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## org.apache.catalina.core
Class StandardHost

    java.lang.Object
      org.apache.catalina.core.ContainerBase
          org.apache.catalina.core.StandardHost

All Implemented Interfaces:
  java.io.Serializable, javax.management.MBeanRegistration, Container, Host, Lifecycle, Pipeline

    public class StandardHost

extends ContainerBase
implements Host

Standard implementation of the Host interface. Each child container must be a Context implementation to process the requests directed to a particular web application.

Author:
  Craig R. McClanahan, Remy Maucherat
See Also:
  Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.catalina.core.ContainerBase
`ContainerBase.ContainerBackgroundProcessor, ContainerBase.NoopAccessLog, ContainerBase.PrivilegedAddChild`

Field Summary

Fields inherited from class org.apache.catalina.core.ContainerBase
`accessLog, backgroundProcessorDelay, children, cluster, controller, domain, lifecycle, listeners, loader, logger, logName, manager, mserver, name, oname, parent, parentClassLoader, pipeline, realm, resources, sm, startChildren, started, suffix, support, type`

Fields inherited from interface org.apache.catalina.Host
`ADD_ALIAS_EVENT, REMOVE_ALIAS_EVENT`

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`

Fields inherited from interface org.apache.catalina.Lifecycle
`AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, DESTROY_EVENT, INIT_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT`

Constructor Summary
`StandardHost()` Create a new StandardHost component with the default basic Valve.

Method Summary
`void` | `addAlias(java.lang.String alias)` Add an alias name that should be mapped to this same Host.
`void` | `addChild(Container child)` Add a child Container, only if the proposed child is an implementation of Context.
`javax.management.ObjectName` | `createObjectName(java.lang.String domain, javax.management.ObjectName parent)`
`void` | `destroy()`
`java.lang.String[]` | `findAliases()` Return the set of alias names for this Host.
`java.lang.String[]` | `findReloadedContextMemoryLeaks()` Attempt to identify the contexts that have a class loader memory leak.
`java.lang.String[]` | `getAliases()`
`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.
`java.lang.String` | `getContextClass()` Return the Java class name of the Context implementation class for new web applications.
`java.lang.String` | `getDeployIgnore()` Return the regular expression that defines the files and directories in the host's `appBase` that will be ignored by the automatic deployment process.
`java.util.regex.Pattern` | `getDeployIgnorePattern()` Return the compiled regular expression that defines the files and directories in the host's `appBase` that will be ignored by the automatic deployment process.
`boolean` | `getDeployOnStartup()` Return the value of the deploy on startup flag.
`java.lang.String` | `getErrorReportValveClass()` Return the Java class name of the error report valve class for new web applications.
`java.lang.String` | `getInfo()` Return descriptive information about this Container implementation and the corresponding version number, in the format `<description>/<version>`.
`boolean` | `getLiveDeploy()` Return the value of the live deploy flag.
`java.lang.String` | `getName()` Return the canonical, fully qualified, name of the virtual host this Container represents.
`java.lang.String[]` | `getValveNames()` Return the MBean Names of the Valves assoicated with this Host
`java.lang.String` | `getWorkDir()` Host work directory base.
`boolean` | `getXmlNamespaceAware()` Will the parsing of the web.xml file for Contexts of this Host be performed by a namespace aware parser?
`boolean` | `getXmlValidation()` Will the parsing of the web.xml file and *.tld files for Contexts of this Host be performed by a validating parser?
`void` | `init()` Init method, part of the MBean lifecycle.
`boolean` | `isDeployXML()` Deploy XML Context config files flag accessor.
`boolean` | `isUnpackWARs()` Unpack WARs flag accessor.
`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`.
`javax.management.ObjectName` | `preRegister(javax.management.MBeanServer server, javax.management.ObjectName oname)`
`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` | `setContextClass(java.lang.String contextClass)` Set the Java class name of the Context implementation class for new web applications.
`void` | `setDeployIgnore(java.lang.String deployIgnore)` Set the regular expression that defines the files and directories in the host's `appBase` that will be ignored by the automatic deployment process.
`void` | `setDeployOnStartup(boolean deployOnStartup)` Set the deploy on startup flag value for this host.
`void` | `setDeployXML(boolean deployXML)` Deploy XML Context config files flag mutator.
`void` | `setErrorReportValveClass(java.lang.String errorReportValveClass)` Set the Java class name of the error report valve class for new web applications.
`void` | `setLiveDeploy(boolean liveDeploy)` Set the live deploy 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` | `setUnpackWARs(boolean unpackWARs)` Unpack WARs flag mutator.
`void` | `setWorkDir(java.lang.String workDir)` Host work directory base.
`void` | `setXmlNamespaceAware(boolean xmlNamespaceAware)` Controls whether the parsing of the web.xml file for Contexts of this Host will be performed by a namespace aware parser.
`void` | `setXmlValidation(boolean xmlValidation)` Controls whether the parsing of the web.xml file and *.tld files for Contexts of this Host will be performed by a validating parser.
`void` | `start()` Start this host.
`java.lang.String` | `toString()` Return a String representation of this component.

Methods inherited from class org.apache.catalina.core.ContainerBase
`addContainerListener, addLifecycleListener, addPropertyChangeListener, addValve, backgroundProcess, findChild, findChildren, findContainerListeners, findLifecycleListeners, fireContainerEvent, getAccessLog, getBackgroundProcessorDelay, getBasic, getChildren, getCluster, getContainerSuffix, getDomain, getFirst, getJmxName, getJSR77Suffix, getLoader, getLogger, getManager, getMappingObject, getObjectName, getParent, getParentClassLoader, getParentName, getPipeline, getRealm, getResources, getStartChildren, getType, getValveObjectNames, getValves, invoke, logAccess, logName, postDeregister, postRegister, preDeregister, removeChild, removeContainerListener, removeLifecycleListener, removePropertyChangeListener, removeValve, setBackgroundProcessorDelay, setBasic, setCluster, setDomain, setLoader, setManager, setParent, setParentClassLoader, setRealm, setResources, setStartChildren, stop, threadStart, threadStop`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface org.apache.catalina.Container
`addContainerListener, addPropertyChangeListener, backgroundProcess, findChild, findChildren, findContainerListeners, getAccessLog, getBackgroundProcessorDelay, getCluster, getLoader, getLogger, getManager, getMappingObject, getObjectName, getParent, getParentClassLoader, getPipeline, getRealm, getResources, invoke, logAccess, removeChild, removeContainerListener, removePropertyChangeListener, setBackgroundProcessorDelay, setCluster, setLoader, setManager, setParent, setParentClassLoader, setRealm, setResources`

Constructor Detail

### StandardHost

    public StandardHost()

  Create a new StandardHost component with the default basic Valve.

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.

  Specified by:
    `getAppBase` in interface `Host`

### 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.

  Specified by:
    `setAppBase` in interface `Host`
  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 will be dynamically deployed.

  Specified by:
    `getAutoDeploy` in interface `Host`

### setAutoDeploy

    public void setAutoDeploy(boolean autoDeploy)

  Set the auto deploy flag value for this host.

  Specified by:
    `setAutoDeploy` in interface `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.

  Specified by:
    `getConfigClass` in interface `Host`

### setConfigClass

    public void setConfigClass(java.lang.String configClass)

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

  Specified by:
    `setConfigClass` in interface `Host`
  Parameters:
    `configClass` - The new context configuration class

### getContextClass

    public java.lang.String getContextClass()

  Return the Java class name of the Context implementation class for new web applications.

### setContextClass

    public void setContextClass(java.lang.String contextClass)

  Set the Java class name of the Context implementation class for new web applications.

  Parameters:
    `contextClass` - The new context implementation 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 at startup time.

  Specified by:
    `getDeployOnStartup` in interface `Host`

### setDeployOnStartup

    public void setDeployOnStartup(boolean deployOnStartup)

  Set the deploy on startup flag value for this host.

  Specified by:
    `setDeployOnStartup` in interface `Host`
  Parameters:
    `deployOnStartup` - The new deploy on startup flag

### isDeployXML

    public boolean isDeployXML()

  Deploy XML Context config files flag accessor.

### setDeployXML

    public void setDeployXML(boolean deployXML)

  Deploy XML Context config files flag mutator.

### getLiveDeploy

    public boolean getLiveDeploy()

  Return the value of the live deploy flag. If true, it indicates that a background thread should be started that looks for web application context files, WAR files, or unpacked directories being dropped in to the `appBase` directory, and deploys new ones as they are encountered.

### setLiveDeploy

    public void setLiveDeploy(boolean liveDeploy)

  Set the live deploy flag value for this host.

  Parameters:
    `liveDeploy` - The new live deploy flag

### getErrorReportValveClass

    public java.lang.String getErrorReportValveClass()

  Return the Java class name of the error report valve class for new web applications.

### setErrorReportValveClass

    public void setErrorReportValveClass(java.lang.String errorReportValveClass)

  Set the Java class name of the error report valve class for new web applications.

  Parameters:
    `errorReportValveClass` - The new error report valve class

### 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`
  Specified by:
    `getName` in interface `Host`
  Overrides:
    `getName` in class `ContainerBase`

### 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`
  Specified by:
    `setName` in interface `Host`
  Overrides:
    `setName` in class `ContainerBase`
  Parameters:
    `name` - Virtual host name
  Throws:
    `java.lang.IllegalArgumentException` - if name is null

### isUnpackWARs

    public boolean isUnpackWARs()

  Unpack WARs flag accessor.

### setUnpackWARs

    public void setUnpackWARs(boolean unpackWARs)

  Unpack WARs flag mutator.

### setXmlValidation

    public void setXmlValidation(boolean xmlValidation)

  Description copied from interface: `Host`
  Controls whether the parsing of the web.xml file and *.tld files for Contexts of this Host will be performed by a validating parser. If `false` it may still be enabled per Context using `Context.setXmlValidation(boolean)`.

  Specified by:
    `setXmlValidation` in interface `Host`
  Parameters:
    `xmlValidation` - true to enable xml validation

### getXmlValidation

    public boolean getXmlValidation()

  Description copied from interface: `Host`
  Will the parsing of the web.xml file and *.tld files for Contexts of this Host be performed by a validating parser? If `false` it may still be enabled per Context using `Context.setXmlValidation(boolean)`.

  Specified by:
    `getXmlValidation` in interface `Host`
  Returns:
    true if validation is enabled.

### getXmlNamespaceAware

    public boolean getXmlNamespaceAware()

  Description copied from interface: `Host`
  Will the parsing of the web.xml file for Contexts of this Host be performed by a namespace aware parser? If `false` it may still be enabled per Context using `Context.setXmlNamespaceAware(boolean)`.

  Specified by:
    `getXmlNamespaceAware` in interface `Host`
  Returns:
    true if namespace awareness is enabled.

### setXmlNamespaceAware

    public void setXmlNamespaceAware(boolean xmlNamespaceAware)

  Description copied from interface: `Host`
  Controls whether the parsing of the web.xml file for Contexts of this Host will be performed by a namespace aware parser. If `false` it may still be enabled per Context using `Context.setXmlNamespaceAware(boolean)`.

  Specified by:
    `setXmlNamespaceAware` in interface `Host`
  Parameters:
    `xmlNamespaceAware` - true to enable namespace awareness

### getWorkDir

    public java.lang.String getWorkDir()

  Host work directory base.

### setWorkDir

    public void setWorkDir(java.lang.String workDir)

  Host work directory base.

### getDeployIgnore

    public java.lang.String getDeployIgnore()

  Return the regular expression that defines the files and directories in the host's `appBase` that will be ignored by the automatic deployment process.

  Specified by:
    `getDeployIgnore` in interface `Host`

### getDeployIgnorePattern

    public java.util.regex.Pattern getDeployIgnorePattern()

  Return the compiled regular expression that defines the files and directories in the host's `appBase` that will be ignored by the automatic deployment process.

  Specified by:
    `getDeployIgnorePattern` in interface `Host`

### setDeployIgnore

    public void setDeployIgnore(java.lang.String deployIgnore)

  Set the regular expression that defines the files and directories in the host's `appBase` that will be ignored by the automatic deployment process.

  Specified by:
    `setDeployIgnore` in interface `Host`

### addAlias

    public void addAlias(java.lang.String alias)

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

  Specified by:
    `addAlias` in interface `Host`
  Parameters:
    `alias` - The alias to be added

### addChild

    public void addChild(Container child)

  Add a child Container, only if the proposed child is an implementation of Context.

  Specified by:
    `addChild` in interface `Container`
  Overrides:
    `addChild` in class `ContainerBase`
  Parameters:
    `child` - Child container to be added

### findReloadedContextMemoryLeaks

    public java.lang.String[] findReloadedContextMemoryLeaks()

  Attempt to identify the contexts that have a class loader memory leak. This is usually triggered on context reload. Note: This method attempts to force a full garbage collection. This should be used with extreme caution on a production system.

### 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.

  Specified by:
    `findAliases` in interface `Host`

### getInfo

    public java.lang.String getInfo()

  Return descriptive information about this Container implementation and the corresponding version number, in the format `<description>/<version>`.

  Specified by:
    `getInfo` in interface `Container`
  Overrides:
    `getInfo` in class `ContainerBase`

### 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`.

  Specified by:
    `map` in interface `Host`
  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.

  Specified by:
    `removeAlias` in interface `Host`
  Parameters:
    `alias` - Alias name to be removed

### toString

    public java.lang.String toString()

  Return a String representation of this component.

  Overrides:
    `toString` in class `java.lang.Object`

### start

    public void start()
               throws LifecycleException

  Start this host.

  Specified by:
    `start` in interface `Lifecycle`
  Overrides:
    `start` in class `ContainerBase`
  Throws:
    `LifecycleException` - if this component detects a fatal error that prevents it from being started

### getValveNames

    public java.lang.String[] getValveNames()
                                     throws java.lang.Exception

  Return the MBean Names of the Valves assoicated with this Host

  Throws:
    `java.lang.Exception` - if an MBean cannot be created or registered

### getAliases

    public java.lang.String[] getAliases()

### init

    public void init()

  Description copied from class: `ContainerBase`
  Init method, part of the MBean lifecycle. If the container was added via JMX, it'll register itself with the parent, using the ObjectName conventions to locate the parent. If the container was added directly and it doesn't have an ObjectName, it'll create a name and register itself with the JMX console. On destroy(), the object will unregister.

  Overrides:
    `init` in class `ContainerBase`

### destroy

    public void destroy()
                 throws java.lang.Exception

  Overrides:
    `destroy` in class `ContainerBase`
  Throws:
    `java.lang.Exception`

### preRegister

    public javax.management.ObjectName preRegister(javax.management.MBeanServer server,
                                                   javax.management.ObjectName oname)
                                            throws java.lang.Exception

  Specified by:
    `preRegister` in interface `javax.management.MBeanRegistration`
  Overrides:
    `preRegister` in class `ContainerBase`
  Throws:
    `java.lang.Exception`

### createObjectName

    public javax.management.ObjectName createObjectName(java.lang.String domain,
                                                        javax.management.ObjectName parent)
                                                 throws java.lang.Exception

  Overrides:
    `createObjectName` in class `ContainerBase`
  Throws:
    `java.lang.Exception`

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