InstanceManager (Apache Tomcat 11.0.21 API Documentation)
Description: declaration: package: org.apache.tomcat, interface: InstanceManager

# Interface InstanceManager

All Known Implementing Classes:
  `DefaultInstanceManager, SimpleInstanceManager`

public interface InstanceManager

- ## Method Summary

  Modifier and Type
  Method
  Description
  `default void`
  `backgroundProcess()`
  Called by the component using the InstanceManager periodically to perform any regular maintenance that might be required.
  `void`
  `destroyInstance(Object o)`
  `Object`
  `newInstance(Class<?> clazz)`
  `void`
  `newInstance(Object o)`
  `Object`
  `newInstance(String className)`
  `Object`
  `newInstance(String fqcn, ClassLoader classLoader)`

- ## Method Details

  - ### newInstance

    Object newInstance(Class<?> clazz) throws IllegalAccessException, InvocationTargetException, NamingException, InstantiationException, IllegalArgumentException, NoSuchMethodException, SecurityException
    Throws:
      `IllegalAccessException`
      `InvocationTargetException`
      `NamingException`
      `InstantiationException`
      `IllegalArgumentException`
      `NoSuchMethodException`
      `SecurityException`

  - ### newInstance

    Object newInstance(String className) throws IllegalAccessException, InvocationTargetException, NamingException, InstantiationException, ClassNotFoundException, IllegalArgumentException, NoSuchMethodException, SecurityException
    Throws:
      `IllegalAccessException`
      `InvocationTargetException`
      `NamingException`
      `InstantiationException`
      `ClassNotFoundException`
      `IllegalArgumentException`
      `NoSuchMethodException`
      `SecurityException`

  - ### newInstance

    Object newInstance(String fqcn, ClassLoader classLoader) throws IllegalAccessException, InvocationTargetException, NamingException, InstantiationException, ClassNotFoundException, IllegalArgumentException, NoSuchMethodException, SecurityException
    Throws:
      `IllegalAccessException`
      `InvocationTargetException`
      `NamingException`
      `InstantiationException`
      `ClassNotFoundException`
      `IllegalArgumentException`
      `NoSuchMethodException`
      `SecurityException`

  - ### newInstance

    void newInstance(Object o) throws IllegalAccessException, InvocationTargetException, NamingException
    Throws:
      `IllegalAccessException`
      `InvocationTargetException`
      `NamingException`

  - ### destroyInstance

    void destroyInstance(Object o) throws IllegalAccessException, InvocationTargetException
    Throws:
      `IllegalAccessException`
      `InvocationTargetException`

  - ### backgroundProcess

    default void backgroundProcess()
    Called by the component using the InstanceManager periodically to perform any regular maintenance that might be required. By default, this method is a NO-OP.