Class TapClient


  • public class TapClient
    extends java.lang.Object
    A tap client for memcached.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private java.util.List<java.net.InetSocketAddress> addrs  
      protected long messagesRead  
      protected java.util.HashMap<TapStream,​TapConnectionProvider> omap  
      protected java.util.concurrent.BlockingQueue<java.lang.Object> rqueue  
    • Constructor Summary

      Constructors 
      Constructor Description
      TapClient​(java.net.InetSocketAddress... ia)
      Creates a tap client against the specified servers.
      TapClient​(java.util.List<java.net.InetSocketAddress> addrs)
      Creates a tap client against the specified servers.
    • Field Detail

      • rqueue

        protected java.util.concurrent.BlockingQueue<java.lang.Object> rqueue
      • messagesRead

        protected long messagesRead
      • addrs

        private java.util.List<java.net.InetSocketAddress> addrs
    • Constructor Detail

      • TapClient

        public TapClient​(java.net.InetSocketAddress... ia)
        Creates a tap client against the specified servers. This type of TapClient will TAP the specified servers, but will not be able to react to changes in the number of cluster nodes. Using the constructor which bootstraps itself from the cluster REST interface is preferred.
        Parameters:
        ia - the addresses of each node in the cluster.
      • TapClient

        public TapClient​(java.util.List<java.net.InetSocketAddress> addrs)
        Creates a tap client against the specified servers. This type of TapClient will TAP the specified servers, but will not be able to react to changes in the number of cluster nodes. Using the constructor which bootstraps itself from the cluster REST interface is preferred.
        Parameters:
        addrs - a list of addresses containing each node in the cluster.
    • Method Detail

      • getNextMessage

        public ResponseMessage getNextMessage()
        Gets the next tap message from the queue of received tap messages.
        Returns:
        The tap message at the head of the queue or null if the queue is empty for more than one second.
      • getNextMessage

        public ResponseMessage getNextMessage​(long time,
                                              java.util.concurrent.TimeUnit timeunit)
        Gets the next tap message from the queue of received tap messages.
        Parameters:
        time - the amount of time to wait for a message.
        timeunit - the unit of time to use.
        Returns:
        The tap message at the head of the queue or null if the queue is empty for the given amount of time.
      • hasMoreMessages

        public boolean hasMoreMessages()
        Decides whether the client has received tap messages or will receive more messages in the future.
        Returns:
        true if the client has tap responses or expects to have responses in the future. False otherwise.
      • tapCustom

        public TapStream tapCustom​(java.lang.String id,
                                   RequestMessage message)
                            throws javax.naming.ConfigurationException,
                                   java.io.IOException
        Allows the user to specify a custom tap message.
        Parameters:
        id - the named tap id that can be used to resume a disconnected tap stream
        message - the custom tap message that will be used to initiate the tap stream.
        Returns:
        the operation that controls the tap stream.
        Throws:
        javax.naming.ConfigurationException - a bad configuration was received from the memcached cluster.
        java.io.IOException - if there are errors connecting to the cluster.
      • tapDump

        public TapStream tapDump​(java.lang.String id)
                          throws java.io.IOException,
                                 javax.naming.ConfigurationException
        Specifies a tap stream that will take a snapshot of items in memcached and send them through a tap stream.
        Parameters:
        id - the named tap id that can be used to resume a disconnected tap stream
        Returns:
        the operation that controls the tap stream.
        Throws:
        javax.naming.ConfigurationException - a bad configuration was received from the memcached cluster.
        java.io.IOException - If there are errors connecting to the cluster.
      • shutdown

        public void shutdown()
        Shuts down all tap streams that are currently running.
      • getMessagesRead

        public long getMessagesRead()
        The number of messages read by all of the tap streams created with this client. This will include a count of all tap response types.
        Returns:
        The number of messages read