/*
* Copyright (C) 2012 Facebook, Inc.
*
* 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.
*/
package com.facebook.stats;
import org.joda.time.ReadableDateTime;
import org.joda.time.ReadableDuration;
import java.util.Arrays;
import java.util.Iterator;
public class CompositeMax extends AbstractCompositeCounter<EventCounter>
implements EventCounter {
public CompositeMax(
ReadableDuration maxLength, ReadableDuration maxChunkLength
) {
super(maxLength, maxChunkLength);
}
public CompositeMax(ReadableDuration maxLength) {
super(maxLength);
}
@Override
public EventCounter merge(EventCounter counter) {
if (counter instanceof CompositeMax) {
return internalMerge(
((CompositeMax) counter).getEventCounters(),
new CompositeMax(getMaxLength(), getMaxChunkLength())
);
} else {
return internalMerge(
Arrays.asList(counter),
new CompositeMax(getMaxLength(), getMaxChunkLength())
);
}
}
@Override
protected EventCounter nextCounter(
ReadableDateTime start, ReadableDateTime end
) {
return new MaxEventCounter(start, end);
}
@Override
public synchronized long getValue() {
trimIfNeeded();
long max = Long.MIN_VALUE;
for (EventCounter eventCounter : getEventCounters()) {
max = Math.max(max, eventCounter.getValue());
}
return max;
}
}