weka.core.packageManagement

Class PackageManager

java.lang.Object

weka.core.packageManagement.PackageManager

Direct Known Subclasses:

DefaultPackageManager

public abstract class PackageManager
extends Object

Abstract base class for package managers. Contains methods to manage the location of the central package repository, the home directory for installing packages, the name and version of the base software system and a http proxy.

Version:

$Revision: 52568 $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

Constructor Summary

Constructors

Constructor and Description
PackageManager()

Method Summary

Modifier and Type	Method and Description
void	applySettings(Settings settings) Apply the supplied settings.
static PackageManager	create()
void	establishProxy() Tries to configure a Proxy object for use in an Authenticator if there is a proxy defined by the properties http.proxyHost and http.proxyPort, and if the user has set values for the properties (note, these are not standard java properties) http.proxyUser and http.proxyPassword.
abstract List<Dependency>	getAllDependenciesForPackage(Package target, Map<String,List<Dependency>> conflicts) Gets a full list of packages (encapsulated in Dependency objects) that are required by directly and indirectly by the named target package.
abstract List<Package>	getAllPackages(PrintStream... progress) Get all packages that the system knows about (i.e.
abstract List<Package>	getAvailablePackages() Get a list of packages that are not currently installed.
String	getBaseSystemName() Get the name of the main software system for which we manage packages.
Object	getBaseSystemVersion() Get the current installed version of the main system for which we manage packages.
Defaults	getDefaultSettings() Get the default settings of this package manager.
abstract Package	getInstalledPackageInfo(String packageName) Get package information on the named installed package.
abstract List<Package>	getInstalledPackages() Get a list of installed packages.
abstract Package	getPackageArchiveInfo(String packageArchivePath) Get package information from the supplied package archive file.
File	getPackageHome() Get the location (directory) of installed packages
URL	getPackageRepositoryURL() Get the URL to the repository of package meta data.
Proxy	getProxy() Get the proxy in use.
abstract Package	getRepositoryPackageInfo(String packageName) Get package information on the named package from the repository.
abstract Package	getRepositoryPackageInfo(String packageName, Object version) Get package information on the named package from the repository.
abstract byte[]	getRepositoryPackageMetaDataOnlyAsZip(PrintStream... progress) Gets an array of bytes containing a zip of all the repository meta data and supporting files.
abstract List<Object>	getRepositoryPackageVersions(String packageName) Get a list of available versions of the named package.
abstract Package	getURLPackageInfo(URL packageURL) Get package information on the package at the given URL.
abstract String	installPackageFromArchive(String packageArchivePath, PrintStream... progress) Install a package from an archive on the local file system.
abstract void	installPackageFromRepository(String packageName, Object version, PrintStream... progress) Install a package sourced from the repository.
abstract String	installPackageFromURL(URL packageURL, PrintStream... progress) Install a package sourced from a given URL.
abstract void	installPackages(List<Package> toInstall, PrintStream... progress) Installs all the packages in the supplied list.
void	setBaseSystemName(String baseS) Set the name of the main software system for which we manage packages.
void	setBaseSystemVersion(Object systemV) Set the current version of the base system for which we manage packages.
void	setPackageHome(File packageHome) Set the location (directory) of installed packages.
void	setPackageRepositoryURL(URL repositoryURL) Set the URL to the repository of package meta data.
void	setProxy(Proxy proxyToUse) Set a proxy to use for accessing the internet (default is no proxy).
boolean	setProxyAuthentication(URL urlToConnectTo) Sets an new default Authenticator that will return the values set through setProxyUsername() and setProxyPassword() (if applicable).
void	setProxyPassword(String proxyPassword) Set the password for authentication with the proxy.
void	setProxyUsername(String proxyUsername) Set the user name for authentication with the proxy.
abstract void	uninstallPackage(String packageName, PrintStream... progress) Uninstall a package.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PackageManager

public PackageManager()

Method Detail

create

public static PackageManager create()

establishProxy

public void establishProxy()

Tries to configure a Proxy object for use in an Authenticator if there is a proxy defined by the properties http.proxyHost and http.proxyPort, and if the user has set values for the properties (note, these are not standard java properties) http.proxyUser and http.proxyPassword.

setProxyAuthentication

public boolean setProxyAuthentication(URL urlToConnectTo)

Sets an new default Authenticator that will return the values set through setProxyUsername() and setProxyPassword() (if applicable).

Returns:

true if a proxy is to be used and (if applicable) the Authenticator was set successfully.

setPackageHome

public void setPackageHome(File packageHome)

Set the location (directory) of installed packages.

Parameters:

packageHome - the file system location of installed packages.

getPackageHome

public File getPackageHome()

Get the location (directory) of installed packages

Returns:

the directory containing installed packages.

setBaseSystemName

public void setBaseSystemName(String baseS)

Set the name of the main software system for which we manage packages.

Parameters:

baseS - the name of the base software system

getBaseSystemName

public String getBaseSystemName()

Get the name of the main software system for which we manage packages.

Returns:

the name of the base software system.

setBaseSystemVersion

public void setBaseSystemVersion(Object systemV)

Set the current version of the base system for which we manage packages.

Parameters:

systemV - the current version of the main software system.

getBaseSystemVersion

public Object getBaseSystemVersion()

Get the current installed version of the main system for which we manage packages.

Returns:

the installed version of the base system.

setPackageRepositoryURL

public void setPackageRepositoryURL(URL repositoryURL)

Set the URL to the repository of package meta data.

Parameters:

repositoryURL - the URL to the repository of package meta data.

getPackageRepositoryURL

public URL getPackageRepositoryURL()

Get the URL to the repository of package meta data.

Returns:

the URL to the repository of package meta data.

setProxy

public void setProxy(Proxy proxyToUse)

Set a proxy to use for accessing the internet (default is no proxy).

Parameters:

proxyToUse - a proxy to use.

getProxy

public Proxy getProxy()

Get the proxy in use.

Returns:

the proxy in use or null if no proxy is being used.

setProxyUsername

public void setProxyUsername(String proxyUsername)

Set the user name for authentication with the proxy.

Parameters:

proxyUsername - the user name to use for proxy authentication.

setProxyPassword

public void setProxyPassword(String proxyPassword)

Set the password for authentication with the proxy.

Parameters:

proxyPassword - the password to use for proxy authentication.

getDefaultSettings

public Defaults getDefaultSettings()

Get the default settings of this package manager. Default implementation returns null. Subclasses to override if they have default settings

Returns:

the default settings of this package manager

applySettings

public void applySettings(Settings settings)

Apply the supplied settings. Default implementation does nothing. Subclasses should override to take note of settings changes.

Parameters:

settings - the settings to apply

getRepositoryPackageMetaDataOnlyAsZip

public abstract byte[] getRepositoryPackageMetaDataOnlyAsZip(PrintStream... progress)
                                                      throws Exception

Gets an array of bytes containing a zip of all the repository meta data and supporting files. Does *not* contain any package archives etc., only a snapshot of the meta data. Could be used by clients to establish a cache of meta data.

Parameters:

progress - optional varargs parameter, that, if supplied, is expected to contain one or more PrintStream objects to write progress to.

Returns:

a zip compressed array of bytes.

Throws:

Exception - if the repository meta data can't be returned as a zip

getPackageArchiveInfo

public abstract Package getPackageArchiveInfo(String packageArchivePath)
                                       throws Exception

Get package information from the supplied package archive file.

Parameters:

packageArchivePath - the path to the package archive file

Returns:

a Package object encapsulating the package meta data.

Throws:

Exception - if the package meta data can't be retrieved.

getInstalledPackageInfo

public abstract Package getInstalledPackageInfo(String packageName)
                                         throws Exception

Get package information on the named installed package.

Parameters:

packageName - the name of the package to get information about.

Returns:

a Package object encapsulating the package meta data or null if the package is not installed.

Throws:

Exception - if the package meta data can't be retrieved.

getRepositoryPackageInfo

public abstract Package getRepositoryPackageInfo(String packageName)
                                          throws Exception

Get package information on the named package from the repository. If multiple versions of the package are available, it assumes that the most recent is required.

Parameters:

packageName - the name of the package to get information about.

Returns:

a Package object encapsulating the package meta data.

Throws:

Exception - if the package meta data can't be retrieved.

getRepositoryPackageInfo

public abstract Package getRepositoryPackageInfo(String packageName,
                                                 Object version)
                                          throws Exception

Get package information on the named package from the repository.

Parameters:

packageName - the name of the package to get information about.

version - the version of the package to retrieve (may be null if not applicable).

Returns:

a Package object encapsulating the package meta data.

Throws:

Exception - if the package meta data can't be retrieved.

getRepositoryPackageVersions

public abstract List<Object> getRepositoryPackageVersions(String packageName)
                                                   throws Exception

Get a list of available versions of the named package.

Parameters:

packageName - the name of the package to get versions.

Returns:

a list of available versions (or null if not applicable)

Throws:

Exception - if something goes wrong while trying to retrieve the list of versions.

getURLPackageInfo

public abstract Package getURLPackageInfo(URL packageURL)
                                   throws Exception

Get package information on the package at the given URL.

Parameters:

packageURL - the URL to the package.

Returns:

a Package object encapsulating the package meta data

Throws:

Exception - if the package meta data can't be retrieved.

installPackageFromArchive

public abstract String installPackageFromArchive(String packageArchivePath,
                                                 PrintStream... progress)
                                          throws Exception

Install a package from an archive on the local file system.

Parameters:

packageArchivePath - the path to the package archive file.

progress - optional varargs parameter, that, if supplied, is expected to contain one or more PrintStream objects to write progress to.

Returns:

the name of the package installed

Throws:

Exception - if the package can't be installed for some reason.

installPackageFromRepository

public abstract void installPackageFromRepository(String packageName,
                                                  Object version,
                                                  PrintStream... progress)
                                           throws Exception

Install a package sourced from the repository.

Parameters:

packageName - the name of the package to install

version - the version of the package to install (may be null if not applicable).

progress - optional varargs parameter, that, if supplied, is expected to contain one or more PrintStream objects to write progress to.

Throws:

Exception - if the package can't be installed for some reason.

installPackageFromURL

public abstract String installPackageFromURL(URL packageURL,
                                             PrintStream... progress)
                                      throws Exception

Install a package sourced from a given URL.

Parameters:

packageURL - the URL to the package.

progress - optional varargs parameter, that, if supplied, is expected to contain one or more PrintStream objects to write progress to.

Returns:

the name of the package installed

Throws:

Exception - if the package can't be installed for some reason.

installPackages

public abstract void installPackages(List<Package> toInstall,
                                     PrintStream... progress)
                              throws Exception

Installs all the packages in the supplied list.

Parameters:

toInstall - a list of Packages to install.

progress - optional varargs parameter, that, if supplied, is expected to contain one or more PrintStream objects to write progress to.

Throws:

Exception - if something goes wrong during the installation process.

uninstallPackage

public abstract void uninstallPackage(String packageName,
                                      PrintStream... progress)
                               throws Exception

Uninstall a package.

Parameters:

packageName - the package to uninstall.

progress - optional varargs parameter, that, if supplied, is expected to contain one or more PrintStream objects to write progress to.

Throws:

Exception - if the named package could not be removed for some reason.

getInstalledPackages

public abstract List<Package> getInstalledPackages()
                                            throws Exception

Get a list of installed packages.

Returns:

a list of installed packages.

Throws:

Exception - if a list of packages can't be determined.

getAllPackages

public abstract List<Package> getAllPackages(PrintStream... progress)
                                      throws Exception

Get all packages that the system knows about (i.e. all packages contained in the repository).

Parameters:

progress - optional varargs parameter, that, if supplied is expected to contain one or more PrintStream objects to write progress to.

Returns:

a list of all packages.

Throws:

Exception - if a list of packages can't be determined.

getAvailablePackages

public abstract List<Package> getAvailablePackages()
                                            throws Exception

Get a list of packages that are not currently installed.

Returns:

a list of packages that are not currently installed.

Throws:

Exception - if a list of packages can't be determined.

getAllDependenciesForPackage

public abstract List<Dependency> getAllDependenciesForPackage(Package target,
                                                              Map<String,List<Dependency>> conflicts)
                                                       throws Exception

Gets a full list of packages (encapsulated in Dependency objects) that are required by directly and indirectly by the named target package. Also builds a Map of any packages that are required by more than one package and where there is a conflict of some sort (e.g. multiple conflicting versions). The keys of this map are package names (strings), and each associated value is a list of Dependency objects.

Parameters:

target - the package for which a list of dependencies is required.

conflicts - will hold any conflicts that are discovered while building the full dependency list.

Returns:

a list of packages that are directly and indirectly required by the named target package.

Throws:

Exception - if a problem occurs while building the dependency list.