org.apache.catalina
Interface Host

All Superinterfaces:

Container

All Known Implementing Classes:

StandardHost

public interface Host

extends Container

A Host is a Container that represents a virtual host in the Catalina servlet engine. It is useful in the following types of scenarios:

• You wish to use Interceptors that see every single request processed by this particular virtual host.
• You wish to run Catalina in with a standalone HTTP connector, but still want support for multiple virtual hosts.

In general, you would not use a Host when deploying Catalina connected to a web server (such as Apache), because the Connector will have utilized the web server's facilities to determine which Context (or perhaps even which Wrapper) should be utilized to process this request.

The parent Container attached to a Host is generally an Engine, but may be some other implementation, or may be omitted if it is not necessary.

The child containers attached to a Host are generally implementations of Context (representing an individual servlet context).

Version:

$Id: Host.java 939531 2010-04-30 00:54:41Z kkolinko $

Author:

Craig R. McClanahan

Field Summary

static java.lang.String	ADD_ALIAS_EVENT The ContainerEvent event type sent when a new alias is added by addAlias().
static java.lang.String	REMOVE_ALIAS_EVENT The ContainerEvent event type sent when an old alias is removed by removeAlias().

Fields inherited from interface org.apache.catalina.Container

ADD_CHILD_EVENT, ADD_MAPPER_EVENT, ADD_VALVE_EVENT, REMOVE_CHILD_EVENT, REMOVE_MAPPER_EVENT, REMOVE_VALVE_EVENT

Method Summary

void	addAlias(java.lang.String alias) Add an alias name that should be mapped to this same Host.
java.lang.String[]	findAliases() Return the set of alias names for this Host.
java.lang.String	getAppBase() Return the application root for this Host.
boolean	getAutoDeploy() Return the value of the auto deploy flag.
java.lang.String	getConfigClass() Return the Java class name of the context configuration class for new web applications.
boolean	getDeployOnStartup() Return the value of the deploy on startup flag.
java.lang.String	getName() Return the canonical, fully qualified, name of the virtual host this Container represents.
boolean	getXmlNamespaceAware() Get the server.xml <host> attribute's xmlNamespaceAware.
boolean	getXmlValidation() Get the server.xml <host> attribute's xmlValidation.
Context	map(java.lang.String uri) Return the Context that would be used to process the specified host-relative request URI, if any; otherwise return null.
void	removeAlias(java.lang.String alias) Remove the specified alias name from the aliases for this Host.
void	setAppBase(java.lang.String appBase) Set the application root for this Host.
void	setAutoDeploy(boolean autoDeploy) Set the auto deploy flag value for this host.
void	setConfigClass(java.lang.String configClass) Set the Java class name of the context configuration class for new web applications.
void	setDeployOnStartup(boolean deployOnStartup) Set the deploy on startup flag value for this host.
void	setName(java.lang.String name) Set the canonical, fully qualified, name of the virtual host this Container represents.
void	setXmlNamespaceAware(boolean xmlNamespaceAware) Set the namespace aware feature of the XML parser used when parsing xml instances.
void	setXmlValidation(boolean xmlValidation) Set the validation feature of the XML parser used when parsing xml instances.

Methods inherited from interface org.apache.catalina.Container

addChild, addContainerListener, addPropertyChangeListener, backgroundProcess, findChild, findChildren, findContainerListeners, getBackgroundProcessorDelay, getCluster, getInfo, getLoader, getLogger, getManager, getMappingObject, getObjectName, getParent, getParentClassLoader, getPipeline, getRealm, getResources, invoke, removeChild, removeContainerListener, removePropertyChangeListener, setBackgroundProcessorDelay, setCluster, setLoader, setManager, setParent, setParentClassLoader, setRealm, setResources

Field Detail

ADD_ALIAS_EVENT

public static final java.lang.String ADD_ALIAS_EVENT

The ContainerEvent event type sent when a new alias is added by addAlias().

See Also:

Constant Field Values

REMOVE_ALIAS_EVENT

public static final java.lang.String REMOVE_ALIAS_EVENT

The ContainerEvent event type sent when an old alias is removed by removeAlias().

See Also:

Constant Field Values

Method Detail

getAppBase

public java.lang.String getAppBase()

Return the application root for this Host. This can be an absolute pathname, a relative pathname, or a URL.

setAppBase

public void setAppBase(java.lang.String appBase)

Set the application root for this Host. This can be an absolute pathname, a relative pathname, or a URL.

Parameters:

appBase - The new application root

getAutoDeploy

public boolean getAutoDeploy()

Return the value of the auto deploy flag. If true, it indicates that this host's child webapps should be discovred and automatically deployed dynamically.

setAutoDeploy

public void setAutoDeploy(boolean autoDeploy)

Set the auto deploy flag value for this host.

Parameters:

autoDeploy - The new auto deploy flag

getConfigClass

public java.lang.String getConfigClass()

Return the Java class name of the context configuration class for new web applications.

setConfigClass

public void setConfigClass(java.lang.String configClass)

Set the Java class name of the context configuration class for new web applications.

Parameters:

configClass - The new context configuration class

getDeployOnStartup

public boolean getDeployOnStartup()

Return the value of the deploy on startup flag. If true, it indicates that this host's child webapps should be discovred and automatically deployed.

setDeployOnStartup

public void setDeployOnStartup(boolean deployOnStartup)

Set the deploy on startup flag value for this host.

Parameters:

deployOnStartup - The new deploy on startup flag

getName

public java.lang.String getName()

Return the canonical, fully qualified, name of the virtual host this Container represents.

Specified by:

getName in interface Container

setName

public void setName(java.lang.String name)

Set the canonical, fully qualified, name of the virtual host this Container represents.

Specified by:

setName in interface Container

Parameters:

name - Virtual host name

Throws:

java.lang.IllegalArgumentException - if name is null

getXmlNamespaceAware

public boolean getXmlNamespaceAware()

Get the server.xml <host> attribute's xmlNamespaceAware.

Returns:

true if namespace awarenes is enabled.

getXmlValidation

public boolean getXmlValidation()

Get the server.xml <host> attribute's xmlValidation.

Returns:

true if validation is enabled.

setXmlValidation

public void setXmlValidation(boolean xmlValidation)

Set the validation feature of the XML parser used when parsing xml instances.

Parameters:

xmlValidation - true to enable xml instance validation

setXmlNamespaceAware

public void setXmlNamespaceAware(boolean xmlNamespaceAware)

Set the namespace aware feature of the XML parser used when parsing xml instances.

Parameters:

xmlNamespaceAware - true to enable namespace awareness

addAlias

public void addAlias(java.lang.String alias)

Add an alias name that should be mapped to this same Host.

Parameters:

alias - The alias to be added

findAliases

public java.lang.String[] findAliases()

Return the set of alias names for this Host. If none are defined, a zero length array is returned.

map

public Context map(java.lang.String uri)

Return the Context that would be used to process the specified host-relative request URI, if any; otherwise return null.

Parameters:

uri - Request URI to be mapped

removeAlias

public void removeAlias(java.lang.String alias)

Remove the specified alias name from the aliases for this Host.

Parameters:

alias - Alias name to be removed