org.apache.catalina.loader

## Class VirtualWebappLoader

- java.lang.Object
- - org.apache.catalina.util.LifecycleBase
  - - org.apache.catalina.util.LifecycleMBeanBase
    - - org.apache.catalina.loader.WebappLoader
      - - org.apache.catalina.loader.VirtualWebappLoader

- All Implemented Interfaces:
    PropertyChangeListener, EventListener, MBeanRegistration, Lifecycle, Loader

      public class VirtualWebappLoader
      extends WebappLoader

  A WebappLoader that allows a customized classpath to be added through configuration in context xml. Any additional classpath entry will be added to the default webapp classpath, making easy to emulate a standard webapp without the need for assembly all the webapp dependencies as jars in WEB-INF/lib.

       <Context docBase="\webapps\mydocbase">
         <Loader className="org.apache.catalina.loader.VirtualWebappLoader"
                    virtualClasspath="/dir/classes;/somedir/somejar.jar;
                      /somedir/*.jar"/>
       </Context>

  The `*.jar` suffix can be used to include all JAR files in a certain directory. If a file or a directory does not exist, it will be skipped.

  Author:
    Fabrizio Giustina

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface org.apache.catalina.Lifecycle

      `Lifecycle.SingleUse`

  - ### Field Summary

    - ### Fields inherited from class org.apache.catalina.loader.WebappLoader

      `sm, support`

    - ### Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase

      `mserver`

    - ### Fields inherited from interface org.apache.catalina.Lifecycle

      `AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `VirtualWebappLoader()` Construct a new WebappLoader with no defined parent class loader (so that the actual parent will be the system class loader).
    `VirtualWebappLoader(ClassLoader parent)` Construct a new WebappLoader with the specified class loader to be defined as the parent of the ClassLoader we ultimately create.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `getSearchVirtualFirst()`
    `void` | `setSearchVirtualFirst(boolean searchVirtualFirst)`
    `void` | `setVirtualClasspath(String path)` `virtualClasspath` attribute that will be automatically set from the `Context` `virtualClasspath` attribute from the context xml file.
    `protected void` | `startInternal()` Implement the requirements of `LifecycleBase.startInternal()`.

    - ### Methods inherited from class org.apache.catalina.loader.WebappLoader

      `addPropertyChangeListener, addRepository, backgroundProcess, closeJARs, findRepositories, getClassLoader, getClasspath, getContainer, getDelegate, getDomainInternal, getInfo, getLoaderClass, getLoaderRepositories, getLoaderRepositoriesString, getObjectNameKeyProperties, getReloadable, getRepositories, getRepositoriesString, getSearchExternalFirst, modified, propertyChange, removePropertyChangeListener, setContainer, setDelegate, setLoaderClass, setReloadable, setSearchExternalFirst, stopInternal, toString`

    - ### Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase

      `destroyInternal, getDomain, getObjectName, initInternal, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister`

    - ### Methods inherited from class org.apache.catalina.util.LifecycleBase

      `addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### VirtualWebappLoader

          public VirtualWebappLoader()

      Construct a new WebappLoader with no defined parent class loader (so that the actual parent will be the system class loader).

    - #### VirtualWebappLoader

          public VirtualWebappLoader(ClassLoader parent)

      Construct a new WebappLoader with the specified class loader to be defined as the parent of the ClassLoader we ultimately create.
      Parameters:
        `parent` - The parent class loader

  - ### Method Detail

    - #### setVirtualClasspath

          public void setVirtualClasspath(String path)

      `virtualClasspath` attribute that will be automatically set from the `Context` `virtualClasspath` attribute from the context xml file.
      Parameters:
        `path` - `;` separated list of path elements.

    - #### getSearchVirtualFirst

          public boolean getSearchVirtualFirst()

      Returns:
        Returns searchVirtualFirst.

    - #### setSearchVirtualFirst

          public void setSearchVirtualFirst(boolean searchVirtualFirst)

      Parameters:
        `searchVirtualFirst` - Whether the virtual class path should be searched before the webapp

    - #### startInternal

          protected void startInternal()
                                throws LifecycleException

      Implement the requirements of `LifecycleBase.startInternal()`.
      Overrides:
        `startInternal` in class `WebappLoader`
      Throws:
        `LifecycleException` - if this component detects a fatal error that prevents this component from being used

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