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/*
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2019, 2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.utils.time;
import java.util.concurrent.Callable;
import java.util.concurrent.Delayed;
import java.util.concurrent.FutureTask;
import java.util.concurrent.RunnableScheduledFuture;
import java.util.concurrent.TimeUnit;
import lombok.AccessLevel;
import lombok.Getter;
import lombok.Setter;
/**
* Scheduled future that gets its time from an associated work item.
*
* @param <T> type of result returned by the future
*/
class PseudoScheduledFuture<T> extends FutureTask<T> implements RunnableScheduledFuture<T> {
/**
* {@code True} if this task is periodic, {@code false} otherwise.
*/
@Getter
private final boolean periodic;
/**
* The work item with which this is associated.
*/
@Getter(AccessLevel.PROTECTED)
@Setter(AccessLevel.PROTECTED)
private WorkItem workItem;
/**
* Constructs the object.
*
* @param runnable action to be executed
* @param result value to be returned by the {@link #get()} operation
* @param periodic {@code true} if this task is periodic, {@code false} otherwise
*/
public PseudoScheduledFuture(Runnable runnable, T result, boolean periodic) {
super(runnable, result);
this.periodic = periodic;
}
/**
* Constructs the object.
*
* @param callable action to be executed
* @param periodic {@code true} if this task is periodic, {@code false} otherwise
*/
public PseudoScheduledFuture(Callable<T> callable, boolean periodic) {
super(callable);
this.periodic = periodic;
}
@Override
public long getDelay(TimeUnit unit) {
return unit.convert(workItem.getDelay(), TimeUnit.MILLISECONDS);
}
@Override
public int compareTo(Delayed other) {
return Long.compare(workItem.getDelay(), other.getDelay(TimeUnit.MILLISECONDS));
}
@Override
public void run() {
if (isPeriodic()) {
super.runAndReset();
} else {
super.run();
}
}
}
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