本文整理汇总了Java中org.apache.flink.api.common.state.ValueState.value方法的典型用法代码示例。如果您正苦于以下问题：Java ValueState.value方法的具体用法？Java ValueState.value怎么用？Java ValueState.value使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.flink.api.common.state.ValueState的用法示例。
在下文中一共展示了ValueState.value方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: testCopyDefaultValue
import org.apache.flink.api.common.state.ValueState; //导入方法依赖的package包/类
@Test
public void testCopyDefaultValue() throws Exception {
final AbstractKeyedStateBackend<Integer> backend = createKeyedBackend(IntSerializer.INSTANCE);
ValueStateDescriptor<IntValue> kvId = new ValueStateDescriptor<>("id", IntValue.class, new IntValue(-1));
ValueState<IntValue> state = backend.getPartitionedState(VoidNamespace.INSTANCE, VoidNamespaceSerializer.INSTANCE, kvId);
backend.setCurrentKey(1);
IntValue default1 = state.value();
backend.setCurrentKey(2);
IntValue default2 = state.value();
assertNotNull(default1);
assertNotNull(default2);
assertEquals(default1, default2);
assertFalse(default1 == default2);
backend.dispose();
}
示例2: onElement
import org.apache.flink.api.common.state.ValueState; //导入方法依赖的package包/类
@Override
public TriggerResult onElement(T element, long timestamp, W window, TriggerContext ctx) throws Exception {
ValueState<T> lastElementState = ctx.getPartitionedState(stateDesc);
if (lastElementState.value() == null) {
lastElementState.update(element);
return TriggerResult.CONTINUE;
}
if (deltaFunction.getDelta(lastElementState.value(), element) > this.threshold) {
lastElementState.update(element);
return TriggerResult.FIRE;
}
return TriggerResult.CONTINUE;
}
示例3: testValueStateRestoreWithWrongSerializers
import org.apache.flink.api.common.state.ValueState; //导入方法依赖的package包/类
@Test
@SuppressWarnings("unchecked")
public void testValueStateRestoreWithWrongSerializers() throws Exception {
CheckpointStreamFactory streamFactory = createStreamFactory();
AbstractKeyedStateBackend<Integer> backend = createKeyedBackend(IntSerializer.INSTANCE);
try {
ValueStateDescriptor<String> kvId = new ValueStateDescriptor<>("id", String.class);
ValueState<String> state = backend.getPartitionedState(VoidNamespace.INSTANCE, VoidNamespaceSerializer.INSTANCE, kvId);
backend.setCurrentKey(1);
state.update("1");
backend.setCurrentKey(2);
state.update("2");
// draw a snapshot
KeyedStateHandle snapshot1 = FutureUtil.runIfNotDoneAndGet(backend.snapshot(682375462378L, 2, streamFactory, CheckpointOptions.forCheckpoint()));
backend.dispose();
// restore the first snapshot and validate it
backend = restoreKeyedBackend(IntSerializer.INSTANCE, snapshot1);
snapshot1.discardState();
@SuppressWarnings("unchecked")
TypeSerializer<String> fakeStringSerializer =
(TypeSerializer<String>) (TypeSerializer<?>) FloatSerializer.INSTANCE;
try {
kvId = new ValueStateDescriptor<>("id", fakeStringSerializer);
state = backend.getPartitionedState(VoidNamespace.INSTANCE, VoidNamespaceSerializer.INSTANCE, kvId);
state.value();
fail("should recognize wrong serializers");
} catch (StateMigrationException ignored) {
// expected
}
} finally {
backend.dispose();
}
}