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// Copyright (C) 2015 The Android Open Source Project
//
// 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.google.gerrit.metrics.dropwizard;
import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.gerrit.metrics.Description;
import com.google.gerrit.metrics.Field;
import com.google.gerrit.metrics.Histogram2;
import com.google.gerrit.metrics.Histogram3;
/** Generalized implementation of N-dimensional Histogram metrics. */
class HistogramImplN extends BucketedHistogram implements BucketedMetric {
HistogramImplN(DropWizardMetricMaker metrics, String name, Description desc, Field<?>... fields) {
super(metrics, name, desc, fields);
}
<F1, F2> Histogram2<F1, F2> histogram2() {
return new Histogram2<F1, F2>() {
@Override
public void record(F1 field1, F2 field2, long value) {
total.record(value);
forceCreate(field1, field2).record(value);
}
@Override
public void remove() {
doRemove();
}
};
}
<F1, F2, F3> Histogram3<F1, F2, F3> histogram3() {
return new Histogram3<F1, F2, F3>() {
@Override
public void record(F1 field1, F2 field2, F3 field3, long value) {
total.record(value);
forceCreate(field1, field2, field3).record(value);
}
@Override
public void remove() {
doRemove();
}
};
}
@SuppressWarnings("unchecked")
@Override
String name(Object key) {
ImmutableList<Object> keyList = (ImmutableList<Object>) key;
String[] parts = new String[fields.length];
for (int i = 0; i < fields.length; i++) {
Function<Object, String> fmt = (Function<Object, String>) fields[i].formatter();
parts[i] = fmt.apply(keyList.get(i)).replace('/', '-');
}
return Joiner.on('/').join(parts);
}
}
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