com.datatorrent.api.annotation.OperatorAnnotation Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package com.datatorrent.api.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Annotation to specify characteristics of an operator.
*
* @since 0.3.5
*/
@Documented
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface OperatorAnnotation
{
/**
* Element specifying whether operator can be partitioned or not.
* Default value is true indicating operator can be partitioned.
* @return Whether operator can be partitioned or not
*/
boolean partitionable() default true;
/**
* Element specifying whether an operator can be check-pointed in the middle of an application window.
* Default value is true indicating that it can be. When false the checkpoint window count should be a multiple of
* application window count otherwise the dag validation will fail.
*
* @return whether operator can be checkpointed in middle of an application window.
*/
boolean checkpointableWithinAppWindow() default true;
}