80 lines
3.2 KiB
Go
80 lines
3.2 KiB
Go
/*
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*
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* Copyright 2016, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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package stats
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import (
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"net"
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"golang.org/x/net/context"
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)
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// ConnTagInfo defines the relevant information needed by connection context tagger.
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type ConnTagInfo struct {
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// RemoteAddr is the remote address of the corresponding connection.
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RemoteAddr net.Addr
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// LocalAddr is the local address of the corresponding connection.
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LocalAddr net.Addr
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}
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// RPCTagInfo defines the relevant information needed by RPC context tagger.
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type RPCTagInfo struct {
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// FullMethodName is the RPC method in the format of /package.service/method.
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FullMethodName string
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// FailFast indicates if this RPC is failfast.
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// This field is only valid on client side, it's always false on server side.
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FailFast bool
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}
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// Handler defines the interface for the related stats handling (e.g., RPCs, connections).
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type Handler interface {
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// TagRPC can attach some information to the given context.
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// The context used for the rest lifetime of the RPC will be derived from
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// the returned context.
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TagRPC(context.Context, *RPCTagInfo) context.Context
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// HandleRPC processes the RPC stats.
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HandleRPC(context.Context, RPCStats)
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// TagConn can attach some information to the given context.
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// The returned context will be used for stats handling.
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// For conn stats handling, the context used in HandleConn for this
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// connection will be derived from the context returned.
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// For RPC stats handling,
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// - On server side, the context used in HandleRPC for all RPCs on this
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// connection will be derived from the context returned.
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// - On client side, the context is not derived from the context returned.
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TagConn(context.Context, *ConnTagInfo) context.Context
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// HandleConn processes the Conn stats.
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HandleConn(context.Context, ConnStats)
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}
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