Java Code Examples for org.apache.flink.api.java.DataSet#aggregate()

The following examples show how to use org.apache.flink.api.java.DataSet#aggregate() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: AggregateOperatorTest.java    From Flink-CEPplus with Apache License 2.0 6 votes vote down vote up 
@Test
public void testAggregationTypes() {
	try {
		final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
		DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);

		// should work: multiple aggregates
		tupleDs.aggregate(Aggregations.SUM, 0).and(Aggregations.MIN, 4);

		// should work: nested aggregates
		tupleDs.aggregate(Aggregations.MIN, 2).aggregate(Aggregations.SUM, 1);

		// should not work: average on string
		try {
			tupleDs.aggregate(Aggregations.SUM, 2);
			Assert.fail();
		} catch (UnsupportedAggregationTypeException iae) {
			// we're good here
		}
	}
	catch (Exception e) {
		System.err.println(e.getMessage());
		e.printStackTrace();
		Assert.fail(e.getMessage());
	}
}
Example 2
Source File: AggregateOperatorTest.java    From flink with Apache License 2.0 6 votes vote down vote up 
@Test
public void testAggregationTypes() {
	try {
		final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
		DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);

		// should work: multiple aggregates
		tupleDs.aggregate(Aggregations.SUM, 0).and(Aggregations.MIN, 4);

		// should work: nested aggregates
		tupleDs.aggregate(Aggregations.MIN, 2).aggregate(Aggregations.SUM, 1);

		// should not work: average on string
		try {
			tupleDs.aggregate(Aggregations.SUM, 2);
			Assert.fail();
		} catch (UnsupportedAggregationTypeException iae) {
			// we're good here
		}
	}
	catch (Exception e) {
		System.err.println(e.getMessage());
		e.printStackTrace();
		Assert.fail(e.getMessage());
	}
}
Example 3
Source File: AggregateOperatorTest.java    From flink with Apache License 2.0 6 votes vote down vote up 
@Test
public void testAggregationTypes() {
	try {
		final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
		DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);

		// should work: multiple aggregates
		tupleDs.aggregate(Aggregations.SUM, 0).and(Aggregations.MIN, 4);

		// should work: nested aggregates
		tupleDs.aggregate(Aggregations.MIN, 2).aggregate(Aggregations.SUM, 1);

		// should not work: average on string
		try {
			tupleDs.aggregate(Aggregations.SUM, 2);
			Assert.fail();
		} catch (UnsupportedAggregationTypeException iae) {
			// we're good here
		}
	}
	catch (Exception e) {
		System.err.println(e.getMessage());
		e.printStackTrace();
		Assert.fail(e.getMessage());
	}
}