DirectStoreAccumulator.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.acc;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import java.beans.ConstructorProperties;
import java.io.IOException;
import java.io.UncheckedIOException;
import org.spf4j.jmx.JmxExport;
import org.spf4j.jmx.Registry;
import org.spf4j.perf.CloseableMeasurementRecorder;
import org.spf4j.perf.JmxSupport;
import org.spf4j.perf.MeasurementsInfo;
import org.spf4j.perf.MeasurementStore;
import org.spf4j.perf.impl.MeasurementsInfoImpl;
import org.spf4j.tsdb2.avro.Aggregation;
import org.spf4j.tsdb2.avro.MeasurementType;

/**
 * @author zoly
 */
public final class DirectStoreAccumulator implements CloseableMeasurementRecorder, JmxSupport {

  private static final String[] MEASUREMENTS = {"value"};

  private final MeasurementsInfo info;
  private final MeasurementStore measurementStore;
  private final long tableId;

  private long lastRecordedTS;

  private long lastRecordedValue;

  public DirectStoreAccumulator(final Object measuredEntity, final String description, final String unitOfMeasurement,
          final int sampleTimeMillis, final MeasurementStore measurementStore) {
    this(measuredEntity, description, unitOfMeasurement, sampleTimeMillis, measurementStore, MeasurementType.GAUGE);
  }

  public DirectStoreAccumulator(final Object measuredEntity, final String description, final String unitOfMeasurement,
          final int sampleTimeMillis, final MeasurementStore measurementStore, final MeasurementType mType) {
    this(measuredEntity, description, unitOfMeasurement, sampleTimeMillis,
            measurementStore, mType, Aggregation.UNKNOWN);
  }

  public DirectStoreAccumulator(final Object measuredEntity, final String description, final String unitOfMeasurement,
          final int sampleTimeMillis, final MeasurementStore measurementStore, final MeasurementType mType,
          final Aggregation agg) {
    this.info = new MeasurementsInfoImpl(measuredEntity, description,
            MEASUREMENTS, new String[]{unitOfMeasurement}, new Aggregation[] {agg}, mType);
    this.measurementStore = measurementStore;
    try {
      tableId = measurementStore.alocateMeasurements(info, sampleTimeMillis);
    } catch (IOException ex) {
      throw new UncheckedIOException(ex);
    }
  }

  @JmxExport
  public String getUnitOfMeasurement() {
    return info.getMeasurementUnit(0);
  }

  @Override
  public void record(final long measurement) {
    recordAt(System.currentTimeMillis(), measurement);
  }

  @Override
  @SuppressFBWarnings("EXS_EXCEPTION_SOFTENING_NO_CHECKED")
  public synchronized void recordAt(final long timestampMillis, final long measurement) {
    lastRecordedValue = measurement;
    lastRecordedTS = timestampMillis;
    try {
      measurementStore.saveMeasurements(tableId, timestampMillis, measurement);
    } catch (IOException ex) {
      throw new UncheckedIOException(ex);
    }
  }

  public void registerJmx() {
    Registry.export("org.spf4j.perf.recorders", info.getMeasuredEntity().toString(), this);
  }

  @Override
  public void close() {
    Registry.unregister("org.spf4j.perf.recorders", info.getMeasuredEntity().toString());
  }

  public static final class RecordedValue {

    private final long ts;
    private final long value;

    @ConstructorProperties({"ts", "value"})
    public RecordedValue(final long ts, final long value) {
      this.ts = ts;
      this.value = value;
    }

    public long getTs() {
      return ts;
    }

    public long getValue() {
      return value;
    }
  }

  @JmxExport(description = "Last recorded value")
  public synchronized RecordedValue getLastRecorded() {
    return new RecordedValue(lastRecordedTS, lastRecordedValue);
  }

  @JmxExport
  @SuppressFBWarnings("SPP_NON_USEFUL_TOSTRING")
  public String getInfo() {
    return info.toString();
  }

  @Override
  public String toString() {
    return "DirectStoreAccumulator{" + "info=" + info + ", measurementStore=" + measurementStore
            + ", tableId=" + tableId + ", lastRecordedTS=" + lastRecordedTS + ", lastRecordedValue="
            + lastRecordedValue + '}';
  }

}