Package org.apache.qpid.jms.provider.amqp

Class AmqpTransferTagGenerator

java.lang.Object
org.apache.qpid.jms.provider.amqp.AmqpTransferTagGenerator
public final class AmqpTransferTagGenerator extends Object
Utility class that can generate and if enabled pool the binary tag values used to identify transfers over an AMQP link.

  • Field Details

  • Constructor Details

    • AmqpTransferTagGenerator

      public AmqpTransferTagGenerator()

    • AmqpTransferTagGenerator

      public AmqpTransferTagGenerator(boolean pool)

  • Method Details

    • getNextTag

      public byte[] getNextTag()
      Retrieves the next available tag.
      Returns:
      a new or unused tag depending on the pool option.

    • returnTag

      public void returnTag(byte[] data)
      When used as a pooled cache of tags the unused tags should always be returned once the transfer has been settled.
      Parameters:
      data - a previously borrowed tag that is no longer in use.

    • getMaxPoolSize

      public int getMaxPoolSize()
      Gets the current max pool size value.
      Returns:
      the current max tag pool size.

    • setMaxPoolSize

      public void setMaxPoolSize(int maxPoolSize)
      Sets the max tag pool size. If the size is smaller than the current number of pooled tags the pool will drain over time until it matches the max.
      Parameters:
      maxPoolSize - the maximum number of tags to hold in the pool.

    • isPooling

      public boolean isPooling()
      Returns:
      true if the generator is using a pool of tags to reduce allocations.