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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. 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. 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. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.internal;

//import com.gemstone.gemfire.distributed.DistributedSystem;
import com.gemstone.gemfire.*;
import com.gemstone.gemfire.internal.concurrent.CFactory;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;

// @todo darrel Add statistics instances to archive when they are created. 
/**
 * An object that maintains the values of various application-defined
 * statistics.  The statistics themselves are described by an instance
 * of {@link StatisticsType}.
 *
 * 

* * For optimal statistic access, each statistic may be referred to by * its {@link #nameToId id} in the statistics object. * *

* * @see Package introduction * * @author David Whitlock * @author Darrel Schneider * * @since 3.0 */ public abstract class StatisticsImpl implements Statistics { /** The type of this statistics instance */ private final StatisticsTypeImpl type; /** The display name of this statistics instance */ private final String textId; /** Numeric information display with these statistics */ private final long numericId; /** Non-zero if stats values come from operating system system calls */ private final int osStatFlags; /** Are these statistics closed? */ private boolean closed; /** Uniquely identifies this instance */ private long uniqueId; /////////////////////// Constructors /////////////////////// /** factory method to create a class that implements Statistics */ public static Statistics createAtomicNoOS(StatisticsType type, String textId, long numericId, long uniqueId, StatisticsManager mgr) { return CFactory.createAtomicStatistics(type, textId, numericId, uniqueId, mgr); } /** * Creates a new statistics instance of the given type and unique id * * @param type * A description of the statistics * @param textId * Text that helps identifies this instance * @param numericId * A number that helps identify this instance * @param uniqueId * A number that uniquely identifies this instance * @param osStatFlags * Non-zero if stats require system calls to collect them; for internal use only */ public StatisticsImpl(StatisticsType type, String textId, long numericId, long uniqueId, int osStatFlags) { this.type = (StatisticsTypeImpl)type; this.textId = textId; this.numericId = numericId; this.uniqueId = uniqueId; this.osStatFlags = osStatFlags; closed = false; } ////////////////////// Instance Methods ////////////////////// public final boolean usesSystemCalls() { return this.osStatFlags != 0; } public final int getOsStatFlags() { return this.osStatFlags; } public final int nameToId(String name) { return this.type.nameToId(name); } public final StatisticDescriptor nameToDescriptor(String name) { return this.type.nameToDescriptor(name); } public void close() { this.closed = true; } public final boolean isClosed() { return this.closed; } public abstract boolean isAtomic(); private final boolean isOpen() { // fix for bug 29973 return !this.closed; } //////////////////////// attribute Methods /////////////////////// public final StatisticsType getType() { return this.type; } public final String getTextId() { return this.textId; } public final long getNumericId() { return this.numericId; } /** * Gets the unique id for this resource */ public long getUniqueId() { return this.uniqueId; } /** * Sets a unique id for this resource. */ public void setUniqueId(long uid) { this.uniqueId = uid; } //////////////////////// set() Methods /////////////////////// public final void setInt(String name, int value) { setInt(nameToDescriptor(name), value); } public final void setInt(StatisticDescriptor descriptor, int value) { setInt(getIntId(descriptor), value); } public final void setInt(int id, int value) { if (isOpen()) { _setInt(id, value); } } /** * Sets the value of a statistic of type int at the * given offset, but performs no type checking. */ protected abstract void _setInt(int offset, int value); public final void setLong(String name, long value) { setLong(nameToDescriptor(name), value); } public final void setLong(StatisticDescriptor descriptor, long value) { setLong(getLongId(descriptor), value); } public final void setLong(int id, long value) { if (isOpen()) { _setLong(id, value); } } /** * Sets the value of a statistic of type long at the * given offset, but performs no type checking. */ protected abstract void _setLong(int offset, long value); public final void setDouble(String name, double value) { setDouble(nameToDescriptor(name), value); } public final void setDouble(StatisticDescriptor descriptor, double value) { setDouble(getDoubleId(descriptor), value); } public final void setDouble(int id, double value) { if (isOpen()) { _setDouble(id, value); } } /** * Sets the value of a statistic of type double at the * given offset, but performs no type checking. */ protected abstract void _setDouble(int offset, double value); /////////////////////// get() Methods /////////////////////// public final int getInt(String name) { return getInt(nameToDescriptor(name)); } public final int getInt(StatisticDescriptor descriptor) { return getInt(getIntId(descriptor)); } public final int getInt(int id) { if (isOpen()) { return _getInt(id); } else { return 0; } } /** * Returns the value of the statistic of type int at * the given offset, but performs no type checking. */ protected abstract int _getInt(int offset); public final long getLong(String name) { return getLong(nameToDescriptor(name)); } public final long getLong(StatisticDescriptor descriptor) { return getLong(getLongId(descriptor)); } public final long getLong(int id) { if (isOpen()) { return _getLong(id); } else { return 0; } } /** * Returns the value of the statistic of type long at * the given offset, but performs no type checking. */ protected abstract long _getLong(int offset); public final double getDouble(String name) { return getDouble(nameToDescriptor(name)); } public final double getDouble(StatisticDescriptor descriptor) { return getDouble(getDoubleId(descriptor)); } public final double getDouble(int id) { if (isOpen()) { return _getDouble(id); } else { return 0.0; } } /** * Returns the value of the statistic of type double at * the given offset, but performs no type checking. */ protected abstract double _getDouble(int offset); public final Number get(StatisticDescriptor descriptor) { if (isOpen()) { return _get((StatisticDescriptorImpl)descriptor); } else { return Integer.valueOf(0); } } public final Number get(String name) { return get(nameToDescriptor(name)); } public long getRawBits(StatisticDescriptor descriptor) { if (isOpen()) { return _getRawBits((StatisticDescriptorImpl)descriptor); } else { return 0; } } public long getRawBits(String name) { return getRawBits(nameToDescriptor(name)); } //////////////////////// inc() Methods //////////////////////// public final void incInt(String name, int delta) { incInt(nameToDescriptor(name), delta); } public final void incInt(StatisticDescriptor descriptor, int delta) { incInt(getIntId(descriptor), delta); } public final void incInt(int id, int delta) { if (isOpen()) { _incInt(id, delta); } } /** * Increments the value of the statistic of type int at * the given offset by a given amount, but performs no type checking. */ protected abstract void _incInt(int offset, int delta); public final void incLong(String name, long delta) { incLong(nameToDescriptor(name), delta); } public final void incLong(StatisticDescriptor descriptor, long delta) { incLong(getLongId(descriptor), delta); } public final void incLong(int id, long delta) { if (isOpen()) { _incLong(id, delta); } } /** * Increments the value of the statistic of type long at * the given offset by a given amount, but performs no type checking. */ protected abstract void _incLong(int offset, long delta); public final void incDouble(String name, double delta) { incDouble(nameToDescriptor(name), delta); } public final void incDouble(StatisticDescriptor descriptor, double delta) { incDouble(getDoubleId(descriptor), delta); } public final void incDouble(int id, double delta) { if (isOpen()) { _incDouble(id, delta); } } /** * For internal use only. * Tells the implementation to prepare the data in this instance * for sampling. * @since 5.1 */ public void prepareForSample() { // nothing needed in this impl. } /** * Increments the value of the statistic of type double at * the given offset by a given amount, but performs no type checking. */ protected abstract void _incDouble(int offset, double delta); @Override public int hashCode() { return (int)this.uniqueId; } @Override public boolean equals(Object o) { if (o == null) { return false; } if (!(o instanceof StatisticsImpl)) { return false; } StatisticsImpl other = (StatisticsImpl)o; return this.uniqueId == other.getUniqueId(); } private final static int getIntId(StatisticDescriptor descriptor) { return ((StatisticDescriptorImpl)descriptor).checkInt(); } private final static int getLongId(StatisticDescriptor descriptor) { return ((StatisticDescriptorImpl)descriptor).checkLong(); } private final static int getDoubleId(StatisticDescriptor descriptor) { return ((StatisticDescriptorImpl)descriptor).checkDouble(); } /** * Returns the value of the specified statistic descriptor. */ private final Number _get(StatisticDescriptorImpl stat) { switch (stat.getTypeCode()) { case StatisticDescriptorImpl.INT: return Integer.valueOf(_getInt(stat.getId())); case StatisticDescriptorImpl.LONG: return Long.valueOf(_getLong(stat.getId())); case StatisticDescriptorImpl.DOUBLE: return Double.valueOf(_getDouble(stat.getId())); default: throw new RuntimeException(LocalizedStrings.StatisticsImpl_UNEXPECTED_STAT_DESCRIPTOR_TYPE_CODE_0.toLocalizedString(Byte.valueOf(stat.getTypeCode()))); } } /** * Returns the bits that represent the raw value of the * specified statistic descriptor. */ private final long _getRawBits(StatisticDescriptorImpl stat) { switch (stat.getTypeCode()) { case StatisticDescriptorImpl.INT: return _getInt(stat.getId()); case StatisticDescriptorImpl.LONG: return _getLong(stat.getId()); case StatisticDescriptorImpl.DOUBLE: return Double.doubleToRawLongBits(_getDouble(stat.getId())); default: throw new RuntimeException(LocalizedStrings.StatisticsImpl_UNEXPECTED_STAT_DESCRIPTOR_TYPE_CODE_0.toLocalizedString(Byte.valueOf(stat.getTypeCode()))); } } @Override public String toString() { final StringBuilder sb = new StringBuilder(getClass().getName()); sb.append("@").append(System.identityHashCode(this)).append("{"); sb.append("uniqueId=").append(this.uniqueId); sb.append(", numericId=").append(this.numericId); sb.append(", textId=").append(this.textId); sb.append(", type=").append(this.type.getName()); sb.append(", closed=").append(this.closed); sb.append("}"); return sb.toString(); } }





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