keepalive.go 2.4 KB

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  1. /*
  2. *
  3. * Copyright 2017, Google Inc.
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without
  7. * modification, are permitted provided that the following conditions are
  8. * met:
  9. *
  10. * * Redistributions of source code must retain the above copyright
  11. * notice, this list of conditions and the following disclaimer.
  12. * * Redistributions in binary form must reproduce the above
  13. * copyright notice, this list of conditions and the following disclaimer
  14. * in the documentation and/or other materials provided with the
  15. * distribution.
  16. * * Neither the name of Google Inc. nor the names of its
  17. * contributors may be used to endorse or promote products derived from
  18. * this software without specific prior written permission.
  19. *
  20. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24. * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27. * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28. * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31. *
  32. */
  33. // Package keepalive defines configurable parameters for point-to-point healthcheck.
  34. package keepalive
  35. import (
  36. "time"
  37. )
  38. // ClientParameters is used to set keepalive parameters on the client-side.
  39. // These configure how the client will actively probe to notice when a connection broken
  40. // and to cause activity so intermediaries are aware the connection is still in use.
  41. type ClientParameters struct {
  42. // After a duration of this time if the client doesn't see any activity it pings the server to see if the transport is still alive.
  43. Time time.Duration // The current default value is infinity.
  44. // After having pinged for keepalive check, the client waits for a duration of Timeout and if no activity is seen even after that
  45. // the connection is closed.
  46. Timeout time.Duration // The current default value is 20 seconds.
  47. // If true, client runs keepalive checks even with no active RPCs.
  48. PermitWithoutStream bool
  49. }