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/*
 * Copyright 2011-2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazonaws.util;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.logging.LogFactory;
import org.apache.http.annotation.NotThreadSafe;

/**
 * In contrast to {@link TimingInfo}, which is intended to be a minimal support
 * of the timing info, this class is the full support of timing info including
 * features related to sub-measurements and counters.
 * 

* This class is instantiated instead of {@link TimingInfo} when * request metric collection is required during a particular service * request/response cycle. */ @NotThreadSafe class TimingInfoFullSupport extends TimingInfo { private final Map> subMeasurementsByName = new HashMap>(); private final Map countersByName = new HashMap(); /** * A private ctor to facilitate the deprecation of using millisecond and * migration to using nanosecond for timing measurement. * * @param startEpochTimeMilli start time since epoch in millisecond * @param startTimeNano start time in nanosecond * @param endTimeNano end time in nanosecond; or null if not known * * @see TimingInfo#startTimingFullSupport() * @see TimingInfo#startTimingFullSupport(long) * @see TimingInfo#newTimingInfoFullSupport(long, long) * @see TimingInfo#newTimingInfoFullSupport(long, long, long) */ TimingInfoFullSupport(Long startEpochTimeMilli, long startTimeNano, Long endTimeNano) { super(startEpochTimeMilli, startTimeNano, endTimeNano); } @Override public void addSubMeasurement(String subMeasurementName, TimingInfo ti) { List timings = subMeasurementsByName.get(subMeasurementName); if (timings == null) { timings = new ArrayList(); subMeasurementsByName.put(subMeasurementName, timings); } if (ti.isEndTimeKnown()) { timings.add(ti); } else { LogFactory.getLog(getClass()).debug( "Skip submeasurement timing info with no end time for " + subMeasurementName); } } @Override public TimingInfo getSubMeasurement(String subMeasurementName) { return getSubMeasurement(subMeasurementName, 0); } @Override public TimingInfo getSubMeasurement(String subMesurementName, int index) { List timings = subMeasurementsByName.get(subMesurementName); if (index < 0 || timings == null || timings.size() == 0 || index >= timings.size()) { return null; } return timings.get(index); } @Override public TimingInfo getLastSubMeasurement(String subMeasurementName) { if (subMeasurementsByName == null || subMeasurementsByName.size() == 0) { return null; } List timings = subMeasurementsByName.get(subMeasurementName); if (timings == null || timings.size() == 0) { return null; } return timings.get(timings.size() - 1); } @Override public List getAllSubMeasurements(String subMeasurementName) { return subMeasurementsByName.get(subMeasurementName); } @Override public Map> getSubMeasurementsByName() { return subMeasurementsByName; } @Override public Number getCounter(String key) { return countersByName.get(key); } @Override public Map getAllCounters() { return countersByName; } @Override public void setCounter(String key, long count) { countersByName.put(key, count); } @Override public void incrementCounter(String key) { int count = 0; Number counter = getCounter(key); if (counter != null) { count = counter.intValue(); } setCounter(key, ++count); } }





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