Examples with BackwardsCompatibleSerializerSnapshot org.apache.flink.api.common.typeutils.BackwardsCompatibleSerializerSnapshot used on opensource projects

Example 1 with BackwardsCompatibleSerializerSnapshot

use of org.apache.flink.api.common.typeutils.BackwardsCompatibleSerializerSnapshot in project flink by apache.

the class KeyedBackendSerializationProxy method read.

@SuppressWarnings("unchecked")
@Override
public void read(DataInputView in) throws IOException {
    super.read(in);
    final int readVersion = getReadVersion();
    if (readVersion >= 4) {
        usingKeyGroupCompression = in.readBoolean();
    } else {
        usingKeyGroupCompression = false;
    }
    // only starting from version 3, we have the key serializer and its config snapshot written
    if (readVersion >= 6) {
        this.keySerializerSnapshot = TypeSerializerSnapshotSerializationUtil.readSerializerSnapshot(in, userCodeClassLoader, null);
    } else if (readVersion >= 3) {
        Tuple2<TypeSerializer<?>, TypeSerializerSnapshot<?>> keySerializerAndConfig = TypeSerializerSerializationUtil.readSerializersAndConfigsWithResilience(in, userCodeClassLoader).get(0);
        this.keySerializerSnapshot = (TypeSerializerSnapshot<K>) keySerializerAndConfig.f1;
    } else {
        this.keySerializerSnapshot = new BackwardsCompatibleSerializerSnapshot<>(TypeSerializerSerializationUtil.tryReadSerializer(in, userCodeClassLoader, true));
    }
    this.keySerializer = null;
    Integer metaInfoSnapshotVersion = META_INFO_SNAPSHOT_FORMAT_VERSION_MAPPER.get(readVersion);
    if (metaInfoSnapshotVersion == null) {
        // this should not happen; guard for the future
        throw new IOException("Cannot determine corresponding meta info snapshot version for keyed backend serialization readVersion=" + readVersion);
    }
    final StateMetaInfoReader stateMetaInfoReader = StateMetaInfoSnapshotReadersWriters.getReader(metaInfoSnapshotVersion, StateMetaInfoSnapshotReadersWriters.StateTypeHint.KEYED_STATE);
    int numKvStates = in.readShort();
    stateMetaInfoSnapshots = new ArrayList<>(numKvStates);
    for (int i = 0; i < numKvStates; i++) {
        StateMetaInfoSnapshot snapshot = stateMetaInfoReader.readStateMetaInfoSnapshot(in, userCodeClassLoader);
        stateMetaInfoSnapshots.add(snapshot);
    }
}