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)

  @Test(expected = IllegalArgumentException.class)
  public void testCoGroupKeyFields6() {
    
    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
    DataSet<CustomType> ds2 = env.fromCollection(customTypeData);


    // should not work, cogroup key fields on custom type
    ds1.coGroup(ds2).where(5).equalTo(0);
  }

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  @Test
  public void testCoGroupKeyExpressions1() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
    DataSet<CustomType> ds2 = env.fromCollection(customTypeData);


    // should work
    try {
      ds1.coGroup(ds2).where("myInt").equalTo("myInt");

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  @Test
  public void testCoGroupKeyExpressions1() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
    DataSet<CustomType> ds2 = env.fromCollection(customTypeData);


    // should work
    try {
      ds1.coGroup(ds2).where("myInt").equalTo("myInt");
    } catch(Exception e) {

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  @Test(expected = InvalidProgramException.class)
  public void testCoGroupKeyExpressions2() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
    DataSet<CustomType> ds2 = env.fromCollection(customTypeData);


    // should not work, incompatible cogroup key types
    ds1.coGroup(ds2).where("myInt").equalTo("myString");
  }

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  @Test(expected = InvalidProgramException.class)
  public void testCoGroupKeyExpressions2() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
    DataSet<CustomType> ds2 = env.fromCollection(customTypeData);


    // should not work, incompatible cogroup key types
    ds1.coGroup(ds2).where("myInt").equalTo("myString");
  }

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  @Test(expected = InvalidProgramException.class)
  public void testCoGroupKeyExpressions3() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
    DataSet<CustomType> ds2 = env.fromCollection(customTypeData);


    // should not work, incompatible number of cogroup keys
    ds1.coGroup(ds2).where("myInt", "myString").equalTo("myString");
  }

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  @Test(expected = InvalidProgramException.class)
  public void testCoGroupKeyExpressions3() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
    DataSet<CustomType> ds2 = env.fromCollection(customTypeData);


    // should not work, incompatible number of cogroup keys
    ds1.coGroup(ds2).where("myInt", "myString").equalTo("myString");
  }

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  @Test(expected = IllegalArgumentException.class)
  public void testCoGroupKeyExpressions4() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
    DataSet<CustomType> ds2 = env.fromCollection(customTypeData);


    // should not work, cogroup key non-existent
    ds1.coGroup(ds2).where("myNonExistent").equalTo("myInt");
  }

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  @Test(expected = IllegalArgumentException.class)
  public void testCoGroupKeyExpressions4() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
    DataSet<CustomType> ds2 = env.fromCollection(customTypeData);


    // should not work, cogroup key non-existent
    ds1.coGroup(ds2).where("myNonExistent").equalTo("myInt");
  }

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  @Test
  public void testCoGroupKeyExpressions1Nested() {


    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
    DataSet<CustomType> ds2 = env.fromCollection(customTypeData);


    // should work
    try {
      ds1.coGroup(ds2).where("nested.myInt").equalTo("nested.myInt");

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