Examples of org.apache.flink.api.java.ExecutionEnvironment.fromCollection()

Class org.apache.flink.api.java.ExecutionEnvironment

Examples of org.apache.flink.api.java.ExecutionEnvironment.fromCollection()

org.apache.flink.api.java.ExecutionEnvironment.fromCollection()
Creates a DataSet from the given non-empty collection. The type of the data set is that of the elements in the collection. The elements need to be serializable (as defined by {@link java.io.Serializable}), because the framework may move the elements into the cluster if needed.
The framework will try and determine the exact type from the collection elements. In case of generic elements, it may be necessary to manually supply the type information via {@link #fromCollection(Collection,TypeInformation)}.
Note that this operation will result in a non-parallel data source, i.e. a data source with a degree of parallelism of one. @param data The collection of elements to create the data set from. @return A DataSet representing the given collection. @see #fromCollection(Collection,TypeInformation)


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    
    this.customTypeData.add(new CustomType());
    
    DataSet<CustomType> customDs = env.fromCollection(customTypeData);
    // should not work: groups on custom type
    customDs.maxBy(0);
  }
  
  /**

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   */
  @Test(expected = IndexOutOfBoundsException.class)
  public void testOutOfTupleBoundsDataset1() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);


    // should not work, key out of tuple bounds
    tupleDs.maxBy(5);
  }

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   */
  @Test(expected = IndexOutOfBoundsException.class)
  public void testOutOfTupleBoundsDataset2() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);


    // should not work, key out of tuple bounds
    tupleDs.maxBy(-1);
  }

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   */
  @Test(expected = IndexOutOfBoundsException.class)
  public void testOutOfTupleBoundsDataset3() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);


    // should not work, key out of tuple bounds
    tupleDs.maxBy(1,2,3,4,-1);
  }

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   */
  @Test
  public void testMaxByKeyFieldsGrouping() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    UnsortedGrouping<Tuple5<Integer, Long, String, Long, Integer>> groupDs = env.fromCollection(emptyTupleData, tupleTypeInfo).groupBy(0);


    // should work
    try {
      groupDs.maxBy(4, 0, 1, 2, 3);
    } catch (Exception e) {

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    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    
    this.customTypeData.add(new CustomType());
    
    UnsortedGrouping<CustomType> groupDs = env.fromCollection(customTypeData).groupBy(0);
    // should not work: groups on custom type
    groupDs.maxBy(0);
  }
  
  /**

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   */
  @Test(expected = IndexOutOfBoundsException.class)
  public void testOutOfTupleBoundsGrouping1() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    UnsortedGrouping<Tuple5<Integer, Long, String, Long, Integer>> groupDs = env.fromCollection(emptyTupleData, tupleTypeInfo).groupBy(0);


    // should not work, key out of tuple bounds
    groupDs.maxBy(5);
  }

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   */
  @Test(expected = IndexOutOfBoundsException.class)
  public void testOutOfTupleBoundsGrouping2() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    UnsortedGrouping<Tuple5<Integer, Long, String, Long, Integer>> groupDs = env.fromCollection(emptyTupleData, tupleTypeInfo).groupBy(0);


    // should not work, key out of tuple bounds
    groupDs.maxBy(-1);
  }

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   */
  @Test(expected = IndexOutOfBoundsException.class)
  public void testOutOfTupleBoundsGrouping3() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    UnsortedGrouping<Tuple5<Integer, Long, String, Long, Integer>> groupDs = env.fromCollection(emptyTupleData, tupleTypeInfo).groupBy(0);


    // should not work, key out of tuple bounds
    groupDs.maxBy(1,2,3,4,-1);
  }

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  @Test
  public void testUngroupedFirstN() {
    
    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);


    // should work
    try {
      tupleDs.first(1);
    } catch(Exception e) {

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