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SnappyData store based off Pivotal GemFireXD
/*
* 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;
/**
* StatArchiveFormat defines constants related to the statistic archive
* file format.
*/
public interface StatArchiveFormat {
/**
* ARCHIVE_VERSION identifies the format of the contents of the archive.
* It should be changed any time an incompatible change is made.
* Its current value is 3.
*
*
* - Changed from 2 to 3 with addition of
RESOURCE_INSTANCE_INITIALIZE_TOKEN
* - Changed from 3 to 4 with addition of largerBetter boolean in statistic descriptor
*
*/
public static final byte ARCHIVE_VERSION=4;
/**
* Token consists of a timestamp and any statistic value changes.
*/
public static final byte SAMPLE_TOKEN=0;
/**
* Token defines a new resource type.
*/
public static final byte RESOURCE_TYPE_TOKEN=1;
/**
* Token defines a new resource instance.
*/
public static final byte RESOURCE_INSTANCE_CREATE_TOKEN=2;
/**
* Token notes that a previous resource instance no longer exists
* and thus will have any more samples of its statistic values taken.
*/
public static final byte RESOURCE_INSTANCE_DELETE_TOKEN=3;
/**
* Token defines a new resource instance with initial data.
*/
public static final byte RESOURCE_INSTANCE_INITIALIZE_TOKEN=4;
/**
* Token defines a new archive and provides some global information
* about the environment the archive was created in.
*/
public static final byte HEADER_TOKEN=77;
/**
* The value used to signal the end of a list of resource instances.
*/
public static final int ILLEGAL_RESOURCE_INST_ID=-1;
/**
* The maximum value a resource inst id can have and still be stored
* in the archive as an unsigned byte.
*/
public static final int MAX_BYTE_RESOURCE_INST_ID=252;
/**
* Used to say that the next two bytes contain the resource inst id
* as an unsigned short.
*/
public static final int SHORT_RESOURCE_INST_ID_TOKEN=253;
/**
* Used to say that the next four bytes contain the resource inst id
* as an int.
*/
public static final int INT_RESOURCE_INST_ID_TOKEN=254;
/**
* Used to say that the current byte represents the ILLEGAL_RESOURCE_INST_ID.
*/
public static final int ILLEGAL_RESOURCE_INST_ID_TOKEN=255;
/**
* The maximum value a resource inst id can have and still be stored
* in the archive as an unsigned short.
*/
public static final int MAX_SHORT_RESOURCE_INST_ID=65535;
/**
* The value used to signal the end of a list of statistic samples.
*/
public static final int ILLEGAL_STAT_OFFSET=255;
/**
* The maximum value a timestamp can have and still be stored
* in the archive as an unsigned short.
*/
public static final int MAX_SHORT_TIMESTAMP=65534;
/**
* Means the next 4 bytes contain the timestamp as an int.
*/
public static final int INT_TIMESTAMP_TOKEN=65535;
/**
* The maximum value a compact value can have and still be stored
* in the archive as one byte.
*/
public static final int MAX_1BYTE_COMPACT_VALUE=Byte.MAX_VALUE;
/**
* The minimum value a compact value can have and still be stored
* in the archive as one byte.
*/
public static final int MIN_1BYTE_COMPACT_VALUE=Byte.MIN_VALUE+7;
/**
* The maximum value a compact value can have and still be stored
* in the archive as two bytes.
*/
public static final int MAX_2BYTE_COMPACT_VALUE=Short.MAX_VALUE;
/**
* The minimum value a compact value can have and still be stored
* in the archive as two bytes.
*/
public static final int MIN_2BYTE_COMPACT_VALUE=Short.MIN_VALUE;
/**
* Means the next 2 bytes hold the compact value's data.
*/
public static final int COMPACT_VALUE_2_TOKEN=Byte.MIN_VALUE;
/**
* Means the next 3 bytes hold the compact value's data.
*/
public static final int COMPACT_VALUE_3_TOKEN=Byte.MIN_VALUE+1;
/**
* Means the next 4 bytes hold the compact value's data.
*/
public static final int COMPACT_VALUE_4_TOKEN=Byte.MIN_VALUE+2;
/**
* Means the next 5 bytes hold the compact value's data.
*/
public static final int COMPACT_VALUE_5_TOKEN=Byte.MIN_VALUE+3;
/**
* Means the next 6 bytes hold the compact value's data.
*/
public static final int COMPACT_VALUE_6_TOKEN=Byte.MIN_VALUE+4;
/**
* Means the next 7 bytes hold the compact value's data.
*/
public static final int COMPACT_VALUE_7_TOKEN=Byte.MIN_VALUE+5;
/**
* Means the next 8 bytes hold the compact value's data.
*/
public static final int COMPACT_VALUE_8_TOKEN=Byte.MIN_VALUE+6;
/**
* Statistic represents a boolean java primitive.
*/
public static final int BOOLEAN_CODE = 1;
/**
* Statistic represents a char java primitive.
*/
public static final int CHAR_CODE = 2;
/**
* Statistic represents a char java primitive.
*/
public static final int WCHAR_CODE = 12;
/**
* Statistic represents a byte java primitive.
*/
public static final int BYTE_CODE = 3;
/**
* Statistic represents a short java primitive.
*/
public static final int SHORT_CODE = 4;
/**
* Statistic represents a int java primitive.
*/
public static final int INT_CODE = 5;
/**
* Statistic represents a long java primitive.
*/
public static final int LONG_CODE = 6;
/**
* Statistic represents a float java primitive.
*/
public static final int FLOAT_CODE = 7;
/**
* Statistic represents a double java primitive.
*/
public static final int DOUBLE_CODE = 8;
/**
* Number of nanoseconds in one millisecond
*/
public static final long NANOS_PER_MILLI = 1000000;
}