org.terrier.utility
Class ApplicationSetup

java.lang.Object
  extended by org.terrier.utility.ApplicationSetup

public class ApplicationSetup
extends java.lang.Object

This class retrieves and provides access to all the constants and parameters for the system. When it is statically initialised, it loads the properties file specified by the system property terrier.setup. If this is not specified, then the default value is the value of the terrier.home system property, appended by etc/terrier.properties.
eg java -Dterrier.home=$TERRIER_HOME -Dterrier.setup=$TERRIER_HOME/etc/terrier.properties TrecTerrier

System Properties used:

terrier.setupSpecifies where the terrier.properties file can be found.
terrier.homeSpecified where Terrier has been installed, if the terrier.properties file cannot be found, or the terrier.properties file does not specify the terrier.home in it.
NB:In the future, this may further default to $TERRIER_HOME from the environment.
file.separatorWhat separates directory names in this platform. Set automatically by Java
line.separatorWhat separates lines in a file on this platform. Set automatically by Java

In essence, for Terrier to function properly, you need to specify one of the following on the command line:

Any property defined in the properties file can be overridden as follows:

Author:
Gianni Amati, Vassilis Plachouras, Ben He, Craig Macdonald

Nested Class Summary
static interface ApplicationSetup.TerrierApplicationPlugin
          Interface for plugins.
 
Field Summary
protected static java.util.Properties appProperties
          The properties object in which the properties from the file are read.
static boolean BLOCK_INDEXING
          Specifies whether block information will be used for indexing.
static int BLOCK_SIZE
          The size of a block of terms in a document.
static java.lang.String COLLECTION_SPEC
          The name of the file that contains the list of resources to be processed during indexing.
static java.lang.String DEFAULT_LOG4J_CONFIG
          Default log4j config Terrier loads if no TERRIER_ETC/terrier-log.xml file exists
static int DOCS_CHECK_SINGLEPASS
          Number of documents between each memory check in the single pass inversion method.
static java.lang.String EOL
          The new line character used by the operating system.
static int EXPANSION_DOCUMENTS
          The number of top ranked documents considered for expanding the query.
static java.lang.String EXPANSION_MODELS
          Deprecated. As of Terrier 3.5 The name of the file which contains the query expansion methods used. The corresponding property is expansion.models and the default value is qemodels. If a relative path is given, it is prefixed with TERRIER_ETC.
static int EXPANSION_TERMS
          The number of terms added to the original query.
static boolean FIELD_QUERYING
          Specifies whether fields will be used for querying.
static java.lang.String FILE_SEPARATOR
          The file separator used by the operating system.
static boolean IGNORE_EMPTY_DOCUMENTS
          Ignore or not empty documents.
protected static java.util.List<ApplicationSetup.TerrierApplicationPlugin> loadedPlugins
          list of loaded plugins
static java.lang.String LOG4J_CONFIG
          The configuration file used by log4j
static int MAX_BLOCKS
          The maximum number of blocks in a document.
static int MAX_TERM_LENGTH
          The maximum size of a term.
static int MEMORY_THRESHOLD_SINGLEPASS
          Memory threshold in the single pass inversion method.
static java.lang.String TERRIER_ETC
          The directory under which the configuration files of Terrier are stored.
static java.lang.String TERRIER_HOME
          The directory under which the application is installed.
static java.lang.String TERRIER_INDEX_PATH
          The name of the directory where the inverted file and other data structures are stored.
static java.lang.String TERRIER_INDEX_PREFIX
          The prefix of the data structures' filenames.
static java.lang.String TERRIER_SHARE
          The name of the directory where installation independent read-only data is stored.
static java.lang.String TERRIER_VAR
          The name of the directory where the data structures and the output of Terrier are stored.
static java.lang.String TERRIER_VERSION
          Current Terrier version
static java.lang.String TREC_MODELS
          Deprecated. As of Terrier 3.5 The filename of the file that contains the weighting models to be used. The corresponding property is trec.models and the default value is trec.models. If a relative path is given, then it is prefixed with TERRIER_ETC.
static java.lang.String TREC_QRELS
          Deprecated. As of Terrier 3.5 The name of the file that contains a list of qrels files to be used for evaluation. The corresponding property is trec.qrels and its default value is trec.qrels. If a relative path is given, TERRIER_ETC will be prefixed.
static java.lang.String TREC_RESULTS
          The name of the directory where the results are stored.
static java.lang.String TREC_RESULTS_SUFFIX
          The suffix of the files, where the results are stored.
static java.lang.String TREC_TOPICS_LIST
          Deprecated. As of Terrier 3.5 The name of the file that contains a list of files where queries are stored. The corresponding property is trec.topics.list and the default value is trec.topics.list. If a relative path is given, TERRIER_ETC will be prefixed.
protected static java.util.Properties UsedAppProperties
           
 
Constructor Summary
ApplicationSetup()
           
 
Method Summary
static void bootstrapInitialisation()
          forces ApplicatinSetup initilisation
static void clearAllProperties()
          Clears ApplicationSetup of all properties
static void configure(java.io.InputStream propertiesStream)
          Loads the common Terrier properties from the specified InputStream
 ApplicationSetup.TerrierApplicationPlugin getPlugin(java.lang.String name)
          Return a loaded plugin by name.
static java.util.Properties getProperties()
          Returns the underlying properties object for ApplicationSetup
static java.lang.String getProperty(java.lang.String propertyKey, java.lang.String defaultValue)
          Returns the value for the specified property, given a default value, in case the property was not defined during the initialization of the system.
static java.util.Properties getUsedProperties()
          Returns a properties object detailing all the properties fetched during the lifetime of this class.
static void loadCommonProperties()
          Loads the ApplicationSetup variables, e.g.
static java.lang.String makeAbsolute(java.lang.String filename, java.lang.String DefaultPath)
          Checks whether the given filename is absolute and if not, it adds on the default path to make it absolute.
static void setDefaultProperty(java.lang.String propertyKey, java.lang.String defaultValue)
          set a property value only if it has not already been set
static void setProperty(java.lang.String propertyKey, java.lang.String value)
          Sets a value for the specified property.
static void setupFilenames()
          Deprecated.  
protected static void setupPlugins()
          Calls the initialise method of any plugins named in terrier.plugins
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

TERRIER_VERSION

public static final java.lang.String TERRIER_VERSION
Current Terrier version

See Also:
Constant Field Values

DEFAULT_LOG4J_CONFIG

public static final java.lang.String DEFAULT_LOG4J_CONFIG
Default log4j config Terrier loads if no TERRIER_ETC/terrier-log.xml file exists

Since:
1.1.0
See Also:
Constant Field Values

appProperties

protected static final java.util.Properties appProperties
The properties object in which the properties from the file are read.


UsedAppProperties

protected static final java.util.Properties UsedAppProperties

FILE_SEPARATOR

public static java.lang.String FILE_SEPARATOR
The file separator used by the operating system. Defaults to the system property file.separator.


EOL

public static java.lang.String EOL
The new line character used by the operating system. Defaults to the system property line.separator.


TERRIER_HOME

public static java.lang.String TERRIER_HOME
The directory under which the application is installed. It corresponds to the property terrier.home and it should be set in the properties file, or as a property on the command line.


TERRIER_ETC

public static java.lang.String TERRIER_ETC
The directory under which the configuration files of Terrier are stored. The corresponding property is terrier.etc and it should be set in the properties file. If a relative path is given, TERRIER_HOME will be prefixed.


TERRIER_SHARE

public static java.lang.String TERRIER_SHARE
The name of the directory where installation independent read-only data is stored. Files like stopword lists, and example and testing data are examples. The corresponding property is terrier.share and its default value is share. If a relative path is given, then TERRIER_HOME will be prefixed.


TERRIER_VAR

public static java.lang.String TERRIER_VAR
The name of the directory where the data structures and the output of Terrier are stored. The corresponding property is terrier.var and its default value is var. If a relative path is given, TERRIER_HOME will be prefixed.


TERRIER_INDEX_PATH

public static java.lang.String TERRIER_INDEX_PATH
The name of the directory where the inverted file and other data structures are stored. The default value is InvFileCollection but it can be overridden with the property terrier.index.path. If a relative path is given, TERRIER_VAR will be prefixed.


COLLECTION_SPEC

public static java.lang.String COLLECTION_SPEC
The name of the file that contains the list of resources to be processed during indexing. The contents of this file are collection implementation dependent. For example, for a TREC collection, this file must contain the list of files to index. The corresponding property is collection.spec and by default its value is collection.spec. If a relative path is given, TERRIER_ETC will be prefixed.


TREC_RESULTS

public static java.lang.String TREC_RESULTS
The name of the directory where the results are stored. The corresponding property is trec.results and the default value is results. If a relative path is given, TERRIER_VAR will be prefixed.


TREC_TOPICS_LIST

public static java.lang.String TREC_TOPICS_LIST
Deprecated. As of Terrier 3.5 The name of the file that contains a list of files where queries are stored. The corresponding property is trec.topics.list and the default value is trec.topics.list. If a relative path is given, TERRIER_ETC will be prefixed.

TREC_QRELS

public static java.lang.String TREC_QRELS
Deprecated. As of Terrier 3.5 The name of the file that contains a list of qrels files to be used for evaluation. The corresponding property is trec.qrels and its default value is trec.qrels. If a relative path is given, TERRIER_ETC will be prefixed.

TREC_RESULTS_SUFFIX

public static java.lang.String TREC_RESULTS_SUFFIX
The suffix of the files, where the results are stored. It corresponds to the property trec.results.suffix and the default value is .res.


TREC_MODELS

public static java.lang.String TREC_MODELS
Deprecated. As of Terrier 3.5 The filename of the file that contains the weighting models to be used. The corresponding property is trec.models and the default value is trec.models. If a relative path is given, then it is prefixed with TERRIER_ETC.

MAX_TERM_LENGTH

public static int MAX_TERM_LENGTH
The maximum size of a term. It corresponds to the the property max.term.length, and the default value is 20.

Since:
1.1.0

IGNORE_EMPTY_DOCUMENTS

public static boolean IGNORE_EMPTY_DOCUMENTS
Ignore or not empty documents. That is, if it is true, then a document that does not contain any terms will have a corresponding entry in the .docid file and the total number of documents in the statistics will be the total number of documents in the collection, even if some of them are empty. It corresponds to the property ignore.empty.documents and the default value is false.


TERRIER_INDEX_PREFIX

public static java.lang.String TERRIER_INDEX_PREFIX
The prefix of the data structures' filenames. It corresponds to the property terrier.index.prefix and the default value is data.


EXPANSION_TERMS

public static int EXPANSION_TERMS
The number of terms added to the original query. The corresponding property is expansion.terms and the default value is 10.


EXPANSION_DOCUMENTS

public static int EXPANSION_DOCUMENTS
The number of top ranked documents considered for expanding the query. The corresponding property is expansion.documents and the default value is 3.


EXPANSION_MODELS

public static java.lang.String EXPANSION_MODELS
Deprecated. As of Terrier 3.5 The name of the file which contains the query expansion methods used. The corresponding property is expansion.models and the default value is qemodels. If a relative path is given, it is prefixed with TERRIER_ETC.

BLOCK_SIZE

public static int BLOCK_SIZE
The size of a block of terms in a document. The corresponding property is blocks.size and the default value is 1.


MAX_BLOCKS

public static int MAX_BLOCKS
The maximum number of blocks in a document. The corresponding property is blocks.max and the default value is 100000.


BLOCK_INDEXING

public static boolean BLOCK_INDEXING
Specifies whether block information will be used for indexing. The corresponding property is block.indexing and the default value is false. The value of this property cannot be modified after the index of a collection has been built.


FIELD_QUERYING

public static boolean FIELD_QUERYING
Specifies whether fields will be used for querying. The corresponding property is field.querying and the default value is false.


MEMORY_THRESHOLD_SINGLEPASS

public static int MEMORY_THRESHOLD_SINGLEPASS
Memory threshold in the single pass inversion method. If a memory check is below this value, the postings in memory are written to disk. Default is 50 000 000 (50MB) and 100 000 000 (100MB) for 32bit and 64bit JVMs respectively, and can be configured using the property memory.reserved.


DOCS_CHECK_SINGLEPASS

public static int DOCS_CHECK_SINGLEPASS
Number of documents between each memory check in the single pass inversion method. The default value is 20, and this can be configured using the property docs.check.


LOG4J_CONFIG

public static java.lang.String LOG4J_CONFIG
The configuration file used by log4j


loadedPlugins

protected static java.util.List<ApplicationSetup.TerrierApplicationPlugin> loadedPlugins
list of loaded plugins

Constructor Detail

ApplicationSetup

public ApplicationSetup()
Method Detail

bootstrapInitialisation

public static void bootstrapInitialisation()
forces ApplicatinSetup initilisation


loadCommonProperties

public static void loadCommonProperties()
Loads the ApplicationSetup variables, e.g. ApplicationSetup.TERRIER_HOME


configure

public static void configure(java.io.InputStream propertiesStream)
                      throws java.io.IOException
Loads the common Terrier properties from the specified InputStream

Throws:
java.io.IOException

getProperty

public static java.lang.String getProperty(java.lang.String propertyKey,
                                           java.lang.String defaultValue)
Returns the value for the specified property, given a default value, in case the property was not defined during the initialization of the system. The property values are read from the properties file. If the value of the property terrier.usecontext is true, then the properties file is overridden by the context. If the value of the property terrier.usecontext is false, then the properties file is overridden

Parameters:
propertyKey - The property to be returned
defaultValue - The default value used, in case it is not defined
Returns:
the value for the given property.

getUsedProperties

public static java.util.Properties getUsedProperties()
Returns a properties object detailing all the properties fetched during the lifetime of this class. It is of note that this is NOT the underlying appProperties table, as to update that would mean that properties fetched using their defaults, could not have different defaults in different places.


getProperties

public static java.util.Properties getProperties()
Returns the underlying properties object for ApplicationSetup


setProperty

public static void setProperty(java.lang.String propertyKey,
                               java.lang.String value)
Sets a value for the specified property. The properties set with this method are not saved in the properties file.

Parameters:
propertyKey - the name of the property to set.
value - the value of the property to set.

setDefaultProperty

public static void setDefaultProperty(java.lang.String propertyKey,
                                      java.lang.String defaultValue)
set a property value only if it has not already been set

Parameters:
propertyKey - the name of the property to set.
defaultValue - the value of the property to set.

setupFilenames

public static void setupFilenames()
Deprecated. 

Sets up the names of the inverted file, the direct file, the document index file and the lexicon file.


setupPlugins

protected static void setupPlugins()
Calls the initialise method of any plugins named in terrier.plugins


getPlugin

public ApplicationSetup.TerrierApplicationPlugin getPlugin(java.lang.String name)
Return a loaded plugin by name. Returns null if a plugin of that name has not been loaded


makeAbsolute

public static java.lang.String makeAbsolute(java.lang.String filename,
                                            java.lang.String DefaultPath)
Checks whether the given filename is absolute and if not, it adds on the default path to make it absolute. If a URI scheme is present, the filename is assumed to be absolute

Parameters:
filename - String the filename to make absolute
DefaultPath - String the prefix to add
Returns:
the absolute filename

clearAllProperties

public static void clearAllProperties()
Clears ApplicationSetup of all properties



Terrier 3.5. Copyright © 2004-2011 University of Glasgow