Examples with OperatorState org.apache.flink.runtime.checkpoint.OperatorState used on opensource projects

Example 46 with OperatorState

use of org.apache.flink.runtime.checkpoint.OperatorState in project flink by apache.

the class SavepointReader method readBroadcastState.

/**
 * Read operator {@code BroadcastState} from a {@code Savepoint} when a custom serializer was
 * used; e.g., a different serializer than the one returned by {@code
 * TypeInformation#createSerializer}.
 *
 * @param uid The uid of the operator.
 * @param name The (unique) name for the state.
 * @param keyTypeInfo The type information for the keys in the state.
 * @param valueTypeInfo The type information for the values in the state.
 * @param keySerializer The type serializer used to write keys into the state.
 * @param valueSerializer The type serializer used to write values into the state.
 * @param <K> The type of keys in state.
 * @param <V> The type of values in state.
 * @return A {@code DataStream} of key-value pairs from state.
 * @throws IOException If the savepoint path is invalid or the uid does not exist.
 */
public <K, V> DataStream<Tuple2<K, V>> readBroadcastState(String uid, String name, TypeInformation<K> keyTypeInfo, TypeInformation<V> valueTypeInfo, TypeSerializer<K> keySerializer, TypeSerializer<V> valueSerializer) throws IOException {
    OperatorState operatorState = metadata.getOperatorState(uid);
    MapStateDescriptor<K, V> descriptor = new MapStateDescriptor<>(name, keySerializer, valueSerializer);
    BroadcastStateInputFormat<K, V> inputFormat = new BroadcastStateInputFormat<>(operatorState, MutableConfig.of(env.getConfiguration()), stateBackend, descriptor);
    return SourceBuilder.fromFormat(env, inputFormat, new TupleTypeInfo<>(keyTypeInfo, valueTypeInfo));
}

Example 47 with OperatorState

use of org.apache.flink.runtime.checkpoint.OperatorState in project flink by apache.

the class SavepointReader method readListState.

/**
 * Read operator {@code ListState} from a {@code Savepoint}.
 *
 * @param uid The uid of the operator.
 * @param name The (unique) name for the state.
 * @param typeInfo The type of the elements in the state.
 * @param <T> The type of the values that are in the list state.
 * @return A {@code DataStream} representing the elements in state.
 * @throws IOException If the savepoint path is invalid or the uid does not exist.
 */
public <T> DataStream<T> readListState(String uid, String name, TypeInformation<T> typeInfo) throws IOException {
    OperatorState operatorState = metadata.getOperatorState(uid);
    ListStateDescriptor<T> descriptor = new ListStateDescriptor<>(name, typeInfo);
    ListStateInputFormat<T> inputFormat = new ListStateInputFormat<>(operatorState, MutableConfig.of(env.getConfiguration()), stateBackend, descriptor);
    return SourceBuilder.fromFormat(env, inputFormat, typeInfo);
}

Example 48 with OperatorState

use of org.apache.flink.runtime.checkpoint.OperatorState in project flink by apache.

the class SavepointReader method readUnionState.

/**
 * Read operator {@code UnionState} from a {@code Savepoint}.
 *
 * @param uid The uid of the operator.
 * @param name The (unique) name for the state.
 * @param typeInfo The type of the elements in the state.
 * @param <T> The type of the values that are in the union state.
 * @return A {@code DataStream} representing the elements in state.
 * @throws IOException If the savepoint path is invalid or the uid does not exist.
 */
public <T> DataStream<T> readUnionState(String uid, String name, TypeInformation<T> typeInfo) throws IOException {
    OperatorState operatorState = metadata.getOperatorState(uid);
    ListStateDescriptor<T> descriptor = new ListStateDescriptor<>(name, typeInfo);
    UnionStateInputFormat<T> inputFormat = new UnionStateInputFormat<>(operatorState, MutableConfig.of(env.getConfiguration()), stateBackend, descriptor);
    return SourceBuilder.fromFormat(env, inputFormat, typeInfo);
}

Example 49 with OperatorState

use of org.apache.flink.runtime.checkpoint.OperatorState in project flink by apache.

the class OperatorSubtaskStateReducer method reduce.

@Override
public void reduce(Iterable<TaggedOperatorSubtaskState> values, Collector<OperatorState> out) {
    List<TaggedOperatorSubtaskState> subtasks = StreamSupport.stream(values.spliterator(), false).collect(Collectors.toList());
    OperatorState operatorState = new OperatorState(operatorID, subtasks.size(), maxParallelism);
    for (TaggedOperatorSubtaskState value : subtasks) {
        operatorState.putState(value.index, value.state);
    }
    out.collect(operatorState);
}

Example 50 with OperatorState

use of org.apache.flink.runtime.checkpoint.OperatorState in project flink by apache.

the class SavepointWriter method fromExistingSavepoint.

/**
 * Loads an existing savepoint. Useful if you want to modify or extend the state of an existing
 * application.
 *
 * @param path The path to an existing savepoint on disk.
 * @param stateBackend The state backend of the savepoint.
 * @return A {@link SavepointWriter}.
 * @see #fromExistingSavepoint(String)
 */
public static SavepointWriter fromExistingSavepoint(String path, StateBackend stateBackend) throws IOException {
    CheckpointMetadata metadata = SavepointLoader.loadSavepointMetadata(path);
    int maxParallelism = metadata.getOperatorStates().stream().map(OperatorState::getMaxParallelism).max(Comparator.naturalOrder()).orElseThrow(() -> new RuntimeException("Savepoint must contain at least one operator state."));
    SavepointMetadataV2 savepointMetadata = new SavepointMetadataV2(maxParallelism, metadata.getMasterStates(), metadata.getOperatorStates());
    return new SavepointWriter(savepointMetadata, stateBackend);
}