Package com.sun.xml.ws.transport.tcp.connectioncache.impl.transport

Class OutboundConnectionCacheBlockingImpl<C extends Connection>

java.lang.Object
com.sun.xml.ws.transport.tcp.connectioncache.impl.transport.ConnectionCacheBase<C>
com.sun.xml.ws.transport.tcp.connectioncache.impl.transport.OutboundConnectionCacheBlockingImpl<C>
All Implemented Interfaces:
ConnectionCache<C>, OutboundConnectionCache<C>
public final class OutboundConnectionCacheBlockingImpl<C extends Connection> extends ConnectionCacheBase<C> implements OutboundConnectionCache<C>

  • Field Details

    • totalBusy

      protected int totalBusy

    • totalIdle

      protected int totalIdle

  • Constructor Details

    • OutboundConnectionCacheBlockingImpl

      public OutboundConnectionCacheBlockingImpl(String cacheType, int highWaterMark, int numberToReclaim, int maxParallelConnections, Logger logger)

  • Method Details

    • maxParallelConnections

      public int maxParallelConnections()
      Description copied from interface: OutboundConnectionCache
      Configured maximum number of connections supported per ContactInfo.
      Specified by:
      maxParallelConnections in interface OutboundConnectionCache<C extends Connection>

    • thisClassName

      protected String thisClassName()
      Specified by:
      thisClassName in class ConnectionCacheBase<C extends Connection>

    • canCreateNewConnection

      public boolean canCreateNewConnection(ContactInfo<C> cinfo)
      Description copied from interface: OutboundConnectionCache
      Determine whether a new connection could be created by the ConnectionCache or not.
      Specified by:
      canCreateNewConnection in interface OutboundConnectionCache<C extends Connection>

    • get

      public C get(ContactInfo<C> cinfo) throws IOException
      Description copied from interface: OutboundConnectionCache
      Behaves the same as get( ContactInfo<C>, ConnectionFinder<C> ) except that no connection finder is provided, so that step is ignored.
      Specified by:
      get in interface OutboundConnectionCache<C extends Connection>
      Throws:
      IOException

    • getConnectionState

      public com.sun.xml.ws.transport.tcp.connectioncache.impl.transport.OutboundConnectionCacheBlockingImpl.ConnectionState<C> getConnectionState(ContactInfo<C> cinfo, com.sun.xml.ws.transport.tcp.connectioncache.impl.transport.OutboundConnectionCacheBlockingImpl.CacheEntry<C> entry, C conn)

    • get

      public C get(ContactInfo<C> cinfo, ConnectionFinder<C> finder) throws IOException
      Description copied from interface: OutboundConnectionCache
      Return a Connection corresponding to the given ContactInfo. This works as follows:
      • Call the finder. If it returns non-null, use that connection; (Note that this may be a new connection, created in the finder)
      • otherwise, Use an idle connection, if one is available;
      • otherwise, create a new connection, if not too many connections are open;
      • otherwise, use a busy connection.
      Note that creating a new connection requires EITHER:
      • there is no existing connection for the ContactInfo
      • OR the total number of connections in the cache is less than the HighWaterMark and the number of connections for this ContactInfo is less than MaxParallelConnections.
      We will always return a Connection for a get call UNLESS we have no existing connection and an attempt to create a new connection fails. In this case, the IOException thrown by ContactInfo.create is propagated out of this method.

      It is possible that the cache contains connections that no longer connect to their destination. In this case, it is the responsibility of the client of the cache to close the broken connection as they are detected. Connection reclamation may also handle the cleanup, but note that a broken connection with pending responses will never be reclaimed.

      Note that the idle and busy connection collections that are passed to the finder are unmodifiable collections. They have iterators that return connections in LRU order, with the least recently used connection first. This is done to aid a finder that wishes to consider load balancing in its determination of an appropriate connection.

      Specified by:
      get in interface OutboundConnectionCache<C extends Connection>
      Throws:
      IOException

    • release

      public void release(C conn, int numResponsesExpected)
      Description copied from interface: OutboundConnectionCache
      Release a Connection previously obtained from get. Connections that have been released as many times as they have been returned by get are idle; otherwise a Connection is busy. Some number of responses (usually 0 or 1) may be expected ON THE SAME CONNECTION even for an idle connection. We maintain a count of the number of outstanding responses we expect for protocols that return the response on the same connection on which the request was received. This is necessary to prevent reclamation of a Connection that is idle, but still needed to send responses to old requests.
      Specified by:
      release in interface OutboundConnectionCache<C extends Connection>

    • responseReceived

      public void responseReceived(C conn)
      Decrement the number of expected responses. When a connection is idle and has no expected responses, it can be reclaimed.
      Specified by:
      responseReceived in interface OutboundConnectionCache<C extends Connection>

    • close

      public void close(C conn)
      Close a connection, regardless of whether the connection is busy or not.
      Specified by:
      close in interface ConnectionCache<C extends Connection>

    • numberOfConnections

      public long numberOfConnections()
      Description copied from interface: ConnectionCache
      Total number of connections currently managed by the cache.

    • numberOfIdleConnections

      public long numberOfIdleConnections()
      Description copied from interface: ConnectionCache
      Number of idle connections; that is, connections for which the number of get/release or responseReceived/responseProcessed calls are equal.

    • numberOfBusyConnections

      public long numberOfBusyConnections()
      Description copied from interface: ConnectionCache
      Number of non-idle connections. Normally, busy+idle==total, but this may not be strictly true due to concurrent updates to the connection cache.

    • numberOfReclaimableConnections

      public long numberOfReclaimableConnections()
      Description copied from interface: ConnectionCache
      Number of idle connections that are reclaimable. Such connections are not in use, and are not waiting to handle any responses.