Interface Host

  • All Superinterfaces:
    Container, Lifecycle
    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).

    Author:
    Craig R. McClanahan
    • Field Detail

      • ADD_ALIAS_EVENT

        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

        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

      • getXmlBase

        java.lang.String getXmlBase()
        Returns:
        the XML root for this Host. This can be an absolute pathname or a relative pathname. If null, the base path defaults to ${catalina.base}/conf/<engine name>/<host name> directory
      • setXmlBase

        void setXmlBase​(java.lang.String xmlBase)
        Set the Xml root for this Host. This can be an absolute pathname or a relative pathname. If null, the base path defaults to ${catalina.base}/conf/<engine name>/<host name> directory
        Parameters:
        xmlBase - The new XML root
      • getConfigBaseFile

        java.io.File getConfigBaseFile()
        Returns:
        a default configuration path of this Host. The file will be canonical if possible.
      • getAppBase

        java.lang.String getAppBase()
        Returns:
        the application root for this Host. This can be an absolute pathname, a relative pathname, or a URL.
      • getAppBaseFile

        java.io.File getAppBaseFile()
        Returns:
        an absolute File for the appBase of this Host. The file will be canonical if possible. There is no guarantee that that the appBase exists.
      • setAppBase

        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

        boolean getAutoDeploy()
        Returns:
        the value of the auto deploy flag. If true, it indicates that this host's child webapps should be discovered and automatically deployed dynamically.
      • setAutoDeploy

        void setAutoDeploy​(boolean autoDeploy)
        Set the auto deploy flag value for this host.
        Parameters:
        autoDeploy - The new auto deploy flag
      • getConfigClass

        java.lang.String getConfigClass()
        Returns:
        the Java class name of the context configuration class for new web applications.
      • setConfigClass

        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

        boolean getDeployOnStartup()
        Returns:
        the value of the deploy on startup flag. If true, it indicates that this host's child webapps should be discovered and automatically deployed.
      • setDeployOnStartup

        void setDeployOnStartup​(boolean deployOnStartup)
        Set the deploy on startup flag value for this host.
        Parameters:
        deployOnStartup - The new deploy on startup flag
      • getDeployIgnore

        java.lang.String getDeployIgnore()
        Returns:
        the regular expression that defines the files and directories in the host's appBase that will be ignored by the automatic deployment process.
      • getDeployIgnorePattern

        java.util.regex.Pattern getDeployIgnorePattern()
        Returns:
        the compiled regular expression that defines the files and directories in the host's appBase that will be ignored by the automatic deployment process.
      • setDeployIgnore

        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.
        Parameters:
        deployIgnore - A regular expression matching file names
      • getStartStopExecutor

        java.util.concurrent.ExecutorService getStartStopExecutor()
        Returns:
        the executor that is used for starting and stopping contexts. This is primarily for use by components deploying contexts that want to do this in a multi-threaded manner.
      • getCreateDirs

        boolean getCreateDirs()
        Returns true if the Host will attempt to create directories for appBase and xmlBase unless they already exist.
        Returns:
        true if the Host will attempt to create directories
      • setCreateDirs

        void setCreateDirs​(boolean createDirs)
        Should the Host attempt to create directories for xmlBase and appBase upon startup.
        Parameters:
        createDirs - The new value for this flag
      • getUndeployOldVersions

        boolean getUndeployOldVersions()
        Returns:
        true of the Host is configured to automatically undeploy old versions of applications deployed using parallel deployment. This only takes effect is getAutoDeploy() also returns true.
      • setUndeployOldVersions

        void setUndeployOldVersions​(boolean undeployOldVersions)
        Set to true if the Host should automatically undeploy old versions of applications deployed using parallel deployment. This only takes effect if getAutoDeploy() returns true.
        Parameters:
        undeployOldVersions - The new value for this flag
      • addAlias

        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

        java.lang.String[] findAliases()
        Returns:
        the set of alias names for this Host. If none are defined, a zero length array is returned.
      • removeAlias

        void removeAlias​(java.lang.String alias)
        Remove the specified alias name from the aliases for this Host.
        Parameters:
        alias - Alias name to be removed