Package org.apache.camel.support.cache

Class PollingConsumerServicePool

  • All Implemented Interfaces:
    AutoCloseable, org.apache.camel.NonManagedService, org.apache.camel.Service, org.apache.camel.ShutdownableService, org.apache.camel.StatefulService, org.apache.camel.SuspendableService
    public class PollingConsumerServicePool
extends org.apache.camel.support.service.ServiceSupport
    PollingConsumer pool.

    • Field Summary

      • Fields inherited from class org.apache.camel.support.service.BaseService

        BUILT, FAILED, INITIALIZED, INITIALIZING, lock, NEW, SHUTDOWN, SHUTTING_DOWN, STARTED, STARTING, status, STOPPED, STOPPING, SUSPENDED, SUSPENDING

    • Constructor Summary

      Constructors 
      Constructor Description
      PollingConsumerServicePool​(org.apache.camel.util.function.ThrowingFunction<org.apache.camel.Endpoint,​org.apache.camel.PollingConsumer,​Exception> creator, Function<org.apache.camel.PollingConsumer,​org.apache.camel.Endpoint> getEndpoint, int capacity)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      S acquire​(org.apache.camel.Endpoint endpoint)
      Tries to acquire the producer/consumer with the given key
      void cleanUp()
      Cleanup the pool (removing stale instances that should be evicted)
      protected void doBuild()  
      protected void doStart()  
      protected void doStop()  
      protected void onEvict​(S s)
      This callback is invoked by LRUCache from a separate background cleanup thread.
      void release​(org.apache.camel.Endpoint endpoint, S s)
      Releases the producer/consumer back to the pool
      int size()
      Returns the current size of the pool

      • Methods inherited from class org.apache.camel.support.service.BaseService

        build, doFail, doInit, doLifecycleChange, doResume, doShutdown, doSuspend, fail, getStatus, init, isBuild, isInit, isNew, isRunAllowed, isShutdown, isStarted, isStarting, isStartingOrStarted, isStopped, isStopping, isStoppingOrStopped, isSuspended, isSuspending, isSuspendingOrSuspended, resume, shutdown, start, stop, suspend

      • Methods inherited from interface org.apache.camel.Service

        build, close, init, start, stop

      • Methods inherited from interface org.apache.camel.ShutdownableService

        shutdown

      • Methods inherited from interface org.apache.camel.StatefulService

        getStatus, isRunAllowed, isStarted, isStarting, isStopped, isStopping, isSuspending

      • Methods inherited from interface org.apache.camel.SuspendableService

        isSuspended, resume, suspend

    • Constructor Detail

      • PollingConsumerServicePool

        public PollingConsumerServicePool​(org.apache.camel.util.function.ThrowingFunction<org.apache.camel.Endpoint,​org.apache.camel.PollingConsumer,​Exception> creator,
                                  Function<org.apache.camel.PollingConsumer,​org.apache.camel.Endpoint> getEndpoint,
                                  int capacity)

    • Method Detail

      • onEvict

        protected void onEvict​(S s)
        This callback is invoked by LRUCache from a separate background cleanup thread. Therefore we mark the entries to be evicted from this thread only, and then let SinglePool and MultiPool handle the evictions (stop the producer/consumer safely) when they are acquiring/releases producers/consumers. If we sop the producer/consumer from the LRUCache background thread we can have a race condition with a pooled producer may have been acquired at the same time its being evicted.

      • acquire

        public S acquire​(org.apache.camel.Endpoint endpoint)
          throws Exception
        Tries to acquire the producer/consumer with the given key
        Parameters:
        endpoint - the endpoint
        Returns:
        the acquired producer/consumer
        Throws:
        Exception

      • release

        public void release​(org.apache.camel.Endpoint endpoint,
                    S s)
        Releases the producer/consumer back to the pool
        Parameters:
        endpoint - the endpoint
        s - the producer/consumer

      • size

        public int size()
        Returns the current size of the pool

      • cleanUp

        public void cleanUp()
        Cleanup the pool (removing stale instances that should be evicted)

      • doBuild

        protected void doBuild()
                throws Exception
        Overrides:
        doBuild in class org.apache.camel.support.service.BaseService
        Throws:
        Exception

      • doStart

        protected void doStart()
                throws Exception
        Overrides:
        doStart in class org.apache.camel.support.service.BaseService
        Throws:
        Exception

      • doStop

        protected void doStop()
               throws Exception
        Overrides:
        doStop in class org.apache.camel.support.service.BaseService
        Throws:
        Exception