StuckThreadDetectionValve (Apache Tomcat 6.0.51 API Documentation)
Keywords: org.apache.catalina.valves.StuckThreadDetectionValve class

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## org.apache.catalina.valves
Class StuckThreadDetectionValve

    java.lang.Object
      org.apache.catalina.valves.ValveBase
          org.apache.catalina.valves.StuckThreadDetectionValve

All Implemented Interfaces:
  javax.management.MBeanRegistration, Contained, Valve

    public class StuckThreadDetectionValve

extends ValveBase

This valve allows to detect requests that take a long time to process, which might indicate that the thread that is processing it is stuck.

Field Summary

Fields inherited from class org.apache.catalina.valves.ValveBase
`container, containerLog, controller, domain, info, mserver, next, oname`

Constructor Summary
`StuckThreadDetectionValve()`

Method Summary
`void` | `backgroundProcess()` Execute a periodic task, such as reloading, etc.
`long[]` | `getStuckThreadIds()`
`java.lang.String[]` | `getStuckThreadNames()`
`int` | `getThreshold()`
`void` | `invoke(Request request, Response response)` The implementation-specific logic represented by this Valve.
`void` | `setThreshold(int threshold)` Specify the threshold (in seconds) used when checking for stuck threads.

Methods inherited from class org.apache.catalina.valves.ValveBase
`createObjectName, event, getContainer, getContainerName, getController, getDomain, getInfo, getNext, getObjectName, getParentName, postDeregister, postRegister, preDeregister, preRegister, setContainer, setController, setNext, setObjectName, toString`

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

Constructor Detail

### StuckThreadDetectionValve

    public StuckThreadDetectionValve()

Method Detail

### setThreshold

    public void setThreshold(int threshold)

  Specify the threshold (in seconds) used when checking for stuck threads. If <=0, the detection is disabled. The default is 600 seconds.

  Parameters:
    `threshold` - The new threshold in seconds

### getThreshold

    public int getThreshold()

  Returns:
    The current threshold in seconds
  See Also:
    `setThreshold(int)`

### invoke

    public void invoke(Request request,
                       Response response)
                throws java.io.IOException,
                       javax.servlet.ServletException

  The implementation-specific logic represented by this Valve. See the Valve description for the normal design patterns for this method.

  This method MUST be provided by a subclass.

  Specified by:
    `invoke` in interface `Valve`
  Specified by:
    `invoke` in class `ValveBase`
  Parameters:
    `request` - The servlet request to be processed
    `response` - The servlet response to be created
  Throws:
    `java.io.IOException` - if an input/output error occurs
    `javax.servlet.ServletException` - if a servlet error occurs

### backgroundProcess

    public void backgroundProcess()

  Description copied from class: `ValveBase`
  Execute a periodic task, such as reloading, etc. This method will be invoked inside the classloading context of this container. Unexpected throwables will be caught and logged.

  Specified by:
    `backgroundProcess` in interface `Valve`
  Overrides:
    `backgroundProcess` in class `ValveBase`

### getStuckThreadIds

    public long[] getStuckThreadIds()

### getStuckThreadNames

    public java.lang.String[] getStuckThreadNames()

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