go.uber.org/yarpc@v1.72.1/peer/peerlist/doc.go (about)

     1  // Copyright (c) 2022 Uber Technologies, Inc.
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     4  // of this software and associated documentation files (the "Software"), to deal
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     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  // Package peerlist is deprecated in favor of
    22  // `go.uber.org/yarpc/peer/peerlist/v2` which can additionally convey peer list
    23  // identifiers to the peerlist.Implementation without a wrapper type, allowing
    24  // a peer list updater to communicate shard information for example.
    25  //
    26  // Package peerlist provides a utility for managing peer availability with a
    27  // separate implementation of peer selection from just among available peers.
    28  // The peer list implements the peer.ChooserList interface and accepts a
    29  // peer.ListImplementation to provide the implementation-specific concern of,
    30  // for example, a *roundrobin.List.
    31  //
    32  // The example is an implementation of peer.ChooserList using a random peer selection
    33  // strategy, returned by newRandomListImplementation(), implementing
    34  // peer.ListImplementation.
    35  //
    36  //   type List struct {
    37  //   	*peerlist.List
    38  //   }
    39  //
    40  //   func New(transport peer.Transport) *List {
    41  //   	return &List{
    42  //   		List: peerlist.New(
    43  //   			"random",
    44  //   			transport,
    45  //   			newRandomListImplementation(),
    46  //   		),
    47  //   	}
    48  //   }
    49  //
    50  // The abstract peer list is designed to take responsibility for concurrently
    51  // communicating with three parties: the outbound (which sees it as a
    52  // peer.Chooser), the peer list updater (which see it as a peer.List), and the
    53  // transport (which sees it as a bank of peer.Subscriber).
    54  // By taking care of concurrency, the abstract peer list frees the
    55  // Implementation from the concern of thread safety.
    56  package peerlist