Java DataInputViewStream类代码示例

import org.apache.flink.api.java.typeutils.runtime.DataInputViewStream; //导入依赖的package包/类
@SuppressWarnings("unchecked")
@Override
public T deserialize(DataInputView source) throws IOException {
	checkKryoInitialized();
	if (source != previousIn) {
		DataInputViewStream inputStream = new DataInputViewStream(source);
		input = new NoFetchingInput(inputStream);
		previousIn = source;
	}

	try {
		return (T) kryo.readClassAndObject(input);
	} catch (KryoException ke) {
		Throwable cause = ke.getCause();

		if (cause instanceof EOFException) {
			throw (EOFException) cause;
		} else {
			throw ke;
		}
	}
}
 

import org.apache.flink.api.java.typeutils.runtime.DataInputViewStream; //导入依赖的package包/类
@Override
public void restoreState(StreamTaskState taskState, long recoveryTimestamp) throws Exception {
	@SuppressWarnings("unchecked")
	StateHandle<DataInputView> stateHandle = (StateHandle<DataInputView>)taskState.getOperatorState();

	DataInputView input = stateHandle.getState(getUserCodeClassloader());

	ObjectInputStream ois = new ObjectInputStream(new DataInputViewStream(input));

	int numAlertEvents = ois.readInt();

	for (int i = 0; i < numAlertEvents; i++) {
		AlertEvent alertEvent = (AlertEvent)ois.readObject();
		alertEvents.add(alertEvent);
	}

	super.restoreState(taskState, recoveryTimestamp);
}
 

import org.apache.flink.api.java.typeutils.runtime.DataInputViewStream; //导入依赖的package包/类
@Override
public void read(DataInputView in) throws IOException {
	super.read(in);

	try (final DataInputViewStream inViewWrapper = new DataInputViewStream(in)) {
		componentClass = InstantiationUtil.deserializeObject(inViewWrapper, getUserCodeClassLoader());
	} catch (ClassNotFoundException e) {
		throw new IOException("Could not find requested element class in classpath.", e);
	}
}
 

import org.apache.flink.api.java.typeutils.runtime.DataInputViewStream; //导入依赖的package包/类
@SuppressWarnings("unchecked")
@Override
public RegisteredOperatorBackendStateMetaInfo.Snapshot<S> readStateMetaInfo(DataInputView in) throws IOException {
	RegisteredOperatorBackendStateMetaInfo.Snapshot<S> stateMetaInfo =
		new RegisteredOperatorBackendStateMetaInfo.Snapshot<>();

	stateMetaInfo.setName(in.readUTF());
	stateMetaInfo.setAssignmentMode(OperatorStateHandle.Mode.values()[in.readByte()]);

	DataInputViewStream dis = new DataInputViewStream(in);
	ClassLoader previousClassLoader = Thread.currentThread().getContextClassLoader();
	try (
		TypeSerializerSerializationUtil.FailureTolerantObjectInputStream ois =
			new TypeSerializerSerializationUtil.FailureTolerantObjectInputStream(dis, userCodeClassLoader)) {

		Thread.currentThread().setContextClassLoader(userCodeClassLoader);
		TypeSerializer<S> stateSerializer = (TypeSerializer<S>) ois.readObject();
		stateMetaInfo.setPartitionStateSerializer(stateSerializer);
	} catch (ClassNotFoundException exception) {
		throw new IOException(exception);
	} finally {
		Thread.currentThread().setContextClassLoader(previousClassLoader);
	}

	// old versions do not contain the partition state serializer's configuration snapshot
	stateMetaInfo.setPartitionStateSerializerConfigSnapshot(null);

	return stateMetaInfo;
}
 

import org.apache.flink.api.java.typeutils.runtime.DataInputViewStream; //导入依赖的package包/类
@Override
public T deserialize(DataInputView source) throws IOException {
	try (final DataInputViewStream inViewWrapper = new DataInputViewStream(source)) {
		return InstantiationUtil.deserializeObject(
				inViewWrapper,
				Thread.currentThread().getContextClassLoader());
	} catch (ClassNotFoundException e) {
		throw new IOException("Could not deserialize object.", e);
	}
}