
row.setField(j, new Integer(j));
} else if (ft[j].getTypeClass().equals(Long.class)) {
row.setField(j, new Long(j * 2));
} else if (ft[j].getTypeClass().equals(Boolean.class)) {
row.setField(j, i % 2 == 0);
} else {
throw new IllegalArgumentException("Not handled type: " + ft[j]);
}
}
rowList.add(row);
}
return rowList;
}
protected static ExecutionEnvironment getExecutionEnv() {
// SLF4JBridgeHandler.install();// Parquet use java.util.logging (jul)
ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
if (env instanceof LocalEnvironment) {
Configuration conf = new Configuration();
conf.setString(ConfigConstants.TASK_MANAGER_TMP_DIR_KEY, "/tmp/flink");
conf.setString(ConfigConstants.BLOB_STORAGE_DIRECTORY_KEY, "/tmp/flink");
conf.setLong(ConfigConstants.TASK_MANAGER_NETWORK_NUM_BUFFERS_KEY, 2048 * 2);
conf.setInteger(ConfigConstants.LOCAL_NUMBER_TASK_MANAGER, 2);
conf.setInteger(ConfigConstants.TASK_MANAGER_NUM_TASK_SLOTS, 2);
env = ExecutionEnvironment.createLocalEnvironment(conf);
env.setParallelism(2);
}
env.registerTypeWithKryoSerializer(DateTime.class, JodaDateTimeSerializer.class);
return env;
}
}