/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.hadoop.hbase.replication.regionserver;

import org.apache.hadoop.metrics2.lib.MutableFastCounter;
import org.apache.hadoop.metrics2.lib.MutableGaugeInt;
import org.apache.hadoop.metrics2.lib.MutableGaugeLong;
import org.apache.hadoop.metrics2.lib.MutableHistogram;
import org.apache.yetus.audience.InterfaceAudience;

@InterfaceAudience.Private
public class MetricsReplicationSourceSourceImpl implements MetricsReplicationSourceSource {

  private final MetricsReplicationSourceImpl rms;
  private final String id;
  private final String sizeOfLogQueueKey;
  private final String ageOfLastShippedOpKey;
  private final String logReadInEditsKey;
  private final String logEditsFilteredKey;
  private final String shippedBatchesKey;
  private final String shippedOpsKey;
  private final String failedBatchesKey;
  private String keyPrefix;

  private final String shippedBytesKey;
  private final String logReadInBytesKey;
  private final String shippedHFilesKey;
  private final String sizeOfHFileRefsQueueKey;
  private final String oldestWalAgeKey;
  private final String sourceInitializingKey;

  private final MutableHistogram ageOfLastShippedOpHist;
  private final MutableGaugeLong sizeOfLogQueueGauge;
  private final MutableFastCounter logReadInEditsCounter;
  private final MutableFastCounter walEditsFilteredCounter;
  private final MutableFastCounter shippedBatchesCounter;
  private final MutableFastCounter failedBatchesCounter;
  private final MutableFastCounter shippedOpsCounter;
  private final MutableFastCounter shippedBytesCounter;
  private final MutableFastCounter logReadInBytesCounter;
  private final MutableFastCounter shippedHFilesCounter;
  private final MutableGaugeLong sizeOfHFileRefsQueueGauge;

  private final String unknownFileLengthKey;
  private final String uncleanlyClosedKey;
  private final String uncleanlySkippedBytesKey;
  private final String restartedKey;
  private final String repeatedBytesKey;
  private final String completedLogsKey;
  private final String completedRecoveryKey;
  private final MutableFastCounter unknownFileLengthForClosedWAL;
  private final MutableFastCounter uncleanlyClosedWAL;
  private final MutableFastCounter uncleanlyClosedSkippedBytes;
  private final MutableFastCounter restartWALReading;
  private final MutableFastCounter repeatedFileBytes;
  private final MutableFastCounter completedWAL;
  private final MutableFastCounter completedRecoveryQueue;
  private final MutableGaugeLong oldestWalAge;
  private final MutableGaugeInt sourceInitializing;

  public MetricsReplicationSourceSourceImpl(MetricsReplicationSourceImpl rms, String id) {
    this.rms = rms;
    this.id = id;
    this.keyPrefix = "source." + this.id + ".";

    ageOfLastShippedOpKey = this.keyPrefix + "ageOfLastShippedOp";
    ageOfLastShippedOpHist = rms.getMetricsRegistry().newTimeHistogram(ageOfLastShippedOpKey);

    sizeOfLogQueueKey = this.keyPrefix + "sizeOfLogQueue";
    sizeOfLogQueueGauge = rms.getMetricsRegistry().getGauge(sizeOfLogQueueKey, 0L);

    shippedBatchesKey = this.keyPrefix + "shippedBatches";
    shippedBatchesCounter = rms.getMetricsRegistry().getCounter(shippedBatchesKey, 0L);

    failedBatchesKey = this.keyPrefix + "failedBatches";
    failedBatchesCounter = rms.getMetricsRegistry().getCounter(failedBatchesKey, 0L);

    shippedOpsKey = this.keyPrefix + "shippedOps";
    shippedOpsCounter = rms.getMetricsRegistry().getCounter(shippedOpsKey, 0L);

    shippedBytesKey = this.keyPrefix + "shippedBytes";
    shippedBytesCounter = rms.getMetricsRegistry().getCounter(shippedBytesKey, 0L);

    logReadInBytesKey = this.keyPrefix + "logReadInBytes";
    logReadInBytesCounter = rms.getMetricsRegistry().getCounter(logReadInBytesKey, 0L);

    logReadInEditsKey = this.keyPrefix + "logEditsRead";
    logReadInEditsCounter = rms.getMetricsRegistry().getCounter(logReadInEditsKey, 0L);

    logEditsFilteredKey = this.keyPrefix + "logEditsFiltered";
    walEditsFilteredCounter = rms.getMetricsRegistry().getCounter(logEditsFilteredKey, 0L);

    shippedHFilesKey = this.keyPrefix + "shippedHFiles";
    shippedHFilesCounter = rms.getMetricsRegistry().getCounter(shippedHFilesKey, 0L);

    sizeOfHFileRefsQueueKey = this.keyPrefix + "sizeOfHFileRefsQueue";
    sizeOfHFileRefsQueueGauge = rms.getMetricsRegistry().getGauge(sizeOfHFileRefsQueueKey, 0L);

    unknownFileLengthKey = this.keyPrefix + "closedLogsWithUnknownFileLength";
    unknownFileLengthForClosedWAL = rms.getMetricsRegistry().getCounter(unknownFileLengthKey, 0L);

    uncleanlyClosedKey = this.keyPrefix + "uncleanlyClosedLogs";
    uncleanlyClosedWAL = rms.getMetricsRegistry().getCounter(uncleanlyClosedKey, 0L);

    uncleanlySkippedBytesKey = this.keyPrefix + "ignoredUncleanlyClosedLogContentsInBytes";
    uncleanlyClosedSkippedBytes = rms.getMetricsRegistry().getCounter(uncleanlySkippedBytesKey, 0L);

    restartedKey = this.keyPrefix + "restartedLogReading";
    restartWALReading = rms.getMetricsRegistry().getCounter(restartedKey, 0L);

    repeatedBytesKey = this.keyPrefix + "repeatedLogFileBytes";
    repeatedFileBytes = rms.getMetricsRegistry().getCounter(repeatedBytesKey, 0L);

    completedLogsKey = this.keyPrefix + "completedLogs";
    completedWAL = rms.getMetricsRegistry().getCounter(completedLogsKey, 0L);

    completedRecoveryKey = this.keyPrefix + "completedRecoverQueues";
    completedRecoveryQueue = rms.getMetricsRegistry().getCounter(completedRecoveryKey, 0L);

    oldestWalAgeKey = this.keyPrefix + "oldestWalAge";
    oldestWalAge = rms.getMetricsRegistry().getGauge(oldestWalAgeKey, 0L);

    sourceInitializingKey = this.keyPrefix + "isInitializing";
    sourceInitializing = rms.getMetricsRegistry().getGaugeInt(sourceInitializingKey, 0);
  }

  @Override
  public void setLastShippedAge(long age) {
    ageOfLastShippedOpHist.add(age);
  }

  @Override
  public void incrSizeOfLogQueue(int size) {
    sizeOfLogQueueGauge.incr(size);
  }

  @Override
  public void decrSizeOfLogQueue(int size) {
    sizeOfLogQueueGauge.decr(size);
  }

  @Override
  public void incrLogReadInEdits(long size) {
    logReadInEditsCounter.incr(size);
  }

  @Override
  public void incrLogEditsFiltered(long size) {
    walEditsFilteredCounter.incr(size);
  }

  @Override
  public void incrBatchesShipped(int batches) {
    shippedBatchesCounter.incr(batches);
  }

  @Override
  public void incrFailedBatches() {
    failedBatchesCounter.incr();
  }

  @Override
  public void incrOpsShipped(long ops) {
    shippedOpsCounter.incr(ops);
  }

  @Override
  public void incrShippedBytes(long size) {
    shippedBytesCounter.incr(size);
  }

  @Override
  public void incrLogReadInBytes(long size) {
    logReadInBytesCounter.incr(size);
  }

  @Override
  public void clear() {
    rms.removeMetric(ageOfLastShippedOpKey);

    rms.removeMetric(sizeOfLogQueueKey);

    rms.removeMetric(shippedBatchesKey);
    rms.removeMetric(failedBatchesKey);
    rms.removeMetric(shippedOpsKey);
    rms.removeMetric(shippedBytesKey);

    rms.removeMetric(logReadInBytesKey);
    rms.removeMetric(logReadInEditsKey);

    rms.removeMetric(logEditsFilteredKey);

    rms.removeMetric(shippedHFilesKey);
    rms.removeMetric(sizeOfHFileRefsQueueKey);

    rms.removeMetric(unknownFileLengthKey);
    rms.removeMetric(uncleanlyClosedKey);
    rms.removeMetric(uncleanlySkippedBytesKey);
    rms.removeMetric(restartedKey);
    rms.removeMetric(repeatedBytesKey);
    rms.removeMetric(completedLogsKey);
    rms.removeMetric(completedRecoveryKey);
    rms.removeMetric(oldestWalAgeKey);
    rms.removeMetric(sourceInitializingKey);
  }

  @Override
  public long getLastShippedAge() {
    return ageOfLastShippedOpHist.getMax();
  }

  @Override
  public void incrHFilesShipped(long hfiles) {
    shippedHFilesCounter.incr(hfiles);
  }

  @Override
  public void incrSizeOfHFileRefsQueue(long size) {
    sizeOfHFileRefsQueueGauge.incr(size);
  }

  @Override
  public void decrSizeOfHFileRefsQueue(long size) {
    sizeOfHFileRefsQueueGauge.decr(size);
  }

  @Override
  public int getSizeOfLogQueue() {
    return (int) sizeOfLogQueueGauge.value();
  }

  @Override
  public void incrUnknownFileLengthForClosedWAL() {
    unknownFileLengthForClosedWAL.incr(1L);
  }

  @Override
  public void incrUncleanlyClosedWALs() {
    uncleanlyClosedWAL.incr(1L);
  }

  @Override
  public long getUncleanlyClosedWALs() {
    return uncleanlyClosedWAL.value();
  }

  @Override
  public void incrBytesSkippedInUncleanlyClosedWALs(final long bytes) {
    uncleanlyClosedSkippedBytes.incr(bytes);
  }

  @Override
  public void incrRestartedWALReading() {
    restartWALReading.incr(1L);
  }

  @Override
  public void incrRepeatedFileBytes(final long bytes) {
    repeatedFileBytes.incr(bytes);
  }

  @Override
  public void incrCompletedWAL() {
    completedWAL.incr(1L);
  }

  @Override
  public void incrCompletedRecoveryQueue() {
    completedRecoveryQueue.incr(1L);
  }

  @Override
  public void incrFailedRecoveryQueue() {
    /* no op */}

  @Override
  public void setOldestWalAge(long age) {
    oldestWalAge.set(age);
  }

  @Override
  public long getOldestWalAge() {
    return oldestWalAge.value();
  }

  @Override
  public void incrSourceInitializing() {
    sourceInitializing.incr(1);
  }

  @Override
  public int getSourceInitializing() {
    return sourceInitializing.value();
  }

  @Override
  public void decrSourceInitializing() {
    sourceInitializing.decr(1);
  }

  @Override
  public void init() {
    rms.init();
  }

  @Override
  public void setGauge(String gaugeName, long value) {
    rms.setGauge(this.keyPrefix + gaugeName, value);
  }

  @Override
  public void incGauge(String gaugeName, long delta) {
    rms.incGauge(this.keyPrefix + gaugeName, delta);
  }

  @Override
  public void decGauge(String gaugeName, long delta) {
    rms.decGauge(this.keyPrefix + gaugeName, delta);
  }

  @Override
  public void removeMetric(String key) {
    rms.removeMetric(this.keyPrefix + key);
  }

  @Override
  public void incCounters(String counterName, long delta) {
    rms.incCounters(this.keyPrefix + counterName, delta);
  }

  @Override
  public void updateHistogram(String name, long value) {
    rms.updateHistogram(this.keyPrefix + name, value);
  }

  @Override
  public String getMetricsContext() {
    return rms.getMetricsContext();
  }

  @Override
  public String getMetricsDescription() {
    return rms.getMetricsDescription();
  }

  @Override
  public String getMetricsJmxContext() {
    return rms.getMetricsJmxContext();
  }

  @Override
  public String getMetricsName() {
    return rms.getMetricsName();
  }

  @Override
  public long getWALEditsRead() {
    return this.logReadInEditsCounter.value();
  }

  @Override
  public long getShippedOps() {
    return this.shippedOpsCounter.value();
  }

  @Override
  public long getEditsFiltered() {
    return this.walEditsFilteredCounter.value();
  }
}