Examples with RichMapPartitionFunction org.apache.flink.api.common.functions.RichMapPartitionFunction used on opensource projects

Example 1 with RichMapPartitionFunction

use of org.apache.flink.api.common.functions.RichMapPartitionFunction in project flink by apache.

the class PartitionMapOperatorTest method testMapPartitionWithRuntimeContext.

@Test
public void testMapPartitionWithRuntimeContext() {
    try {
        final String taskName = "Test Task";
        final AtomicBoolean opened = new AtomicBoolean();
        final AtomicBoolean closed = new AtomicBoolean();
        final MapPartitionFunction<String, Integer> parser = new RichMapPartitionFunction<String, Integer>() {

            @Override
            public void open(Configuration parameters) throws Exception {
                opened.set(true);
                RuntimeContext ctx = getRuntimeContext();
                assertEquals(0, ctx.getIndexOfThisSubtask());
                assertEquals(1, ctx.getNumberOfParallelSubtasks());
                assertEquals(taskName, ctx.getTaskName());
            }

            @Override
            public void mapPartition(Iterable<String> values, Collector<Integer> out) {
                for (String s : values) {
                    out.collect(Integer.parseInt(s));
                }
            }

            @Override
            public void close() throws Exception {
                closed.set(true);
            }
        };
        MapPartitionOperatorBase<String, Integer, MapPartitionFunction<String, Integer>> op = new MapPartitionOperatorBase<String, Integer, MapPartitionFunction<String, Integer>>(parser, new UnaryOperatorInformation<String, Integer>(BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.INT_TYPE_INFO), taskName);
        List<String> input = new ArrayList<String>(asList("1", "2", "3", "4", "5", "6"));
        final TaskInfo taskInfo = new TaskInfo(taskName, 1, 0, 1, 0);
        ExecutionConfig executionConfig = new ExecutionConfig();
        executionConfig.disableObjectReuse();
        List<Integer> resultMutableSafe = op.executeOnCollections(input, new RuntimeUDFContext(taskInfo, null, executionConfig, new HashMap<String, Future<Path>>(), new HashMap<String, Accumulator<?, ?>>(), new UnregisteredMetricsGroup()), executionConfig);
        executionConfig.enableObjectReuse();
        List<Integer> resultRegular = op.executeOnCollections(input, new RuntimeUDFContext(taskInfo, null, executionConfig, new HashMap<String, Future<Path>>(), new HashMap<String, Accumulator<?, ?>>(), new UnregisteredMetricsGroup()), executionConfig);
        assertEquals(asList(1, 2, 3, 4, 5, 6), resultMutableSafe);
        assertEquals(asList(1, 2, 3, 4, 5, 6), resultRegular);
        assertTrue(opened.get());
        assertTrue(closed.get());
    } catch (Exception e) {
        e.printStackTrace();
        fail(e.getMessage());
    }
}