DirectRecorderSource.java

/*
 * Copyright (c) 2001-2017, Zoltan Farkas All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Additionally licensed with:
 *
 * 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 org.spf4j.perf.impl;

import org.spf4j.perf.impl.acc.DirectStoreAccumulator;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.spf4j.base.Pair;
import org.spf4j.concurrent.UnboundedLoadingCache;
import org.spf4j.perf.MeasurementRecorder;
import org.spf4j.perf.MeasurementRecorderSource;
import org.spf4j.perf.MeasurementStore;
import org.spf4j.tsdb2.avro.MeasurementType;

 /*
 * Copyright (c) 2001, Zoltan Farkas All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

public final class DirectRecorderSource implements MeasurementRecorderSource {


    private final LoadingCache<Object, MeasurementRecorder> recorders;

    public DirectRecorderSource(final Object forWhat, final String description,
            final String uom, final int sampleTimeMillis, final MeasurementStore store) {
      this(forWhat, description, uom, sampleTimeMillis, store, MeasurementType.UNTYPED);
    }

    public DirectRecorderSource(final Object forWhat, final String description,
            final String uom, final int sampleTimeMillis, final MeasurementStore store,
            final MeasurementType measurementType) {
        recorders = new UnboundedLoadingCache(16,
                new CreateDirectRecorder(forWhat, description, uom, sampleTimeMillis, store, measurementType));
    }

    @Override
    public MeasurementRecorder getRecorder(final Object forWhat) {
        return recorders.getUnchecked(forWhat);
    }


    private static final class CreateDirectRecorder extends CacheLoader<Object, MeasurementRecorder> {

        private final Object forWhat;
        private final String description;
        private final String uom;
        private final int sampleTimeMillis;
        private final MeasurementStore store;
        private final MeasurementType measurementType;

        CreateDirectRecorder(final Object forWhat, final String description,
                final String uom, final int sampleTimeMillis, final MeasurementStore store,
                final MeasurementType measurementType) {
            this.forWhat = forWhat;
            this.description = description;
            this.uom = uom;
            this.sampleTimeMillis = sampleTimeMillis;
            this.store = store;
            this.measurementType = measurementType;
        }

        @Override
        public MeasurementRecorder load(final Object key) {
            return new DirectStoreAccumulator(Pair.of(forWhat, key), description,
                    uom, sampleTimeMillis, store, measurementType);
        }
    }

    @Override
    public String toString() {
        return "DirectRecorderSource{" + "recorders=" + recorders + '}';
    }

}