Examples of org.apache.derby.iapi.services.daemon.Serviceable

Package org.apache.derby.iapi.services.daemon

Examples of org.apache.derby.iapi.services.daemon.Serviceable

org.apache.derby.iapi.services.daemon.Serviceable
To use a DaemonService, one implements the Serviceable interface. Only one DaemonService will call this at any given time. However, if this Serviceable object subscribes to or enqueues to the DeamonService multiple times, then multiple DaemonService threads may call this Serviceable object at the same time. The Serviceable object must decide what synchronization it needs to provide depending on what work it needs to do. The Serviceable interface does not provide a way to pass a work object to identify what work needs to be done, it is assumed that the Serviceable object knows that. If a Serviceable object has different work for the DaemonService to do, it must somehow encapsulate or identify the different work by an intermediary object which implements the Serviceable interface and which can an identify the different work and pass it along to the object that can deal with them.


  protected void serviceClient(ServiceRecord clientRecord) 
  {
    clientRecord.serviced();


    Serviceable client = clientRecord.client;


    // client may have unsubscribed while it had items queued
    if (client == null)
      return;


    ContextManager cm = contextMgr;


    if (SanityManager.DEBUG)
    {
      SanityManager.ASSERT(cm != null, "Context manager is null");
      SanityManager.ASSERT(client != null, "client is null");
    }


    try
    {
      int status = client.performWork(cm);


      if (clientRecord.subscriber)
        return;


      if (status == Serviceable.REQUEUE)
      {
        List queue = client.serviceASAP() ? highPQ : normPQ;
        synchronized (this) {
          queue.add(clientRecord);


          if (SanityManager.DEBUG) {

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          containerHdl.preDirty(false);
        }




        // remember this as a post commit work item
        Serviceable p = 
                    new ReclaimSpace(
                            ReclaimSpace.CONTAINER, 
                            ckey, 
                            this, 
                            true /* service ASAP */);

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          containerHdl.preDirty(false);
        }




        // remember this as a post commit work item
        Serviceable p = new ReclaimSpace(ReclaimSpace.CONTAINER, ckey,
                         this, true /* service ASAP */);


        if (SanityManager.DEBUG)
                {
                    if (SanityManager.DEBUG_ON(DaemonService.DaemonTrace))

View Full Code Here


  protected void serviceClient(ServiceRecord clientRecord) 
  {
    clientRecord.serviced();


    Serviceable client = clientRecord.client;


    // client may have unsubscribed while it had items queued
    if (client == null)
      return;


    ContextManager cm = contextMgr;


    if (SanityManager.DEBUG)
    {
      SanityManager.ASSERT(cm != null, "Context manager is null");
      SanityManager.ASSERT(client != null, "client is null");
    }


    try
    {
      int status = client.performWork(cm);


      if (clientRecord.subscriber)
        return;


      if (status == Serviceable.REQUEUE)
      {
        List queue = client.serviceASAP() ? highPQ : normPQ;
        synchronized (this) {
          queue.add(clientRecord);


          if (SanityManager.DEBUG) {

View Full Code Here

          containerHdl.preDirty(false);
        }




        // remember this as a post commit work item
        Serviceable p = 
                    new ReclaimSpace(
                            ReclaimSpace.CONTAINER, 
                            ckey, 
                            this, 
                            true /* service ASAP */);

View Full Code Here

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org.apache.derby.impl.services.daemon.BasicDaemon

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org.apache.derby.impl.store.raw.data.RFResource

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