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A driver for DataStax Enterprise (DSE)
and Apache Cassandra 1.2+ clusters that works exclusively with the
Cassandra Query Language version 3 (CQL3) and Cassandra's binary protocol,
supporting DSE-specific features such as geospatial types, DSE Graph and DSE authentication.
/*
* Copyright (C) 2012-2017 DataStax Inc.
*
* This software can be used solely with DataStax Enterprise. Please consult the license at
* http://www.datastax.com/terms/datastax-dse-driver-license-terms
*/
package com.datastax.driver.core;
import com.datastax.driver.core.utils.MoreObjects;
import com.google.common.collect.ImmutableMap;
import java.nio.ByteBuffer;
import java.util.Map;
public class TableOptionsMetadata {
private static final String COMMENT = "comment";
private static final String READ_REPAIR = "read_repair_chance";
private static final String DCLOCAL_READ_REPAIR = "dclocal_read_repair_chance";
private static final String LOCAL_READ_REPAIR = "local_read_repair_chance";
private static final String REPLICATE_ON_WRITE = "replicate_on_write";
private static final String GC_GRACE = "gc_grace_seconds";
private static final String BF_FP_CHANCE = "bloom_filter_fp_chance";
private static final String CACHING = "caching";
private static final String COMPACTION = "compaction";
private static final String COMPACTION_CLASS = "compaction_strategy_class";
private static final String COMPACTION_OPTIONS = "compaction_strategy_options";
private static final String POPULATE_CACHE_ON_FLUSH = "populate_io_cache_on_flush";
private static final String COMPRESSION = "compression";
private static final String COMPRESSION_PARAMS = "compression_parameters";
private static final String MEMTABLE_FLUSH_PERIOD_MS = "memtable_flush_period_in_ms";
private static final String DEFAULT_TTL = "default_time_to_live";
private static final String SPECULATIVE_RETRY = "speculative_retry";
private static final String INDEX_INTERVAL = "index_interval";
private static final String MIN_INDEX_INTERVAL = "min_index_interval";
private static final String MAX_INDEX_INTERVAL = "max_index_interval";
private static final String CRC_CHECK_CHANCE = "crc_check_chance";
private static final String EXTENSIONS = "extensions";
private static final String CDC = "cdc";
private static final boolean DEFAULT_REPLICATE_ON_WRITE = true;
private static final double DEFAULT_BF_FP_CHANCE = 0.01;
private static final boolean DEFAULT_POPULATE_CACHE_ON_FLUSH = false;
private static final int DEFAULT_MEMTABLE_FLUSH_PERIOD = 0;
private static final int DEFAULT_DEFAULT_TTL = 0;
private static final String DEFAULT_SPECULATIVE_RETRY = "NONE";
private static final int DEFAULT_INDEX_INTERVAL = 128;
private static final int DEFAULT_MIN_INDEX_INTERVAL = 128;
private static final int DEFAULT_MAX_INDEX_INTERVAL = 2048;
private static final double DEFAULT_CRC_CHECK_CHANCE = 1.0;
private static final boolean DEFAULT_CDC = false;
private final boolean isCompactStorage;
private final String comment;
private final double readRepair;
private final double localReadRepair;
private final boolean replicateOnWrite;
private final int gcGrace;
private final double bfFpChance;
private final Map caching;
private final boolean populateCacheOnFlush;
private final int memtableFlushPeriodMs;
private final int defaultTTL;
private final String speculativeRetry;
private final Integer indexInterval;
private final Integer minIndexInterval;
private final Integer maxIndexInterval;
private final Map compaction;
private final Map compression;
private final Double crcCheckChance;
private final Map extensions;
private final boolean cdc;
TableOptionsMetadata(Row row, boolean isCompactStorage, VersionNumber version) {
boolean is120 = version.getMajor() < 2;
boolean is200 = version.getMajor() == 2 && version.getMinor() == 0;
boolean is210 = version.getMajor() == 2 && version.getMinor() >= 1;
boolean is400OrHigher = version.getMajor() > 3;
boolean is380OrHigher = is400OrHigher || version.getMajor() == 3 && version.getMinor() >= 8;
boolean is300OrHigher = version.getMajor() > 2;
boolean is210OrHigher = is210 || is300OrHigher;
this.isCompactStorage = isCompactStorage;
this.comment = isNullOrAbsent(row, COMMENT) ? "" : row.getString(COMMENT);
this.readRepair = row.getDouble(READ_REPAIR);
if (is300OrHigher)
this.localReadRepair = row.getDouble(DCLOCAL_READ_REPAIR);
else
this.localReadRepair = row.getDouble(LOCAL_READ_REPAIR);
this.replicateOnWrite = is210OrHigher || isNullOrAbsent(row, REPLICATE_ON_WRITE) ? DEFAULT_REPLICATE_ON_WRITE : row.getBool(REPLICATE_ON_WRITE);
this.gcGrace = row.getInt(GC_GRACE);
this.bfFpChance = isNullOrAbsent(row, BF_FP_CHANCE) ? DEFAULT_BF_FP_CHANCE : row.getDouble(BF_FP_CHANCE);
this.populateCacheOnFlush = isNullOrAbsent(row, POPULATE_CACHE_ON_FLUSH) ? DEFAULT_POPULATE_CACHE_ON_FLUSH : row.getBool(POPULATE_CACHE_ON_FLUSH);
this.memtableFlushPeriodMs = is120 || isNullOrAbsent(row, MEMTABLE_FLUSH_PERIOD_MS) ? DEFAULT_MEMTABLE_FLUSH_PERIOD : row.getInt(MEMTABLE_FLUSH_PERIOD_MS);
this.defaultTTL = is120 || isNullOrAbsent(row, DEFAULT_TTL) ? DEFAULT_DEFAULT_TTL : row.getInt(DEFAULT_TTL);
this.speculativeRetry = is120 || isNullOrAbsent(row, SPECULATIVE_RETRY) ? DEFAULT_SPECULATIVE_RETRY : row.getString(SPECULATIVE_RETRY);
if (is200)
this.indexInterval = isNullOrAbsent(row, INDEX_INTERVAL) ? DEFAULT_INDEX_INTERVAL : row.getInt(INDEX_INTERVAL);
else
this.indexInterval = null;
if (is210OrHigher) {
this.minIndexInterval = isNullOrAbsent(row, MIN_INDEX_INTERVAL)
? DEFAULT_MIN_INDEX_INTERVAL
: row.getInt(MIN_INDEX_INTERVAL);
this.maxIndexInterval = isNullOrAbsent(row, MAX_INDEX_INTERVAL)
? DEFAULT_MAX_INDEX_INTERVAL
: row.getInt(MAX_INDEX_INTERVAL);
} else {
this.minIndexInterval = null;
this.maxIndexInterval = null;
}
if (is300OrHigher) {
this.caching = ImmutableMap.copyOf(row.getMap(CACHING, String.class, String.class));
} else if (is210) {
this.caching = ImmutableMap.copyOf(SimpleJSONParser.parseStringMap(row.getString(CACHING)));
} else {
this.caching = ImmutableMap.of("keys", row.getString(CACHING));
}
if (is300OrHigher)
this.compaction = ImmutableMap.copyOf(row.getMap(COMPACTION, String.class, String.class));
else {
this.compaction = ImmutableMap.builder()
.put("class", row.getString(COMPACTION_CLASS))
.putAll(SimpleJSONParser.parseStringMap(row.getString(COMPACTION_OPTIONS)))
.build();
}
if (is300OrHigher)
this.compression = ImmutableMap.copyOf(row.getMap(COMPRESSION, String.class, String.class));
else
this.compression = ImmutableMap.copyOf(SimpleJSONParser.parseStringMap(row.getString(COMPRESSION_PARAMS)));
if (is300OrHigher)
this.crcCheckChance = isNullOrAbsent(row, CRC_CHECK_CHANCE)
? DEFAULT_CRC_CHECK_CHANCE
: row.getDouble(CRC_CHECK_CHANCE);
else
this.crcCheckChance = null;
if (is300OrHigher)
this.extensions = ImmutableMap.copyOf(row.getMap(EXTENSIONS, String.class, ByteBuffer.class));
else
this.extensions = ImmutableMap.of();
if (is380OrHigher)
this.cdc = isNullOrAbsent(row, CDC)
? DEFAULT_CDC
: row.getBool(CDC);
else
this.cdc = DEFAULT_CDC;
}
private static boolean isNullOrAbsent(Row row, String name) {
return row.getColumnDefinitions().getIndexOf(name) < 0
|| row.isNull(name);
}
/**
* Returns whether the table uses the {@code COMPACT STORAGE} option.
*
* @return whether the table uses the {@code COMPACT STORAGE} option.
*/
public boolean isCompactStorage() {
return isCompactStorage;
}
/**
* Returns the commentary set for this table.
*
* @return the commentary set for this table, or {@code null} if noe has been set.
*/
public String getComment() {
return comment;
}
/**
* Returns the chance with which a read repair is triggered for this table.
*
* @return the read repair chance set for table (in [0.0, 1.0]).
*/
public double getReadRepairChance() {
return readRepair;
}
/**
* Returns the cluster local read repair chance set for this table.
*
* @return the local read repair chance set for table (in [0.0, 1.0]).
*/
public double getLocalReadRepairChance() {
return localReadRepair;
}
/**
* Returns whether replicateOnWrite is set for this table.
*
* This is only meaningful for tables holding counters.
*
* @return whether replicateOnWrite is set for this table.
*/
public boolean getReplicateOnWrite() {
return replicateOnWrite;
}
/**
* Returns the tombstone garbage collection grace time in seconds for this table.
*
* @return the tombstone garbage collection grace time in seconds for this table.
*/
public int getGcGraceInSeconds() {
return gcGrace;
}
/**
* Returns the false positive chance for the Bloom filter of this table.
*
* @return the Bloom filter false positive chance for this table (in [0.0, 1.0]).
*/
public double getBloomFilterFalsePositiveChance() {
return bfFpChance;
}
/**
* Returns the caching options for this table.
*
* @return an immutable map containing the caching options for this table.
*/
public Map getCaching() {
return caching;
}
/**
* Whether the populate I/O cache on flush is set on this table.
*
* @return whether the populate I/O cache on flush is set on this table.
*/
public boolean getPopulateIOCacheOnFlush() {
return populateCacheOnFlush;
}
/*
* Returns the memtable flush period (in milliseconds) option for this table.
*
* Note: this option is not available in Cassandra 1.2 and will return 0 (no periodic
* flush) when connected to 1.2 nodes.
*
* @return the memtable flush period option for this table or 0 if no
* periodic flush is configured.
*/
public int getMemtableFlushPeriodInMs() {
return memtableFlushPeriodMs;
}
/**
* Returns the default TTL for this table.
*
* Note: this option is not available in Cassandra 1.2 and will return 0 (no default
* TTL) when connected to 1.2 nodes.
*
* @return the default TTL for this table or 0 if no default TTL is
* configured.
*/
public int getDefaultTimeToLive() {
return defaultTTL;
}
/**
* Returns the speculative retry option for this table.
*
* Note: this option is not available in Cassandra 1.2 and will return "NONE" (no
* speculative retry) when connected to 1.2 nodes.
*
* @return the speculative retry option this table.
*/
public String getSpeculativeRetry() {
return speculativeRetry;
}
/**
* Returns the index interval option for this table.
*
* Note: this option is not available in Cassandra 1.2 (more precisely, it is not
* configurable per-table) and will return 128 (the default index interval) when
* connected to 1.2 nodes. It is deprecated in Cassandra 2.1 and above, and will
* therefore return {@code null} for 2.1 nodes.
*
* @return the index interval option for this table.
*/
public Integer getIndexInterval() {
return indexInterval;
}
/**
* Returns the minimum index interval option for this table.
*
* Note: this option is available in Cassandra 2.1 and above, and will return
* {@code null} for earlier versions.
*
* @return the minimum index interval option for this table.
*/
public Integer getMinIndexInterval() {
return minIndexInterval;
}
/**
* Returns the maximum index interval option for this table.
*
* Note: this option is available in Cassandra 2.1 and above, and will return
* {@code null} for earlier versions.
*
* @return the maximum index interval option for this table.
*/
public Integer getMaxIndexInterval() {
return maxIndexInterval;
}
/**
* When compression is enabled, this option defines the probability
* with which checksums for compressed blocks are checked during reads.
* The default value for this options is 1.0 (always check).
*
* Note that this option is available in Cassandra 3.0.0 and above, when it
* became a "top-level" table option, whereas previously it was a suboption
* of the {@link #getCompression() compression} option.
*
* For Cassandra versions prior to 3.0.0, this method always returns {@code null}.
*
* @return the probability with which checksums for compressed blocks are checked during reads
*/
public Double getCrcCheckChance() {
return crcCheckChance;
}
/**
* Returns the compaction options for this table.
*
* @return an immutable map containing the compaction options for this table.
*/
public Map getCompaction() {
return compaction;
}
/**
* Returns the compression options for this table.
*
* @return an immutable map containing the compression options for this table.
*/
public Map getCompression() {
return compression;
}
/**
* Returns the extension options for this table.
*
* For Cassandra versions prior to 3.0.0, this method always returns an empty map.
*
* @return an immutable map containing the extension options for this table.
*/
public Map getExtensions() {
return extensions;
}
/**
* Returns whether or not change data capture is enabled for this table.
*
* For Cassandra versions prior to 3.8.0, this method always returns false.
*
* @return whether or not change data capture is enabled for this table.
*/
public boolean isCDC() {
return cdc;
}
@Override
public boolean equals(Object other) {
if (other == this)
return true;
if (!(other instanceof TableOptionsMetadata))
return false;
TableOptionsMetadata that = (TableOptionsMetadata) other;
return this.isCompactStorage == that.isCompactStorage &&
MoreObjects.equal(this.comment, that.comment) &&
this.readRepair == that.readRepair &&
this.localReadRepair == that.localReadRepair &&
this.replicateOnWrite == that.replicateOnWrite &&
this.gcGrace == that.gcGrace &&
this.bfFpChance == that.bfFpChance &&
MoreObjects.equal(this.caching, that.caching) &&
this.populateCacheOnFlush == that.populateCacheOnFlush &&
this.memtableFlushPeriodMs == that.memtableFlushPeriodMs &&
this.defaultTTL == that.defaultTTL &&
this.cdc == that.cdc &&
MoreObjects.equal(this.speculativeRetry, that.speculativeRetry) &&
MoreObjects.equal(this.indexInterval, that.indexInterval) &&
MoreObjects.equal(this.minIndexInterval, that.minIndexInterval) &&
MoreObjects.equal(this.maxIndexInterval, that.maxIndexInterval) &&
MoreObjects.equal(this.compaction, that.compaction) &&
MoreObjects.equal(this.compression, that.compression) &&
MoreObjects.equal(this.crcCheckChance, that.crcCheckChance) &&
MoreObjects.equal(this.extensions, that.extensions);
}
@Override
public int hashCode() {
return MoreObjects.hashCode(isCompactStorage, comment, readRepair, localReadRepair, replicateOnWrite, gcGrace,
bfFpChance, caching, populateCacheOnFlush, memtableFlushPeriodMs, defaultTTL, speculativeRetry,
indexInterval, minIndexInterval, maxIndexInterval, compaction, compression, crcCheckChance, extensions,
cdc);
}
}