Package org.apache.catalina.valves
Class HealthCheckValve
- java.lang.Object
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- org.apache.catalina.util.LifecycleBase
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- org.apache.catalina.util.LifecycleMBeanBase
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- org.apache.catalina.valves.ValveBase
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- org.apache.catalina.valves.HealthCheckValve
 
 
 
 
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- All Implemented Interfaces:
- javax.management.MBeanRegistration,- Contained,- JmxEnabled,- Lifecycle,- Valve
 
 public class HealthCheckValve extends ValveBase Simple Valve that responds to cloud orchestrators health checks.
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Nested Class Summary- 
Nested classes/interfaces inherited from interface org.apache.catalina.LifecycleLifecycle.SingleUse
 
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Field SummaryFields Modifier and Type Field Description protected booleancheckContainersAvailableCheck if all child containers are available.protected booleancontextWill be set to true if the valve is associated with a context.- 
Fields inherited from class org.apache.catalina.valves.ValveBaseasyncSupported, container, containerLog, next, sm
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Fields inherited from class org.apache.catalina.util.LifecycleMBeanBasemserver
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Fields inherited from interface org.apache.catalina.LifecycleAFTER_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
 
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Constructor SummaryConstructors Constructor Description HealthCheckValve()
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description booleangetCheckContainersAvailable()java.lang.StringgetPath()voidinvoke(Request request, Response response)Perform request processing as required by this Valve.protected booleanisAvailable(Container container)voidsetCheckContainersAvailable(boolean checkContainersAvailable)voidsetPath(java.lang.String path)protected voidstartInternal()Start this component and implement the requirements ofLifecycleBase.startInternal().- 
Methods inherited from class org.apache.catalina.valves.ValveBasebackgroundProcess, getContainer, getDomainInternal, getNext, getObjectNameKeyProperties, initInternal, isAsyncSupported, setAsyncSupported, setContainer, setNext, stopInternal, toString
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Methods inherited from class org.apache.catalina.util.LifecycleMBeanBasedestroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister, unregister
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Methods inherited from class org.apache.catalina.util.LifecycleBaseaddLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, getThrowOnFailure, init, removeLifecycleListener, setState, setState, setThrowOnFailure, start, stop
 
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Method Detail- 
getPathpublic final java.lang.String getPath() 
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setPathpublic final void setPath(java.lang.String path) 
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getCheckContainersAvailablepublic boolean getCheckContainersAvailable() 
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setCheckContainersAvailablepublic void setCheckContainersAvailable(boolean checkContainersAvailable) 
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startInternalprotected void startInternal() throws LifecycleExceptionDescription copied from class:ValveBaseStart this component and implement the requirements ofLifecycleBase.startInternal().- Overrides:
- startInternalin class- ValveBase
- Throws:
- LifecycleException- if this component detects a fatal error that prevents this component from being used
 
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invokepublic void invoke(Request request, Response response) throws java.io.IOException, ServletException Description copied from interface:ValvePerform request processing as required by this Valve. An individual Valve MAY perform the following actions, in the specified order: - Examine and/or modify the properties of the specified Request and Response.
- Examine the properties of the specified Request, completely generate the corresponding Response, and return control to the caller.
- Examine the properties of the specified Request and Response, wrap either or both of these objects to supplement their functionality, and pass them on.
- If the corresponding Response was not generated (and control was not
     returned, call the next Valve in the pipeline (if there is one) by
     executing getNext().invoke().
- Examine, but not modify, the properties of the resulting Response (which was created by a subsequently invoked Valve or Container).
 A Valve MUST NOT do any of the following things: - Change request properties that have already been used to direct the flow of processing control for this request (for instance, trying to change the virtual host to which a Request should be sent from a pipeline attached to a Host or Context in the standard implementation).
- Create a completed Response AND pass this Request and Response on to the next Valve in the pipeline.
- Consume bytes from the input stream associated with the Request, unless it is completely generating the response, or wrapping the request before passing it on.
- Modify the HTTP headers included with the Response after the
     getNext().invoke()method has returned.
- Perform any actions on the output stream associated with the
     specified Response after the getNext().invoke()method has returned.
 - 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, or is thrown by a subsequently invoked Valve, Filter, or Servlet
- ServletException- if a servlet error occurs, or is thrown by a subsequently invoked Valve, Filter, or Servlet
 
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isAvailableprotected boolean isAvailable(Container container) 
 
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