/**
* 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.cassandra.config;
import java.io.*;
import java.net.InetAddress;
import java.net.URL;
import java.net.UnknownHostException;
import java.nio.ByteBuffer;
import java.util.*;
import com.google.common.base.Charsets;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.auth.AllowAllAuthenticator;
import org.apache.cassandra.auth.AllowAllAuthority;
import org.apache.cassandra.auth.IAuthenticator;
import org.apache.cassandra.auth.IAuthority;
import org.apache.cassandra.config.Config.RequestSchedulerId;
import org.apache.cassandra.db.ColumnFamilyType;
import org.apache.cassandra.db.DefsTable;
import org.apache.cassandra.db.Table;
import org.apache.cassandra.db.marshal.AbstractType;
import org.apache.cassandra.db.migration.Migration;
import org.apache.cassandra.dht.IPartitioner;
import org.apache.cassandra.io.sstable.Descriptor;
import org.apache.cassandra.io.util.FileUtils;
import org.apache.cassandra.locator.*;
import org.apache.cassandra.scheduler.IRequestScheduler;
import org.apache.cassandra.scheduler.NoScheduler;
import org.apache.cassandra.utils.FBUtilities;
import org.apache.cassandra.utils.Pair;
import org.yaml.snakeyaml.Loader;
import org.yaml.snakeyaml.TypeDescription;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.error.YAMLException;
public class DatabaseDescriptor
{
private static Logger logger = LoggerFactory.getLogger(DatabaseDescriptor.class);
private static IEndpointSnitch snitch;
private static InetAddress listenAddress; // leave null so we can fall through to getLocalHost
private static InetAddress rpcAddress;
private static Set<InetAddress> seeds = new HashSet<InetAddress>();
/* Current index into the above list of directories */
private static int currentIndex = 0;
private static int consistencyThreads = 4; // not configurable
static Map<String, KSMetaData> tables = new HashMap<String, KSMetaData>();
/* Hashing strategy Random or OPHF */
private static IPartitioner partitioner;
private static Config.DiskAccessMode indexAccessMode;
private static Config conf;
private static IAuthenticator authenticator = new AllowAllAuthenticator();
private static IAuthority authority = new AllowAllAuthority();
private final static String DEFAULT_CONFIGURATION = "cassandra.yaml";
private static IRequestScheduler requestScheduler;
private static RequestSchedulerId requestSchedulerId;
private static RequestSchedulerOptions requestSchedulerOptions;
public static final UUID INITIAL_VERSION = new UUID(4096, 0); // has type nibble set to 1, everything else to zero.
private static UUID defsVersion = INITIAL_VERSION;
/**
* Inspect the classpath to find storage configuration file
*/
static URL getStorageConfigURL() throws ConfigurationException
{
String configUrl = System.getProperty("cassandra.config");
if (configUrl == null)
configUrl = DEFAULT_CONFIGURATION;
URL url;
try
{
url = new URL(configUrl);
url.openStream(); // catches well-formed but bogus URLs
}
catch (Exception e)
{
ClassLoader loader = DatabaseDescriptor.class.getClassLoader();
url = loader.getResource(configUrl);
if (url == null)
throw new ConfigurationException("Cannot locate " + configUrl);
}
return url;
}
static
{
try
{
URL url = getStorageConfigURL();
logger.info("Loading settings from " + url);
InputStream input = null;
try
{
input = url.openStream();
}
catch (IOException e)
{
// getStorageConfigURL should have ruled this out
throw new AssertionError(e);
}
org.yaml.snakeyaml.constructor.Constructor constructor = new org.yaml.snakeyaml.constructor.Constructor(Config.class);
TypeDescription desc = new TypeDescription(Config.class);
desc.putListPropertyType("keyspaces", RawKeyspace.class);
TypeDescription ksDesc = new TypeDescription(RawKeyspace.class);
ksDesc.putListPropertyType("column_families", RawColumnFamily.class);
TypeDescription cfDesc = new TypeDescription(RawColumnFamily.class);
cfDesc.putListPropertyType("column_metadata", RawColumnDefinition.class);
constructor.addTypeDescription(desc);
constructor.addTypeDescription(ksDesc);
constructor.addTypeDescription(cfDesc);
Yaml yaml = new Yaml(new Loader(constructor));
conf = (Config)yaml.load(input);
if (conf.commitlog_sync == null)
{
throw new ConfigurationException("Missing required directive CommitLogSync");
}
if (conf.commitlog_sync == Config.CommitLogSync.batch)
{
if (conf.commitlog_sync_batch_window_in_ms == null)
{
throw new ConfigurationException("Missing value for commitlog_sync_batch_window_in_ms: Double expected.");
}
else if (conf.commitlog_sync_period_in_ms != null)
{
throw new ConfigurationException("Batch sync specified, but commitlog_sync_period_in_ms found. Only specify commitlog_sync_batch_window_in_ms when using batch sync");
}
logger.debug("Syncing log with a batch window of " + conf.commitlog_sync_batch_window_in_ms);
}
else
{
if (conf.commitlog_sync_period_in_ms == null)
{
throw new ConfigurationException("Missing value for commitlog_sync_period_in_ms: Integer expected");
}
else if (conf.commitlog_sync_batch_window_in_ms != null)
{
throw new ConfigurationException("commitlog_sync_period_in_ms specified, but commitlog_sync_batch_window_in_ms found. Only specify commitlog_sync_period_in_ms when using periodic sync.");
}
logger.debug("Syncing log with a period of " + conf.commitlog_sync_period_in_ms);
}
/* evaluate the DiskAccessMode Config directive, which also affects indexAccessMode selection */
if (conf.disk_access_mode == Config.DiskAccessMode.auto)
{
conf.disk_access_mode = System.getProperty("os.arch").contains("64") ? Config.DiskAccessMode.mmap : Config.DiskAccessMode.standard;
indexAccessMode = conf.disk_access_mode;
logger.info("DiskAccessMode 'auto' determined to be " + conf.disk_access_mode + ", indexAccessMode is " + indexAccessMode );
}
else if (conf.disk_access_mode == Config.DiskAccessMode.mmap_index_only)
{
conf.disk_access_mode = Config.DiskAccessMode.standard;
indexAccessMode = Config.DiskAccessMode.mmap;
logger.info("DiskAccessMode is " + conf.disk_access_mode + ", indexAccessMode is " + indexAccessMode );
}
else
{
indexAccessMode = conf.disk_access_mode;
logger.info("DiskAccessMode is " + conf.disk_access_mode + ", indexAccessMode is " + indexAccessMode );
}
/* Authentication and authorization backend, implementing IAuthenticator and IAuthority */
if (conf.authenticator != null)
authenticator = FBUtilities.<IAuthenticator>construct(conf.authenticator, "authenticator");
if (conf.authority != null)
authority = FBUtilities.<IAuthority>construct(conf.authority, "authority");
authenticator.validateConfiguration();
authority.validateConfiguration();
/* Hashing strategy */
if (conf.partitioner == null)
{
throw new ConfigurationException("Missing directive: partitioner");
}
try
{
partitioner = FBUtilities.newPartitioner(conf.partitioner);
}
catch (Exception e)
{
throw new ConfigurationException("Invalid partitioner class " + conf.partitioner);
}
/* phi convict threshold for FailureDetector */
if (conf.phi_convict_threshold < 5 || conf.phi_convict_threshold > 16)
{
throw new ConfigurationException("phi_convict_threshold must be between 5 and 16");
}
/* Thread per pool */
if (conf.concurrent_reads != null && conf.concurrent_reads < 2)
{
throw new ConfigurationException("concurrent_reads must be at least 2");
}
if (conf.concurrent_writes != null && conf.concurrent_writes < 2)
{
throw new ConfigurationException("concurrent_writes must be at least 2");
}
/* Memtable flush writer threads */
if (conf.memtable_flush_writers != null && conf.memtable_flush_writers < 1)
{
throw new ConfigurationException("memtable_flush_writers must be at least 1");
}
else if (conf.memtable_flush_writers == null)
{
conf.memtable_flush_writers = conf.data_file_directories.length;
}
/* Local IP or hostname to bind services to */
if (conf.listen_address != null)
{
if (conf.listen_address.equals("0.0.0.0"))
{
throw new ConfigurationException("listen_address must be a single interface. See http://wiki.apache.org/cassandra/FAQ#cant_listen_on_ip_any");
}
try
{
listenAddress = InetAddress.getByName(conf.listen_address);
}
catch (UnknownHostException e)
{
throw new ConfigurationException("Unknown listen_address '" + conf.listen_address + "'");
}
}
/* Local IP or hostname to bind RPC server to */
if (conf.rpc_address != null)
{
try
{
rpcAddress = InetAddress.getByName(conf.rpc_address);
}
catch (UnknownHostException e)
{
throw new ConfigurationException("Unknown host in rpc_address " + conf.rpc_address);
}
}
if (conf.thrift_framed_transport_size_in_mb > 0 && conf.thrift_max_message_length_in_mb < conf.thrift_framed_transport_size_in_mb)
{
throw new ConfigurationException("thrift_max_message_length_in_mb must be greater than thrift_framed_transport_size_in_mb when using TFramedTransport");
}
/* compaction thread priority */
if (conf.compaction_thread_priority < Thread.MIN_PRIORITY || conf.compaction_thread_priority > Thread.NORM_PRIORITY)
{
throw new ConfigurationException("compaction_thread_priority must be between 1 and 5");
}
/* end point snitch */
if (conf.endpoint_snitch == null)
{
throw new ConfigurationException("Missing endpoint_snitch directive");
}
snitch = createEndpointSnitch(conf.endpoint_snitch);
EndpointSnitchInfo.create();
/* Request Scheduler setup */
requestSchedulerOptions = conf.request_scheduler_options;
if (conf.request_scheduler != null)
{
try
{
if (requestSchedulerOptions == null)
{
requestSchedulerOptions = new RequestSchedulerOptions();
}
Class cls = Class.forName(conf.request_scheduler);
requestScheduler = (IRequestScheduler) cls.getConstructor(RequestSchedulerOptions.class).newInstance(requestSchedulerOptions);
}
catch (ClassNotFoundException e)
{
throw new ConfigurationException("Invalid Request Scheduler class " + conf.request_scheduler);
}
catch (Exception e)
{
throw new ConfigurationException("Unable to instantiate request scheduler", e);
}
}
else
{
requestScheduler = new NoScheduler();
}
if (conf.request_scheduler_id == RequestSchedulerId.keyspace)
{
requestSchedulerId = conf.request_scheduler_id;
}
else
{
// Default to Keyspace
requestSchedulerId = RequestSchedulerId.keyspace;
}
if (logger.isDebugEnabled() && conf.auto_bootstrap != null)
{
logger.debug("setting auto_bootstrap to " + conf.auto_bootstrap);
}
if (conf.in_memory_compaction_limit_in_mb != null && conf.in_memory_compaction_limit_in_mb <= 0)
{
throw new ConfigurationException("in_memory_compaction_limit_in_mb must be a positive integer");
}
/* data file and commit log directories. they get created later, when they're needed. */
if (conf.commitlog_directory != null && conf.data_file_directories != null && conf.saved_caches_directory != null)
{
for (String datadir : conf.data_file_directories)
{
if (datadir.equals(conf.commitlog_directory))
throw new ConfigurationException("commitlog_directory must not be the same as any data_file_directories");
if (datadir.equals(conf.saved_caches_directory))
throw new ConfigurationException("saved_caches_directory must not be the same as any data_file_directories");
}
if (conf.commitlog_directory.equals(conf.saved_caches_directory))
throw new ConfigurationException("saved_caches_directory must not be the same as the commitlog_directory");
}
else
{
if (conf.commitlog_directory == null)
throw new ConfigurationException("commitlog_directory missing");
if (conf.data_file_directories == null)
throw new ConfigurationException("data_file_directories missing; at least one data directory must be specified");
if (conf.saved_caches_directory == null)
throw new ConfigurationException("saved_caches_directory missing");
}
// Hardcoded system tables
KSMetaData systemMeta = new KSMetaData(Table.SYSTEM_TABLE,
LocalStrategy.class,
null,
1,
CFMetaData.StatusCf,
CFMetaData.HintsCf,
CFMetaData.MigrationsCf,
CFMetaData.SchemaCf,
CFMetaData.IndexCf);
CFMetaData.map(CFMetaData.StatusCf);
CFMetaData.map(CFMetaData.HintsCf);
CFMetaData.map(CFMetaData.MigrationsCf);
CFMetaData.map(CFMetaData.SchemaCf);
CFMetaData.map(CFMetaData.IndexCf);
tables.put(Table.SYSTEM_TABLE, systemMeta);
/* Load the seeds for node contact points */
if (conf.seeds == null || conf.seeds.length <= 0)
{
throw new ConfigurationException("seeds missing; a minimum of one seed is required.");
}
for (String seedString : conf.seeds)
{
try
{
seeds.add(InetAddress.getByName(seedString));
}
catch (UnknownHostException e)
{
throw new ConfigurationException("Unknown seed " + seedString + ". Consider using IP addresses instead of host names");
}
}
}
catch (ConfigurationException e)
{
logger.error("Fatal configuration error", e);
System.err.println(e.getMessage() + "\nFatal configuration error; unable to start server. See log for stacktrace.");
System.exit(1);
}
catch (YAMLException e)
{
logger.error("Fatal configuration error error", e);
System.err.println(e.getMessage() + "\nInvalid yaml; unable to start server. See log for stacktrace.");
System.exit(1);
}
}
private static IEndpointSnitch createEndpointSnitch(String endpointSnitchClassName) throws ConfigurationException
{
IEndpointSnitch snitch = FBUtilities.construct(endpointSnitchClassName, "snitch");
return conf.dynamic_snitch ? new DynamicEndpointSnitch(snitch) : snitch;
}
/** load keyspace (table) definitions, but do not initialize the table instances. */
public static void loadSchemas() throws IOException
{
// we can load tables from local storage if a version is set in the system table and that acutally maps to
// real data in the definitions table. If we do end up loading from xml, store the defintions so that we
// don't load from xml anymore.
UUID uuid = Migration.getLastMigrationId();
if (uuid == null)
{
logger.info("Couldn't detect any schema definitions in local storage.");
// peek around the data directories to see if anything is there.
boolean hasExistingTables = false;
for (String dataDir : DatabaseDescriptor.getAllDataFileLocations())
{
File dataPath = new File(dataDir);
if (dataPath.exists() && dataPath.isDirectory())
{
// see if there are other directories present.
int dirCount = dataPath.listFiles(new FileFilter()
{
public boolean accept(File pathname)
{
return pathname.isDirectory();
}
}).length;
if (dirCount > 0)
hasExistingTables = true;
}
if (hasExistingTables)
{
break;
}
}
if (hasExistingTables)
logger.info("Found table data in data directories. Consider using JMX to call org.apache.cassandra.service.StorageService.loadSchemaFromYaml().");
else
logger.info("Consider using JMX to org.apache.cassandra.service.StorageService.loadSchemaFromYaml() or set up a schema using the system_* calls provided via thrift.");
}
else
{
logger.info("Loading schema version " + uuid.toString());
Collection<KSMetaData> tableDefs = DefsTable.loadFromStorage(uuid);
for (KSMetaData def : tableDefs)
{
if (!def.name.matches(Migration.NAME_VALIDATOR_REGEX))
throw new RuntimeException("invalid keyspace name: " + def.name);
for (CFMetaData cfm : def.cfMetaData().values())
{
if (!cfm.cfName.matches(Migration.NAME_VALIDATOR_REGEX))
throw new RuntimeException("invalid column family name: " + cfm.cfName);
try
{
CFMetaData.map(cfm);
}
catch (ConfigurationException ex)
{
throw new IOError(ex);
}
}
DatabaseDescriptor.setTableDefinition(def, uuid);
}
// happens when someone manually deletes all tables and restarts.
if (tableDefs.size() == 0)
{
logger.warn("No schema definitions were found in local storage.");
// set defsVersion so that migrations leading up to emptiness aren't replayed.
defsVersion = uuid;
}
// since we loaded definitions from local storage, log a warning if definitions exist in yaml.
if (conf.keyspaces != null && conf.keyspaces.size() > 0)
logger.warn("Schema definitions were defined both locally and in " + DEFAULT_CONFIGURATION +
". Definitions in " + DEFAULT_CONFIGURATION + " were ignored.");
}
CFMetaData.fixMaxId();
}
/** reads xml. doesn't populate any internal structures. */
public static Collection<KSMetaData> readTablesFromYaml() throws ConfigurationException
{
List<KSMetaData> defs = new ArrayList<KSMetaData>();
if (conf.keyspaces == null)
return defs;
/* Read the table related stuff from config */
for (RawKeyspace keyspace : conf.keyspaces)
{
/* parsing out the table name */
if (keyspace.name == null)
{
throw new ConfigurationException("Keyspace name attribute is required");
}
if (keyspace.name.equalsIgnoreCase(Table.SYSTEM_TABLE))
{
throw new ConfigurationException("'system' is a reserved table name for Cassandra internals");
}
/* See which replica placement strategy to use */
if (keyspace.replica_placement_strategy == null)
{
throw new ConfigurationException("Missing replica_placement_strategy directive for " + keyspace.name);
}
String strategyClassName = KSMetaData.convertOldStrategyName(keyspace.replica_placement_strategy);
Class<AbstractReplicationStrategy> strategyClass = FBUtilities.classForName(strategyClassName, "replication-strategy");
/* Data replication factor */
if (keyspace.replication_factor == null)
{
throw new ConfigurationException("Missing replication_factor directory for keyspace " + keyspace.name);
}
int size2 = keyspace.column_families.length;
CFMetaData[] cfDefs = new CFMetaData[size2];
int j = 0;
for (RawColumnFamily cf : keyspace.column_families)
{
if (cf.name == null)
{
throw new ConfigurationException("ColumnFamily name attribute is required");
}
if (!cf.name.matches(Migration.NAME_VALIDATOR_REGEX))
{
throw new ConfigurationException("ColumnFamily name contains invalid characters.");
}
// Parse out the column comparators and validators
AbstractType comparator = getComparator(cf.compare_with);
AbstractType subcolumnComparator = null;
AbstractType default_validator = getComparator(cf.default_validation_class);
ColumnFamilyType cfType = cf.column_type == null ? ColumnFamilyType.Standard : cf.column_type;
if (cfType == ColumnFamilyType.Super)
{
subcolumnComparator = getComparator(cf.compare_subcolumns_with);
}
else if (cf.compare_subcolumns_with != null)
{
throw new ConfigurationException("compare_subcolumns_with is only a valid attribute on super columnfamilies (not regular columnfamily " + cf.name + ")");
}
if (cf.read_repair_chance < 0.0 || cf.read_repair_chance > 1.0)
{
throw new ConfigurationException("read_repair_chance must be between 0.0 and 1.0 (0% and 100%)");
}
if (conf.dynamic_snitch_badness_threshold < 0.0 || conf.dynamic_snitch_badness_threshold > 1.0)
{
throw new ConfigurationException("dynamic_snitch_badness_threshold must be between 0.0 and 1.0 (0% and 100%)");
}
if (cf.min_compaction_threshold < 0 || cf.max_compaction_threshold < 0)
{
throw new ConfigurationException("min/max_compaction_thresholds must be positive integers.");
}
if ((cf.min_compaction_threshold > cf.max_compaction_threshold) && cf.max_compaction_threshold != 0)
{
throw new ConfigurationException("min_compaction_threshold must be smaller than max_compaction_threshold, or either must be 0 (disabled)");
}
if (cf.memtable_throughput_in_mb == null)
{
cf.memtable_throughput_in_mb = CFMetaData.sizeMemtableThroughput();
logger.info("memtable_throughput_in_mb not configured for " + cf.name + ", using " + cf.memtable_throughput_in_mb);
}
if (cf.memtable_operations_in_millions == null)
{
cf.memtable_operations_in_millions = CFMetaData.sizeMemtableOperations(cf.memtable_throughput_in_mb);
logger.info("memtable_operations_in_millions not configured for " + cf.name + ", using " + cf.memtable_operations_in_millions);
}
if (cf.memtable_operations_in_millions != null && cf.memtable_operations_in_millions <= 0)
{
throw new ConfigurationException("memtable_operations_in_millions must be a positive double");
}
Map<ByteBuffer, ColumnDefinition> metadata = new TreeMap<ByteBuffer, ColumnDefinition>();
for (RawColumnDefinition rcd : cf.column_metadata)
{
if (rcd.name == null)
{
throw new ConfigurationException("name is required for column definitions.");
}
if (rcd.validator_class == null)
{
throw new ConfigurationException("validator is required for column definitions");
}
if ((rcd.index_type == null) && (rcd.index_name != null))
{
throw new ConfigurationException("index_name cannot be set if index_type is not also set");
}
ByteBuffer columnName = ByteBuffer.wrap(rcd.name.getBytes(Charsets.UTF_8));
metadata.put(columnName, new ColumnDefinition(columnName, rcd.validator_class, rcd.index_type, rcd.index_name));
}
cfDefs[j++] = new CFMetaData(keyspace.name,
cf.name,
cfType,
comparator,
subcolumnComparator,
cf.comment,
cf.rows_cached,
cf.keys_cached,
cf.read_repair_chance,
cf.gc_grace_seconds,
default_validator,
cf.min_compaction_threshold,
cf.max_compaction_threshold,
cf.row_cache_save_period_in_seconds,
cf.key_cache_save_period_in_seconds,
cf.memtable_flush_after_mins,
cf.memtable_throughput_in_mb,
cf.memtable_operations_in_millions,
metadata);
}
defs.add(new KSMetaData(keyspace.name,
strategyClass,
keyspace.strategy_options,
keyspace.replication_factor,
cfDefs));
}
return defs;
}
public static IAuthenticator getAuthenticator()
{
return authenticator;
}
public static IAuthority getAuthority()
{
return authority;
}
public static boolean isThriftFramed()
{
return conf.thrift_framed_transport_size_in_mb > 0;
}
public static int getThriftMaxMessageLength()
{
return conf.thrift_max_message_length_in_mb * 1024 * 1024;
}
public static int getThriftFramedTransportSize()
{
return conf.thrift_framed_transport_size_in_mb * 1024 * 1024;
}
public static AbstractType getComparator(CharSequence compareWith) throws ConfigurationException
{
if (compareWith == null)
compareWith = "BytesType";
return FBUtilities.getComparator(compareWith.toString());
}
/**
* Creates all storage-related directories.
* @throws IOException when a disk problem is encountered.
*/
public static void createAllDirectories() throws IOException
{
try {
if (conf.data_file_directories.length == 0)
{
throw new ConfigurationException("At least one DataFileDirectory must be specified");
}
for ( String dataFileDirectory : conf.data_file_directories )
FileUtils.createDirectory(dataFileDirectory);
if (conf.commitlog_directory == null)
{
throw new ConfigurationException("commitlog_directory must be specified");
}
FileUtils.createDirectory(conf.commitlog_directory);
if (conf.saved_caches_directory == null)
{
throw new ConfigurationException("saved_caches_directory must be specified");
}
FileUtils.createDirectory(conf.saved_caches_directory);
}
catch (ConfigurationException ex) {
logger.error("Fatal error: " + ex.getMessage());
System.err.println("Bad configuration; unable to start server");
System.exit(1);
}
}
public static IPartitioner getPartitioner()
{
return partitioner;
}
public static IEndpointSnitch getEndpointSnitch()
{
return snitch;
}
public static void setEndpointSnitch(IEndpointSnitch eps)
{
snitch = eps;
}
public static IRequestScheduler getRequestScheduler()
{
return requestScheduler;
}
public static RequestSchedulerOptions getRequestSchedulerOptions()
{
return requestSchedulerOptions;
}
public static RequestSchedulerId getRequestSchedulerId()
{
return requestSchedulerId;
}
public static KSMetaData getKSMetaData(String table)
{
assert table != null;
return tables.get(table);
}
public static String getJobTrackerAddress()
{
return conf.job_tracker_host;
}
public static int getColumnIndexSize()
{
return conf.column_index_size_in_kb * 1024;
}
public static String getInitialToken()
{
return conf.initial_token;
}
public static String getClusterName()
{
return conf.cluster_name;
}
public static String getJobJarLocation()
{
return conf.job_jar_file_location;
}
public static Map<String, CFMetaData> getTableMetaData(String tableName)
{
assert tableName != null;
KSMetaData ksm = tables.get(tableName);
assert ksm != null;
return ksm.cfMetaData();
}
/*
* Given a table name & column family name, get the column family
* meta data. If the table name or column family name is not valid
* this function returns null.
*/
public static CFMetaData getCFMetaData(String tableName, String cfName)
{
assert tableName != null;
KSMetaData ksm = tables.get(tableName);
if (ksm == null)
return null;
return ksm.cfMetaData().get(cfName);
}
public static CFMetaData getCFMetaData(Integer cfId)
{
Pair<String,String> cf = CFMetaData.getCF(cfId);
if (cf == null)
return null;
return getCFMetaData(cf.left, cf.right);
}
public static ColumnFamilyType getColumnFamilyType(String tableName, String cfName)
{
assert tableName != null && cfName != null;
CFMetaData cfMetaData = getCFMetaData(tableName, cfName);
if (cfMetaData == null)
return null;
return cfMetaData.cfType;
}
public static Set<String> getTables()
{
return tables.keySet();
}
public static List<String> getNonSystemTables()
{
List<String> tableslist = new ArrayList<String>(tables.keySet());
tableslist.remove(Table.SYSTEM_TABLE);
return Collections.unmodifiableList(tableslist);
}
public static int getStoragePort()
{
return conf.storage_port;
}
public static int getRpcPort()
{
return conf.rpc_port;
}
public static long getRpcTimeout()
{
return conf.rpc_timeout_in_ms;
}
public static int getPhiConvictThreshold()
{
return conf.phi_convict_threshold;
}
public static int getConsistencyThreads()
{
return consistencyThreads;
}
public static int getConcurrentReaders()
{
return conf.concurrent_reads;
}
public static int getConcurrentWriters()
{
return conf.concurrent_writes;
}
public static int getFlushWriters()
{
return conf.memtable_flush_writers;
}
public static int getInMemoryCompactionLimit()
{
return conf.in_memory_compaction_limit_in_mb * 1024 * 1024;
}
public static String[] getAllDataFileLocations()
{
return conf.data_file_directories;
}
/**
* Get a list of data directories for a given table
*
* @param table name of the table.
*
* @return an array of path to the data directories.
*/
public static String[] getAllDataFileLocationsForTable(String table)
{
String[] tableLocations = new String[conf.data_file_directories.length];
for (int i = 0; i < conf.data_file_directories.length; i++)
{
tableLocations[i] = conf.data_file_directories[i] + File.separator + table;
}
return tableLocations;
}
public synchronized static String getNextAvailableDataLocation()
{
String dataFileDirectory = conf.data_file_directories[currentIndex];
currentIndex = (currentIndex + 1) % conf.data_file_directories.length;
return dataFileDirectory;
}
/* threshold after which commit log should be rotated. */
public static int getCommitLogSegmentSize()
{
return conf.commitlog_rotation_threshold_in_mb != null ?
conf.commitlog_rotation_threshold_in_mb * 1024 * 1024 :
128*1024*1024;
}
public static String getCommitLogLocation()
{
return conf.commitlog_directory;
}
public static String getSavedCachesLocation()
{
return conf.saved_caches_directory;
}
public static Set<InetAddress> getSeeds()
{
return seeds;
}
/*
* Loop through all the disks to see which disk has the max free space
* return the disk with max free space for compactions. If the size of the expected
* compacted file is greater than the max disk space available return null, we cannot
* do compaction in this case.
*/
public static String getDataFileLocationForTable(String table, long expectedCompactedFileSize)
{
long maxFreeDisk = 0;
int maxDiskIndex = 0;
String dataFileDirectory = null;
String[] dataDirectoryForTable = getAllDataFileLocationsForTable(table);
for ( int i = 0 ; i < dataDirectoryForTable.length ; i++ )
{
File f = new File(dataDirectoryForTable[i]);
if( maxFreeDisk < f.getUsableSpace())
{
maxFreeDisk = f.getUsableSpace();
maxDiskIndex = i;
}
}
// Load factor of 0.9 we do not want to use the entire disk that is too risky.
maxFreeDisk = (long)(0.9 * maxFreeDisk);
if( expectedCompactedFileSize < maxFreeDisk )
{
dataFileDirectory = dataDirectoryForTable[maxDiskIndex];
currentIndex = (maxDiskIndex + 1 )%dataDirectoryForTable.length ;
}
else
{
currentIndex = maxDiskIndex;
}
return dataFileDirectory;
}
public static AbstractType getComparator(String tableName, String cfName)
{
assert tableName != null;
CFMetaData cfmd = getCFMetaData(tableName, cfName);
if (cfmd == null)
throw new IllegalArgumentException("Unknown ColumnFamily " + cfName + " in keyspace " + tableName);
return cfmd.comparator;
}
public static AbstractType getSubComparator(String tableName, String cfName)
{
assert tableName != null;
return getCFMetaData(tableName, cfName).subcolumnComparator;
}
/**
* @return The absolute number of keys that should be cached per table.
*/
public static int getKeysCachedFor(String tableName, String columnFamilyName, long expectedKeys)
{
CFMetaData cfm = getCFMetaData(tableName, columnFamilyName);
double v = (cfm == null) ? CFMetaData.DEFAULT_KEY_CACHE_SIZE : cfm.getKeyCacheSize();
return (int)Math.min(FBUtilities.absoluteFromFraction(v, expectedKeys), Integer.MAX_VALUE);
}
/**
* @return The absolute number of rows that should be cached for the columnfamily.
*/
public static int getRowsCachedFor(String tableName, String columnFamilyName, long expectedRows)
{
CFMetaData cfm = getCFMetaData(tableName, columnFamilyName);
double v = (cfm == null) ? CFMetaData.DEFAULT_ROW_CACHE_SIZE : cfm.getRowCacheSize();
return (int)Math.min(FBUtilities.absoluteFromFraction(v, expectedRows), Integer.MAX_VALUE);
}
public static KSMetaData getTableDefinition(String table)
{
return tables.get(table);
}
// todo: this is wrong. the definitions need to be moved into their own class that can only be updated by the
// process of mutating an individual keyspace, rather than setting manually here.
public static void setTableDefinition(KSMetaData ksm, UUID newVersion)
{
if (ksm != null)
tables.put(ksm.name, ksm);
DatabaseDescriptor.defsVersion = newVersion;
}
public static void clearTableDefinition(KSMetaData ksm, UUID newVersion)
{
tables.remove(ksm.name);
DatabaseDescriptor.defsVersion = newVersion;
}
public static UUID getDefsVersion()
{
return defsVersion;
}
public static InetAddress getListenAddress()
{
return listenAddress;
}
public static InetAddress getRpcAddress()
{
return rpcAddress;
}
public static boolean getRpcKeepAlive()
{
return conf.rpc_keepalive;
}
public static Integer getRpcMinThreads()
{
return conf.rpc_min_threads;
}
public static Integer getRpcMaxThreads()
{
return conf.rpc_max_threads;
}
public static Integer getRpcSendBufferSize()
{
return conf.rpc_send_buff_size_in_bytes;
}
public static Integer getRpcRecvBufferSize()
{
return conf.rpc_recv_buff_size_in_bytes;
}
public static double getCommitLogSyncBatchWindow()
{
return conf.commitlog_sync_batch_window_in_ms;
}
public static int getCommitLogSyncPeriod() {
return conf.commitlog_sync_period_in_ms;
}
public static Config.CommitLogSync getCommitLogSync()
{
return conf.commitlog_sync;
}
public static Config.DiskAccessMode getDiskAccessMode()
{
return conf.disk_access_mode;
}
public static Config.DiskAccessMode getIndexAccessMode()
{
return indexAccessMode;
}
public static int getIndexedReadBufferSizeInKB()
{
return conf.column_index_size_in_kb;
}
public static int getSlicedReadBufferSizeInKB()
{
return conf.sliced_buffer_size_in_kb;
}
public static int getBMTThreshold()
{
return conf.binary_memtable_throughput_in_mb;
}
public static int getCompactionThreadPriority()
{
return conf.compaction_thread_priority;
}
public static boolean isSnapshotBeforeCompaction()
{
return conf.snapshot_before_compaction;
}
public static boolean isAutoBootstrap()
{
return conf.auto_bootstrap;
}
public static boolean hintedHandoffEnabled()
{
return conf.hinted_handoff_enabled;
}
public static int getMaxHintWindow()
{
return conf.max_hint_window_in_ms;
}
public static AbstractType getValueValidator(String keyspace, String cf, ByteBuffer column)
{
return getCFMetaData(keyspace, cf).getValueValidator(column);
}
public static CFMetaData getCFMetaData(Descriptor desc)
{
return getCFMetaData(desc.ksname, desc.cfname);
}
public static Integer getIndexInterval()
{
return conf.index_interval;
}
public static File getSerializedRowCachePath(String ksName, String cfName)
{
return new File(conf.saved_caches_directory + File.separator + ksName + "-" + cfName + "-RowCache");
}
public static File getSerializedKeyCachePath(String ksName, String cfName)
{
return new File(conf.saved_caches_directory + File.separator + ksName + "-" + cfName + "-KeyCache");
}
public static int getDynamicUpdateInterval()
{
return conf.dynamic_snitch_update_interval_in_ms;
}
public static void setDynamicUpdateInterval(Integer dynamicUpdateInterval)
{
conf.dynamic_snitch_update_interval_in_ms = dynamicUpdateInterval;
}
public static int getDynamicResetInterval()
{
return conf.dynamic_snitch_reset_interval_in_ms;
}
public static void setDynamicResetInterval(Integer dynamicResetInterval)
{
conf.dynamic_snitch_reset_interval_in_ms = dynamicResetInterval;
}
public static double getDynamicBadnessThreshold()
{
return conf.dynamic_snitch_badness_threshold;
}
public static void setDynamicBadnessThreshold(Double dynamicBadnessThreshold)
{
conf.dynamic_snitch_badness_threshold = dynamicBadnessThreshold;
}
public static double getFlushLargestMemtablesAt()
{
return conf.flush_largest_memtables_at;
}
public static double getReduceCacheSizesAt()
{
return conf.reduce_cache_sizes_at;
}
public static double getReduceCacheCapacityTo()
{
return conf.reduce_cache_capacity_to;
}
public static int getHintedHandoffThrottleDelay()
{
return conf.hinted_handoff_throttle_delay_in_ms;
}
public static boolean getPreheatKeyCache()
{
return conf.compaction_preheat_key_cache;
}
public static void validateMemtableThroughput(int sizeInMB) throws ConfigurationException
{
if (sizeInMB <= 0)
throw new ConfigurationException("memtable_throughput_in_mb must be greater than 0.");
}
public static void validateMemtableOperations(double operationsInMillions) throws ConfigurationException
{
if (operationsInMillions <= 0)
throw new ConfigurationException("memtable_operations_in_millions must be greater than 0.0.");
if (operationsInMillions > Long.MAX_VALUE / 1024 * 1024)
throw new ConfigurationException("memtable_operations_in_millions must be less than " + Long.MAX_VALUE / 1024 * 1024);
}
public static void validateMemtableFlushPeriod(int minutes) throws ConfigurationException
{
if (minutes <= 0)
throw new ConfigurationException("memtable_flush_after_mins must be greater than 0.");
}
public static boolean incrementalBackupsEnabled()
{
return conf.incremental_backups;
}
}